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Report (16) GAS FURNACES - SOHZs� ENGINEERING DATA Aloft,4e1:14'. �� - ,� G24M SERIES G24M%esL.4� . ip�litui_� ; � v - ---T_Jr MULTI-POSITION GAS FURNACES i Req o� —�AL o"p\� 10.5 to 32.8 kW (36 000 to 112 000 Btuh) Output Bu0045 Jatnuaryin 911999 3.5 thru 17.6 kW (1-1/2 thru 5 Tons) Add-on Cooling Capacity DecSuper1996 sedes e,iii Typical Applications �llip rAi �®T l i I ,l l ' mo AI ' , Up-Flow Utility Room Installation ''''''''': 77....,..,v!H''' '''''''' tt With Cooling Coil and Automatic Humidifier UP-FLOW POSITION iti1 ;4;:i,A.':, :;;::: - ! ":„7:7:-:',24.7:-.:,:ii::.'1: ;:4 ' •44,,,,,,,,,44....006.41‘%v, i ,,z.t.,..,;:".4,,04,,,,,,,,,, r T. littlariii74*"' 14"*"4' '''''''''',‘;,'si,',' * 1:11: ';;,,\,',.'' , ;",10*,,'---- rfr460,H /11iitg,I‘ I� HORIZONTAL POSITION Applications �' / •G24M series gas fired furnaces include eight models(natural gas or propane)with input capacities of 13.2, 17.6, 22.0,29.3, 35.2 and 41.0 kW(45 000,60 000, 75 000, 100 000, 120 000 and 140 000 Btuh). Down-Flow Closet Installation •Up-flow,down-flow or horizontal a lications. With Cooling Coil •L nnox add-on evaporator coils,electronic air cleaners and power humidifiers can be easily added to.the furnace. •Units are shipped factory assembled with all controls installed and wired. •Each unit is factory test operated to insure proper operation. �` Tubular Aluminized Steel Heat Exchanger �•F.I! ��� •Constructed of aluminized steel for superior resistance to corro- /4ilk i l I%� sion and oxidation.1111111 O s •Curvingdesignallows completeG� 111111EI 1!111!11 �'�• �� roil owl 11111 our a o • �,� exposure of heating surfaces to �� ' supply air stream. �,/ CA";2•-,.--,LI •Round surfacescreate minimum '- air resistance and allow air to sur- \ round all surfaces for excellent Horizontal Attic Installation heat transfer. With Cooling Coil,Electronic Air Cleaner P and Automatic Humidifier ®o • e requirementsCompact indesign unit cabinet.reducs space •ratoryHeat lifeexchangercycle hastested.been labo- Oi ©7999 Lennox Industries Inc. -:"` NOTE—Due to Lennox'ongoing committment to quality,Specifications,Ratings and Dimensions subject to change without notice and without incurring liability. "` FEATURES Induced Draft Blower Multi-Position Capability •Induced draft blower prepurges heat exchanger and safely •Shipped for up-flow applications and horizontal applications vents flue products. with right hand or left hand air discharge. •Blower is controlled by the furnace control center board for a pre- •For down-flow applications, interchange top and bottom caps, purge cycle(15 seconds)and a post purge cycle(5 seconds). remove heat exchanger section, rotate 180°top for bottom and •Pressure switch proves blower operation before allowing gas re-install. valve to open. •Induced draft blower operates only during heating cycle. Flame Rollout Switches Inshot Burners •Dual manual reset switches are furnished as standard and are •Aluminized steel inshot burners provide efficient trouble free factory installed on either side of the burner box. operation. •Switches prevent unit operation in the event combustion prod- •Burner venturi mixes air and gas in correct proportion for proper ucts passage through the flueway is reduced or blocked. combustion. •Burner assembly is removeable from the unit as a single com- ponent for ease of service and each burner may be removed Limit Controls individually. •Factory installed and accurately located limit controls provide Gas Control Valve protection from abnormal operating conditions. •24 volt redundant combination gas control valve combines a •Primary limit is located on heating compartment vestibule panel. manual main shutoff valve, pressure regulation and automatic *Two secondary limits are located on either side of the blow electric valve(dual)into one compact combination control. er housing. •If the