The URL can be used to link to this page

Report (2) M Q C-2frLt-o - 3,,p tt 5 FUR1 ACE�A" IElVNI7X EL280UHE ELITE®SERIES ® Upflow/Horizontal -Two-Stage Heat- Constant Torque Blower-60 Hz RESIDENTIAL Bulletin No.210871 November 2020 PRODUCT SPECIFICATIONS Supersedes July2020 GM GF TIGARD BUILDING DIV 101' IS oca .142, °O n B O O , n�c,nrzcl�pr�c7 ELITE'® SERIES ,'� , ' Ft yr $ T O ` , 000, a ir0p °cpoOgca a ''' cOoc,000ao AFUE - 80% Input - 44,000 to 110,000 Btuh Nominal Add-on Cooling - 1.5 to 5 Tons MODEL NUMBER IDENTIFICATION EL 2 80 UH 090 X E 48 B Unit Type g 1 'Cabinet Width EL=Elite' Series A=14-1/2 in. B=17-1/2 in. Stages C=21 in. 2=Two-Stagle AFUE' i Nominal Add-On Cooling Capacity 80=80% 36=1.5-3.5 tons 48=3-4 tons LConfiguration 60=4-5 tons — UH=Upflow/Horizontal a Blower Nominal Gas Heat Input E=High EfficiencyConstant Torque Blower Motor 045=44,000 Btuli. 070=66,000 Btuh 090=88,000 Btuh •---ii Low NOx 110=110,000 Btuh X=Units meet California Nitro en Oxides Standard 40n /J 'Indoor coils with the same letter designation will physically match the furnace. FEATURE HIGHLIGHTS • 1. Lennox Duralok® Heat Exchanger ' 2. Inshot Burners O; 3. SureLight® Hot Surface Ignitor 0 4. Two-Stage Gas Control Valve e 0 ® - I 5. Two-Speed Combustion Air Inducer 6. Flame Rollout Switches • 7. SureLight® Integrated Furnace Control 8. Power Saver® Constant Torque Blower 1�: , • 9. Insulated Cabinet 10. Safety Interlock Switch 11. Gas Piping And Electrical Inlets r M1 NOTE- EL280UHE FURNACES ARE NOT AVAILABLE IN CANADA! CONTENTS Approvals And Warranty 3 Blower Data 15 Dimensions 11 - Unit-Upflow Position 11 - Unit-Horizontal Position 12 - Optional Accessories 13 - Furnace/Coil Combined Dimensions 14 Features 3 Gas Heat Accessories-Order Separately 10 High Altitude Derate 10 Installation Clearances 7 Model Number Identification 1 Optional Accessories-Order Separately 10 Specifications 8 FI 9Rnl 44F r Pans 9 APPROVALS AND WARRANTY APPROVALS • AHRI Certified • CSA International Certified • Tested and rated according to US DOE test procedures and FTC labeling regulations • ISO 9001 Registered Manufacturing Quality System • Blower data from unit tests conducted in Lennox Laboratory air test chamber California Only • These furnaces do not meet the South Coast Air Quality Management District(SCAQMD) Rule 1111 and San Joaquin Valley Air Pollution Control District(SJVAPCD) Rule 4905 NOx emission limit(14 ng/J)and cannot be installed within the SCAQMD and SJVAPCD areas • All"X•model furnaces are approved by the California Energy Commission and meets California Nitrogen Oxides Standard(NOx) limits of 40 ng/J WARRANTY • Duralok'"Aluminized Steel Heat Exchanger: • Limited twenty years in residential applications • Limited ten years in non-residential applications • All other covered components: • Limited five years in residential installations • Limited one year in non-residential installations NOTE-Refer to Lennox Equipment Limited Warranty certificate included with unit for specific details. FEATURES APPLICATIONS • Laboratory life cycle tested in excess of industry • Input capacities of 44,000,66,000,88,000 and 110,000 standards Btuh • Compact size of heat permits low overall design of • Energy efficiency(AFUE)-80% furnace cabinet • Compact cabinet for upflow, horizontal-left or horizontal- ®Inshot Burners right applications • Aluminized steel inshot burners provide efficient,trouble- • Lennox add-on indoor coils, high-efficiency air cleaners free operation and humidifiers can easily be added to furnace • Burner venturi mixes air and gas in correct proportion for • Shipped factory assembled with all controls installed proper combustion and wired • Burner assembly is removable from the unit as a single • Ready for installation in upflow or horizontal right-hand component for ease of service position without any modifications ®SureLight®Hot Surface Ignitor NOTE-Horizontal left-hand requires repositioning of • Tough, reliable,long-life,trouble-free performance pressure switch. • Silicon nitride ignitor • Removable bottom seal panel shipped in place for side • Cemented to steatite block for protection against current return air is easily removed for bottom/end return air leakage applications • Ignition leads constructed of nickel plated copper • Each unit factory test operated to ensure proper enclosed in high temperature Teflon®insulation for operation dependable operation HEATING SYSTEM 0 Two-Stage Gas Control Valve OLennox Duralok'" Heat Exchanger Assembly • 24 volt redundant combination two-stage gas control • Heavy gauge aluminized steel heat exchanger valve combines manual shut off switch(On Off), automatic electric valve(dual)and gas pressure • Crimped seam clamshell type design regulation into a compact combination control • Designed for normal expansion and contraction • Minimum resistance to air flow Fl 9Rnl INF/Dana/ . FEATURES HEATING SYSTEM (continued) BLOWER )Two-Speed Combustion Air Inducer • Direct drive blower • Heavy duty,permanent split capacitor(PSC)two-speed • Statically and dynamically balanced blower prepurges heat exchanger and safely vents flue • Resiliently mounted products • • Dual pressure switches (low fire/high fire)prove blower Blower assembly easily removed for servicing operation before allowing gas valve to open ®Power Saver °Constant Torque Blower Motor • Operates only during heating cycle • DC Brushless Motor • Direct access allows inducer assembly to be rotated 90° • High Efficiency Constant Torque clockwise or counterclockwise to facilitate easy vent • ECM (Electronically Commutated Motor) attachment • Motor is programmed to provide constant torque at 'Flame Rollout Switches(2) each of the selectable speeds • Factory installed on burner box • Motor is controlled by the Integrated Furnace Control • Switch provides protection from abnormal operating • Blower speeds are easily changed on the integrated conditions furnace control • Manual reset • See blower data tables Limit Controls CONTROLS • Primary limit factory installed on vestibule panel ®SureLighr Integrated Two-Stage Furnace Control Board • Secondary limit factory installed on blower housing • Contains all necessary controls and relays to operate • Automatic reset furnace Optional Accessories • Combustion air inducer is operated by the integrated furnace control High Altitude Pressure Switch Kit • Prior to ignition,a pre-purge cycle for 15 seconds is • Required on most units for proper unit operation at initiated altitudes from 4501 to 10,000 ft. • After the main burners are turned off,a post-purge cycle Natural Gas to LPG/Propane Conversion Kit for 5 seconds is run • Required for field changeover from natural gas to LPG/ • Flame sensor assures safe and reliable operation Propane • Should loss of flame occur the integrated furnace LPG/Propane to Natural Gas Conversion Kit control will initiate 4 re-attempts at ignition before • Required for field changeover from LPG/Propane to locking out unit operation for 60 minutes natural gas • Watchguard type circuit automatically resets ignition Vent Adaptor(Upflow Applications Only) controls after one hour of continuous thermostat • Allows venting through a demand after unit lockout,eliminating nuisance calls for masonry chimney without the bin. (152 mm) service need of a flue liner • Jumper settings for single or two stage thermostat • Manual reset temperature operation sensor protects against lir7 in. • Two selectable 2nd stage recognition times(10 and 15 abnormal operating conditions rr 1176 mm) minutes)are available on the board when the furnace is • Sensor wiring may be routed F;• used with a single stage thermostat from either side of adaptor f • When used with a two stage thermostat,furnace will • Minimum winter design only initiate second stage operation with a second stage temperatures: thermostat demand • -10°F when used with interior • Fan control consists of adjustable blower timed-off masonry chimneys. delay(60,90, 120, 180 seconds-factory setting 90 • +5°F when used with exterior masonry chimneys s seconds)and fixed blower timed-on delay(30 seconds � heating,2 seconds cooling) NOTE-Refer to Winter Design Temperatures Map on page • For air-conditioning applications,blower is automatically 7 for application information.Also refer to the energized on thermostat demand for cooling installation instructions for detailed information. • Two accessory terminals furnished for additional power supply requirements for 120 volt(less than 1 amp) power humidifiers and powered air cleaners • A separate 24V accessory terminal is also provided for low voltage accessories • Ignition control has single red LED to indicate status and as an aid in troubleshooting Fl 9Rni INF/Pane.A. FEATURES CONTROLS (continued) Remote Outdoor Temperature Sensor • iComfort®E30 Smart Thermostat 24 Volt Transformer • Furnished and factory installed outside of the control box • When installed outdoors,sensor 5 , allows thermostat to display outdoor \ • 40VA transformer has circuit breaker wired in series temperature Field Wiring Make-Up Box NOTE-Sensor is required for Enhanced • Furnished for line voltage wiring Dehumidification Control(EDA) • Factory installed internally on left side of furnace applications. • Box may be installed on right side of furnace NOTE-The outdoor sensor is furnished as standard with iComfort®Communicating outdoor units,optional Optional Accessories for conventional units. iComfort®E30 Smart Wi-Fi Thermostat Thermostat • Wi-Fi enabled,electronic 7-day,universal,multi-stage, • Thermostat is not furnished with unit programmable,touchscreen thermostat • 3 Heat/2 Cool • See Lennox Price Book for selection • Auto changeover Furnace Twinning Kit • Required to operate two furnaces simultaneously. • Controls dehumidification