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RECEIVED k INSTALLATION INSTRUCTIONS ® CITYOFTIGARD INSTRUCTIONS ©2019 Lennox Industries Inc. BUILDING DIVISION E L280 U H(X)E Dallas, Texas USA pE51Gx ELITE®SERIES GAS FURNACE , UPFLOW/HORIZONTAL AIR DISCHARGE %MO ® 507908-02 Supersedes 507908-01 06/2019 THIS MANUAL MUST BE LEFT WITH THE "'' HOMEOWNER FOR FUTURE REFERENCE � �. A This is a safety alert symbol and should never be j' ignored. When you see this symbol on labels or in man- ,. uals, be alert to thepotential forpersonal injury or death. �, 4 +4, < I I 1 rY i Ow 1 6 dr ' `` I ke " ' ' A IMPORTANT n� :;,,,pi,-; DO NOT use the heat exchanger bracket to lift, drag - IA or pull the furnace to its installation location. Doing so n-► °` , ; will loosen the bracket causing noise and or unsafe -- ` fo_ - operation. o o A * Bracket O 4i N, P.1 ant 11 1 r ➢.x'1 tl'---,__ L___________,\ . /" iry1 � J 1 1 t o Contents Unit Dimensions- inches (mm) 2 Electrical 23 EL280UH(X)E Gas Furnace 3 Integrated Control 30 Shipping and Packing List 3 Unit Start-Up 32 Safety 3 Gas Pressure Measurement 33 Use of Furnace as a Construction Heater) 4 Proper Combustion 34 General 4 High Altitude 34 Combustion, Dilution, Ventilation Air 5 Other Unit Adjustments 35 Setting Equipment 8 Sequence of Operation 35 Filters 11 Service 37 Duct System 12 Repair Parts List 39 Venting 13 Start-Up & Performance Check List 40 Gas Piping 21 Blower Data 42 Page 1 ; � 507908-02 Unit Dimensions - inches (mm) NOTE-60C size units that require air volumes over 3-1/8(79) 1800 cfm must have one of the following: - - .---11. Single side return air and Optional Return Air Base 00 1 00 D aa100 with transition that must accommodate required 20 x 25 x 1 inch(508 x 635 x 25 mm)air filter to ' + maintain proper velocity. SUPPLY AIR 2. Bottom return air. FLUE OUTLET 0o0a OPENING 3. Return air from both sides. (Top) e 000 4. Bottom and one side return air. 0000a See Blower Performance Tables for additional information. 0 a 000 a00oo 2 Flue outlet may be horizontal but furnace must be 1 0 0000 vented vertically .% 7T- 3 Optional External Side Return Air Filter Kit is not for use 3 OPTIONAL _I with the optional Return Air Base. EXTERNAL 3-3/4 03 i SIDE RETURN AIR FILTER KIT 25 • (Either Side) (635) TOP VIEW 1-1/2(38) v 27-3/4 Front Panel (705) A AI ► 3-1/4(83) r B `{ 9/16(14) 3(76)Right [1 19-7/16 .i .4_9/16 7(178)Left I (494) I (14) 1 2FLUE OUTLET + (Either Side) 9-1/8(232)Right 3 OPTIONAL 8-5f8(219)Left L GAS PIPING INLET 0 o e e e e a e a o e e EXTERNAL . / (Either Side) a0000eeeeoee SIDE RETURN ■ eeoeeeeeoeee P AIRFILTERKIT • • • (Either Side) 33 5-3/8(137)Right \ELECTRICAL INLET ,/ (838) 2-3/16(56)Left (Either Side) 14-3/4 • - ) 7 A :-., i 23 r I` (584) �� (38) eeeeoo eeeeeo (375) • eoeeeoeeeeee • 1SideReturn 14 e eeeeeee0000 ■ eoeeeeeeeeee 16 ■ Air Opening (356) ee000000eaee (406) ■ (Either Side) t AIR FLOW _1Ilf TI + 1-15/16(49) 5/8 3/4 1.4 1 3/4 (16) 3-1/4 [4 23-1/2,19) C 111F (19) (83)� (597) �� I Bottom Return I Bottom Return Air Opening Air Opening FRONT VIEW SIDE VIEW EL280UHE A B C D Model in. mm in mm in mm in mm 045E36A 14-1/2 368 13-3/8 340 13 330 4-3/4 121 070(X)E36A 090E36B 17-1/2 446 16-3/8 416 16 406 6-1/4 159 090(X)E48B 110E48C 110(X)E60C 21 533 19-7/8 504 19-1/2 495 8 203 Page 2 EL280UH(X)E Gas Furnace A CAUTION The EL280UH(X)E unit is shipped ready for installation As with any mechanical equipment, contact with sharp in the upflow or horizontal right position (for horizontal sheet metal edges can result in personal injury. Take left position the combustion air pressure switch must be care while handling this equipment and wear gloves and moved). The furnace is shipped with the bottom panel in protective clothing. place. The bottom panel must be removed if the unit is to be installed in a horizontal application.The panel may also Certifications be removed in upflow applications. EL280UH(X)E units are CSA International certified to Shipping and Packing List ANSI Z21.47. Package 1 of 1 contains In the USA, installation of gas furnaces must conform with 1 -Assembled EL280UH(X)E unit local building codes. In the absence of local codes, units 1 - Bag assembly containing the following: must be installed according to the current National Fuel Gas Code (ANSI-Z223.1). The National Fuel Gas Code is 2-Screws available from the following address: 1 -Snap bushing American National Standards Institute, Inc. 1 -Snap plug 11 West 42nd Street 1 -Wire tie New York, NY 10036 1 -Vent warning label Clearances 1 - Owner's manual and warranty card Adequate clearance must be made around the air open- The following items may be ordered separately: ings into the vestibule area. In order to ensure proper unit 1 -Thermostat operation, combustion and ventilation air supply must 1 - Suspension kit(for horizontal installations) be provided according to the current National Fuel Gas 1 - Propane/LP changeover kit Code. Vent installations must be consistent with the vent- ing tables (in this instruction) and applicable provisions 1 - Return air base of local building codes. This furnace is CSA International 1 - High altitude kit certified for installation clearances to combustible material 1 -Side filter kit as listed on the unit nameplate and in the tables in figures 7 and 11. Accessibility and service clearances must take Check equipment for shipping damage. If you find any precedence over fire protection clearances. damage, immediately contact the last carrier. NOTE-For installation on combustible floors, the furnace Safety Information shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring. A DANGER Installed Locations Danger of explosion. For installation in a residential garage, the furnace must There are circumstances in which odorant used with be installed so that the burner(s) and the ignition source LP/propane gas can lose its scent. In case of a leak, are located no less than 18 inches (457 mm) above the LP/propane gas will settle close to the floor and may floor. The furnace must be located or protected to avoid pbe difficult to smell. An LP/propane leak detector in aspu damage by vehicles.nar, When a furnace is installed hs in public garage, hangar, or other building that has a should be installed in all LP applications. hazardous atmosphere, the furnace must be installed ac- cording to recommended good practice requirements and AWARNING current National Fuel Gas Code. Improper installation, adjustment, alteration, Temperature Rise service or maintenance can cause property damage, NOTE - Furnace must be adjusted to obtain a tempera- personal injury or loss of life.Installation and service ture rise within the range specified on the unit nameplate. must be performed by a licensed professional Failure to do installer (or equivalent), service agency or the gas so may cause erratic limit operation and may result in pre- supplier. mature heat exchanger failure. This EL280UHE furnace must be installed so that its elec- trical components are protected from water. Page 3 Installed in Combination with a Cooling Coil Use of Furnace as Construction Heater When this furnace is used with cooling units, it shall be in- Lennox does not recommend the use of EL280UH(X)E stalled in parallel with, or on the upstream side of, cooling units as a construction heater during any phase of con- units to avoid condensation in the heating compartment. struction.Very low return air temperatures, harmful vapors See figure 1. With a parallel flow arrangement, a damper and operation of the unit with clogged or misplaced filters (or other means to control the flow of air) must adequately will damage the unit. prevent chilled air from entering the furnace. If the damper EL280UH(X)E units may be used for heating of buildings is manually operated, it must be equipped to prevent op- or structures under construction, if the following conditions eration of either the heating or the cooling unit, unless it is are met: in the full HEAT or COOL setting. See figure 1 • The vent system must be permanently installed per Heating Unit Installed Parallel)to Air Handler Unit these installation instructions. Dampers (open during heating operation only) • A room thermostat must control the furnace. The use of fixed jumpers that will provide continuous heating is 1' Gas Unit not allowed. • The return air duct must be provided and sealed to the furnace. III ` • Return air temperature range between 60°F(16°C)and Air Handler Unit 80°F(27°C) must be maintained. Dampers • Air filters must be installed in the system and must be (open during cooling operation only) maintained during construction. • Air filters must be replaced upon construction comple- tion. Heating Unit Installed Upstream of Cooling Unit • The input rate and temperature rise must be set per the h S furnace rating plate. H Gas unit • One hundred percent(100%) outdoor air must be pro- vided for combustion air requirements during construc- Evaporator lion. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furnace. Size the temporary duct following these instructions in FIGURE 1 section for Combustion, Dilution and Ventilation Air in a When installed,this furnace must be electrically grounded confined space with air from outside. according to local codes. In addition, in the United States, • The furnace heat exchanger, components, duct sys- installation must conform with the current National Elec- tern, air filters and evaporator coils must be thoroughly tric Code,ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following ad- cleaned following final construction clean-up. dress: • All furnace operating conditions (including ignition, in- National Fire Protection Association put rate, temperature rise and venting)must be verified 1 Battery March Park according to these installation instructions. Quincy, MA 02269 General NOTE- This furnace is designed for a minimum continu- These instructions are intended as a general guide and do ous return air temperature of 60°F(16°C)or an intermittent not supersede local codes in any way. Consult authorities operation down to 55°F(13°C) dry bulb for cases where a having jurisdiction before installation. night setback thermostat is used. Return air temperature must not exceed 85°F(29°C) dry bulb. In addition to the requirements outlined previously, the following general recommendations must be considered The EL280UH(X)E furnace may be installed in alcoves, when installing a EL280UH(X)E furnace: closets, attics, basements, garages, crawl spaces and utility rooms in the upflow or horizontal position. • Place the furnace as close to the center of the air This furnace design has not been CSA International distribution system as possible.The furnace should certified for installation in mobile homes, recreational also be located close to the chimney or vent termi- vehicles, or outdoors. nation point. Page 4 • Do not install the furnace where drafts might blow CAUTION directly into it. This could cause improper combus- tion and unsafe operation. Insufficient combustion air can cause headaches, • Do not block the furnace combustion air openings nausea,dizziness or asphyxiation. It will also cause excess water in the heat exchanger resulting in with clothing, boxes, doors, etc. Air is needed for rusting and premature heat exchanger failure. proper combustion and safe unit operation. Excessive exposure to contaminated combustion • When the furnace is installed in an attic or other air will result in safety and performance related insulated space, keep insulation away from the fur- problems. Avoid exposure to the following nace. substances in the combustion air supply: Permanent wave solutions • Please consult the manufacturer of your evaporator Chlorinated waxes and cleaners coil for their recommendations on distance required Chlorine base swimming pool chemicals between the heat exchanger and their drain pan. Adequate space must be provided between the Water softening chemicals drain pan and the furnace heat exchanger De-icing salts or chemicals Carbon tetrachloride NOTE- The Commonwealth of Massachusetts stipu- lates these additional requirements: Halogen type refrigerants • Gas furnaces shall be installed by a licensed Cleaning solvents(such as perchloroethylene) plumber or fitter only. Printing inks, paint removers, varnishes,etc. Hydrochloric acid • The gas cock must be "T handle"type. Cements and glues • When a furnace is installed in an attic, the pas- Antistatic fabric softeners for clothes dryers sageway to and service area surrounding the Masonry acid washing materials equipment shall be floored. Combustion, Dilution &Ventilation Air All gas-fired appliances require air for the combustion process. If sufficient combustion air is not available, the In the past, there was no problem in bringing in sufficient furnace or other appliances will operate inefficiently and outdoor air for combustion. Infiltration provided all the air unsafely. Enough air must be provided to meet the needs that was needed. In today's homes, tight construction of all fuel-burning appliances and appliances such as ex- practices make it necessary to bring in air from outside for haust fans which force air out of the house.When fireplac- combustion. Take into account that exhaust fans, appli- es, exhaust fans, or clothes dryers are used at the same ance vents, chimneys, and fireplaces force additional air time as the furnace, much more air is necessary to ensure that could be used for combustion out of the house. Un- proper combustion and to prevent a downdraft. Insufficient less outside air is brought into the house for combustion, air causes incomplete combustion