limits fail 5 times during an unsatisfied thermostat demand, Direct Spark Ignition the control will default to the 60 minute"Watchguard"mode. •Solid-state electronic direct spark ignition control provides posi- •The Watchguard circuit automatically resets ignition control tive and safe main burner ignition. after one hour of continuous thermostat demand, eliminating •Spark is intermittent and occurs only when required. nuisance service calls. •Separate electronic flame sensor control assures safe and reli- able operation. Furnace Control Center Board •Should loss of flame occur during ignition or heating operation, •Furnished and factory installed on interior blower access door. the control will initiate 5 tries at re-ignition before defaulting to •Solid-state board contains all necessary controls and relays to "lock-out"mode."Lock-out"can be manually reset by powering operate blower,gas valve,combustion air blower and ignition. unit off,then on. •Board also monitors flame, limit and gas valve operation. •Ignition control has light emitting diode (LED)to indicate status •Fan control consists of blower timed-off delay(adjustable from and as an aid in troubleshooting. 60 to 120 seconds,factory set at 180 seconds)and non-adjust- Cabinet able blower timed-on delay(45 seconds). •Constructed of heavy gauge,cold rolled steel with a primed and •For air-conditioning applications, blower is automatically ener- pre-painted topcoat finish. gized on thermostat demand for cooling. •Cabinet surface temperatures are low due to foil faced fiber- •Continuous low speed blower operation is furnished on board. glass insulation on side and back panels of heat section. *Also included is a low voltage terminal strip for thermostat con- •Blower section is completely insulated with mat faced fiberglass nections. insulation. *Two diagnostic LED's are furnished on board as an aid in serv- •Complete service access is accomplished by removing one piece icing the system. front panel and interior blower access door. •Two 240 volt accessory terminals are provided on control board •Blower assembly may be completely removed from unit for service. for operation of accessories during unit operation. •Safety interlock switch located on blower access door automati- cally shuts off power to the unit when door is removed. Transformer •Gas piping inlets are provided in both sides and top of cabinet. •24 volt control transformer is furnished as standard equipment •Electrical knockouts are provided in both sides,top and bottom and is factory installed on control panel. of cabinet. •Units have flanges on top and bottom of cabinet that may be bent out for duct connection to unit.See dimension drawing. Direct Drive Blower •Painted panel is furnished to block off bottom air return air. Re- •Units are equipped with quiet multi-speed direct drive blower. turn air entry is possible on either side or bottom of cabinet for •Each blower assembly is statically and dynamically balanced. up-flow applications. End return air entry is available for horizon- •Multiple-speed leadless motor is resiliently mounted. tal applications. •See blower performance tables. OPTIONAL ACCESSORIES-MUST BE ORDERED EXTRA Propane Conversion Kit(Optional) Down-Flow Filter Rack(Optional) •For propane models a conversion kit is required for field *Available for field installation in down-flow applications. changeover from natural gas. •Filters are not furnished and must be ordered extra.See Speci- •Kit is not furnished and must be ordered extra.See specifica- fications table for filter sizes and filter rack order number. tions table for order number. Thermostat(Optional) Hanging Bracket Kit(Optional) •Heating thermostat is not furnished and must be ordered extra. *Installed kit LB-69957(46J66)available for easy suspension of See Thermostat bulletin and Lennox Price Book. unit in horizontal applications. •For all-season