during cooling mode and / • Kit consists of twinning relays,quick connect terminals humidification during and mounting hardware heating mode • Used for two-stage heating/single-stage cooling with • Offers enhanced either a single-stage or two-stage thermostat capabilities including humidification/dehumidification/ Night Service Kit dewpoint measurement and control,Humiditrol®control, • Contains most commonly used service parts and equipment maintenance reminders • • Easy to read 7 in.color touchscreen(measured diagonally) Furnace control • • LCD display with backlight shows the current and set Gas valve temperature,time,inside relative humidity,system • Ignitor status (operating mode and schedules)and outside • Transformer temperature(optional outdoor sensor required) • Flame sensor • Smooth Setback Recovery starts system early to • achieve setpoint at start of program period Service manual • Compressor short-cycle protection(5 minutes) CABINET • Up to four separate schedules are available plus • Low profile,narrow width cabinet allows easy Schedule IQ" installation • One-Touch Away Mode-A quick and easy way to set the • Heavy gauge,cold rolled steel construction cooling and heating setpoints while away • Pre-painted finish • Smart Away"'-Uses geo-fencing technology • Flue outlet on top of cabinet for upflow applications, to determine when the homeowner is within a can be relocated to either side of cabinet for horizontal predetermined distance from the home to operate the applications system when leaving,away and arriving • Flanges provided on supply air opening for ease of • Wi-Fi remote monitoring and adjustment through a plenum connection or alignment with indoor coil home wireless network for desktop PCs, laptops and ®• Insulated with foil faced insulation on sides and back apps for smartphones or tablets of heating compartment and mat faced insulation in • Smart home automation compatible with Apple blower compartment HomeKit"',Amazon Alexa®,Google Assistant and IFTTT • Sealed blower compartment • Service Dashboard features online real-time monitoring • Inner blower compartment access panel seals blower of installed iComfort®thermostats compartment from air leakage • High Definition Color Display with Subbase,Smart Hub • Cabinet door can be removed without any tools Controller,wallplate(for retrofit installations)furnished for easy installation • Complete service access • See the'Comfort°E30 Smart Wi-Fi Thermostat Product ®' Safety interlock switch automatically shuts off power Specifications bulletin for more information to unit when inner blower compartment access panel is removed e• Gas piping and electrical inlets are provided in both sides of cabinet FI 9RfllwF/Puna FEATURES CABINET(continued) High Performance Economizer Low Leakage Cabinet (Commercial Applications Only) • Designed for applications requiring outdoor air to be • All models have less than 2%air leakage and meet ANSI/ASHRAE Standard 193-2010"Method of Test for utilizedntyof in a commercialoor for freeC system. g,l reducing the Determining the Air Tightness of HVAC Equipment" entry requirement outdoor air for cooling, the for mechanical cooling. Bottom/Side Return Air Entry: • Heavy gauge galvanized steel cabinet lined with thick • Upflow/horizontal with bottom return air entry: fiberglass insulation. • Remove furnished bottom seal panel from cabinet • Mixed air sensor,outdoor air sensor and 24VAC • Upflow only with side return-air entry: transformer furnished. • Corners are marked on either side of cabinet for return • Approved for California Title 24 building standards. air cut-out • ASHRAE 90.1-2010 compliant. • See dimension drawings • See separate Product Specifications bulletin for NOTE-60C size units that require air volumes over 1800 additional information and available control and sensor cfm must have one of the following: options. • Single side return air and Optional Return Air Base with ' FILTER (not furnished) transition that must accommodate required 20 x 25 x • Filter and provisions for external mounting must be field 1 inch air filter to maintain proper velocity provided. • Bottom return air Optional Accessories • Return air from both sides Air Filter and Rack Kit for Horizontal Return Air(End) • Bottom and one side return air Applications • See Blower Data Tables for additional information • Washable or vacuum cleanable polyurethane frame type filter and external end return air rack available for field Coil Match-Up installation. • All furnaces exactly match Lennox cased upflow indoor • Rack has filter door for easy filter servicing. coils and horizontal indoor coils with same letter designation (A, B,C,D)in model number • Flanges on rack allow easy duct connection. • No adaptor required • See dimension drawing. • Engaging holes furnished on cabinet for alignment. Air Filter and Rack Kit for Upflow Side Return Air • Lennox uncased coils match furnaces without any • Applications-Not for use with Return Air Base overhang but require an optional adaptor base or field • Washable or vacuum cleanable polyurethane frame type fabricated transition to match furnace opening filter and external side return air rack available for field • See coil bulletin for additional information installation. • Available in single and ten pack kits. Optional Accessories • Rack has filter door for easy filter servicing. • Flanges on rack allow easy duct connection. Horizontal Suspension Kit • • Provides suspension of unit and indoor coil in horizontal Field installs on either side of unit cabinet.See applications. dimension drawing. • Allows complete service access. • Consists of corner mounted hanging brackets with vibration isolators,return air end support rail and hardware for assembly. • Metal hanging straps must be field provided. Return Air Base • A field fabricated transition or Return Air Base is required when using an IAQ product higher than 14-3/16 in. installed next to the unit and serviced from the front. IAQ products higher than 20 in. require a field fabricated transition. • Base must be used for 60C models with air volumes over 1800 cfm in upflow applications when only one side return is required. • Cabinet is shipped flat for easy field assembly and is pre- painted steel to match the furnace.See Dimension Drawing. FI�Rf111HF/Pana fi . 99% WINTER DESIGN TEMPERATURES FOR THE CONTIGUOUS UNITED STATES 5°F -10F 17°F lir 11, t, 10F i.F.. :!N\„,,, -,. . 1\ 1t11"r I, I I Ii p IrI.i, 1-1 I-11 aI.1.1I.I IIP"tk l.l.Wk• r.l41,4,a.4. i4lk/i4-.w..1P.. .1I_I t 1l/,1,m9..0 g'1'1rk -Ap4III 1II1? 1:11"-l. (k'.. 27°F 7/' • 1 5°F -1oF f� 37°F . a' 11JTF 17°F ` — - 4 37°F This map is a necessarily generalized guide to temperatures in the contiguous Unites States.Temperatures shown for areas such as mountainous regions and large urban centers may not be accurate.The data used to develop this map was taken from the 1993 ASHRAE Fundamentals Handbook(Chapter 24,Table 1:Climate Conditions for the United States). Reprinted with permission from NFPA 54: National Fuel Gas Code 1999, National Fire Protection Association,Quincy, MA 02269.This reprinted material is not the complete and official position of the National Fire Protection Association on the referenced subject,which is represented only by the standard in its entirety. INSTALLATION CLEARANCES UPFLOW POSITION HORIZONTAL POSITION Vent Type Type B1 Type C Vent Type Type B1 Type C Sides 0 (0) ' 0(0) End ' 2 1 2 Rear 0 (0) 0(0) Rear 0(0) 0(0) Top 1 (25) 1 (25) Top ' 0(0) '0(0) Front 2-1/4(57) 2-1/4(57) Front 2-1/4(57) 2-1/4(57) Front(service/alcove) 24(610) 24 (610) Front(service) 24 (610) 24(610) Floor Combustible Combustible Floor Combustible Combustible Flue 1 (25) 6(152) Flue 1 (25) 6(152) NOTE-Air for combustion must conform to the methods outlined in the National NOTE-Air for combustion must conform to the methods outlined in the National Fuel Gas Code(NFPA 54/ANSI-Z223.1). Fuel Gas Code(NFPA 54/ANSI-Z223.1). NOTE-In the U.S.flue sizing must conform to the methods outlined in the NOTE-In the U.S.flue sizing must conform to the methods outlined in the current National Fuel Gas Code(NFPA 54/ANSI-Z223.1)or applicable current National Fuel Gas Code(NFPA 54/ANSI-Z223.1)or applicable provisions of local building codes. provisions of local building codes. 'Left side requires 4 in.if single wall vent is used on 14-1/2 in."A"width 'Line contact installation permissible between jacket top or sides and building cabinets,2 in.on 17-1/2 in."B"width cabinets. joists. Fl 7An1114F/Pang 7 . SPECIFICATIONS Gas Model No. EL280UH045E36A EL280UH070E36A Heating Model No.-Low NOx --- EL280UH070XE36A Performance 'AFUE 80% 80% High Input-Btuh 44,000 66,000 Fire Output-Btuh 35,000 53,000 Temperature rise range-°F 30-60 30-60 Gas Manifold Pressure(in.w.g.) 3.5/ 10.0 3.5/10.0 Nat. Gas/LPG/Propane Low Input-Btuh 29,000 43,000 Fire Output-Btuh 23,000 35,000 Temperature rise range-°F 20-50 20-50 Gas Manifold Pressure(in.w.g.) 1.7/4.5 1.7/4.5 Nat.Gas/LPG/Propane High static-in.w.g. Heating 0.5 0.5 Cooling 0.5 0.5 Connections Flue connection-in.round 4 4 in. Gas pipe size IPS 1/2 1/2 Indoor Wheel nominal diameter x width-in. 10 x 8 10 x 8 Blower Motor output-hp 1/2 1/2 Tons of add-on cooling 1.5-3.5 2-3.5 Air Volume Range-cfm 250-1500 350- 1375 Electrical Data Voltage 120 volts-60 hertz-1 phase Blower motor full load amps 6.1 6.1 Maximum overcurrent protection 15 15 Shipping Data lbs. - 1 package 111 121 NOTE-Filters and provisions for mounting are not furnished and must be field provided. 'Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations.Isolated combustion system rating for non-weatherized furnaces. SPECIFICATIONS Gas Model No. EL280UH090E36B EL280UH090E48B Heating Model No.