which can result in car- negative pressure (outside pressure is greater than inside bon monoxide. pressure) will build to the point that a downdraft can oc- In addition to providing combustion air, fresh outdoor air cur in the furnace vent pipe or chimney.As a result, corn- dilutes contaminants in the indoor air.These contaminants bustion gases enter the living space creating a potentially may include bleaches, adhesives, detergents, solvents dangerous situation. and other contaminants which can corrode furnace corn- In the absence of local codes concerning air for combus- ponents. tion and ventilation, use the guidelines and procedures in The requirements for providing air for combustion and this section to install EL280UH(X)E furnaces to ensure ventilation depend largely on whether the furnace is in- efficient and safe operation. You must consider combus- stalled in an unconfined or a confined space. tion air needs and requirements for exhaust vents and gas piping. A portion of this information has been reprinted Unconfined Space with permission from the National Fuel Gas Code (AN- An unconfined space is an area such as a basement or SI-Z223.1). This reprinted material is not the complete large equipment room with a volume greater than 50 cubic and official position of the ANSI on the referenced subject, feet(1.42 m3)per 1,000 Btu (.29 kW) per hour of the corn- which is represented only by the standard in its entirety bined input rating of all appliances installed in that space. A CAUTION This space also includes adjacent rooms which are not separated by a door. Do not install the furnace in a corrosive or contaminated atmosphere. Meet all combustion and ventilation air requirements, as well as all local codes. Page 5 Though an area may appear to be confined, it might be Air from Inside necessary to bring in outdoor air for combustion if the If the confined space that houses the furnace adjoins a structure does not provide enough air by infiltration. If the space categorized as unconfined, air can be brought in by furnace is located in a building of tight construction with providing two permanent openings between the two spac- weather stripping and caulking around the windows and es. Each opening must have a minimum free area of 1 doors, follow the procedures in the air from outside sec square inch (645 mm2)per 1,000 Btu (.29 kW)per hour of tion. total input rating of all gas-fired equipment in the confined Confined Space space. Each opening must be at least 100 square inches A confined space is an area with a volume less than 50 (64516 mm2). One opening shall be within 12 inches(305 cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of mm)of the top of the enclosure and one opening within 12 the combined input rating of all appliances installed in that inches (305 mm)of the bottom. See figure 2. space. This definition includes furnace closets or small Air from Outside equipment rooms. If air from outside is brought in for combustion and ventila- When the furnace is installed so that supply ducts carry tion, the confined space must have two permanent open- air circulated by the furnace to areas outside the space ings. One opening shall be within 12 inches (305 mm) of containing the furnace, the return air must be handled by the top of the enclosure and one opening within 12 inches ducts which are sealed to the furnace casing and which (305 mm) of the bottom. These openings must communi- terminate outside the space containing the furnace. This cate directly or by ducts with the outdoors or spaces(crawl is especially important when the furnace is mounted on or attic) that freely communicate with the outdoors or in- a platform in a confined space such as a closet or small directly through vertical ducts. Each opening shall have a equipment room. minimum free area of 1 square inch (645 mm2) per 4,000 Even a small leak around the base of the unit at the plat- Btu (1.17 kW)per hour of total input rating of all equipment form or at the return air duct connection can cause a po- in the enclosure. See figures 3 and 4. When communi- tentially dangerous negative pressure condition. Air for cating with the outdoors through horizontal ducts, each combustion and ventilation can be brought into the con- opening shall have a minimum free area of 1 square inch fined (645 mm2) per 2,000 Btu (.56 kW) per total input rating of all equipment in the enclosure. See figure 5. EQUIPMENT IN CONFINED AIL When ducts are used,theyshall be of the same cross-sec- CHIMNEY SPACE ALL AIR FROM INSIDE O VENTS tional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be no less than 3 inches (75 mm). In calculating free area, the blocking effect of louvers, grilles, or screens III WATER I must be considered. If the design and free area of protec- TER Ttive covering is not known for calculating the size opening FURN E �� required, it may be assumed that wood louvers will have A. s OPENINGS 20 to 25 percent free area and metal louvers and grilles iwa�an Dorm�` will have 60 to 75 percent free area. Louvers and grilles in o . must be fixed in the open position or interlocked with the I �� �" I equipment so that they are opened automatically during ( `I I' equipment operation. NOTE-Each opening shall have a free area of at least one square inch(645 mm2)per 1,000 Btu(29 kW)per hour of the total input rat- ing of all equipment in the enclosure,but not less than 100 square inches(64516 mm2). FIGURE 2 Page 6 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE ^ (Inlet Air from Crawlspace and Outlet Air to Ventilated Attic) CHIMNEY OR GAS VENT VENTILATION LOUVERS (Each end of aftic) OUTLET FURNACE I AIR WATER ',(TL�Y HEATER VENTILATION I INLET LOUVERS � AIR (For unhealed crawl space) II ,. _ _ 111I " I� II I r aim ) r r NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch(645 mm2)per 4,000 Btu(1.17 kW)per hour of the total input rating of all equipment in the enclosure. Figure 3 EQUIPMENT IN CONFINED SPACE EQUIPMENT IN ALL AIR FROM OUTSIDE CONFINED SPACE CHIMNEY (All Air Through Ventilated Attic) ALL AIR FROM OR GAS OUTSIDE VENT CHIMNEY OR GAS VENTILATION LOUVERS VENT WATER (Each end of attic) HEATER N. I II II I ' OUTLET AIR / : OUTLET AIR 4.Mr "1 FURNACE I FURN ICE11 Aft A INLET AIR LI I I (Ends 12of in. \\\y 'I�I �'II/above bottom) M I II= M- M Ci • INLET AIR J I I I WATER I I I 11��1� I I I (` I,I I I I ii n_ D LJ HEATER I I I I I I I I I I I I I I I I I I I I I 1 I I III I 1 I I I NOTE-Each air duct opening shall have a free area of at least 1 1 1 1 ) 1yl I I I I I one square inch(645 mm2)per 2,000 Btu(59 kW)per hour of I 1 1 1 1 I I I I ) I the total input rating of all equipment in the enclosure. If the NOTE-The inlet and outlet air openings shall each have a equipment room is located against an outside wall and the air free area of at least one square inch(645 mm2)per 4,000 openings communicate directly with the outdoors,each open- Btu(1.17 kW)per hour of the total input rating of all equip- ing shall have a free area of at least one square inch(645 mm2) ment in the enclosure. per 4,000 Btu(1.17 kW)per hour of the total input rating of all other equipment in the enclosure. FIGURE 4 FIGURE 5 Page 7 Setting Equipmet Upflow Applications Allow for clearances to combustible materials as indicated AWARNING on the unit nameplate. Minimum clearances for closet or Do not install the furnace on its front or its back. Do alcove installations are shown in figure 7. not connect the return air ducts to the back of the Upflow Application Installation Clearances furnace.Doing so will adversely affect the operation Top of the safety control devices, which could result in �or----- personal injury or death. The EL280UH(X)E gas furnace can be installed as shipped ee°aeeeeee°e in either the upflow position or the horizontal position. Left Side Right Side Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas supply connections, electrical supply, vent connection, and installation and service clearances [24 inches (610 "�}"'�� mm)at unit front]. The unit must be level. a - "° - , s Bottom Units with 1/2 and 3/4 hp blower motor are equipped with three flexible legs and one rigid leg. The rigid leg Type of Vent Type C Type 61 Connector is equipped with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used Top 1 in.(25 mm) 1 in.(25 mm) with a flexible mounting leg). See figure 6. The bolt and *Front 2-1/4 in.(57 mm)** 2-1/4 in.(57 mm) washer must be removed before the furnace is placed into operation.After the bolt and washer have been re- Back 0 0 moved, the rigid leg will not touch the blower housing. Sides of 0 Vent 6 in.(152 mm) 1 in.(25 mm) Units with 1/2 or 3/4 HP Blower Motor Floor 0$ 0$ J *Front clearance in alcove installation must be 24 in.(610 mm). �_ © �' Maintain a minimum of 24 in.(610 mm)for front service access. RIGID LEG **3-1/4 in.if single wall vent pipe is used. remove shipping bolt and washe *For installation on a combustible floor,do not install the furnace \�\ I'• directly carpeting,tile or other combustible materials other than wood qu tLeft side requires 3 inches if a single wall vent is used on 14-1/2 inch cabinets,or 2 in.if a single wall vent is used on 17-1/2 in.cabi- , nets. FIGURE 6 FIGURE 7 Page 8 Return Air--Upflow Applications Single Side Return Air Return air can be brought in through the bottom or either (with transition and filter) side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely. The furnace is equipped with a removable bottom M O panel to facilitate installation. 20"X 25"X 1" Markings are provided on both sides of the furnace cab- _=0000_====0 (508mm X635mm X 25mm) =ee00000=== inet for installations that require side return air.air. Cut the 0====0=0===0 Cleanable Filter 000000=00000 furnace cabinet at the maximum dimensions shown on page 2. NOTE- 60C units that require air volumes over 1800 cfm (850 Us) must have one of the following: 1 - Single side return air with transition to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air Return Air filter. (Required to maintain proper air velocity.) See =__________= Plenum =O=0 0 C 0=____ figure 8. 0p=0O=0===== 0==0=0====C0 =000=000000= 2 - Single side return air with optional return airbase. At See figure 9. AIR FLOW 3- Bottom return air. _\ 4- Return air from both sides. Transition 5- Bottom and one side return air. Refer to Engineering Handbook for additional information.. FIGURE 8 Optional Return Air Base (Upflow Applications Only --For use with A, B, C and D cabinets) --- FURNACE FRONT IF BASE 0 1 23(584) T c==OC===ee= IS USED 3-1/4 O ===le=o=e e==0 WITHOUT (83) (Maximum) I Minimum e==Le.====e==a ===e e=====00 IAO CABINET, 11 (279) e=======0==e INDOOR AIR ASINGLE�II 2 Maximum 22-7/16 R PLENUM I Unit side return air 14(356) (570) MUST ' Opening } Overall AIR FLOW COVER BOTH (Maximum) 1. �;1 UNITAND i# . RETURN 1 5-5/8 SIDE RETURN : AIR BASE 7-1/4 AIR OPENINGS OPENINGS ) (184) (143) (Either Side) k14-1/2"(368)A Width(65W75)1 RETURNOPTIO AIR BASE (58) 17-1/2"(446)B Width(50W98) 26-7/8 (19) 21"-(533)C Width(50W99) (683) 24-1/2"-(622) D Width(51 W00) SIDE VIEW NOTE-Optional Side Return Air Filter Kits are not for use with Optional Return Air Base. I Both the unit return air opening and the base return air opening must be covered by a single plenum or IAO cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air(W x H):23 x 11 in.(584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field.There are cutting guides stenciled on the cabinet for the side return air opening.The size of the opening must not extend beyond the markings on the furnace cabinet. 2 To minimize oressure drop.the largest peening"heiaht nossihle tun to 14 inches)is preferred. FIGURE 9 Page 9 Removing the Bottom Panel Horizontal Applications Remove the two screws that secure the bottom cap to the The EL280UH(X)E furnace can be installed in horizontal furnace. Pivot the bottom cap down to release the bottom applications. Order horizontal suspension kit (51W10) panel. Once the bottom panel has been removed, reinstall from Lennox, or use equivalent suspension method. the bottom cap. See figure 10 Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum clearances for closet or Removing the Bottom Panel alcove installations are shown in figure 11. . This furnace may be installed in either an attic or a crawl- / space. Either suspend the furnace from roof rafters or j floor joists, as shown in figure 12, or install the furnace on // / a platform, as shown in figure 13. / Typical Horizontal Application Unit Suspended in Attic or Crawlspace ( / Bracket i /Metal Strap O Bottom Cap 3/16 inch Ii7 • Screw n 1/ \ i Ic 4. Air Flow i \iofom Cap \ I Ti Bottom Panel FIGURE 10 FIGURE 12 NOTE- Heavy-gauge perforated sheet metal straps may Horizontal Application be used to suspend the unit from roof rafters or ceiling Installation Clearances Top p sus joists. When straps are used to end the unit in this p 6 way, support must be provided for both the ends. The Q. 00B0o 00000 straps must not interfere with the plenum or exhaust pip- • a M 000aot•I ing installation. Cooling coils and supply and return air pie- Left oo;oo coo" §I Right End - o c0000 End nums must be supported separately. I °°•°° 0 00 00 k NOTE - When the furnace is installed on a platform in a Bottom crawlspace, it must be elevated enough to avoid water damage and to allow the evaporator coil to drain. Vent Connector j Type Type C Type B1 Return Air--Horizontal Applications Top 0 o Return air must be brought in through the end of a fur- nace installed in a horizontal application. The furnace is *Front 2-1/4 in.(57 mm)** 2-14 in.(57 mm) equipped with a removable bottom panel to facilitate in- Back 0 0 stallation. See figure 10. Ends 2 in.(51 mm) 2 in.(51 mm) A CAUTION Vent 6 in.(152 mm) 1 in.(25 mm) - If this unit is being installed in a space serviced by Floor o$ 0$ an exhaust fan, power exhaust fan, or other device *Front clearance in alcove installation must be 24 in. (610 mm). which may create a negative pressure in the space, Maintain a minimum of 24 in.(610 mm)for front service access. take care when sizing the inlet air opening. The **3-1/4 in.if single wall vent pipe is used. $For installations on a combustible floor,do not install the furnace inlet air opening must be sized to accommodate the directly on carpeting, tile or other combustible materials other maximum volume of exhausted air as well as the than wood flooring. maximum volume of combustion air required for all FIGURE 11 gas appliances serviced by this space. Page 10 Horizontal Application A WARNING Unit Installed on Platform Line contact is permissible .44 The blower access panel must be securely in place /See the unit nameplate for when the blower and burners are operating. Gas clearances. �j fumes, which could contain carbon monoxide, can �iN% • be drawn into living space resulting in personal \ injuryor death. Gr ENTRYS 'ill -'"--...VENT Filters This unit is not equipped with a filter or rack. A field-pro- vided high-velocity filter is required for the unit to operate `I \ properly. Table 1 lists recommended filter sizes. ��,\ I�1 A IMPORTANT If a highefficiency filter is beinginstalled as part SERVICE PLATFORM`\\\\\� I g y of this system to ensure better indoor air quality, the filter must be properly sized. Highefficiency FIGURE 13 filters have a higher static pressure drop than standardefficiency glass/foam filters. If the pressure drop is too great, system capacity and performance AWARNING may be reduced.The pressure drop may also cause the limit to trip more frequently during the winter and Improper installation of the furnace can result in the indoor coil to freeze in the summer, resulting in personal injury or death. Combustion and flue an increase in the number of service calls. products must never be allowed to enter the return Before using any filter with this system, check the air system or the living space. Use screws and joint specifications provided by the filter manufacturer tape to seal the return air system to the furnace. against the data given in the appropriate Lennox In platform installations with bottom return air, the Product Specifications bulletin. Additional furnace should be sealed airtight to the return air information is provided in Service and Application plenum.A door must never be used as a portion of Note ACC002(August 2000). the return air duct system. The base must provide a stable support and an airtight seal to the furnace. TABLE 1 Allow absolutely no sagging, cracks, gaps, etc. FurnaceCabinet Filter Size The return and supply air duct systems must never Width Side Return Bottom Return be connected to or from other heating devices such as a fireplace or stove, etc. Fire, explosion, A-14-1/2" 16 X 25 X 1 (1) 14 X 25 X 1 (1) carbon monoxide poisoning, personal injury and/or B - 17-1/2" 16 X 25 X 1 (1) 16 X 25 X 1 (1) property damage could result. C-21" 16 X 25 X 1 (1) 20 X 25 X 1 (1) Page 11 Duct System Return Air Plenum Use industry-approved standards (such as those pub- NOTE- Return air must not be drawn from a roomwhere lished by Air Conditioning Contractors of America or Amer- this furnace, or any other gas-fueled appliance (i.e., water ican Society of Heating, Refrigerating and Air Condition- heater), or carbon monoxide producing device (Le., wood ing Engineers) to size and install the supply and return fireplace) is installed. air duct system. See figure 14 for proper duct installation. When return air is drawn from a room,a negative pressure This will result in a quiet and low-static system that has is created in the room. If a gas appliance is operating in uniform air distribution. a room with negative pressure, the flue products can be NOTE- Do not operate the furnace in the heating mode pulled back down the vent pipe and into the room. This with an external static pressure that exceeds 0.5 inches reverse flow of the flue gas may result in incomplete com- w.c. Higher external static pressures may cause erratic bustion and the formation of carbon monoxide gas. This limit operation. toxic gas might then be distributed throughout the house Supply Air Plenum by the furnace duct system. In upflow applications, the return air can be brought in If the furnace is installed without a cooling coil, a remov- through the bottom or either side of the furnace. If a fur- able access panel must be installed in the supply air duct. nace with bottom return air is installed on a platform, make The access panel should be large enough to permit in- an airtight seal between the bottom of the furnace and spection (either by smoke or reflected light) of the heat the platform to ensure that the unit operates properly and exchanger for leaks after the furnace is installed. The safely. Use fiberglass sealing strips, caulking, or equiva- furnace access panel must always be in place when the lent sealing method between the plenum and the furnace furnace is operating and it must not allow leaks into the cabinet to ensure a tight seal. If a filter is installed, size the supply air duct system. Install self tapping screws in the return air duct to fit the filter frame. three evaporator coil screw holes made for horizontal ap- plications to seal the top cap to the vestibule panel. t SUPPLY AIR Install self tapping screws to seal any potential air leaks 41 117 UPPL a AIR Q UPFLOW UNIT HORIZONTAL UNIT FIGURE 14 Page 12 Venting If necessary reposition the combustion air inducer, pres- sure switch and or make up box as needed per the follow- A 4-inch diameter flue transition is factory-installed on ing steps and see figures 17 through 22. the combustion air inducer outlet of all models. Figure 16 1 Remove the four mounting screws which secure the shows the combustion air inducer as shipped from the fac- combustion air inducer/ pressure switch assembly tory. to the orifice plate. See figure 15. Lift and rotate Mounting Screws Location the assembly 90 degrees clockwise or counter clockwise to either the 3 o'clock position or to 9 Mounting Screws o'clock position and re-secure with four screws. Gasket should be left in place. --- �, 2 - Use tin snips to cut preferred opening on the cabinet \�� `' for repositioning the flue outlet. Use the cut out piece r` ' (J `\\ as a cover plate to patch unused opening on cabine / 010.41 �� CC) .. \ \\ UPFLOW POSITION o �a O ��� V ' o Left Side Vent Discharge O rid Cover Plate Box if Os' �� T\ Pressure 041,� ° 'o Switch ,� ® /Collector , (./ Vent Pipe n`s� •`off \` Make-Up \ • 4 �.. l l Nt7 ` / Box FIGURE 15 y-e UPFLOW POSITION - . 0 Flue ® o 0 Top Vent Discharge Transition LI - J,n' .a.LI AIRFLOW Vent Pipe Flue / Collector Box • Gas supply piping must be brought into the unit from the right Transition side in order to accommodate the flue pipe. • Remove make-up box assembly(2 screws)and cut wire tie to V free make-up box wires.Re-install make-up box on other side Pressure /tri# of cabinet. Switch r Re-secure make-up box wires, either pulling excess wires `i W+, through the blower compartment and securing with supplied 0- %' wire tie,or coil excess wire and secure to the gas manifold. Make-Up ,� �o n Box `II'%or m QO '• ' II� FIGURE 17 f ,. • UPFLOW POSITION j�+ 3; � - x_0 Right Side Vent Discharge Cover Plate T \ T I O Flue Transition Pressure Switch Vent Pipe 1.1' _ 1 w Collector.......,...„.....Pressure • ." 4 AIRA FLow Box ii III , ,,,-- �0 �.'l� fl Mil CI= O m FIGURE 16 .A_at. "' -� A IMPORTANT Make-Up , .0) The unit will not vent properly with the flue transition 15-1Ut ° o[01 pointed down in the 6 o'clock position. The AIRtFLow c.n. =n00'1 combustion air inducer may be rotated clockwise - or counterclockwise by 90° to allow for top or side • Pressure switch tubing may be too long.Cut to vent discharge in all applications. When the unit is fit,then re-attach to barbed fitting on pressure installed,the flue transition must be in the 9 o'clock, switch.Tubing must not be allowed to sag. 12 o'clock or 3 o'clock position. FIGURE 18 Page 13 HORIZONTAL LEFT POSITION HORIZONTAL RIGHT POSITION Top Vent Discharge Top Vent Discharge Vent Pipe \� Pressure Switch Vent Pipe L 7 Flue Transitio Pressure Switch .,- /-(,- - -- - is' 4„:41r, , Al 4 . /7 010 y9'II�I I(�, —pJ i , I Flue • Transition� "r � 7 xg I �� IT��4,VO m Cover Plate I 4 AIR 'i • 7r4 \ I m r a 9B'6 FLOW4 0 '•`®-gyp\ / m1l ® FLOW i`m�•. Cover Plat IOLA ® , / , ®� ✓ r Collector Box o° A Make-Up Box Collector Box � \\� Ii • Disconnect pressure switch hose from barbed fitting on the pres- \ sure switch assembly. Remove pressure switch assembly (1 m screw)and cut wire tie to free pressure switch wires. Re-install Make-Up Box pressure switch on the other side of orifice plate and re-connect • Gas supply piping must be brought into the unit from the bottom pressure switch hose. in order to accommodate the flue pipe. • Re-secure pressure switch wires by either pulling excess wires • Remove make-up box assembly(2 screws)and cut wire tie to through the blower compartment and securing with supplied wire free make-up box wires.Re-install make-up box on other side tie or coil excess wire and secure to the gas manifold. of cabinet. FIGURE 19 • Re-secure make-up box wires by either pulling excess wires through the blower compartment and securing with supplied wire tie,or coil excess wire and secure to the gas manifold. HORIZONTAL LEFT POSITION FIGURE 21 Side Vent Discharge Pressure Switch HORIZONTAL RIGHT POSITION _ - - Side Vent Discharge ® ems_ �` /, ® ] Pressure Switch .-. .B` `� �10042111 AIR + � < BB•U . icz.:.!II., ,-7. FLOW b 1,_.,., ..f.... 4_ AIR r__ cm. co VVII 5 Flue Transition ®�ilr& ,______2 -� FLOW ' `0,B` j•i. Flue I o /\ o ®• •I ° Transition Make-Up Box Collector Box D 07 c I i • co • Disconnect pressure switch hose from barbed fitting on the -(D \' • ° pressure switch assembly.Remove pressure switch assembly i_° ° \ Collector Box (1 screw)and cut wire tie to free pressure switch wires. Re- install pressure switch on the other side of orifice plate and re- make upbox connect pressure switch hose. • Re-secure pressure switch wires by either pulling excess wires FIGURE 22 through the blower compartment and securing with supplied wire tie,or coil excess wire and secure to the gas manifold. FIGURE 20 Page 14 The EL280UH(X)E series units are classified as fan-as- Venting Using a Masonry Chimney sisted Category I furnaces when vertically vented accord- ing to the latest edition of National Fuel Gas Code (NFPA The following additional requirements apply when a lined 54 /ANSI Z223.1) in the USA. A fan-assisted Category I masonry chimney is used to vent this furnace. furnace is an appliance equipped with an integral mechan- Masonry chimneys used to vent Category I central furnac- ical means to either draw or force combustion products es must be either tile-lined or lined with a listed metal lining through the combustion chamber and/or heat exchanger. system or dedicated gas vent. Unlined masonry chimneys The EL280UHE is not approved for use with horizontal are prohibited.See figures 24 and 25 for common venting. venting. A chimney with one or more sides exposed to the outside NOTE - Use these instructions as a guide. They do not of the structure is considered to be an exterior chimney. supersede local codes. This furnace must be vented ac- An exterior masonry chimney that is not tile-lined must be cording to all local codes these installation instructions, lined with B1 vent or a listed insulated flexible metal vent. and the provided venting tables in these instructions An exterior tile-lined chimney that is sealed and capped The venting tables in this manual were extracted from the may be lined with a listed uninsulated flexible metal vent. National Fuel Gas Code (NFPA 54/ANSI Z223.1)and are If the existing chimney will not accommodate a listed met- provided as a guide for proper vent installation. Proper al liner, either the chimney must be rebuilt to accommo application,termination, construction and location of vents date one of these liners or an alternate approved venting must conform to local codes having jurisdiction. In the ab- method must be found. sence of local codes, the NFGC serves as the defining Insulation for the flexible vent pipe must be an encapsu- document. lated fiberglass sleeve recommended by the flexible vent Refer to the tables and the venting information contained pipe manufacturer. See figure 24. in these instructions to properly size and install the venting A IMPORTANT system. Use self-drilling sheet metal screws or a mechanical fas- Once the venting system is installed, attach the tener to firmly secure the vent pipe to the round collar of "Disconnected Vent" warning sticker to a visible the flue transition. If self-drilling screws are used to attach area of the plenum near the vent pipe.See figure 22. the vent pipe, it is recommended that three be used. Drive The warning sticker is provided in the bag assembly. one self-drilling screw through the front and one through Order kit 66W04 for additional stickers. each side of the vent pipe and collar. See figure 23. Install the first vent connector elbow at a minimum of six A WARNING inches (152 mm)from the furnace vent outlet. See figure 23. Asphyxiation hazard. The exhaust vent for this furnace must be securely connected to the furnace flue transition at all times. VENT CONNECTION UPFLOW AND HORIZONTAL POSITION "DISCONNECTED VENT' WARNING STICKER / VENT PIPE MI= q (min.6"length / a \ "DISCONNECTED VENT' ot� °ooaa o oaa ems` WARNING oouoo °aa°aaa°°a `�i 4.1, • STICK hto4 aqua °°o° oZi p ooao CI °°°°o °°°°° oee�99 Qaooc °oop0o FLUE TRANSITION °o°° ® �/ o°voe° p0p0 COLLAR °°OP':; oppop p0 °000aoo4°a . � 1 � �� ° ° ° ° ° oo°°o°o°otl'ca Yx '4e FLUE °O°o°o°°° ° o VENT PIPE TRANSITION °°°�aQag (min.6"length) COLLAR Figure 23 Page 15 When inspection reveals that an existing chimney is not Common Venting Using Metal-Lined Masonry Chimney safe for the intended purpose, it shall be rebuilt to conform SEALED to nationally recognized standards, lined or relined with 7 suitable materials, or replaced with a gas vent or chimney MAX.LENGTH % —SEE NOTE 1 / suitable for venting (X EL280UH E series units. The chim- ) RELOW. 