-Low NOx --- EL280UH090XE48B Performance 'AFUE 80% 80% High Input-Btuh 88,000 88,000 Fire Output-Btuh 70,000 69,000 Temperature rise range-°F 35-65 30-60 Gas Manifold Pressure(in.w.g.) 3.5/10.0 3.5/10.0 Nat.Gas/LPG/Propane Low Input-Btuh 57,000 57,000 Fire Output-Btuh 46,000 46,000 Temperature rise range-°F 25-55 20-50 Gas Manifold Pressure(in.w.g.) 1.7/4.5 1.7/4.5 Nat.Gas/LPG/Propane High static-in.w.g. Heating 0.5 0.5 Cooling 0.5 0.5 Connections Flue connection-in.round 4 4 in. Gas pipe size IPS 1/2 1/2 Indoor Wheel nominal diameter x width-in. 10 x 9 10 x 10 Blower Motor output-hp 1/2 3/4 Tons of add-on cooling 2-3.5 3-4 Air Volume Range-cfm 350-1600 765-1800 Electrical Data Voltage 120 volts-60 hertz- 1 phase Blower motor full load amps 6.1 8.2 Maximum overcurrent protection 15 15 Shipping Data lbs.- 1 package 136 140 NOTE-Filters and provisions for mounting are not furnished and must be field provided. 'Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations.Isolated combustion system rating for non-weatherized furnaces. Fi 9Anf n-F/Pane A SPECIFICATIONS Gas Model No. EL280UH110E48C 1 EL280UH110E60C Heating Model No.-Low NOx --- EL280UH110XE60C Performance 1AFUE 80% 80% High Input-Btuh 110,000 110,000 Fire Output-Btuh 86,000 87,000 Temperature rise range-°F 35-65 30-60 Gas Manifold Pressure(in.w.g.) 3.5/10.0 3.5/10.0 Nat.Gas/LPG/Propane Low Input-Btuh 72,000 72,000 Fire Output-Btuh 58,000 58,000 Temperature rise range-°F 25-55 20-50 Gas Manifold Pressure(in.w.g.) 1.7/4.5 1.7/4.5 Nat.Gas/LPG/Propane High static-in.w.g. Heating 0.5 0.5 Cooling 0.5 0.5 Connections Flue connection-in.round 4 4 in. Gas pipe size IPS 1/2 1/2 Indoor Wheel nominal diameter x width-in. 10 x 10 11-1/2 x 10 Blower Motor output-hp 3/4 1 Tons of add-on cooling 3-4 4-5 Air Volume Range-cfm 865-1780 1100-2200 Electrical Data Voltage 120 volts-60 hertz-1 phase Blower motor full load amps 8.2 10 Maximum overcurrent protection 15 15 Shipping Data lbs.-1 package 152 156 NOTE-Filters and provisions for mounting are not furnished and must be field provided. 'Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations.Isolated combustion system rating for non-weatherized furnaces. Fl 9Anl ll-IF/Dana Q • OPTIONAL ACCESSORIES - ORDER SEPARATELY "A"Width "B"Width "C"Width Models Models Models CABINET Horizontal Suspension Kit-Horizontal only 51W10 51W10 51W10 Return Air Base-Upflow only 65W75 50W98 50W99 High Performance Economizer(Commercial only) 10U53 10U53 10U53 CONTROLS iComforte E30 Smart Wi-Fi Thermostat 20A65 20A65 20A65 Remote Outdoor Temperature Sensor X2658 X2658 X2658 Furnace Twinning Kit 16W72 16W72 16W72 FILTERS I Air Filter and Rack Kit Horizontal(end) 87L95 87L96 87L97 Size of filter-in. 14x25x1 18x25x1 20x25x1 Side Return Single 44J22 44J22 44J22 Ten Pack 66K63 66K63 66K63 Sizeoffilter-in. 16x25x 1 16x25x 1 16x25x 1 NIGHT SERVICE KIT Night Service Kit 17B59 I 17B59 17B59 VENTING Vent Adaptor-6 in.conn.size upflow applications only 18M79 I 18M79 I 18M79 'Cleanable polyurethane,frame-type fitter. GAS HEAT ACCESSORIES - ORDER SEPARATELY High Altitude Natural Gas to LPG/Propane Natural Gas LPG/Propane Pressure Switch Kit LPG/Propane to Natural Gas High Altitude High Altitude Input Kit Kit Orifice Kit Orifice Kit j 0-4500 ft. 4501 -7500 ft. 7501 -10,000 ft. 0-7500 ft. 0-7500 ft. 7501 -10,000 ft. 7501 -10,000 ft. 045 No Change 91W53 73W35 11K51 77W09 73W37 11K46 070 No Change 91W53 73W35 11K51 77W09 73W37 11K46 090 No Change 91W53 73W35 11K51 77W09 73W37 11K46 110 No Change 91W53 73W35 11K51 77W09 73W37 11K46 HIGH ALTITUDE DERATE NOTE-Units may be installed at altitudes up to 4500 ft.above sea level without any modifications. At altitudes above 4500 ft. units must be derated to match information in the shaded area shown below. NOTE-This is the only permissible derate for these units. Gas Manifold Pressure(Outlet)in.w.g. 0-4500 Feet 4501 -7500 Feet 7501 -10,000 ft. Input Natural Gas LPG/Propane Natural Gas LPG/Propane 1 Natural Gas LPG/Propane High Low High Low High Low High Low High Low High Low Fire Fire Fire Fire Fire Fire Fire Fire Fire Fire Fire Fire 045 3.5 1.7 10 4.5 3.2 1.5 10 4.5 3.5 1.7 10 4.5 070 3.5 1.7 10 4.5 3.2 1.5 10 4.5 3.5 1.7 10 4.5 090 3.5 1.7 10 4.5 3.2 1.5 10 4.5 3.5 1.7 10 4.5 110 3.5 1.7 10 4.5 3.2 1.5 10 4.5 3.5 1.7 10 4.5 'Natural Gas High Altitude Orifice Kit required. Fl 9R01114F/Pane in DIMENSIONS UNIT - UPFLOW POSITION 1 NOTE-60C size units that require air volumes over 3-1/8(79) 1800 cfm must have one of the following: , 1.Single side return air and Optional Return Air Base it meo no 0 LIB with transition that must accommodate required 20 x 25 x 1 inch (508 x 635 x 25 mm)air filter to + maintain proper velocity. ..---/� 2. Bottom return air. SUPPLY AIR FLUE OUTLET one OPENING 3. Return air from both sides. (Top) 0000 4. Bottom and one side return air. 00000 See Blower Performance Tables for additional information. 00000 00000 2 Flue outlet may be horizontal but furnace must be 00000 vented vertically i� 3 Optional External Side Return Air Filter Kit is not for use 3OPTIONAL with the optional Return Air Base. EXTERNAL I. 23-3/4 wIJ SIDE RETURN AIR FILTER KIT 25 (Either Side) (635) TOP VIEW 1-1/2(38)i 27-3/4 I. Front Panel (705) A r- r•• 110 3-1/4(83) r B 9/16(14) 3(76)Right 19-7/16 f 9/16 7(178)Left (494) (14) T pp�`� 2 FLUE OUTLET ( �) 9-1/8(232)Right ° + (Either Side) 3OPTIONAL 8-5/8(219)Left ''' GAS PIPING INLET e e e a e e e e e e o o EXTERNAL / (Either Side) eeeeeeeeeeoo ■ eeeeeeeeeeeo SIDE RETURN oeooeee00000 ■ �+ eeeaaaeoeaee AIR FILTER KIT ■ • • (Either Side) 33 5-3/8(137)Right • / (8 8) 2-3/16(56)Left 1 ELECTRICAL INLET (Either Side) , 7 k :-. I --1 /4 (� (584) f(38) e00000000eee (375) • 'Side Return 14 eeeeeeeeaeaa ■ 000000ee1=1=ee ■ eeaa ea sasses 16 ■ Air Opening (356) e e e e e e e e e e e e (406) • i (Either Side) ti _J AIR FLOW j jL — 1-15/16(49) L 5/8 } ill : 3/4� _I �3/4 (16) 3-1/4i F - 23-1/2 (19) C rrrlll (19) (83) (597) I Bottom Return 1 Bottom Return Air Opening Air Opening FRONT VIEW SIDE VIEW A B C D Model No. in. mm in. mm in. mm in. mm EL280UH045E36A 14-1/2 368 13-3/8 340 13 330 4-3/4 121 EL280UH070E36A EL280UH090E366 17-1/2 446 16-3/8 416 16 406 6-1/4 159 EL280UH090E48B EL280UH110E48C 21 533 19-7/8 504 19-1/2 495 8 203 EL280UH110E60C Fl 7R0111.1F/Pana 11 DIMENSIONS UNIT - HORIZONTAL POSITION LEFT-HAND AIR DISCHARGE f • r , Flue outlet may be from end but furnace must be vented vertically GAS PIPING INLET (Top or Bottom) 9-1/8(232)Top AIR 8-5/8(219)Bottom FLOW ELECTRICAL INLET FLUE OUTLET • •� (Top or Bottom) • (Top) p , 3-1/4{83) 3 5-3/8(137)Top (76) 2-3/16(56)Bottom TOP VIEW 27-3/4 1 FLUE 33 1-1/2(38) 27-3/4 (705) 9/16 OUTLET (838) Front Panel 3/4 (705) (14) • (End) r '(19) 1 mays .i 9/16 19-7H6 I 3-1/4 , 23-1/2 (14) (491) B OM I A AIR 1(108) 1 C (597) SUPPLY - IIIMIFLOW RETURN AIR + I AIR OPENING ioll p ■■°■■ 1 Ti' I OPENING - , ra END VIEW 3 1/ 4P FRONT VIEW END VIEW (79) RIGHT-HAND AIR DISCHARGE r , • 1 Flue outlet may be horizontal but GAS PIPING INLET furnace must be vented vertically AIR (Top or Bottom) FLOW ELECTRICAL INLET _ .__ t FLUE OUTLET (Top or Bottom) (Top) Fs."...-:-..-- o • - 3 1/4(83) I ..... { A, 2-3/16(56)Top �8-5/8(219)Top 5-3/8(137)Bottom 9-1/8(232)Bottom TOP VIEW 1FLUE OUTLET 27-3/4 1-1/2(38) 33 (End) 27-3/4 (705) Front Panel rF... (838) i (705) _I (79) 23-1/2 3-1/4 D 1 ■■ ■■ 19-7/16 _4_, (597) ALl (108)� MR ] I3-1/8 f(,+, (494) 9/16 RETURN J A FLOW L.:::: SUPPLYB (14) AIRMOM AIR OPENING OPENING t_3/4 't9/16 END VIEW (19) FRONT VIEW END VIEW (14) A B C D Model No. In. mm in. mm in. mm in. mm EL280UH045E36A 14-1/2 368 13-3/8 340 13 330 4-3/4 121 EL280UH070E36A EL280UH090E366 17-1/2 446 16-3/8 416 16 406 6-1/4 159 EL280UH090E488 EL280UH110E48C 21 533 19-7/8 504 19-1/2 495 8 203 EL280UH110E60C FI 9R01I1-IF/Panel 19 . DIMENSIONS OPTIONAL ACCESSORIES HORIZONTAL(END) FILTER KIT 1-1/4 24-3/4 (32) r (16) (629) - �1 1 • (16) ! ! Furnace Catalog A B Cabinet Number Width in. mm in. mm A B RETURN A 87L95 14 356 12-3/4 324 AIR OPENING B 87L96 18 457 16-3/4 425 5/8 AIR FLOW C 87L97 21 533 18-3/4 476 (16) 23-1/2 — ' (597) 'ufu - AIR FILTER-XL 5/8 f (Furnished) (16) SIDE VIEW FRONT VIEW Optional Return Air Base (Upfiow Applications Only -For use with A, B and C width cabinets) FURNACE — l / FRONT IF BASE " O f 123(584) T 1 aooaoaaoa000 IS USED 1 3-1/4 Overall �{ 0 0 o a o 0 0 o a o a o WITHOUT / (83) 1 (Maximum) ' Minimum oaoaaoaaaaoa IAQ CABINET, 11 (279) aaaa aooaeooa ASINGLE aoaao00ooao INDOOR AIR 2 Maximum 1 .22.7l16 It QUALITY RETURN AIR( I 1 Unit side return air CABINET PLENUM I I Opening 14(356) I (570) AIR FLOW (PCO,Filter MUST L- 1,�-�-�,1 Cabinet,etc.) COVER BOTH' (Maximum) UNIT AND RETURN � -� • SIDE RETURNii AIR BASE 7-1/4 AIR OPENINGS OPENINGS I 5-518 (184) (143) \ ———— �_ (Either Side) OPTIONAL 23 _ � 14-1/2(368)A Width(65W75)I RETURN + (584) 3/4 17-1/2(446)B Width(50W98) AIR BASE 26-7/8 (19) 21 (533)C Width(50W99) L (683) SIDE VIEW NOTE-Optional Side Return Air Filter Kits are not for use with Optional Return Air Base. 1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ 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 pressure drop,the largest opening height possible,up to 14 in.(356 mm),is preferred. Fl 911111114F I Paso 11 DIMENSIONS FURNACE/COIL COMBINED DIMENSIONS UPFLOW POSITION C35/CX35 C35 Cased Uncased Model No A B A B in. mm in. mm in. mm in. mm C35/CX35-18/24A 16-1/2 419 49-1/2 1257 14-1/8 359 47-1/8 1197 C35/CX35-18/24B C35/CX35-24A 18-1/2 470 51-1/2 1308 16-3/8 416 49-3/8 1254 1 7 C35/CX35-24B --- 20-1/2 521 53-1/2 1359 --- --- --- --- / „ ,( A C35/CX3530A 22-1/2 572 55-1/2 1410 20-3/4 527 53-3/4 1365 // , �\� ` C35/CX35-30B % (1 -,A v A C35/CX35-30/36A B C35/CX35-30/36B 24-1/2 622 57-1/2 1461 22-1/4 565 55-1/4 1403 C35/CX35 30/36C -- -A" • C35/CX35-36A l?;:•, `/ 33 24-1/2 622 57-1/2 1461 22-3/8 568 55-3/8 1407 •°a.a;ee° • /� ' , (838) C35/CX35368 •°°o � � p� !