5k. 1.5m) MIN.LENGTH—ASney passageway must be checked periodically to ensure minimum SHORT AS PRACTICAL ..,....- EXTERIOR that it is clear and free of obstructions. I. CHIMNEY WITH METAL / LINER Do not install a manual damper, barometric draft regulator, VENT CONNECTOR or flue restrictor between the furnace and the chimney. 4 in.(102 mm)'] --J Never connect a Category I appliance to a chimney that is minimum servicing a solid-fuel appliance. If a fireplace chimney flue — is used to vent this appliance, the fireplace opening must FURNACE be permanently sealed. _.._ —7 A type B or listed chimney lining system that passes OTHE APPLIANCE through an unused masonry chimney flue is not consid- PERMANENTLY ered to be exposed to the outdoors. SEALED FIREPLACE . ,,,,„ OPENING General Venting Requirements NOTE 1-Refer to the provided venting tables for installations. Refer Vent all EL280UH(X)E furnaces according to these in- to the capacity requirements shown In the provided venting tables. structions: FIGURE 24 1 - Vent diameter recommendations and maximum DO NOT insulate the space between the liner and allowable piping runs are found in the provided venting tables. the chimney wall with puffed mica or any other loose granular insulating material. 2 - In no case should the vent or vent connector diameter be less than the diameter specified in the provided A IMPORTANT venting tables. SINGLE appliance venting of a fan-assisted furnace 3-The minimum vent capacity determined by the sizing into a tile-lined masonry chimney(interior or outside tables must be less than the low fire input rating and wall) is PROHIBITED. The chimney must first be the maximum vent capacity must be greater than the lined with either type B1 vent or an insulated single high fire input rating. wall flexible vent lining system which has been 4 -Single appliance vents - If the vertical vent or tile- sized according to the provided venting tables and lined chimney has a larger diameter or flow area than the vent pipe manufacturer's instructions. the vent connector, use the vertical vent diameter to determine the minimum vent capacity and the vent A fan-assisted furnace may be commonly vented into an connector diameter to determine the maximum vent existing lined masonry chimney if the following conditions capacity.The flow area of the vertical vent, however, are met: shall not exceed 7 times the flow area of the listed • The chimney is currently searing at least one draft- appliance categorized vent area, drafthood outlet 1 hoodequipped appliance; area or flue collar area unless designed according to approved engineering methods. • The vent connectors and chimney are sized accord- 5- Multiple appliance vents-The flow area of the largest ing to the provided venting tables. section of vertical vent or chimney shall not exceed If type B1 double-wall vent is used inside a chimney, no 7 times the smallest listed appliance categorized other appliance can be vented into the chimney.The outer vent area, drafthood outlet area or flue collar area wall of type B1 vent pipe must not be exposed to flue prod- unless designed according to approved engineering ucts.A type B1 vent or masonry chimney liner shall termi- methods. nate above the roof surface with a listed cap or a listed roof assembly according to the terms of their respective listings and the vent manufacturer's instructions. Page 16 Common Venting Using Tile-Lined Interior Masonry Chimney a/`nddCCombined Vent Connector MINIMUM LENGTH=AS SHORT AS PRACTICAL. / INTERIOR TILE-LINED FOR MAXIMUM LENGTH SEE NOTE TO LEFT MASONRY CHIMNEY NOTE-Refer to provided venting tables / for installations. NOTE-the chimney must be properly �— sized per provided venting tables or i--. \ lined with listed metal lining system. VENT \ CONNECTOR OTHER PERMANENTLY APPLIANCE SEALED FIREPLACE OPENING FURNACE I Figure 25 6 -The entire length of single wall metal vent connector 10-The vent pipe should be as short as possible with shall be readily accessible for inspection, cleaning, the least number of elbows and angles required to and replacement. complete the job. Route the vent connector to the 7- Single appliance venting configurations with vent using the shortest possible route. zero lateral lengths (table 3) is assumed to have 11 -A vent connector shall be supported without any no elbows in the vent system. For all other vent dips or sags and shall slope a minimum of 1/4 inch configurations, the vent system is assumed to have (6.4 mm) per linear foot (305 mm) of connector, two 90° elbows. For each additional 90° elbow or back toward the appliance. equivalent (for example two 45° elbows equal one 12 -Vent connectors shall be firmly attached to the 90°elbow) beyond two, the maximum capacity listed furnace flue collar by self-drilling screws or other in the venting table should be reduced by 10% (0.90 approved means, except vent connectors of listed x maximum listed capacity). type B vent material which shall be assembled 8-The common venting tables(4 and 5)were generated according to the manufacturer's instructions. Joints using a maximum horizontal vent connector length of between sections of single wall connector piping 1-1/2 feet(.46 m)for each inch (25 mm)of connector shall be fastened by screws or other approved diameter as follows: means. TABLE 2 13 -When the vent connector used for Category I appliances must be located in or pass through Connector Diameter Maximum Horizontal a crawlspace, attic or other areas which may inches (mm) Connector Length feet (m) be cold, that portion of the vent connector shall be constructed of listed double-wall type B vent 3 (76) 4-1/2 (1.37) material or material having equivalent insulation 4 (102) 6 (1.83) qualities. j 5 (127) 7-1/2 (2.29) 14-All venting pipe passing through floors, walls, and 6 (152) 9 (2.74) ceilings must be installed with the listed clearance to combustible materials and be fire stopped 7 (178) 10-1/2(3.20) according to local codes. In absence of local codes, 9- If the common vertical vent is offset, the maximum refer to NFGC (Z223.1). common vent capacity listed in the common venting 15 -No portion of the venting system can extend into, tables should be reduced by 20%, the equivalent or pass through any circulation air duct or plenum. of two 90° elbows (0.80 x maximum common vent capacity).The horizontal length of the offset shall not exceed 1-1/2 feet (.46 m) for each inch (25 mm) of common vent diameter. Page 17 16 -Vent connectors serving Category I appliances shall 20 - Do not install a manual damper, barometric draft not be connected to any portion of mechanical draft regulator or flue restrictor between the furnace and systems operating under positive pressure such as the chimney. Category III or IV venting systems. 21 -When connecting this appliance to an existing 17 - If vent connectors are combined prior to entering dedicated or common venting system, you must the common vent, the maximum common vent inspect the venting system's general condition capacity listed in the common venting tables must and look for signs of corrosion. The existing vent be reduced by 10%,the equivalent of one 90°elbow pipe size must conform to these instructions and (0.90 x maximum common vent capacity). the provided venting tables. If the existing venting 18 -The common vent diameter must always be at least system does not meet these requirements, it must as large as the largest vent connector diameter. be resized. 19- In no case, shall the vent connector be sized more than two consecutive table size diameters over the size of the draft hood outlet or flue collar outlet. TABLE 3 Capacity of Type B Double-Wall Vents with Type B Double-Wall Connectors Serving a Single Category I Appliance Height Lateral Vent and Connector Diameter-D(inches) H L 3 inch 4 inch 5 inch 6 inch Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) Min Max Min Max Min Max Min Max 0 0 78 0 152 0 251 0 375 6 2 13 51 18 97 27 157 32 232 4 21 49 30 94 39 153 50 227 6 25 46 36 91 47 149 59 223 0 0 84 0 165 0 276 0 415 8 2 12 57 16 109 25 178 28 263 5 23 53 32 103 42 171 53 255 8 28 49 39 98 51 164 64 247 0 0 88 0 175 0 295 0 447 10 2 12 61 17 118 23 194 26 289 5 23 57 32 113 41 187 52 280 10 30 51 41 104 54 176 67 267 0 0 94 0 191 0 327 0 502 2 11 69 15 136 20 226 22 339 15 5 22 65 30 130 39 219 49 330 10 29 59 40 121 51 206 64 315 15 35 53 48 112 61 195 76 301 0 0 97 0 202 0 349 0 540 2 10 75 14 149 18 250 20 377 20 5 21 71 29 143 38 242 47 367 10 28 64 38 133 50 229 62 351 15 34 58 46 124 59 217 73 337 20 48 52 55 116 69 206 84 322 0 0 100 0 213 0 374 0 587 2 9 81 13 166 14 283 18 432 5 21 77 28 160 36 275 45 421 30 10 27 70 37 150 48 262 59 405 15 33 64 44 141 57 249 70 389 20 56 58 53 132 66 237 80 374 30 NA NA 73 113 88 214 104 346 NOTE-Single appliance venting configurations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90°elbows. For each additional 90°elbow or equivalent(for example two 45°elbows equal one 90°elbow)beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent(0.90 x maximum listed capacity). Page 18 TABLE 4 Vent Connector Capacity Type B Double-Wall Vents with Type B Double-Wall Connectors Serving Two or More Category I Appliances Vent and Connector Diameter-D(inches) Height Lateral 3 inch 4 inch 5 inch 6 inch H L (feet) (feet) Appliance Input Rating in Thousands of Btu Per Hour Min Max Min Max Min Max Min Max 1 22 37 35 66 46 106 58 164 6 2 23 41 37 75 48 121 60 183 3 24 44 38 81 49 132 62 199 1 22 40 35 72 49 114 64 176 8 2 23 44 36 80 51 128 66 195 3 24 47 37 87 53 139 67 210 1 22 43 34 78 49 123 65 189 10 2 23 47 36 86 51 136 67 206 3 24 50 37 92 52 146 69 220 1 21 50 33 89 47 142 64 220 15 2 22 53 35 96 49 153 66 235 3 24 55 36 102 51 163 68 248 1 21 54 33 99 46 157 62 246 20 2 2 57 34 105 48 167 64 259 3 23 60 35 110 50 176 66 271 1 20 62 31 113 45 181 60 288 30 2 21 64 33 118 47 190 62 299 3 22 66 34 123 48 198 64 309 TABLE 5 Common Vent Capacity Type B Double-Wall Vents with Type B Double-Wall Connectors Serving Two or More Category I Appliances Vent Vent and Connector Diameter-D(inches) Height 4 inch 5 inch 7 inch 7 inch H Appliance Input Rating in Thousands of Btu Per Hour (feet) FAN+FAN FAN+NAT FAN+FAN FAN+NAT FAN+FAN FAN+NAT FAN+FAN FAN+NAT 6 92 81 140 116 204 161 309 248 8 101 90 155 129 224 178 339 275 10 110 97 169 141 243 194 367 299 15 125 112 195 164 283 228 427 352 20 136 123 215 183 314 255 475 394 30 152 138 244 210 361 297 547 459 Page 19 Removal of the Furnace from Common Vent 3 - Close all building doors and windows and all In the event that an existing furnace is removed from a doors between the space in which the appliances venting system commonly run with separate gas applianc- are located connected ed spacest the sof the venting system es, the venting system is likely to be too large to properly cclo l es d y asd n ar appli of the building.Turn to vent the remaining attached appliances. Conduct the fol- the dryers and any appliances noton connected st lowing test while each appliance is operating and the oth- common venting hoods andsystem Turnbathroom any exhaust er appliances(which are not operating)remain connected fans, such as rangee mspee exhausts,Dont to the common venting system. If the venting system has so they will operate xa maximum speed. Do not been installed improperly, you must correct the system as operatem a summer exhaus fan. Close fireplace indicated in the general venting requirements section. dampers. 4- Follow the lighting instructions.Turn on the appliance A WARNING that is being inspected.Adjust the thermostat so that the appliance operates continuously. CARBON MONOXIDE POISONING HAZARD 5-After the burner have operated for 5 minutes,test for Failure to follow the steps outlined below for leaks of flue gases at the draft hood relief opening. each appliance connected to the venting system Use the flame of a match or candle. being placed into operation could result in carbon 6 -After determining that each appliance connected to monoxide poisoning or death. the common venting system is venting properly, (step The following steps shall be followed for each 3) return all doors, widows, exhaust fans, fireplace appliance connected to the venting system being dampers, and any other gas-burning appliances to placed into operation, while all other appliances their previous mode of operation. connected to the venting system are not in operation: 7- If a venting problem is found during any of the preceding tests, the common venting system must 1 - Seal any unused openings in the common venting be modified to correct the problem. Resize the system. common venting system to the minimum vent pipe 2 - Inspect the venting system for proper size and size determined by using the appropriate tables in horizontal pitch. Determine that there is no blockage, Appendix G. (These are in the current standards of restriction, leakage, corrosion, or other deficiencies the National Fuel Gas Code ANSI Z223.1. which could cause an unsafe condition. Page 20 Gas Piping 2-When connecting the gas supply piping, consider factors such as length of run, number of fittings, and Gas supply piping should not allow more than 0.5"W.C. furnace rating to avoid excessive pressure drop. drop in pressure between gas meter and unit. Supply gas Table 6 lists recommended pipe sizes for typical pipe must not be smaller than unit gas connection. applications. A CAUTION 3-The gas piping must not run in or through air ducts, clothes chutes,gas vents or chimneys,dumb waiters, If a flexible gas connector is required or allowed by or elevator shafts. the authority that has jurisdiction, black iron pipe 4 -The piping should be sloped 1/4 inch (6.4 mm) per shall be installed at the gas valve and extend outside 15 feet (4.57 m) upward toward the meter from the the furnace cabinet.The flexible connector can then furnace. The piping must be supported at proper be added between the black iron pipe and the gas intervals [every 8 to 10 feet (2.44 to 3.01 m)] with supply line. suitable hangers or straps. Install a drip leg in vertical pipe runs to the unit. AWARNING 5-A 1/8" N.P.T. plugged tap or pressure post is located on the gas valve to facilitate test gauge connection. Do not over torque (800 in-Ibs) or under torque (350 See figure 32. in-Ibs) when attaching the gas piping to the gas valve. 6- In some localities, codes may require the installation of a manual main shut-off valve and union (furnished Gas Supply by the installer) external to the unit. The union must be of the ground joint type' 1 - This unit is shipped standard for left or right side installation of gas piping (or top entry in horizontal A IMPORTANT applications)Connect the gas supply piping into the gas valve. The maximum torque is 800 in lbs and Compounds used on threaded joints of gas piping minimum torque is 350 in lbs when attaching the must be resistant to the actions of liquified petroleum gas piping to the gas valve. gases. NOTE - If emergency shutoff is necessary, shut off the main manual gas valve and disconnect main power to the furnace. The installer should properly label these devices. TABLE 6 Gas Pipe Capacity -ft3/hr(m3/hr) Nominal Internal Length of Pipe-feet(m) Iron Pipe Diameter Size Inches inches 10 20 30 40 50 60 70 80 90 100 (mm) (mm) (3.048) (6.096) (9,144) (12,192) (15.240) (18.288) (21.336) (24.384) (27.432) (30,480) 1/2 .622 172 118 95 81 72 65 60 56 52 50 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84) (1.69) (1.58) (1.47) (1.42) 3/4 .824 360 247 199 170 151 137 126 117 110 104 (19.05) (20.930) (10.19) (7.000) (5.63) (4.81) (4.23) (3.87) (3.56) (3.31) (3.11) (2.94) 1 1.049 678 466 374 320 284 257 237 220 207 195 (25.4) (26.645) (19.19) (13.19) (10.59) (9.06) (8.04) (7.27) (6.71) (6.23) (5.86) (5.52) 1-1/4 1.380 1350 957 768 657 583 528 486 452 424 400 (31.75) (35.052) (38.22) (27.09) (22.25) (18.60) (16.50) (14.95) (13.76) (12.79) (12.00) (11.33) 1-1/2 1.610 2090 1430 1150 985 873 791 728 677 635 600 (38.1) (40.894) (59.18) (40.49) (32.56) (27.89) (24.72) (22.39) (20.61) (19.17) (17.98) (17.00) 2 2.067 4020 2760 2220 1900 1680 1520 1400 1300 1220 1160 (50.8) (52.502) (113.83) (78.15) (62.86) (53.80) (47.57) (43.04) (39.64) (36.81) (34.55) (32.844) 2-1/2 2.469 6400 4400 3530 3020 2680 2480 2230 2080 1950 1840 (63.5) (67.713) (181.22) (124.59) (99.95) (85.51) (75.88) (70.22) (63.14) (58.89) (55.22) (52.10) NOTE- Capacity given in cubic feet(m3) of gas per hour and based on 0.60 specific gravity gas. Page 21 Left Side Piping (Standard) MANUAL MANUAL AUTOMATIC v1AIN SHUT-OFF MAIN SHUT-OFF GAS VALVE VALVE VALVE AUTOMATIC (With 1/8 in.NPT (With 1/8 in,NPT GAS VALVE �� PI Shown)Tapugged Plugged Tap Shown) GROUND ii JOINT — - UNION i _ GROUND = JOINT L _ �= R UNION \DRIP LEG I • FIELD '' Right Side Piping 4FIELD PROVIDED (Alternate) DRIP LEG AND INSTALLED NOTE-BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET FIGURE 26 Horizontal Applications Possible Gas Piping Configurations MANUAL MAIN SHUT-OFF.. 7. VALVE MANUAL - Horizontal Application MAIN SHUT-OFF PP VALVE -' GROUND ' Left-Side Air Discharge JOINT 111 I , UNION GROUND JOINT 1111 a , �► UNION DRIP LEG DRIP LEG ---P. Ill I I oil I I Ii 11 III ��' I MANUAL I MAIN SHUT-OFF t/ VALVE uJ' FIELD - PROVIDED GROUND AND JOINT INSTALLED =___ UNION Horizontal Application NOTE-BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET �� Right-Side Air Discharge DRIP LEG FIGURE 27 Page 22 Leak Check A WARNING After gas piping is completed, carefully check all piping connections (factory- and field-installed) for gas leaks. Fire Hazard. Use of aluminum wire with this product Use a leak detecting solution or other preferred means. may result in a fire, causing property damage, NOTE - If emergency shutoff is necessary, shut off the severe injury or death. Use copper wire only with main manual gas valve and disconnect the main power this product. to the furnace. The installer should properly label these devices. A CAUTION ACAUTION Failure to use properly sized wiring and circuit breaker may result in property damage. Size wiring Some soaps used for leak detection are corrosive and circuit breaker(s) per Product Specifications to certain metals. Carefully rinse piping thoroughly bulletin (EHB) and unit rating plate. after leak test has been completed. Do not use matches, candles,flame or other sources of ignition The unit is equipped with a field make-up box on the left to check for gas leaks. and side of the cabinet. The make-up box may be moved to the right side of the furnace to facilitate installation. If The furnace must be isolated by closing its individual man- the make-up box is moved to the right side, clip the wire ual shut-off valve and disconnecting from from the gas ties that bundle the wires together. The excess wire must supply system the during any pressure testing of the gas be pulled into the blower compartment. Secure the excess supply system at pressures greater than 1/2 psig (3.48 wire to the existing harness to protect it from damage. kPa, 14 inches w.c.). A IMPORTANT INTERIOR MAKE-UP BOX INSTALLATION When testing pressure of gas lines, gas valve must be disconnected and isolated. See figure 28. Gas Right Side valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa, 14 inches w.c.). ° BOX '�---- ' .-- MANUAL MAIN I ISOLATE 1I SHUT-OFF VALVE I:) GAS VALVE WILL NOT HOLD NORMAL TEST _ FURNACE PRESSURE Mg I 1___ APS 1/8 NPT PLUG. ' CAP FIGURE 28 FIGURE 29 Electrical Refer to figure 30 for schematic wiring diagram and trou- bleshooting and table 7 and figure 30 for field wiring. ELECTROSTATIC DISCHARGE (ESD) The power supply wiring must meet Class I restrictions. Precautions and Procedures Protected by either a fuse or circuit breaker, select circuit protection and wire size according to unit nameplate. ACAUTION NOTE - Unit nameplate states maximum current draw. Electrostatic discharge can affect Maximum over-current protection allowed is 15 AMP. I electronic components.Take precautions Holes are on both sides of the furnace cabinet to facilitate to neutralize electrostatic charge by wiring. touching your hand and tools to metal Install a separate (properly sized) disconnect switch near prior to handling the control. the furnace so that power can be turned off for servicing. Before connecting the thermostat, check to make sure AWARNING the wires will be long enough for servicing at a later date. Make sure that thermostat wire is long enough to facilitate Electric Shock Hazard. Can cause injury future removal of blower for service. or death. Unit must be properly grounded far in accordance with national and local codes. Page 23 Complete the wiring connections to the equipment. Use Generator Use -Voltage Requirements the provided unit wiring diagram and the field wiring dia The following requirements must be kept in mind when gram shown in figure 30. Use 18-gauge wire or larger that is suitable for Class II rating for thermostat connections. specifying a generator for use with this equipment: Electrically ground the unit according to local codes or, in ' The furnace requires 120 volts+ 10%(Range: 108 volts the absence of local codes, according to the current Na- to 132 volts). tional Electric Code (ANSI/NFPA No. 70).A green ground • The furnace operates at 60 Hz + 5% (Range: 57 Hz to wire is provided in the field make-up box. 63 Hz). NOTE - The EL280UH(X)E furnace contains electronic • The furnace integrated control requires both polarity components that are polarity sensitive. Make sure that the and proper ground. Both polarity and proper grounding furnace is wired correctly and is properly grounded. should be checked before attempting to operate the fur- Accessory Terminals nace on either permanent or temporary power. One line voltage"EAC" 1/4"spade terminal is provided on ' Generator should have a wave form distortion of less the furnace integrated control. See figure 31 for integrated than 5%total harmonic distortion (THD). control configuration. This terminal is energized when the Thermostat indoor blower is operating.Any accessory rated up to one Install the room thermostat according to the instructions amp can be connected to this terminal with the neutral leg provided with the thermostat. See table 7 for thermostat of the circuit being connected to one of the provided neu- designations. If the furnace is being matched with a heat tral terminals. If an accessory rated at greater than one amp is connected to this terminal, it is necessary to use pump,fuel thermostat the installation instructions. instruction or appropriate dual the an external relay. One line voltage "HUM" 1/4" spade terminal is provided Indoor Blower Speeds on the furnace integrated control. See figure 31 for inte- 1 - When the thermostat is set to"FAN ON,"the indoor grated control configuration. This terminal is energized blower will run continuously on the low speed when in the heating mode when the combustion air inducer is there is no cooling or heating demand. See TABLE operating.Any humidifier rated up to one amp can be con- 16 for allowable circulation speeds. nected to this terminal with the neutral leg of the circuit 2-When the EL280UH(X)E is operating in the high-fire being connected to one of the provided neutral terminals. or low-fire heating mode, the indoor blower will run If a humidifier rated at greater than one amp is connected on the corresponding heating speed. to this terminal, it is necessary to use an external relay. 3-When the EL280UH(X)E is operating in the low cool or the high cool cooling mode, the indoor blower will run on the corresponding cooling speed. Page 24 TABLE 7 Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections Heating System Options Stages 1 Heat/ 1 Cool ON Si FURNACE OUTDOOR NOTE- Use DIP T'STAT TERM.STRIP UNIT switch 2 to set EfETf second-stage TR s Wg91q5N heat ON delay. DO NOT CUT ANY eaSNE ---__® OFF-7 minutes. ON-BOARD LINKS a — — — --0 ON-12 minutes. o-- ; / yl 1 0—---—0 HAR NY, o---- Y ----0 f # + t,_ qp-----Q------0 O° 1 Heat/2 Cool ON S1 FURNACE OUTDOOR NOTE- Use DIP ` d _. -�- T'STAT TERM.STRIP UNIT switch 2 to set S • E •qEN second-stage "O= c$MPRE heat ON delay. CUT ON-BOARD LINK . $ 0-----& OFF-7 minutes. w915 6 R R —* — R 2 STAGE , 0----� — 4) ON-12 minutes. COMPR n N 0-----0 HA NY m m a) et) 0---- a ---- 0 1 Heat/2 Cool ON CUT ON-BOARD LINK S1 FURNACE OUTDOOR with t'stat with W915 1 T'STAT TERM.STRIP UNIT humidity control 2 STAGE aA N 1 ®- COMPR S N NOTE- Use DIP 0.6.`p aTINE { switch 2 to set second-stage — a * heat ON delay. ®� ---0 CUT ON-BOARD LINK Hu1i ®— OFF-7 minutes. wsla `i Nr ON-12 minutes. DEHUM r�0 0 — OR C! o I ED m @ ® --0 HARMONY --0 0 Not required on all units. Page 25 TABLE 7 Field Wiring Applications With Conventional Thermostat(Continued) DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat System Options Wiring Connections Heating Stages 2 Heat/2 Cool OFF Si FURNACE OUTDOOR TSTAT TERM.STRIP UNIT CUT ON-BOARD LINK I'W915 qti V' 2 STAGE `.•T qZ. I ®----� COMPR �4 ~ EVg9Ttp5� O1� 2COXPR li :I ; I 0-----0--t--0 o-----0 CD ® m CD ©---- ---- 8 0 2 Heat/2 Cool OFF Si FURNACE OUTDOOR with t'stat with CUT ON-BOARD LINK TSTAT TERM.STRIP UNIT humidity control °91S • ,1 2 STAGE 1 ---.----, r 11 Cr COMPR yp I' �' 0 0—*--0 CUT ON-BOARD LINK , ' I -0 W914 SIP ...<J..t 0 0 ---rV DEHUM Mar* HARMOR ONY IITAISI® o- _� --0 © -0----0 0 2 Heat/ 1 Cool OFF S7 FURNACE OUTDOOR with t'stat with TSTAT TERM.STRIP UNIT humidity control RI i' I _..2„` I - CUT ON-BOARD LINK I DEHUM ® l"J ——0 OR 2 0— —0HARMONY r��j 7 © © — ,., '14' .+, © —©----0 0 2 Heat/1 Cool OFF ! S7 FURNACE OUTDOOR I TSTAT TERM.STRIP UNIT SELF .N ®-----fa DO NOT CUT ANY `- 2 { ON-BOARD LINKS --- / 0-----0--'--0 / CD—----0 9 NRISWY 0-----o-----0 I'+'J'+'I'+'J'+' I 0-----t ----0 0 'Not required on all units. Page 26 TABLE 7 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links DIP Switch 1 Thermostat Thermostat On Board Links Must Be Cut To Select Wiring Connections Heating System Options Stages Dual Fuel FURNACE HEAT PUMP Single Stage OFF T'STAT TERM.STRIP Heat Pump i s .i.N ————®----4) ComfortSense CUT ON-BOARD ARD LINK '^1 i 3 ,.