�V(--- 24-1/2622 57-1/2 1461 --- --- --- 0 C35/CX35 48B z.27-1/2 699 60-1/2 1537 26-1/4 667 59-1/4 1505 v> ,, C35/CX35-48C •oao., --- 24-1/2622 57-1/2 1461 --- --- --- --- C35/CX35-49C 29-1/2 749 62-1/2 1588 28-1/2 724 61-1/2 1562 C35/CX35-50/60C 27-1/2 699 60-1/2 1537 25-7/8 657 58-7/8 1495 CX35-60C 31-1/2 800 64-1/2 1638 30-5/8 778 63-5/8 1616 HORIZONTAL POSITION A B Model No. in, mm in. mm CH35 CH35-18A, CH35-36A, 26-1/2 673 59-1/2 1511 /B 33 CH35-24A, CH35-36B, f// (838) CH35-24B, CH35-36C, A CH35-30B, CH35-42C, CH35-48C CH35-30A, CH35-51C 31-1/2 880 64-1/2 1638 /11 / CH35-42B, /// • ® Qo6 _ CH35-48B, ao^ao /�i '' Zip: `- Qa,i of^e CHX35 I h\ go; sf: CHX35-18A, CHX35-36A, 26-1/2 673 59-1/2 1511 I 4q leal, °p° >-4 °°g' CHX35-24A, CHX35-36B, go CHX35-24B, CHX35-36C, Jf .°' CHX35-30B, CHX35-42C, CHX35-48C CHX35-30A, CHX35-51/61C 31-1/2 880 64-1/2 1638 CHX35-42B, CHX35-488, Fl 2Rf1111-4F/Pana 1d BLOWER DATA EL280UH045E36A 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 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 I 380 107 --- --- EL280U11070E36A 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 4 895 113 680 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/Wafts 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 © 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 1 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 PI 9Rnl IHF/pane,15 • . 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 EL280UH110E60C PERFORMANCE(Less Filter) Air Volume/Watts at Different Blower Speeds Single Side Return Air-Air volumes in bold(over 1800 Bottom Return Air,Side Return Air from Both Sides or cfm) require Optional Return Air Base and field fabricated External Return Air from Bottom and One Side. transition to accommodate 20 x 25 x 1 in.air filter in order to Static maintain proper air velocity. Pressure in.w. Medium- Medium- Medium- Medium- 9• High Medium Low High Medium Low Black High Low High 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 FI lRnl141F/Dana 1R REVISIONS Sections Description of Change Optional Accessories E30 catalog number updated. pE51O�y Al NAM CERTIFIED lip sew� ,=, ahtitllroctcry.otg ca 11 Ie) LENNOXX) Visit s at www.Letechncalinom For the latest technical information,www.LennoxPros.com ® Contact us at 1-800-4-LENNOX NOTE-Due to Lennox'ongoing commitment to quality,Specifications.Ratings and Dimensions subject to change without notice and without incurring liability. Improper installation,adjustment,alteration,service or maintenance can cause property damage or personal injury. Installation and service must be performed by a qualified installer and servicing agency. ©2020 Lennox Industries,Inc. LENNOX) RECEIVED INSTALLATION ©20'19 Lennox Industries Inc '. R 2 ? `ill,. INSTRUCTIONS Dallas,Texas,USA CITY OF TIGARD 3UILDING DIVISION Merit® Series ML14XC1 Units AIR CONDITIONERS 507524-01 ••-•-:: 02/2019 _, � �� , WARNING ti �= Improper installation, adjustment, alteration, service or w —== maintenance can cause personal injury, loss of life, or 0t * damage to property. r -��y Installation and service must be performed by a licensed professional installer(or equivalent)or a service agency. GENERAL This ML14XC1 outdoor air conditioner with all-aluminum coil is designed for use with HFC-410A refrigerant only. THIS MANUAL MUST BE LEFT WITH THE This unit must be installed with an approved indoor air hanHOMEOWNER FOR FUTURE REFERENCE Specificationsdifr or coil. See the Le) foro ML14XC1 approved Productinoo bulletin (EHB) indoor component match ups. NOTICE ! These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities For more in-depth information, consult the Installa- having jurisdiction before installation. tion and Service Procedures manual, available as IMPORTANT: Special procedures are required for Corp. 1502-L7 on LennoxPros.com or through the cleaning the aluminum coil in this unit. See page 15 in this Technical Support Department at 800-453-6669. instruction for information. STEP 1 -- SETTING THE UNIT -- Clearances See NOTES (--- � NOTES- Service clearance of 30 in. (762 mm)must be maintained on one of 11111/ L. 1 the sides adjacent to the control box. Clearance to one of the other three sides must be 36 in. (914 mm). See 4See NOTES %,"..:0 NOTES Clearance to one of the remaining two sides may be 12 in.(305 mm)and the final side may be 6 in.(152 mm). A clearance of 24 in.must be maintained between two units. CONTROL 48 in.(1219 mm)clearance required on top of unit. \\\ tSee NOTES BOX T NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be required to prevent air recirculation when the unit is installed under a deck or in another tight space.) FIGURE 1 Page 1 N�r ..1. �t o i�sr"s-1ti.rx 507524-01 I UNIT DIMENSIONS - INCHES (MM) NOTICE ! F.,__A-T Roof Damage! III ---t This system contains both refrigerant and oil.Some rubber roofing material may absorb oil,causing the rubber to degrade.Failure to followthis notice could B result in damage to roof surface. IMPORTANT ! : Exhaust vents from dryers, water heaters and fur- 1 !J naces should be directed away from the outdoor unit Prolonged exposure to exhaust gates and the chemi- SIDE VIEW call contained within them may cause condensation FIGURE 2 to form on the steel cabinet and other metal compo- nents of the outdoor unit. This will diminish unit per- formance and longevity. TABLE 1 UNIT DIMENSIONS PLACEMENT Model Numbers A B ML14XC1-018-230A 24-1/4(616) 29-1/4(743) INSTALL UNIT AWAY FROM WINDOWS \. I ML14XC1-024-230A 28-1/4(724) 29-1/4(743) _ . ML14XC1-030-230A 28-1/4(724) 37-1/4(946) ---- — ML14XC1-036-230B 28-1/4(724) 29-1/4(743) ML14XC1-036-230C 28-1/4(724) 33-1/4(845) ___ ML14XC1-041-230A 28-1/4(724) 37-1l4(946) 2---t t� ML14XC1-042-230A 28-1/4(724) 37-1/4(946) ��i _ 11 ��I ,_ _ jj —�— ' r ML14XC1-047-230A 32-1/4(819) 33-1/4(845) _ •`•` ML14XC1-048-230A 28-1/4(724) 37-1/4(946) I.-_/ \�� ML14XC1-059-230A 32-1/4(819) 43-1/4(1098) �� ,— J ML14XC1-060-230A 32-1/4(819) 43-1/4(1098) �'0 0 90°ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION STEP 1 -- SETTING THE UNIT FIGURE 3 (CONTINUED) -- Unit Placement SLAB MOUNTING Install unit level or,if on a slope,maintain slope tolerance of 2 A CAUTION degrees(or 2 inches per 5 feet[50 mm per 1.5 ml)away from building structure. Before attempting to perform any service or maintenance, BUILDING turn the electrical power to unit OFF at disconnect switch. STRUCTURE _- 4DIscHARGE AIR A CAUTION Iii1iii �I As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury.Take care ]� while handling this equipment and wear gloves and pro- Fill = MOUNTING SLAB tective clothing. 11 •I A WARNING ' I i• • , GROUND LEVEL FIGURE 4 To prevent personal injury, as well as damage to panels, unit or structure, observe the following: STEP 2 -- REFRIGERANT PIPING -- Flush- While installing or servicing this unit, carefully stow all ing Existing Line Set and Indoor Coil removed panels so that the panels will not cause injury to personnel, objects or nearby structures. Also, take Flush the existing line set per the following care to store panels where they will not be subject to instructions. For more information, refer to the damage (e.g., being bent or scratched). Installation and Service Procedures manual available While handling or stowing the panels, consider any on LennoxPros.com. CAUTION - DO NOT attempt toflush weather conditions (especially wind) that may cause and reusestco line sets indoor coil when thhee panels to be blown around and damaged. system contains contaminantss (i.e., compressor burn out). Page 2 MLI4XC1 SERIES IMPORTANT ! IMPORTANT ! If this unit is being matched with an approved line Some scroll compressors have an internal vacuum set or indoor unit coil that was previously charged protector that will unload scrolls when suction pres- with mineral oil, or if it is being matched with a coil sure goes below 20 psig. A hissing sound will be which was manufactured before January of 1999, heard when the compressor is running unloaded. the coil and line set must be flushed prior to installa- The protector will reset when low pressure rises tion. Take care to empty all existing traps. Polyol es- above 40 psig. DO NOT REPLACE COMPRESSOR. ter(POE)oils are used in Lennox units charged with HFC-410A refrigerant. Residual mineral oil can act LIQUID LINE FILTER DRIER INSTALLATION as an insulator, preventing proper heat transfer. It can also clog the expansion device and reduce sys- The provided filter drier must be field installed in the liquid tern performance and capacity. line between the outdoor unit's liquid line service valve and Failure to properly flush the system per this instruc- the indoor coil's metering device (fixed orifice or TXV) as tion and the detailed Installation and Service Proce- illustrated in figure 5. This filter drier must be installed to dures manual will void the warranty. ensure a clean, moisture-free system. Failure to install the filter drier will void the warranty.A replacement filter drier is WARNING available from Lennox. See Brazing Connections page 6 for special procedures on brazing filter drier connections to Fire, Explosion and Personal Safety the liquid line. Hazard. Failure to follow this warning could result in damage, personal injury or Typical Liquid Line Filter Drier Installation death. Never use oxygen to pressurize or purge BRAZE CONNECTION POINTS refrigeration lines. Oxygen, when ex- posed to a spark or open flame, can 1,_m J cause fire and/or an explosion,that could , mil li =11 •+ 1E11 I I A result in property damage, personal inju- FLOW ry or death. LIQUID LINE LINE LIQUID SERVICE VALVE LINE A WARN I N G OUTDOOR LIQUID LINE UDO FILTER DRIER When using a high pressure gas