„------ R— ® 67M41' HEAT cy-* thermostat w/ PUMP s 0 dual fuel capa- bilities — at �i, 0 — °�---- Capable of 2 " HA Y stage gas heat @, — ©-----0 control IEDITIels O° O° ®° © 0 Qoutdoor 0— — sensor Dual Fuel T'STAT FURNACE TERM.STRIP HEAT PUMP Two Stage OFF CUT ON-BOARD LINK - ---F--- ®-----® -----0 Heat Pump W915 TI O 2 STAGE ComfortSense COMPR ►sty' al*j ® (a 67M41* thermostat w/ �� j Q °�+Y —'© dual fuel capa- j,.01 „fi'. o o -- o bI hies CUT ON-BOARD LINK. , , O — © —0 Capable of 2 HEAT MAR 8-----8 stage gas heat PUMP control 111011111181111 O O —0 ® ® rs ® © out blue ©----- 0 ----® O senor 0— sensor Connect W1 to W1 ONLY if using defrost tempering kit 67M41 NOTE-Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the furnace integrated control. Page 27 TABLE 7 Field Wiring Applications With Conventional Thermostat(Continued) DIP Switch Settings and On-Board Links DIP Switch 1 Thermostat Thermostat On Board Links Must Be Cut To Select Wiring Connections Heating System Options Stages Dual Fuel FURNACE HEAT PUMP Single Stage OFF r T'STAT TERM.STRIP Heat Pump YEA N ----®-----0 CUT ON-BOARD LINK v isf ComfortSense W951 '— zLG_0— ® 67M41" thermostat w/ HEAT dual fuel PUMP frr. o_ !(. © o���® capa- bilities ®° 0 ----O Capable of 2 CUT ON-BOARD LINK reel 21Y 1 © —0 stage gas heat DEHUM o- ©-----0 control w/dehu- OR r> <) I m m midification HARMONY control D o O ooutdoor —sensor Dual Fuel T'STAT FURNACE HEAT PUMP Two Stage OFF CUT ON-BOARD LINK TERM.STRIP Heat Pump 2 sTACE ---''` sy '",-- ®— ®-----o COMPR 'At WAS I ComfortSense "�=� VITAE I ® 67M41 thermostat w/ CUT ONyBOARD LIN 951 c ® o>ro.® dual fuel caps- HEAT !� 1, 'I'' bilities PUMP Alp ��}}^, 0 0 ----0 Capable of 2 CUT ON-BOARD LINK .;mei HII N © —0 stage gas heat ©DEHUM OR control w/dehu- + + ® -0 midification HARMONY 0 O o ® Y2 © ©2 ---out blue 0 0-----0 0 outdoor 0— —sensor * Connect W1 to W1 ONLY if using defrost tempering kit 67M41 NOTE-Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the furnace integrated control. Page 28 EL280UH(X)E Schematic Wiring Diagram 19NACC G 31x OF USEDI t PRIMARYgo COMBUSTION OR CO VALVE 1? BURNERS MO `• SIOR mN ® 01Q0 0 0 0 SURE L1— • QJ EASE Asa T SIM ®ROLLOUT FLEE IGNITOR U15B RFLAME OLLOUT LPROW HEAT ESSURE B SWITCH SENSOR P159 SWITCH SWITCH I -1 2NAC JPCKPLUG CHART HUMIDIFIER I —SEC HUMVE pSp IHUMIDIFER �10 RORHON CS1000 J. IS 0IICWPI UGINDGORBLOWERFGWER 11�� T JA K?LUGVNDCOR BLOWERSPD TAP L� ���J LIMIT HUM J 8 JACWPLUGBURHER CONTROL fl SEVEN 41 al �L AT EC J,PB4 TAME UGCOMB AIR INDUCER 90020 SI RROON THERRM1OSSTAAT....1 SIP IO HUM POT SEGMENT NEUTRALS TRANSFORMER CO10VPC J P3 JAWPLUGINJUCLHIICNNER I(w 0 G R LL 0el 12 3 4 5 uq INTEGRATED a a �� I WJMIOFIER �-► HUM-TO L1 1,P150 JACNNLUGIGNRION T T `r T`�' Yi I ppp I I I I I I �g�' DIAGNOSTIC CONTROL 8IFc II u3 USED ON w AND 1 HP ONLY Y M Q GLENNECVT W814 JUMPER LABELED DEHUM pp SWITCH FACTORY DEFAULT LS FOR PTWO I I I I I LL --' S ON I . - , FROM 09 TO R.ATA03 CONTROL BOPRO, STAGE THERMOSTAT { WHEN USED WITH Cw lorLSome® I I I I L—- - y _-- I WO3 THERMOSTAT FIELD SCREWED ACC WIRE I I L "--- - F --1 I C39 a GUT WS3I JUMPER FROM 0 TO R.JBELED USE LOPPE0.CONDUCTORS ONLY -J/�I I �l I I I J CIROTCH ' 1'E13 - HEAT PUMP,ATA ELAPPUGL KART.WHEN pH AND L TERMINALS ARE NOT USED. DO BREAKER POWER Ir USED FOR DUN.FUEL APPUCATION5 L J1 I I1 I II I I DOOAS CHOKE[ ] ° FCUT ROMVISJUMPERLASFLET•25TAGENUSEA.' AL MODELS DO NOT SE RED NSF YYELLOW TAP FOR SPEED TAP GH HEAT PM r -_-�J,, I I FROM VI TO YR ATA93 CONTROL WHEN USED FOR HIGH HEAT ON 070XE358 OR 0000EABC OUTDOOR I r -J I I I I I I oQOe WITH A35TAGE COG.T{ERM09TAT. MODELS. T1! I 1 rr —-. 1 I 1 I I I I ©cook THERMOSTAT NEATANTCIPATION SETTING SI ROOM THERMOSTAT I I EI5ANP HONEYWELL VALVE HEATCO0. YO J I I I I I I I ® ; TWO STAGE IO ryA1� L ` —� f3 AMP WHITE RCGGERS VALVE R O L —J T T 4a NOTE'SEE INSTALLATION INSTRUCTIONS FOR PROCEDURE 1 QOQ YOO'T PIS TO SET CORRECT BLOWER SPEED FOR SPECIFIC COOLING /g FqN TERMINAL BOARD TB1 INDOOR TONNAGE BEING APPLIED,AND HEATING TEMPERATURE • I• • MTV RREDESIRED. HEAT COO •• • TYPICAL SYSTEM SHOWN FOR 2 HEATS COOL WITH P. 2 3 CONVENTIONAL THERMOSTAT.SEE INSTALLATION T2 COD •0 0 INSTRUCTIONS FOR CONNECTORS TO OTHER EQUIPMENT AND ACCESSORIES 951 TO • R •JUJU1 ®Q Lev'0 DOOR INTEGRATED CONTROL INTERLOC Lle - LINE L1 I 1A�V C a'COZY WD15 3.g b+ �a � " I Wg14 {1J v J1kaLka8 1 2 311 v `' 3 3 IRA+ I w E V 2 • W 11TSIi m I Cly= i 13 E �µ n3 Kt K11 S.wn I j i �'SI (2)SE L r J • • �Q W GUI O 6 [ m PJ yJ GA9 % 6" SEE BLOWER SPEED CLAiT J3 J3 1 pVM_VE L 'yl` 'E•'y 'y (C9B HI $= aH J13s `- 3 I BLOWER SPEED CHART t C Z L W XI HI LOW LOW m 3 m w N p J d �I1I�3�131�IAI�_�I5I� MODEL COOL HEAT COOL HEAT PAW( PSI PIE g W4,WWW 045-30 BLACK YELLOW BLUE RED BROWN AN g 1 J159 4 ; '• �/ t '¢ RH II - ® BLACK YELLOW BLUE RED BROWN B6 442 ZZ :0,10.: BLACK BRO'NN BLUE YELLOW PEO iI o ACC RTI r w -00 BLACK YELLOW BLUE RED BROWN S m 43 BLACK BROWTI BLUE YELLOW RED J135 WA 1 JI59 0 P1M MI 84 Pt59F BROWN YELLOW BLUE RED BLACK PSI:3 /K AIS AAPFS W1BLACK) I— a3! P3� BUCK\\f//\\L< 18 CHYLE / BLGAER IIMEGATEC LENNOX HEATING UNITS-GAS wor G`C MOTOR CO TROL EL280UH045E38A EL280UHDROXE489 N EL280UH0Y0E36A EL280UH110E48C SE ER0 N ©A al el 0 J EL280UH070XE36A EL28UU1-1110E00C EL280UH090E36B EL280UH110XE60C A THECNIPNENT 88 G EL280UH090E4 WARNING. GROUND ELECTRIC SNOOK .G CAUSEINERT W IRY 2 HEATS COOL OR DEATH UNIT MOSTEST RE BE GROUNDED IN ACCORDANCE s.wmex WITH NATON4 AND LOCAL CODES. LYE VOLTAGEGFIE FIED LD ID —CLASS II VOLTAGE WIRINGFIEI➢ ti•1µ�y} Eorm No, NOTE. �•j� 3 p 1 MUST E REPLACED WITH WIRE OF IF ANY WIRE IN THIS APPLENCE IS LIRESEE,•IT —DEINOTE90PTpIYL COMPONENTS !'•A SJSOZV—O I RATING,INSULATKJR THICKNESS,AND TERMINATION Oxoll LYn New FIGURE 30 Page 29 Integrated Control HUM ACC 24VAC Indoor Blower Terminals Ignitor and Combustion 1� I Air Inducer Ill l I l I 18 I III D0000 0 0 0 0 ) Neutrals ( i o00o I I' ID CID 0 CIO H El Flame Sense I I 11 aH oH aU a ______ _ ono a up ■o ■=JI ::i 00B I ( I [lilac 0 0 II) ..0 1`_in_ LED �Ll noir IC-Ix-v o 0 0 S4 DIP Switches---___-_.- SI -o i � 0 0 = Do l uzs o0oBol 1I Diagnostic Push Do Button TCli (1 O O o ® o o D o 000o D000 �) o Duo OM@Goo I o ❑ fl 0 E um� D0 00 0 eomoo On Board Links O CIO O OOI=1O ID( CIOO O ) JJ OOOO nnnnnnnnnn e uu►luurl 611 boil Ira Iril limil V 1-1_,-1 n 62 6 rt II f 1 Cl ON L 0 0$ I --- 11 3/16"QUICK CONNECT TERMINALS THERMOSTAT CONNECTIONS (TB1) FLAME SENSE SIGNAL DS=DEHUMIDIFICATION SIGNAL HI Cool 24VAC W2=HEAT DEMAND FROM 2ND STAGE T/STAT HI HEAT 24VAC W1 =HEAT DEMAND FROM 1ST STAGE T/STAT LO COOL 24VAC R=CLASS 2 VOLTAGE TO THERMOSTAT G=MANUAL FAN FROM T'STAT LO HEAT 24VAC C=THERMOSTAT SIGNAL GROUND CONNECTED TO PARK TRANSFORMER GRD(TR)&CHASIS GROUND(GRD) PARK Y1 =THERMOSTAT 1ST STAGE COOL SIGNAL COMMON 24VAC Y2=THERMOSTAT 2ND STAGE COOL SIGNAL 1/4"QUICK CONNECT TERMINALS NEUTRALS = 120 VAC NEUTRAL O=THERMOSTAT SIGNAL TO HEAT PUMP HUM=UNPOWERED NORMALLY OPEN(DRY)CONTACTS REVERSING VALVE LI=120 VAC INPUT TO CONTROL DH=NOT USED ACC=120 VAC OUTPUT TO OPTIONAL ACCESSORY L=NOT USED FIGURE 31 Page 30 Integrated Control DIP Switch Settings The blower off delay affects comfort and is adjustable to satisfy individual applications. Adjust the blower off de- EL280UH(X)E units are equipped with a two-stage inte- lay to achieve a supply air temperature between 90° and grated control. This control manages ignition timing, heat- 110°F at the exact moment that the blower is de-ener- ing mode fan off delays and indoor blower speeds based gized. Longer off delay settings provide lower supply air on selections made using the control dip switches and temperatures; shorter settings provide higher supply air jumpers.The control includes an internal watchguard fea- temperatures.Table 8 provides the blower off timings that ture which automatically resets the ignition control when will result from different switch settings. it has been locked out.After one hour of continuous ther- mostat demand for heat, the watchguard will break and TABLE 8 remake thermostat demand to the furnace and automati- Blower Off Heating Mode Delay Switch Settings cally reset the control to relight the furnace. Blower Off Delay Heating Operation DIP Switch Settings Seconds Switch 3 Switch 4 Switch 1 -- Thermostat Selection -- This unit may be 60 On Off used with either a single-stage or two-stage thermostat. 90(factory) Off Off The thermostat selection is made using a DIP switch 120 Off On which must be properly positioned for the particular appli- 180 On On cation. The DIP switch is factory-positioned for use with a twostage thermostat. If a single-stage thermostat is to be used, the DIP switch must be repositioned. Switch 5 -- Cooling Mode Blower-Off Delay-- The unit a. Select"OFF"for two-stage heating operation controlled by a is shipped from the factory with the dip switch positioned two-stage heating thermostat(factory setting); OFF for a 45 second delay. Table 9 provides the cooling b. Select "ON" for two-stage heating operation controlled by mode off delay settings. a single-stage heating thermostat. This setting provides a TABLE 9 timed delay before second-stage heat is initiated. Blower Off Cooling Mode Delay Switch Settings Switch 2 --Second Stage Delay(Used with Single- Blower Off Delay Seconds Switch 5 Stage Thermostat Only) --This switch is used to deter- 45(factory) Off mine the second stage on delay when a single-stage ther- 2 On mostat is being used.The switch is factory-set in the OFF position, which provides a 7-minute delay before second- stage heat is initiated. If the switch is toggled to the ON Switches 6 and 7 -- Continuous Fan Mode -- Continu- position, it will provide a 12-minute delay before second- stage fan speed can be controlled by changing DIP switch stage heat is initiated. This switch is only activated when Positions.Table 12 below provides DIP switch settings for the thermostat selector jumper is positioned for SINGLE- continuous fan mode. stage thermostat use. TABLE 10 Indoor Blower Operation DIP Switch Settings Continuous Fan Mode Settings Switches 3 and 4 -- Heating Mode Blower-Off Delay — Continuous Fan Switch 6 Switch 7 The blower-on delay of 30 seconds is not adjustable.The Mode blower-off delay (time that the blower operates after the Low Heat SpeedOff Off heating demand has been satisfied) can be adjusted by (Factory Setting) moving switches 3 and 4 on the integrated control. The unit is shipped from the factory with a blower-off delay of 90 seconds. Page 31 On-Board Links and Diagnostic Push A WARNING Button (Figure 31) If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance A WARNING before shutting off electrical supply. Carefully review all configuration information provided. Failure to properly set DIP switches, A CAUTION jumpers and on-board links can result in improper operation! Before attempting to perform any service or maintenance, turn the electrical power to unit OFF On-Board Link W914 Dehum at disconnect switch. On-board link W914, is a clippable connection between BEFORE LIGHTING smell all around the appliance area terminals R and DS on the integrated control. W914 must for gas. Be sure to smell next to the floor because some be cut when the furnace is installed with a thermostat gas is heavier than air and will settle on the floor. which features humidity control. If the link is not cut, termi- nal "DS" will remain energized not allowing the blower to The gas valve on the EL280UHE unit will be equipped reduce to low cool speed upon a call for dehumidification- with a gas control switch. Use only your hand to move the On-Board Link W951 Heat Pump (R to 0) switch. Never use tools. If the switch will not turn or if the On-board link W951 is a clippable connection between control switch will not move by hand, do not try to repair it. terminals R and 0 on the integrated control. W951 must Placing the furnace into operation: be cut when the furnace is installed in applications which EL280UHE units are equipped with an automatic ignition include a heat pump unit and a thermostat which features system. Do not attempt to manually light burners on these dual fuel use. If the link is left intact, terminal "O" will re- furnaces. Each time the thermostat calls for heat, the main energized eliminating the HEAT MODE in the heat burners will automatically light. The ignitor does not get pump.On-Board Link W915 2 Stage Compr(Y1 to Y2) hot when there is no call for heat on units with an automat- On-board link W915 is a clippable connection between is ignition system. terminals Y1 and Y2 on the integrated control. W915 must A WARNING be cut if two-stage cooling will be used. If the Y1 to Y2 link is not cut the outdoor unit will operate in second-stage If you do not follow these instructions exactly, a fire cooling only. or explosion may result causing property damage, Diagnostic Push Button personal injury or death. The diagnostic push button is located adjacent to the sev- Gas Valve Operation (Figure 32) en-segment diagnostic LED.This button is used to enable the Error Code Recall "E" mode and the Flame Signal 1 - STOP! Read the safety information at the beginning "F" mode. Press the button and hold it to cycle through a of this section. menu of options. Every five seconds a new menu item will 2- Set the thermostat to the lowest setting. be displayed. When the button is released, the displayed 3-Turn off all electrical power to the unit. item will be selected. Once all items in the menu have 4-This furnace is equipped with an ignition device been displayed, the menu resumes from the beginning which automatically lights the burners. Do not try to until the button is released. light the burners by hand. Unit Start-Up 5- Remove the upper access panel. FOR YOUR SAFETY READ BEFORE LIGHTING 6- Move switch on gas valve to OFF. Do not force. See figure 32. AWARNING 7 -Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier Do not use this furnace if any part has been from a neighbor's phone. Follow the gas supplier's underwater. A flood-damaged furnace is extremely instructions. dangerous.Attempts to use the furnace can result in 8 - Move switch on gas valve to ON. Do not force. See fire or explosion.Immediately call a qualified service figure 32. technician to inspect the furnace and to replace all 9- Replace the upper access panel. gas controls, control system parts, and electrical parts that have been wet or to replace the furnace, if deemed necessary. Page 32 WHITE RODGERS GAS VALVE Gas Pressure Adjustment HIGH FIRE LOW FIRE Gas Flow(Approximate) MANIFOLD ADJUSTMENT ADJUSTMENT PRESSURE TAP (under cap) (under cap) TABLE 11 GAS METER CLOCKING CHART i/. \° 'i�� Seconds for One Revolution :- ® Unit Natural LP . �VI) Input 1 Cu ft 2 Cu ft 1 Cu ft 2 Cu ft �,;1 Dial Dial Dial Dial _ 0 -045 80 160 200 400 e ® LI . _ INLET PRESSURE POST -070 55 110 136 272 -090 41 82 102 204 GAS VALVE SHOWN IN ON POSITION -110 33 66 82 164 FIGURE 32 Natural-1000 btu/cu ft LP-2500 btu/cu ft 10-Turn on all electrical power to to the unit. Furnace should operate at least 5 minutes before check- 11-Set the thermostat to desired setting. ing gas flow. Determine time in seconds for two revolu- tions of gas through the meter. (Two revolutions assures NOTE-When unit is initially started, steps 1 through a more accurate time.)Divide by two and compare to time 11 may need to be repeated to purge air from gas in table 11 below. If manifold pressure matches table 13 line. and rate is incorrect,check gas orifices for proper size and 12- If the appliance will not operate, follow the restriction. Remove temporary gas meter if installed. instructions "Turning Off Gas to Unit" and call your NOTE- To obtain accurate reading, shut off all other gas service technician or gas supplier. appliances connected to meter. Turning Off Gas to Unit Supply Pressure Measurement I 1 - Set the thermostat to the lowest setting. An inlet post located on the gas valve provides access 2-Turn off all electrical power to the unit if service is to to the supply pressure. See figure 32. Back out the 3/32" be performed. hex screw one turn, connect a piece of 5/16" tubing and connect to a manometer to measure supply pressure.See 3- Remove the upper access panel. table 13 for supply line pressure. 4- Move switch on gas valve to OFF. Do not force. Manifold Pressure 5- Replace the upper access panel. A manifold pressure tap located on the gas valve provides Failure To Operate access to the manifold pressure. See figure 32. Back out If the unit fails to operate, check the following: the 3/32 hex screw one turn, connect a piece of 5/16" tubing and connect to a manometer to measure manifold 1 - Is the thermostat calling for heat? pressure. 2 -Are access panels securely in place? NOTE-Pressure test adapter kit(10L34)is available from 3 - Is the main disconnect switch closed? Lennox to facilitate manifold pressure measurement. 4 - Is there a blown fuse or tripped circuit breaker? 1 - Connect test gauge to manifold pressure tap(figure 5 - Is the filter dirty or plugged? Dirty or plugged filters 32)gas valve. will cause the limit control to shut the unit off. 2- Ignite unit on low fire and let run for 5 minutes to 6 Is gas turned on at the meter? allow for steady state conditions. 7 - Is the manual main shut-off valve open? 3 -After allowing unit to stabilize for 5 minutes, record manifold pressure and compare to value given in 8 - Is the gas valve ON/OFF switch in the ON position? table 13. 9 - Is the unit ignition system in lock out? If the unit locks 4 - If necessary, make adjustments. Figure 32 shows out again, call the service technician to inspect the location of high fire and low fire adjustment screw. unit for blockages. 5- Repeat steps 2, 3 and 4 on high fire. 10- Is pressure switch closed? Obstructed flue will 6 -Shut unit off and remove manometer as soon as an cause unit to shut off at pressure switch. Check flue accurate reading has been obtained.Turn the supply and outlet for blockages. and manifold 3/32" hex screw one revolution back 11 -Are flame rollout switches tripped? If flame rollout into the gas valve. switches are tripped, call the service technician for 7 -Start unit and check for gas leaks. Seal if any found. inspection. Page 33 Proper Combustion High Altitude The manifold pressure may require adjustment and corn- Furnace should operate minimum 15 minutes with correct bustion air pressure switch may need replacing to ensure manifold pressure and gas flow rate before checking corn- proper combustion at higher altitudes. Refer to table 13 bustion. Table 12 shows acceptable combustion for ALL for manifold pressure and table 14 for pressure switch EL280UHE models. The maximum carbon monoxide change and gas conversion kits. reading should not exceed 100 ppm TABLE 12 Firing Rate CO2% For Nat CO2% For L.P. High Fire 6.0-7.5 7.0-8.5 Low Fire 5.0 -6.5 5.8-7.3 TABLE 13 Manifold Pressure Settings Manifold Pressure in. Manifold Pressure in. Manifold Pressure in. wg. Supply Line Unit Gas wg. 0 -4500 ft wg.4500 -7500 ft 7500- 10,000 ft2 Pressure Input in. w.g. Low Firer High Fire Low Fire High Fire Low Fire High Fire Min Max Natural 1.7 3.5 1.5 3.2 1.7 3.5 4.5 13.0 045 LP/propane 3 4.5 10.0 4.5 10.0 4.5 10.0 11.0 13.0 070 Natural 1.7 3.5 1.6 3.4 1.7 3.5 4.5 13.0 LP/propane3 4.5 10.0 4.5 10.0 4.5 10.5 11.0 13.0 090 Natuarl 1.7 3.5 1.5 3.2 1.7 3.5 4.5 13.0 LP/propane 3 4.5 10.0 4.5 10.0 4.5 10.0 11.0 13.0 110 Natural 1.7 3.5 1.5 2.8 1.7 3.5 4.5 13.0 LP/propane 3 4.5 10.0 4.5 10.0 4.5 10.0 11.0 13.0 1 This is the only permissible derate for these units. 2 Natural gas high altitude orifice kit required. 3 A natural to L.P.propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure. NOTE-Units may be installed at altitudes up to 4500 ft.above sea level without modifications. TABLE 14 Pressure Switch and Gas Conversion Kits at all Altitudes High Altitude Pressure Switch Kit High Altitude LP/Propane Gas Kit LP/Propane to Unit Input Natural Gas Kit Natural Kit 0-4500 ft 4501-7500 ft 7501-10,000 ft 7501-10,000 ft 0-7500 ft 7501 - 10,000 ft 0-7500 ft 045 91W53 73W35 070 91W53 73W35 No Change 73W37 11K51 11K46 77W09 090 91W53 73W35 110 91W53 73W35 NOTE-A natural to L.P.propane gas changeover kit is necessary to convert this unit.Refer to the changeover kit installation instruc- tion for the conversion procedure. Page 34 Other Unit Adjustments Heating Sequence of Operation Primary and Secondary Limits Electronic Ignition The primary limit is located on the heating compartment The two-stage, variable speed integrated control used in vestibule panel. The secondary limits (if equipped) are lo- EL280UH(X)E units has an added feature of an internal cated in the blower compartment, attached to the back Watchguard control. The feature serves as an automatic side of the blower. These auto reset limits are factory-set reset device for ignition control lockout caused by ignition and require no adjustment. failure. After one hour of continuous thermostat demand Flame Rollout Switches for heat, the Watchguard will break and remake thermo- stat demand to the furnace and automatically reset the This manually reset switches are located on the baffle control to begin the ignition sequence. plate in the burner assembly. NOTE - The ignition control thermostat selection DIP Pressure Switch switch is The pressure switch is located in the heating compartment factory-set in the "TWO-STAGE" position. adjacent to the combustion air inducer.The switch checks Applications Using a Two-Stage Thermostat for proper combustion air inducer operation before allow- ing ignition trial. The switch is factory-set and requires no A - Heating Sequence -- Integrated Control Thermo- adjustment. stat Selection DIP Switch 1 OFF in "Two-Stage" Posi- tion (Factory Setting) Temperature Rise 1 - On a call for heat, thermostat first-stage contacts After the furnace has been started, and supply and return close sending a signal to the integrated control.The air temperatures have been allowed to stabilize,check the integrated control runs a self-diagnostic program temperature rise. If necessary, adjust the blower speed to and checks high temperature limit switches for maintain the temperature rise within the range shown on normally closed contacts and pressure switches for the unit nameplate. See TABLE 15 for allowable heating normally open contacts.The combustion air inducer speeds.lncrease the blower speed to decrease the tem- is energized at low speed. perature. Decrease the blower speed to increase the tem- 2- Once the control receives a signal that the low perature rise. Failure to adjust the temperature rise may pressure switch has closed, the combustion air cause erratic limit operation. inducer begins a 15-second pre-purge in low speed. Electrical NOTE-If the low fire pressure switch does not close 1 - Check all wiring for loose connections. the combustion air inducer will switch to high fire. After a 15 second pre-purge the high fire pressure 2- Check for the correct voltage at the furnace (furnace switch will close and the unit will begin operation on operating). Correct voltage is 120VAC + 10%. high fire. After 10 to 20 seconds of high fire opera- 3-Check amp-draw on the blower motor with inner tion the unit will switch to low fire. blower panel in place. 3-After the pre-purge is complete, a 20-second initial Unit Nameplate Actual ignitor warm-up period begins. The combustion air Blower Speeds inducer continues to operate at low speed. 4-After the 20-second warm-up period has ended, the Follow the steps below to change the blower speeds. gas valve is energized on low fire (first stage) and 1 - Turn off electrical power to furnace. ignition occurs.At the same time, the control module 2- Remove blower access panel. sends a signal to begin an indoor blower 30-second 3- Disconnect existing speed tap at integrated control ON-delay. When the delay ends, the indoor blower speed terminal. motor is energized on the low fire heating speed, the HUM contacts close energizing the humidifier and NOTE - Termination of any unused motor leads 120V ACC terminal is energized. The furnace will must be insulated. continue this operation as long as the thermostat has 4- Place unused blower speed tap on integrated control a first-stage heating demand. "PARK"terminal or insulate. 5- If second-stage heat is required, the thermostat 5- Refer to blower speed selection chart on unit wiring second-stage heat contacts close and send a signal diagram for desired heating or cooling speed. See to the integrated control. The integrated control Blower performance data at the end of this manual initiates a 30-second second-stage recognition and TABLE 15 for allowable heating speeds. delay. 6-Connect selected speed tap at integrated control speed terminal. 7- Resecure blower access panel. 8-Turn on electrical power to furnace. 9 - Recheck temperature rise. Page 35 6 -At the end of the recognition delay, the integrated 2-Once the control receives a signal that the low control energizes the combustion air inducer at high pressure switch has closed, the combustion air speed.The control also checks the high fire (second inducer begins a 15-second pre-purge in low speed. stage) pressure switch to make sure it is closed.The NOTE-If the low fire pressure switch does not close high fire (second stage) gas valve is energized and the combustion air inducer will switch to high fire. the indoor blower motor is energized for operation at After a 15 second pre-purge the high fire pressure the high fire heating speed. switch will close and the unit will begin operation on 7- When the demand for high fire (second stage) heat high fire. After 10 to 20 seconds of high fire opera- is satisfied,the combustion air inducer is switched to Lion the unit will switch to low fire. the low-fire heating speed and the high-fire (second 3-After the pre-purge is complete, a 20-second initial stage) gas valve is de-energized. The low-fire (first ignitor warm-up period begins. The combustion air stage) gas valve continues operation. The indoor inducer continues to operate at low speed. blower motor is switched to the low-fire heating 4-After the 20-second warm-up period has ended, the speed. gas valve is energized on low fire (first stage) and 8-When the thermostat demand for low-fire(first stage) ignition occurs.At the same time, the control module heat is satisfied, the gas valve is de-energized and sends a signal to begin an indoor blower 30-second the field-selected indoor blower off delay begins. ON-delay. When the delay ends, the indoor blower The combustion air inducer begins a 5-second post- motor is energized on the low fire heating speed and purge period. the HUM contacts are energized. The integrated 9-When the combustion air post-purge period is control also initiates a second-stage on delay complete,the inducer and the HUM contacts are de- (factory-set at 7 minutes; adjustable to 12 minutes). energized. The indoor blower is de-energized at the 5- If the heating demand continues beyond the end of the off delay as well as the ACC terminals. secondstage on delay, the integrated control Applications Using A Single-Stage Thermostat energizes the combustion air inducer at high speed. The control also checks the high fire (second stage) B-Heating Sequence--Integrated Control Thermostat pressure switch to make sure it is closed. The high Selection DIP Switch 1 ON in "Single-Stage" Position fire (second stage) gas valve is energized and the NOTE- In these applications, two-stage heat will be initi- indoor blower motor is energized for operation at the ated by the integrated control if heating demand has not high fire heating speed. been satisfied after the field adjustable period (7 or 12 6-When the thermostat heating demand is satisfied, minutes). the combustion air inducer begins a 5-second low 1 - On a call for heat, thermostat first-stage contacts speed post-purge. The field-selected indoor blower close sending a signal to the integrated control.The off delay begins. The indoor blower operates at the integrated control runs a self-diagnostic program low-fire heating speed. and checks high temperature limit switches for 7-When the combustion air post-purge period is normally closed contacts and pressure switches for complete, the inducer and the HUM contacts are de- normally open contacts.The combustion air inducer energized. The indoor blower is de-energized at the is energized at low speed. end of the off delay as well as the 120 ACC terminals Page 36 Service 8- Evaluate the heat exchanger integrity by inspecting the heat exchanger per the AHRI heat exchanger inspection procedure. This procedure can be viewed AWARNING at www.ahrinet.org ELECTRICAL SHOCK, FIRE, 9- Ensure sufficient combustion air is available to the OR EXPLOSION HAZARD. furnace. Fresh air grilles and louvers (on the unit and Failure to follow safety warnings exactly could in the room where the furnace is installed) must be result in dangerous operation, serious injury, death properlysized, open and unobstructed to provide combustion air. or property damage. 