such as FIGURE 5 nitrogen to pressurize a refrigeration or air conditioning system, use a regulator that can control the pressure down to 1 or 2 psig A WARN I N G (6.9 to 13.8 kPa). Refrigerant can be harmful if it is inhaled. Refrigerant A WARNING must be used and recovered responsibly. Failure to follow this warning may result in personal injury Polyol ester (POE) oils used with HFC-410A or death. refrigerant absorb moisture very quickly. It is very NOTE - When installing refrigerant lines longer than 50 important that the refrigerant system be kept closed feet, refer to the Refrigerant Piping Design and Fabrication as much as possible. DO NOT remove line set caps Guidelines manual available on LennoxPros.com (Corp. or service valve stub caps until you are ready to make 9351-L9), or contact the Technical Support Department connections. Product Application group for assistance. TABLE 2. REFRIGERANT LINE SET—INCHES (MM) Model Number Valve Size Connections Recommended Line Sets Liquid Line Suction Line L15 Line Set Model Line Set Length Catalog Number ML74XC1-018-230 L15-41-20 20 feet(6.1 m) 89J56 ML14XC1-024-230 L15-41-30 30 feet(9.1 m) 89J57 ML14XC1-030-230 3/8"(10 mm) 3/4"(19 mm) L15-41-40 40 feet(12.2 m) 89J58 L15-41-50 50 feet(15.2 m) 89J59 ML14XC1-036-230 L15-65-30 30 feet(9.1 m) 89J60 ML14XC1-041-230 ML14XC1-042-230 3/8"(10 mm) 7/8"(22 mm) L15-65-40 40 feet(12.2 m) 89J61 ML14XC1-047-230 ML14XC1-048-230 L15-65-50 50 feet(15.2 m) 89J62 ML14XC1-059-230 ML14XC1-060-230 3/8"(10 mm) 1-1/8"(29 mm)* Field-fabricated N/A N/A *Some applications may require a field-provided 1-1/8"to 7/8"adapter. Page 3 ML14XC1 SERIES 9 � . �' ET IMPORTANT-Refrigerant lines must not contact structure. INSTALLATION Line Set Isolation -The following illustrations are REFRIGERANT LINE SET—INSTALLING examples of proper refrigerant line set isolation: VERTICAL RUNS (NEW CONSTRUCTION SHOWN) NOTE-Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET—TRANSITION temperature of the liquid line or when pressure drop is equal to or FROM VERTICAL TO HORIZONTAL greater than 20 psig. ANCHORED HEAVY NYLON WIRE TIE OR AUTOMOTIVE AUTOMOTIVE IMPORTANT-Refrigerant lines must not contact wall MUFFLER-TYPE HANGER MUFFLER-TYPE HANGER OUTSIDE WALL LIQUID LINE \ ,_. r \ SUCTION LINE / / WALL : 1',v i l i r i i i STUD r—'•\ wIRDTIE — INSIDE WALL \�:•(...__.: I STRAP LIQUID LINE TO STRAP g9 WOOD BLOCK NON-CORROSIVE `IN 7 SUCTION LINE BETWEEN STUDS �� \ ---_ METAL SLEEVE \ \ . WIRE TIE LIQUID LINE NON-CORROSIVE .. METAL SLEEVE I WOOD BLOCK SUCTION LINE- _._ . WIRE TIE WRAPPED IN ARMAFLEX 3 STRAP REFRIGERANT LINE SET—INSTALLING , \ HORIZONTAL RUNS ; SLEEVE . To hang line set from joist or rafter,use either metal strapping material j or anchored heavy nylon wire ties. 1 WIRE TIE(AROUND SUCTION LINE 1 SUCTION LINE WRAPPED ONLY) +! WITH ARMAFLEX 8 FEET(2.43 METERS) OUTSIDE STRAPPING I 2 1 WALL LIQUID MATERIAL(AROUND LINE SUCTION LINE ONLY FLOOR JOIST OR \ ROOF RAFTER TAPE OR 1 a r / WIRE TIE —2 8 FEET(2.43 METERS) I PIP PVCE \CAULK \ NON-CORROSIVE METAL SLEEVE FIBERGLASS \ INSULATION TAPE OR STRAP THE SUCTION LINE TO THE WIRE TIE JOIST OR RAFTER AT 8 FEET(2.43 METERS)INTERVALS THEN STRAP NOTE-Similar installation practices should be used if line set is THE LIQUID LINE TO THE SUCTION to be installed on exterior of outside wall. LINE. FLOOR JOIST OR ? _ -� _. ROOF RAFTER J L_ I ) f] FIGURE 6 Page 4 ML14XC1 SERIES STEP 2 -- REFRIGERANT PIPING -- Removing Existing Indoor Metering Device ATYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE (UNCASED COIL SHOWN) OR I BPROCEDURE(UNCASED COIL SHOWN) STUB END DISTRIBUTOR TUBES TWO-PIECE PATCH PLATE LIQUID LINE (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING \OUSING 1 DISTRIBUTOR VALVE TUBES TEFLON':' 'Q. es, TEFLON®RING _ - I� RING , _ ` / FIXED ORIFICE •\ --- id q,f•, --, s ‘"-y ,n ' BRASS NUT �7/�� -+•^^+I tip. TEFLON® • h `V.\ _/ - L.. (�) RING SENSING /��J rr�- _ yl LINE DISTRIBUTOR' - - '• // �C�JLIBUTOR/ ' LIZE LASSEMBLY I/ DISTR REMOVE AND DISCARD ASSEMBLYo LINE .^ WHITE TEFLON®SEAL 1 (`� (IF PRESENT) LIQUID LINE ASSEMBLY (INCLUDES STRAINER) LIQUID LINE/ ASSEMBLY WITH A- On fully cased coils,remove the coil access and plumbing panels. BRASS NUT B- Remove any shipping clamps from the liquid line and distributor as- , I sembly. MALE EQUALIZER / C- Using two wrenches,disconnect liquid line from liquid line orifice hous- LINE FITTING SUCTION ing.Take care not to twist or damage distributor tubes during this pro- SENSING BULB LINE\AO LIQUID cess. LINE D- Remove and discard fixed orifice,valve stem assembly(if present) A- On fully cased coils,remove the coil access and plumbing panels. and Teflon®washer as illustrated above. B- Remove any shipping clamps from the liquid line and distributor E- Use a field-provided fitting to temporarily reconnect the liquid line to the assembly. indoor unit's liquid line orifice housing. C- Disconnect the equalizer line from the check expansion valve equalizer line fitting on the suction line. ZCONNECT GAUGES AND EQUIPMENT FOR D- Remove the suction line sensing bulb. FLUSHING PROCEDURE E- Disconnect the liquid line from the check expansion valve at the liquid line assembly. 0 CYLINDER CONTAINING GAUGE F- Disconnect the check expansion valve from the liquid line orifice CLEAN OH F FLUSHING TO BE MANIFOLD housing.Take care not to twist or damage distributor tubes USED FOR 9 during A (Positioned to deliver liquid this process. refrigerant) G- Remove and discard check expansion valve and the two Teflon® LOWO O HIGH rings. SUCTION LINE NEW O H- Use a field-provided fitting to temporarily reconnect the liquid line SERVICE VALVES OUTDOOR _ to the indoor units liquid line orifice housing. �� UNIT i II IF OPENED T 1 CLOSED FLUSHING LINE SET EXISTING The line set and indoor unit coil must be flushed with at least the same INDOOR UNIT L_____ amount of clean refrigerant` that previously charged the system. LIQUID LINE SERVICECheck the charge in the flushing cylinder before proceeding. VALVE A- Set the recovery machine for liquid recovery and start the RECOVERY �, recovery machine. Open the gauge set valves to allow the CYLINDER -* TANK recovery machine to pull a vacuum on the existing system line \ RETURN set and indoor unit coil. - INLET B- Position the cylinder of clean HCFC-22'for delivery of liquid D '2 g 6 15 •DISCHARGE refrigerantand open its valve to allow liquid refrigerant to flow z into the system through the suction line valve. Allow the RECOVERY MACHINE refrigerant to pass from the cylinder and through the line set and the Indoor unit coil before it enters the recovery machine. A- HCFC-22 cylinder with clean refrigerant'(positioned to deliver liquid C- After all of the liquid refrigerant has been recovered,switch the refrigerant)to the suction service valve. recovery machine to vapor recovery so that all of the HCFC-22 B- HCFC-22 gauge set(low side)to the liquid line valve. vapor is recovered. Allow the recovery machine to pull the C- HCFC-22 gauge set center port to inlet on the recovery machine with an system down to 0. empty recovery tank connected to the gauge set. D- Close the valve on the inverted HCFC-22 drum and the gauge D- Connect recovery tank to recovery machine per machine instructions. set valves.Pump the remaining refrigerant out of the recovery machine and turn the machine off. *IMPORTANT-Clean refrigerant is any refrigerant in a system that has not had compressor burn out.If the system has experienced burn out,it Is recommended that the existing line set and indoor coil be replaced. FIGURE 7 Page 5 ML14XC1 SERIES STEP 2 -- REFRIGERANT PIPING -- Brazing Procedures 1 CUT AND DEBUR 2 CAP AND CORE REMOVAL Cut ends of the refrigerant lines square(free from nicks or dents) Remove service cap and core from and debur the ends.The pipe must remain round.Do not crimp end both the suction and liquid line service Alli of the line. ports. CUT AND DEBUR SERVICE PORT �� SERVICE CAP •P '„ PORT 1:�, i CORE LINE SET SIZE MATCHES ,i nr� 6-1:1 SERVICE VALVE CONNECTION "L�J SERVICE VALVE SERVICE i� CONNECTION CPORT ORE � � T COPPER TUBE '�''�� SERVICE STUB © - PORT CAP 1 ANGLE-TYPE SERVICE BALL-TYPE SERVICE REDUCER VALVE VALVE LINE SET SIZE IS SMALLER DO NOT CRIMP SERVICE VALVE THAN CONNECTION CONNECTOR WHEN PIPE IS SMALLER THAN CONNECTION REFRIGERANT LINE 3 ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION LINE SERVICE VALVES Flow regulated nitrogen(at 1 to 2 psig)through the low-side refrigeration gauge set into the liquid line service port valve,and out of the suction line service port valve. A- Connect gauge set low pressure side to i liquid line service valve(service port). USE REGULATOR TO FLOW 410 B- Connect gauge set center port to bottle of LOW al HIGH NITROGEN AT 1 TO 2 PSIG. nitrogen with regulator. = 0 — / C- Remove core from valve in suction line - -. - 0 service port to allow nitrogen to escape. ATTACH • • • GAUGES T L Q.'-7�' '-I t i` . SUCTION SERVICE PORT MUST BE OPEN TO WI ALLOW EXIT POINT FOR NITROGEN O SUCTION LINE SERVICE J� VALVE UCTION LINE INDOOR OUTDOOR UNIT -mmaIulh]Ili■ UNIT \ mg�a NITROGEN LIQUID LINE LIQUID LINE SERVICE A WHEN BRAZING LINE SET TO VALVE SERVICE VALVES,POINT FLAME AWAY FROM SERVICE VALVE. FIGURE 8 ACAUTION AWARNING Brazing alloys and flux contain materials which are hazardous to your health. Danger of fire. Bleeding the refrigerant Avoid breathing vapors or fumes from brazing charge from only the high side may result operations. Perform operations only in well-ventilated / in pressurization of the low side shell and areas. , suction tubing. Application of a brazing Wear gloves and protective goggles or face shield to torch to a pressurized system may result protect against burns. in ignition of the refrigerant and oil Wash hands with soap and water after handling brazing mixture. Check the high and low pressures before applying heat. alloys and flux. Page 6 ML14XCI SERIES 4 WRAP SERVICE VALVES To help protect service valve seals during brazing,wrap water-saturated cloths around service valve bodies and copper tube stubs.Use additional water-saturated cloths underneath the valve body to protect the base paint. 5 FLOW NITROGEN Flow regulated nitrogen(at 1 to 2 psig)through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the suction valve stem port.See steps 3A,3B and 3C on manifold gauge set connections. 6 BRAZE LINE SET Wrap both service valves with water-saturated dots as illustrated here and as mentioned in step 4,before brazing to line set.Cloths must remain water-saturated throughout the brazing and cool-down process. LIQUID LINE SERVICE VALVE ,-, 044 / WHEN BRAZING LINE SET TO 6 �� SERVICE VALVES,POINT FLAME e AWAY FROM SERVICE VALVE. r \ Ak IMPORTANT-Allow braze joint to cool.Apply additional water-saturated cloths to help cool brazed joint. Do not 1 WATER-SATURATED remove water-saturated cloths until piping has cooled. CLOTH Temperatures above 250°F will damage valve seals. LIQUID LINE WARNING SUCTION LINE SERVICE AFIRE,PERSONAL INJURY,OR PROPERTY DAMAGE VALVE may result if you do not wrap a water-saturated cloth around both liquid and suction line service valve bodies and copper tube stub while brazing the line set! The braze, when A iiiitcomplete, must be quenched with water to absorb any residual heat. ` Do not open service valves until refrigerant lines and J I WHEN BRAZING LINE SET TO . indoor coil have been leak-tested and evacuated.Refer , SERVICE VALVES,POINT FLAME to Installation and Service Procedures manual found on ' AWAY FROM SERVICE VALVE. LennoxPros.com. a , — • a SUCTION LINE WATER-SATURATED CLOTH 7 PREPARATION FOR NEXT STEP After all connections have been brazed,disconnect manifold gauge set from service ports.Apply additional water-saturated cloths to both services valves to cool piping.Once piping Is cool,remove all water-saturated cloths. FIGURE 8 (CONTINUED) Page 7 ML14XC1 SERIES STEP 2 -- REFRIGERANT PIPING -- Installing Indoor Expansion Valve This outdoor unit is designed for use in systems that use either an fixed orifice (RFC) (included with outdoor unit), or expansion valve metering device (purchased separately) at the indoor coil. See the ML14XC1 Product Specifications bulletin(EHB)for approved expansion valve kit match ups.The expansion valve unit can be installed internal or external to the indoor coil. In applications where an uncased coil is being installed in a field-provided plenum, install the expansion valve in a manner that will provide access for field servicing of the expansion valve. Refer to below illustration for reference during installation of expansion valve unit.After installation of the indoor coil metering device, proceed to Step 5. C- Install one of the provided Teflon®rings around the INDOOR EXPANSION VALVE INSTALLATION stubbed end of the check/expanslon valve and use re- frigerant oil to lightly lubricate the connector threads TWO-PIECE and exposed surface of the Teflon®ring. PATCH PLATE (Uncased Coil Shown) D- Attach the stubbed end of the check/expansion valve 1/2 Turn (UNCASED to the liquid line orifice housing.Finger tighten,ten use STUB COIL ONLY) LIQUID LINEan appropriatelywrenchturn an additional sized to dditil 1/2 ORIFICE END CHECK/ HOUSING EXPANSION turn clockwise as illustrated in the figure to the right,or 11 r DISTRIBUTOR-` \ VALVE tighten to 20 ft-lb. 10 TUBES _ TEFLON® E- Place the remaining Teflon®washer around the other g I 1' (��,, RING end of the check expansion valve. Lightly lubricate 8 7 110 connectorthreads and expose surface of the Teflon® • . ring with refrigerant oil. ..� • ---I �l(( TEFLON®� ' �\ F- Attach the liquid line assembly to the check expansion ('� R\ SENSING valve.Finger tighten,then use an appropriately sized LINE wrench to turn an additional 1/2 turn clockwise as illus- .. traced in the figure above or tighten to 20 ft-lb. DISTRIBUTOR I EQUALIZER ASSEMBLY LINE /"" .` „ ,...... ,[... LIQUID LINE/.111 ASSEMBLY WITH SENSING BULB INSTALLATION p BRASS NUT f, A- Attach the suction line sensing bulb in the proper orien- tation as illustrated below using the clamp and screws MALE EQUALIZER LINE SUCTION provided. FITTING(SEE LINE 40, B- NOTE-Though it Is preferred to have the sensing bulb EQUALIZER LINE installed on a horizontal run of the suction line,installa- INSTALLATION FOR tion on a vertical run of piping is acceptable if necessary. DETAILS) NOTE-Confirm proper thermal contact between the suction 1l8 Turn Sensing bulb insulation is required if line and check/expansion bulb before insulating the sensing check/expansion valve is installed external LIQUID LINE bulb. 1� to the coil casing. See sensing bulb 11 /� installation for bulb positioning. C- Connect the equalizer line from the check/expansion 10 V valve to the equalizer port on the suction line..Finger 9 tighten the flare nut,then tighten an additional 1/8 turn(7 8 4 ft-Ibs)as illustrated to the right. 7 6 5 EQUALIZER LINE INSTALLATION ON,LINES SMALLER THAG SUCTION LINE\ 7/8", MOUNT SENSING -4,„„,-4, BULB AT EITHER THE 3 OR A- Remove and discard either the flare seal cap or flare nut with �,,,m; ',W„ `-- 9 O'CLOCK POSITION. copper flare seal bonnet from the equalizer line port on the suc- 7L-, tion line as illustrated in the figure below. BULB\ B- Remove the field-provided fitting that temporarily reconnected (BULB + BULB the liquid line to the indoor unit's distributor assembly. FLARE SEAL CAPS J Imo"1 FLARE NUT -II^ I^J SUCTION LINE ON 7!8"AND LARGER LINES, MOUNT SENSING BULB AT I OR SEALBONNCOPER FLARET N. EITHER THE 4 OR 8 O'CLOCK c ' \\\3 POSITION. NEVER MOUNT ---- ` ' THE SENSING BULB ON t.t „ e � BOTTOM OF LINE. irmMALE BRASS EQUALIZER «;a"'o, \\ Hu LINE FITTING `BULB ' BULB \yf--- Illllll,lll!!lll/lr SUCTION LINE lli NOTE—NEVER MOUNT SENSING BULB ON BOTTOM OF LINE. FIGURE 9 Page 8 ML14XC1 SERIES • STEP 3 -- LEAK TEST AND EVACUATION LEAK TEST LOW HIGH MANIFOLD GAUGE SET 0 IDI I 45.111 B A �- ■i= t I TO SUCTION ;y SERVICE VALVE � (ANGT P)BALL -II■IrmiloII■I NITROGEN OUTDOOR UNIT HFC-410A 11 CONNECT GAUGE SET A- Connect the high pressure hose of an HFC-410A manifold gauge set to the suction valve service port. NOTE-Normally, the high pressure hose is connected to the liquid line port. However, connecting it to the suction port better protects the manifold gauge set from high pressure damage. B - With both manifold valves closed,connect the cylinder of HFC-410A refrigerant to the center port of the manifold gauge set. NOTE-Later in the procedure, the HFC-410A container will be replaced by the nitrogen container. After the line set has been connected to the indoor and outdoor units, check the line set connections and indoor unit for leaks. Use the following procedure to test for leaks: 2 TEST FOR LEAKS A- With both manifold valves closed,connect the cylinder of HFC-410A refrigerant to the center port of the manifold gauge set. Open the valve on the HFC-410A cylinder(vapor only). B - Open the high pressure side of the manifold to allow HFC-410A into the line set and indoor unit.Weigh in a trace amount of HFC-410A.(A trace amount is a maximum of two ounces (57 g)refrigerant or three pounds (31 kPa) pressure.] Close the valve on the HFC-410A cylinder and the valve on the high pressure side of the manifold gauge set. Disconnect the HFC-410A cylinder. C - Connect a cylinder of nitrogen with a pressure regulating valve to the center port of the manifold gauge set. D - Adjust nitrogen pressure to 150 psig(1034 kPa). Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit. E - After a few minutes, open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector. F - After leak testing, disconnect gauges from service ports. FIGURE 10 Page 9 ML14XC1 SERIES STEP 3 -- LEAK TEST AND EVACUATION (CONTINUED) EVACUATION 3CONNECT GAUGE SET LOW /� 9 9 HIGH NOTE-Remove cores from service valves(if not already done). A- Connect low side of manifold gauge set with 0 1/4 SAE in-line tee to suction line service O valve B- Connect high side of manifold gauge set to MANIFOLD E 1/4 SAE TEE WITH SWIVEL liquid line service valve COUPLER T. GAUGE SET C- Connect available micron gauge connector A on the 1/4 SAE in-line tee. 11 i D- Connect the vacuum pump (with vacuum �• iiiiF417;) t gauge) to the center port of the manifold 11; C r. MICRON TO SUCTION gauge set.The center port line will be used • � __ GAUGE SERVICE VALVE later for both the HFC-410A and nitrogen ll `- - containers. a _ Q OUTDOOR I1,III Io lIIR cm.,.1 NITROGEN UNIT . i I iII 1 HFC-410A B TO LIQUID LINE VACUUM PUMP SERVICE VALVE i aI . t _- RECOMMEND / MINIMUM 3/8"HOSE -- 4 4 D 1 4 EVACUATE THE SYSTEM A- Open both manifold valves and start the vacuum pump. B- Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns(29.01 inches of mercury). NOTE-During the early stages of evacuation,it is desirable to close the manifold gauge valve at least once.A rapid rise in pressure indicates a relatively large leak.If this occurs,repeat the leak testing procedure. NOTE-The term absolute pressure means the total actual pressure above absolute zero within a given volume or system.Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure. C- When the absolute pressure reaches 23,000 microns(29.01 inches of mercury),perform the following: • Close manifold gauge valves. WARNING • Close valve on vacuum pump. • Turn off vacuum pump. Possible equipment damage. • Disconnect manifold gauge center port hose from vacuum pump. Avoid deep vacuum operation. Do not use • Attach manifold center port hose to a nitrogen cylinder with pressure compressors to evacuate a system. regulator set to 150 psig(1034 kPa)and purge the hose. Extremely low vacuum can cause Internal • Open manifold gauge valves to break the vacuum in the line set and arcing and compressor failure. Damage indoor unit. caused by deep vacuum operation will • Close manifold gauge valves. void warranty. D- Shut off the nitrogen cylinder and remove the manifold gauge hose from the cylinder.Open the manifold gauge valves to release the nitrogen from the line set and indoor unit. E- Reconnect the manifold gauge to the vacuum pump,tum the pump on,and continue to evacuate the line set and indoor unit until the absolute pressure does not rise above 500 microns(29.9 inches of mercury)within a 20-minute period after shutting off the vacuum pump and closing the manifold gauge valves. F- When the absolute pressure requirement above has been met,disconnect the manifold hose from the vacuum pump and connect it to a cylinder of HFC-410A positioned to deliver liquid refrigerant.Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and Indoor unit. G- Perform the following: 1/6 TURN • Close manifold gauge valves. I • Shut off HFC-410A cylinder. 11 iTh • Reinstall service valve cores by removing manifold hose from service valve.Quickly 10 install cores with core tool while maintaining a positive system pressure. g • Replace stem caps and finger tighten them,then tighten an additional one-sixth(1/6) 8 4 of a tum as Illustrated. 7 6 FIGURE 11 Page 10 ML14XC1 SERIES STEP 4 -- ELECTRICAL -- Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codes A WARN 1 N G and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC). Fire Hazard. Use of aluminum wire with this product Refer to the furnace or air handler installation instructions may result in a fire, causing property damage, severe for additional wiring application diagrams and refer to unit injury or death. Use copper wire only with this product. nameplate for minimum circuit ampacity and maximum overcurrent protection size. 24VAC TRANSFORMER A CAUTIO N Use the transformer provided with the furnace or air Failure to use properly sized wiring and circuit breaker handler for low-voltage control power (24VAC - 40 VA may result in property damage. Size wiring and circuit minimum) breaker(s) per Product Specifications bulletin (EHB)and A WARNING unit rating plate. Electric Shock Hazard. Can cause injury or death. Unit must be properly grounded in accordance with national and local ©CAUTION codes. Line voltage is present at all components when unit is not in operation on units with Electrostatic discharge can affect single pole contactors. Disconnect all electroniccomponents.Takecareduring remote electric power supplies before unit installation and service to protectthe opening access panel. Unit may have ELECTROSTATIC unit's electronic controls. Precautions multiple power supplies. DISCHARGE will help to avoid control exposure to (ESD) electrostatic discharge by putting the IMPORTANT ! Precautions andoce unit,the control and the technician atthe same dectrostaticpotential.Touch hand i If unit is equipped with a crankcase heater, it should and all tools on an unpainted unit surface be energized 24 hours before unit start-up to prevent beforeperforminganyserviceprocedure compressor damage as a result of slugging. to neutralize electrostatic charge. SIZE CIRCUIT AND INSTALL SERVICE INSTALL THERMOSTAT DISCONNECT SWITCH Install room thermostat(ordered separately)on an inside Refer to the unit nameplate for minimum circuit ampacity, wall approximately in the center of the conditioned area and maximum fuse or circuit breaker (HACR per NEC). and 5 feet(1.5m)from the floor. It should not be installed Install power wiring and properly sized disconnect switch. 'I on an outside wall or where it can be affected by sunlight or drafts. MAIN FUSE BOX/ ji BREAKER PANEL 7I THERMOSTAT 1114 SERVICE / DISCONNECT SWITCH , 11;10 '' __.diii10111 Cil 5 FEET 11110,-\ -� (1.5M) I...,Ith-S-31n a NOTE-Units are approved for use only with copper conductors. Ground unit at disconnect switch or NOTE-24VAC, Class II circuit connections are made connect to an earth ground. in the control panel. FIGURE 12 Page 11 ML14XCI SERIES STEP 4 -- ELECTRICAL (CONTINUED) -- High Voltage and Field Control Wiring The following illustration provide an example of control wiring connections when using standard thermostat. ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING HIGH VOLTAGE/GROUND WIRES FIELD CONTROL WIRING Any excess high voltage field wiring should be THERMOSTAT INDOOR UNIT trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the POWER control panel using a proper conduit fitting. NOTE- Wire tie provides low voltage control wire strain relief and maintains separation of field-installed low and ® HEATGO high voltage circuits. YELLOW OuroOORUNIT NOTE-For proper voltages, select thermostat wire O COOLING 4 (control wires)gauge per table above. • NOTE-Do not bundle any excess 24VAC control wires inside control panel. INDOOR BLOWER Install low voltage wiring from outdoor to indoor unit 0 O BLACK and from thermostat to indoor unit as illustrated. A- Run 24VAC control wires through hole with grommet O COMMON © — N and secure with provided wire tie. <J B - Make 24VAC thermostat wire connections. Locate the two wires from the contactor and make wIRE RUN LENGTH AWG# INSULATION TYPE connection using field-provided wire nuts: LESS THAN 100'(30 METERS) 18 TEMPERATURE RATING • Yellow to Y1 MORE THAN 100'(30 METERS) 16 35°C MINIMUM. • Black to C (common) FIGURE 13 24VAC Control Wiring Diagrams (Field Installed) EL280,Et29S,E1296 STAT7500 FURNACE 7500 STAT ML160 CONEcRTSENSE 0 ——— Q Cr ——— Q FURNACE 5500 STAT © Q Q © — Q --_ S M --- 14ACX © 14ACX ——— ——— m 14ACX m o -- o o n o o © o ILi ® OPTIONAL ® aD. 0 ——— 0 SENSaRR ——— 0 OPTIONAL ® O c265a m ___ 0 ��52658 CI KKK I ® © ® `1-.Y -, -- I -- O INV 10' VW -- v ——— 0 , , CUT W911 R TO 0S 0 J I CUT W914 R TO aS 0 J III OEHUJUMPNIRO.MHEN IS USES.STAT —J DEMPER AND.D.WHEN USES. Q —J CBX4OUHV CONFORTSENSE OSX25 CM] SLOWER COIL 7500 STAT eLOVER BLOWCOK3ER SLOWER COIL COM1FORTSENSE GLOWER COSFORTTCNSE COIL CIX5500 STATFNSE —_—_ �' ___ 0 5500 STAT [OIl 6500 STAT 5500 /�RED IRCEN-6 — Q r1 - Q �' -- M 14ACo —M14ACX 14ACX M 14ACX ® —— u.A. ———— O nt _ __ F IIN 'um — -- D — HIE — 'D -- HHHH --- EEr4D. — - `Y' O DPTION1L II — e �© ___ 0 K2658 mor _ `J — Q R111 O 0 JI NOTE-Refer to furnace,blower coil and accessory instructions for Air handler shipped with Jumpers installed between W 1 and W2 0 — additional wiring configurations with other optional controls. A and W2 and W3. LD2 R connection required for air conditioner with LSOM.Resistor kit (CAT#47W97)required when connecting ComfortSense 7500 with LSOM 2. QL connection wired on units with LSOM. FIGURE 14 Page 12 ML14XC1 SERIES STEP 5 -- UNIT START-UP TABLE 3 TORQUE REQUIREMENTS A IMPORTANT Parts Recommended Torque Service valve cap 8 ft.-lb. 11 NM If unit is equipped with a crankcase heater, it should be Sheet metal screws 16 in.-lb. 2 NM energized 24 hours before unit start-up to prevent compressor damage as a result of slugging. Machine screws#10 28 in.-lb. 3 NM 1 - Rotate fan to check for binding. Compressor bolts 90 in.-lb. 10 NM Gauge port seal cap 8 ft.-lb. 11 NM 2- Inspect all factory- and field-installed wiring for loose connections. A IMPORTANT 3- After evacuation is complete, open the liquid line and suction line service valve stems to release the To prevent stripping of the various caps used, the refrigerant charge (contained in outdoor unit)into the appropriately sized wrench should be used and fitted system. snugly over the cap before tightening. 4 - Replace the stem caps and tighten to the value listed in table 3. Using Manifold Gauge Set 5 Check voltage supply at the disconnect switch. The When checking the system charge, only use a manifold voltage must be within the range listed on the unit's gauge set that features low loss anti-blow back fittings. nameplate. If not, do not start the equipment until you Manifold gauge set used with HFC-410A refrigerant have consulted with the power company and the systems must be capable of handling the higher system voltage condition has been corrected. operating pressures. The gauges should be rated for use 6 - Connect manifold gauge set for testing and charging with pressures of 0 800 psig on the high side and a low using figure 10 as a guideline. side of 30" vacuum to 250 psig with dampened speed to 500 psi. Gauge hoses must be rated for use at up to 800 7- Set the thermostat for a cooling demand. Turn on psig of pressure with a 4000 psig burst rating. power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit. OPERATING BALL-TYPE SERVICE VALVE: 8 - Recheck voltage while the unit is running. Power must 1- Remove stem cap with an appropriately sized wrench. be within range shown on the unit nameplate. 2- Use an appropriately sized wrenched to open.To open valve, 9 - Check system for sufficient refrigerate using the rotate stem counterclockwise 90°. To close rotate stem clockwise 90°. 