10- Inspect the furnace venting system to make sure Improper servicing could result in dangerous it is in place, structurally sound, and without holes, operation,serious injury,death,or property damage. corrosion, or blockage. Vent system must be free Before servicing, disconnect all electrical power to and clear of obstructions and must slope upward furnace. away from the furnace . Vent system should be When servicing controls, label all wires prior installed per the National Fuel Gas Code. to disconnecting. Take care to reconnect wires 11- Inspect the furnace return air duct connection to correctly. ensure the duct is sealed to the furnace. Check for Verify proper operation after servicing. air leaks on supply and return ducts and seal where necessary. A WARNING 12-Check the condition of the furnace cabinet insulation and repair if necessary. The blower access panel must be securely in place 13- Perform a complete combustion analysis during the when the blower and burners are operating. Gas furnace inspection to ensure proper combustion fumes, which could contain carbon monoxide, can and operation. Consult Service Literature for proper be drawn into living space resulting in personal combustion values. injury or death. 14-Verify operation of CO detectors and replace Annual Furnace Maintenance batteries as required. Perform a general system test. Turn on the furnace to At the beginning of each heating season, and to comply check operating functions such as the start-up and shut- with the Lennox Limited Warranty, your system should be off operation. checked as follows: 1 - Check the operation of the ignition system, inspect 1 - Check wiring for loose connections, voltage at and clean flame sensor. Check microamps before indoor unit and amperage of indoor motor. and after. Check controls and safety devices (gas 2-Check the condition of the belt and shaft bearings if valve, flame sensor, temperature limits). Consult applicable. Service Manual for proper operating range.Thermal 3- Inspect all gas pipe and connections for leaks. Limits should be checked by restricting airflow and 4- Check the cleanliness of filters and change if not disconnecting the indoor blower. For additional necessary(monthly). details, please see Service and Application Note H049. 5- Check the condition and cleanliness of burners and 2-Verify that system total static pressure and airflow heat exchanger and clean if necessary. settings are within specific operating parameters. 6- Check the cleanliness of blower assembly and 3- Clock gas meter to ensure that the unit is operating clean the housing, blower wheel and blower motor if at the specified firing rate. Check the supply necessary. pressure and the manifold pressure. On two-stage 7- Inspect the combustion air inducer and clean if gas furnaces check the manifold pressure on high necessary. fire and low fire. If manifold pressure adjustment is necessary, consult the Service Literature for unit specific information on adjusting gas pressure. Not all gas valves are adjustable. Verify correct temperature rise. Page 37 Cleaning the Burners 4-To clean burners, run a vacuum cleaner with a soft NOTE- Use papers or protective covering in front of the brush attachment over the face of burners. Visually during cleaning. inspect inside the burners and crossovers for any furnacblockage caused by foreign matter. Remove any 1 - Turn off both electrical and gas power supplies to blockage. Figure 33 shows burner detail. furnace. 5- Reinstall burner box, manifold assembly and burner 2- Label the wires from gas valve, rollout switches, box cover. primary limit switch and make-up box then disconnect 6- Re-install gas supply and turn on electrical power to them. furnace. 3- Disconnect gas supply piping. Remove the screw securing the burner box cover and remove cover. Remove the four screws securing the burner manifold assembly to the vestibule panel and remove the assembly from the unit. Ignitor BURNER REMOVAL ivvvvitalet / 1. Rollout Retention Rings Switche Sensor ���; _ ,i ��� ��� ��� ��._ . li I� �,, Cross Over Manifold And Gas Valve Figure 33 Page 38 Repair Parts List The following repair parts are available through indepen- Heating Parts dent Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA Inter Flame sensor national nameplate -- Example: EL280UH45E36A-01. All Heat exchanger assembly service must be performed by a licensed professional Gas manifold HVAC installer (or equivalent), service agency, or gas Combustion air inducer supplier. Gas valve Main burner cluster Cabinet Parts Main burner orifices Main access panel Pressure switch Blower panel Ignitor Top cap Primary limit control Control Panel Parts Flame rollout switch (s) Transformer Secondary limit Integrated control Door interlock switch Circuit breake Blower Parts Blower wheel Blower housing Motor Motor mounting frame Motor capacitor Blower housing cutoff plate Page 39 Start-Up & Performance Check List UNIT SET UP (typical) Unit Model Number ° Serial Number SUPPLY 4 ' Line Voltage AIR � 1 ,1� up flow furnace shown 0 0 I.— Gas Supply Pressure I. Filter 0 /11.1 RETURN �4" ° AIR 4 0 GAS SUPPLY 0 DUCT SYSTEM ❑ Natural Gas ❑ LP/Propane Gas SUPPLY AIR DUCT ❑ Sealed ❑ Piping Connections Tight ❑ Leak Tested ❑ Insulated (if necessary) ❑ Supply Line Pressure" W.C. ❑ Registers Open and Unobstructed RETURN DUCT 0 VENT!EXHAUST PIPE ❑ Sealed ❑ Secure to Unit n Filter Installed and Clean ri Elbows Secured to Pipe ❑ Grilles Unobstructed ❑ Roof Flashing(water tight) O INTEGRATED CONTROL ❑ Vent Pipe Supported ❑ DIP Switches Set(if applicable) ❑ Appropriate Links in Place(if applicable) 0 VOLTAGE CHECK Supply Voltage ❑ Electrical Connections Tight Page 40 UNIT OPERATION (typical) Combustion CO2 ( 1 Q • SUPPLY 000 a Gas Manifold Pressure Q Thermostat Temperatures r 1 Qilikum_r upflow furnace shown O a = Filter Z-. � Blower Motor Amps J O1 - ilm Duct Static 3 RETURN O •, U .� AIR : ////////////////////// W/ J HEATING MODE COOLING MODE Oj GAS MANIFOLD PRESSURE"W.C. O INDOOR BLOWER AMPS 000MBUSTION SAMPLE CO2% CO PPM Q TEMPERATURE DROP Return Duct Temperature a Supply Duct Temperature - Q INDOOR BLOWER AMPS Temperature Drop = O TEMPERATURE RISE O TOTAL EXTERNAL STATIC(dry coil) Supply Duct Temperature Supply External Static Return Duct Temperature- Return External Static+ Total External Static= Temperature Rise = Q DRAIN LINE O TOTAL EXTERNAL STATIC(dry coil) Supply External Static ❑ Leak Free Return External Static+ Total External Static= Q THERMOSTAT ❑ Adjusted and Programmed ❑ Operation Explained to Owner Contractor's:Name Telephone Checklist Completed Job Address - Technician's Name Page 41 BLOWER DATA EL280UH045E36A PERFORMANCE(Less Filter) ExternalAir Volume/Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Low Pressure (Black) (Brown) (Blue) (Yellow) (Red) in.w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1500 300 1220 175 1050 114 850 65 800 48 0.10 1485 311 1200 179 1025 118 810 68 790 50 0.20 1460 323 1170 188 980 125 725 73 580 53 0.30 1420 334 1140 195 930 133 670 76 455 54 0.40 1395 343 1095 203 890 138 600 86 375 60 0.50 1355 355 1050 212 840 149 550 93 325 64 0.60 1325 368 1020 222 790 158 495 96 275 67 0.70 1290 369 980 228 745 164 420 103 238 69 0.80 1260 381 945 238 700 172 380 107 --- --- EL280UH070E36A PERFORMANCE(Less Filter) External Air Volume/Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Low Pressure (Black) (Brown) (Blue) (Yellow) (Red) in.w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1375 340 1350 240 1110 190 970 93 780 50 0.10 1350 346 1325 254 1100 194 940 104 725 57 0.20 1330 346 1310 264 1080 200 895 113 680 64 0.30 1315 353 1280 272 1060 204 860 118 610 70 0.40 1300 368 1250 283 1040 212 810 125 550 76 0.50 1285 369 1220 293 1010 222 765 132 510 78 0.60 1260 384 1190 301 975 227 725 140 460 83 0.70 1240 391 1150 314 950 236 680 147 400 89 0.80 1210 399 1120 319 915 244 640 152 355 95 EL280UH090E36B PERFORMANCE(Less Filter) External Air Volume/Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Low Pressure (Black) (Brown) (Blue) (Yellow) (Red) in.w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1605 313 1475 240 1320 173 1,050 99 865 60 0.10 1565 323 1430 251 1270 185 995 108 800 68 0.20 1515 334 1380 264 1225 196 935 115 730 76 0.30 1475 347 1340 275 1170 207 870 124 645 83 0.40 1435 360 1300 285 1120 215 805 133 550 91 0.50 1395 369 1250 295 1065 225 715 140 470 98 0.60 1355 378 1205 307 1010 235 655 147 395 101 0.70 1305 391 1160 318 935 246 560 156 345 107 0.80 1265 404 1105 329 875 254 510 162 300 112 Page 42 BLOWER DATA EL280UH090E48B PERFORMANCE (Less Filter) External Air Volume/Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Low Pressure (Black) (Brown) (Blue) (Yellow) (Red) in.w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1800 370 1555 260 1425 207 1370 172 1240 131 0.10 1765 381 1525 272 1390 218 1320 184 1190 144 0.20 1725 397 1485 283 1350 229 1255 195 1130 157 0.30 1685 416 1450 296 1310 241 1205 206 1075 165 0.40 1635 425 1390 312 1260 250 1165 217 1015 174 0.50 1600 438 1350 322 1205 263 1100 230 955 185 0.60 1560 453 1300 332 1140 270 1050 239 905 193 0.70 1520 467 1255 344 1110 284 1000 249 840 202 0.80 1470 474 1215 352 1050 294 935 258 765 211 EL280UH110E48C PERFORMANCE(Less Filter) External Air Volume/Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Low Pressure (Black) (Brown) (Blue) (Yellow) (Red) in.w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1780 349 1570 248 1465 190 1370 169 1250 131 0.10 1750 365 1540 260 1420 205 1330 177 1205 140 0.20 1720 382 1500 271 1365 220 1280 187 1155 150 0.30 1675 397 1460 279 1330 228 1250 197 1110 159 0.40 1645 407 1415 291 1290 241 1200 211 1070 166 0.50 1605 424 1395 307 1250 249 1165 219 1015 177 0.60 1580 432 1345 316 1205 258 1105 228 960 186 0.70 1565 448 1300 328 1165 271 1060 237 915 194 0.80 1525 449 1270 339 1125 283 1025 246 865 203 Page 43 EL280UH110E60C PERFORMANCE (Less Filter) Air Volume/Watts at Different Blower Speeds Bottom Return Air, Side Return Air from Both Sides or Single Side Return Air—Air volumes in bold(over External Return Air from Bottom and One Side. 1800 cfm)require Optional Return Air Base and field Static fabricated transition to accommodate 20 x 25 x 1 in.air Pressure filter in order to maintain proper air velocity. in.w.g. High Med-High Medium Med-Low Low High Med-High Medium Med-Low Low (Black) (Brown) (Blue) (Yellow) (Red) (Black) (Brown) (Blue) (Yellow) (Red) cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2175 590 2050 410 1850 310 1695 275 1510 195 2175 605 1930 420 1785 320 1675 260 1500 195 0.10 2158 607 1943 421 1778 328 1650 283 1461 205 2129 628 1892 441 1733 345 1627 288 1458 209 0.20 2131 620 1897 436 1719 345 1591 299 1405 215 2091 649 1838 458 1691 360 1586 297 1407 220 0.30 2085 639 1847 456 1678 354 1563 308 1351 228 2072 660 1806 471 1631 371 1529 313 1353 232 0.40 2055 652 1806 466 1641 371 1499 317 1297 238 2014 677 1772 485 1591 385 1485 327 1302 243 0.50 2030 668 1767 476 1588 387 1462 333 1256 254 1977 690 1742 498 1554 395 1444 337 1252 256 0.60 1976 686 1724 495 1550 399 1419 348 1215 265 1960 707 1696 511 1511 410 1412 348 1204 265 0.70 1949 700 1685 510 1512 408 1371 357 1168 271 1913 720 1661 525 1480 424 1351 359 1149 274 0.80 1896 716 1649 527 1473 419 1332 372 1121 287 1873 738 1617 538 1440 437 1313 371 1117 285 TABLE 15 Allowable Heating Speeds EL280UH Low Fire Heating Speeds High Fire Heating Speeds Model Number Red Yellow Blue Brown Black Red Yellow Blue Brown Black 045E36A Factory Allowed Setting Factory FactoryAllowed Allowed Setting 070E36A Setting Factory 090E36B Allowed Facto g Allowed Not Not Allowed Setting • Allowed Allowed 090E48B Factory Allowed Not Allowed Allowed Factory Allowed Setting Allowed Setting Factory Factory 110E48C Allowed Sett ng Allowed Setting 110E60C Factory Allowed Not Factory Allowed Setting Allowed Setting TABLE 16 Allowable Circulation Speeds EL280UH Model Red Yellow Blue Brown Black Number 045E36A Factory Setting Allowed 070E36A 090E36B Allowed Factory Setting 090E48B Factory Setting Allowed Not Allowed Not Allowed Not Allowed 110E48C Allowed Factory Setting 110E60C Factory Setting Allowed Page 44