4 procedures outlined in under System Refrigerant. OPERATING MANIFOLD GAUGE SET AND SERVICE VALVES TO OPEN ROTATE STEM /' BALL(SHOWN COUNTERCLOCKWISE 90°. o The liquid and suction line service valves are used for CLOSED) removing refrigerant, flushing, leak testing, evacuating, TO CLOSE ROTATE STEM VALVE checking charge and charging. CLOCKWISE 90°. '4 /STEM t7. Ci Each valve is equipped with a service port which has a ({ SERVICE PORT factory-installed valve stern. Figures 15 and 16 provide �11.,� information on how to access and operate both angle-and SERVICE PORT _—� / SERVICE PORT '� ball-type service valves. CORE x 1(` Torque Requirements CAP When servicing or repairing heating, ventilating, and air STEM CAP conditioning components, ensure the fasteners are appropriately tightened. Table 3 lists torque values for fasteners. FIGURE 15 Page 13 ML14XC1 SERIES OPERATING ANGLE-TYPE SERVICE VALVE: Checking and Adding System Charge 1 - Remove stem cap with an appropriately sized wrench. The ML14XC1 unit is factory-charged with enough 2- Use a service wrench with a hex-head extension(3/16"for liquid HFC-410A refrigerant to accommodate a 15-foot length of line valve sizes and 5/16"for suction line valve sizes)to back the refrigerant piping. Charge should be checked and adjusted stem out counterclockwise as far as it will go. using the tables provided on the charging procedure SERVICE PORT CAP sticker located on the unit access panel. Detailed 4/ SERVICE PORT CORE information is provided in the ML14XC1 Installation and r. Service Procedures manual (Corp1502-L7), which is it (VALVE STEM SHOWN OPEN) available on LennoxPros.com. �� INSERT HEX WRENCH HERE 0111 �;�.`�� Homeowner Information Illi `�� ANGLE-TYPEERVICE VALVE STEM CAP A CA U T I O N (BACK-SEATED OPENED) Before attempting to perform any service or mainte- When service valve is OPEN,the service port is nance, turn the electrical power to unit OFF at dis- open to line set,indoor and outdoor unit. connect switch. PIn order to ensure peak performance,your system must be (VALVE STEM SHOWN CLOSED) properly maintained. Clogged filters and blocked airflow ®, INSERT HEX WRENCH HERE prevent your unit from operating at its most efficient level. Miry � The system should be inspected and serviced before each 1� "10 cooling season by a licensed professional HVAC service �� ANGLE TYPE SERVICE VALVE J �, (FRONT-SEATED CLOSED) technician Orequivalent). 40 Homeowner Maintenance The following maintenance may be performed by the When service valve is CLOSED,the service port is homeowner. open to the line set and indoor unit. • Contact a licensed professional HVAC technician to NOTE-A label with specific torque requirements may be affixed to the schedule a yearly inspection and maintenance stem cap.If the label is present,use the specified torque. appointment for your equipment. • Check the indoor unit filter each month and replace the FIGURE 16 filter, if necessary. Have your Lennox dealer show you where your indoor , unit filter is located. It will be either at the indoor unit TO ACCESS SERVICE PORT: (installed internal or external to the cabinet)or behind a A service port cap protects the service port core from contamination return air grille in the wall or ceiling. Check the filter and serves as the primary leak seal. monthly and clean or replace it as needed. 1- Remove service port cap with an appropriately sized wrench. Disposable filters should be replaced with a filter of the 2- Connect gauge set to service port. same type and size. 3- When testing is completed,replace service port cap and tighten as • Check the indoor unit drain line for obstructions monthly follows: during the cooling season. • With torque wrench: Finger tighten and 1/6 TURN The indoor evaporator coil is equipped with a drain pan torque cap per table 3. I -� to collect condensate formed as your system removes • Without torque wrench:Finger tighten and 1011 1 �i humidity from the inside air. Have your dealer show you use an appropriately sized wrench to turn an additional 1/6 turn clockwise. 9 the location of the drain line and how to check for a obstructions. (This would also apply to an auxiliary drain, 6 T 6 6 if installed.) Reinstall Stem Cap: • Check the area around the outdoor unit monthly and Stem cap protects the valve stem from damage and serves as the remove any obstructions that may restrict airflow to the primary seal.Replace the stem cap and tighten as follows: outdoor unit.This would include grass clippings, leaves, 1/12 TURN or papers that may have settled around the unit. • With Torque Wrench:Finger lighten and then torque cap per table 3. 1�/ • Trim shrubbery away from the unit and periodically check • Without Torque Wrench: Finger11 Q '1 for debris which collects around the unit. lighten and use an appropriately t0 I T 2 3 • During the winter months, keep the snow level below the 9 sized wrench to turn an addition- Y louvered panels. al 1/12 turn clockwise. 8 4 7 6 6 NOTE- The filter and all access panels must be in place any time the unit is in operation. If you are unsure about the filter required for your system, call your Lennox dealer for FIGURE 17 assistance. Page 14 ML14XC1 SERIES IMPORTANT ! 7- Check outdoor fan motor for worn bearings/bushings. Replace as necessary. Sprinklers and soaker hoses should not be installed where they could cause prolonged exposure to the 8 - Inspect and clean outdoor coils, if necessary and note outdoor unit by treated water. Prolonged exposure any damage to coils or signs of leakage. of the unit to treated water(i.e., sprinkler systems, soakers, waste water, etc.) will corrode the surface NOTICE ! of steel and aluminum parts, diminish performance and affect longevity of the unit. Failure to follow instructions will cause damage to the unit. Thermostat Operation This unit is equipped with an aluminum coil. Alu- minum coils may be damaged by exposure to solu- See the thermostat owners manual for instructions on how tions with a pH below 5 or above 9. The aluminum to operate your thermostat. coil should be cleaned using potable water at a mod- Pre-Service Check erate pressure (less than 50psi).If the coil cannot be If your system fails to operate, check the following before cleaned using water alone, Lennox recommends calling for service: use of a coil cleaner with a pH in the range of 5 to 9. • Verify room thermostat settings are correct. The coil must be rinsed thoroughly after cleaning. In coastal areas, the coil should be cleaned with • Verify that all electrical disconnect switches are ON. potable water several times per year to avoid corro- • Check for any blown fuses or tripped circuit breakers. sive buildup (salt). • Verify unit access panels are in place. Indoor Unit (Air Handler or Furnace) • Verify air filter is clean. 1 - Inspect component wiring for loose,worn or damaged • If service is needed, locate and write down the unit connections. Confirm proper voltage plus amperage model number and have it handy before calling. indoor unit. Professional Maintenance 2- Inspect and clean or replace air filters in indoor unit. Your heating and air conditioning system should be inspected and maintained yearly (before the start of the 3- Check the cleanliness of indoor blower and clean cooling and heating seasons) by a licensed professional blower, if necessary. HVAC technician.You can expect the technician to check the following items. These checks may only be 4- Inspect the evaporator coil (Indoor) drain pans and conducted by a licensed professional HVAC condensate drains for rust, debris, obstructions, leaks technician. or cracks. Pour water in pans to confirm proper Outdoor Unit drainage from the pan through to the outlet of the pipe. 1 - Inspect component wiring for loose,worn or damaged Clean or replace as necessary. connections.Also check for any rubbing or pinching of 5- Inspect and clean evaporator (indoor) coil, if wires. Confirm proper voltage plus amperage outdoor necessary. unit. 6- Inspect the condition of the refrigerant lines and 2 - Check the cleanliness of outdoor fan and blade confirm that pipes are not rubbing copper-to-copper. assemblies. Check condition of fan blades (cracks). Also, ensure that refrigerant pipes are not being Clean or replace them, if necessary. affected by indoor air contamination. Check condition of insulation on the refrigerant lines. Repair, correct, or 3- Inspect base pan drains for debris and clean as replace as necessary. necessary. 7 - Inspect the duct system for leaks or other problems. 4- Inspect the condition of refrigerant piping and confirm Repair or replace as necessary. that pipes are not rubbing copper-to-copper. Also, check the condition of the insulation on the refrigerant 8 - Check for bearing/bushing wear on indoor blower lines. Repair, correct, or replace as necessary. motor. Replace as necessary. 5 - Test capacitor. Replace as necessary. 9- Indoor unit inspections of gas-or oil-fired furnaces will also include inspection and cleaning of the burners, 6 - Inspect contactor contacts for pitting or burn marks. and a full inspection of the gas valve, heat exchanger Replace as necessary. and flue (exhaust) system. Page 15 ML14XG1 SERIES General System Test with System Operating charge per the charging sticker information on the 1 - Your technician should perform a general system test. outdoor unit. He will turn on the air conditioner to check operating functions such as the start-up and shut-off operation. 2- Verify that system total static pressure and airflow He will also check for unusual noises or odors, and settings are within specific operating parameters. measure indoor/outdoor temperatures and system pressures as needed. He will check the refrigerant 3- Verify correct temperature drop across indoor coil. ML14XC1 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Rated Load Amps: Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps:_ COOLING MODE Suction Pressure: Liquid Pressure: Supply Air Temperature: Ambient Temperature:_ Return Air: Temperature: System Refrigerant Charge (Refer to manufacturer's information on unit or installation instructions for required subcooling and approach temperatures.) Subcooling: A — B = SUBCOOLING Saturated Condensing Temperature (A) minus Liquid Line Temperature (B) Approach: A — B = APPROACH Liquid Line Temperature (A) minus Outdoor Air Temperature (B) Indoor Coil Temperature Drop (18 to 22°F) A — B = COIL TEMP DROP Return Air Temperature (A) minus Supply Air Temperature (B) Page 16 ML14XC1 SERIES