applications, heating and cooling thermostat is •Includes four vertical supports for mounting to joists and two available with the condensing unit. horizontal channels. Up-flow/Horizontal Filter Kit(Optional) •Cleanable polyurethane or aluminum mesh type air filter and Down-Flow Combustible Floor Base(Optional) external rack available for field installation. *Additive base is required for field installation with heating only, •Includes adjustable filter rack with access door,filter removal tool down-flow units installed on combustible floors. Not required in for bottom return air applications and filter.Available in ten packs. add-on cooling applications. See Specifications table for filter sizes and catalog numbers. •See Specifications table and dimension drawing. G24M 50 hz/Page 2► SPECI FICATIONS Model Number G24M2-45 G24M3-60 G24M2/3-75 G24M4-75 Input—kW(Btuh) 13.2(45 000) 17.6(60 000) 22.0(75 000) 22.0(75 000) Output—kW(Btuh) , 10.5(36 000) 14.1 (48 000) 17.6(60 000) 17.6(60 000) Flue size connection diameter—mm(in.)round 76(3) 102(4) Temperature rise range—°C(°F) 22-39(40-70) 117-34(30-60) 122-39(40-70) 17-34(30-60) Maximum external static pressure—Pa(in w.g.) 125(0.50) Gas connection—iron pipe size mm 13 Natural or propane in 1/2 Blower wheel nominal mm 229 x 178 254 x 178 305 x 203 diameter x width in. 9 x 7 10 x 7 12x8 Blower motor output—W(hp) 187(1/4) 224(1/3) 373(1/2) Nominal cooling I kW 3.5,5.3 or 7.0 7.0,8.8 or 10.6 7.0,8.8, 10.6,12.3 or 14.1 that can be added Tons 1,1-1/2 or 2 2,2-1/2 or 3 2,2-1/2,3,3-1/2 or 4 Shipping weight—kg(lbs.)1 package 59(130) 61 (135) 64(140) Electrical characteristics 240 volts—50 hertz—1 phase(all models) Optional Accessories(Must Be Ordered Extra) Propane kit LB-69845L(38K84) Up-Flow/Horizontal Filter and Filter Rack Kits Polyurethane Ten Pack(66K64) $Number and size of filters-mm(in.) Aluminium Mesh Ten Pack(74K68) (1)406 x 508 x 25(16 x 20 x 1) tL Down-Flow Catalog No. LB-69843A(32J01)—1 kg(3 lbs.) Filter Rack Number and Size of Filters-mm(in) (2)406 x 508 x 25(16 x 20 x 1) Down-flow Combustible Floor Base LB-79239A(67J91)—4 kg(10 lbs.) Hanging Bracket Kit LB-69957(46J66)—8 kg(15 lbs.) tCleanable frame type filter furnished with kit. II Filter rack for down-flow applications is not furnished and must be ordered extra.Filters are not furnished with rack and must be ordered extra. SPECIFICATIONS Model Number G24M3/4-100 G24M4/5-100 G24M4/5-120 G24M4/5-140 Input—kW(Btuh) 29.9(102 000) 29.9(102 000) 35.2(120 000) 41.0(140 000) Output—kW(Btuh) 23.9(81 600) 23.9(81 600) 28.1 (96 000) 32.8(112 000) Flue size connection diameter-mm(in.)round 102(4) Temperature rise range—°C(°F) 25-42(45-75) 22-39(40-70) 25-42(45-75) 31-47(55-85) Maximum external static pressure—Pa(in.w.g.) 125(0.50) Gas connection—iron pipe size mm 13 Natural or propane in. 1/2 Blower wheel nominal mm 305 x 203 305 x 229 diameter x width in. 12 x 8 12 x 9 Blower motor output—W(hp) 373(1/2) Nominal cooling kW 7.0,8.8, 10.6,12.3 or 14.1 12.3,14.1 or 17.6 that can be added Tons 2,2-1/2,3,3-1/2 or 4 3-1/2,4 or 5 Shipping weight—kg(lbs.)1 package 79(175) 86(190) Electrical characteristics 240 volts—50 hertz—1 phase(all models) Optional Accessories(Must Be Ordered Extra) Propane kit LB-69845K(81J14) Polyurethane Up-Flow/Horizontal Filter and Filter Rack Kits Polyurethane Ten Pack(66K65) Ten Pack(66K66) Aluminum Mesh Ten Pack Aluminium Mesh $Number and size of filters-mm(in.) (74K69) Ten Pack(74K70) (1)508 x 508 x 25(20 x 20 x 1) (1)508 x 508 x 25 (20 x 20 x 1) Catalog No. LB-69843A(32J01)—1 kg(3 lbs.) E Down-Flow Filter Rack Number and Size of Filters- mm(in.) (2)406 x 508 x 25(16 x 20 x 1) Down-flow Combustible Floor Base LB-79239B(67J92)—4 kg(10 lbs.) LB-79239C(67J93) —5 kg(12 lbs.) Hanging Bracket Kit LB-69957(46J66)—8 kg(15 lbs.) tCleanable frame type filter furnished with kit. 0 Filter rack for down-flow applications is not furnished and must be ordered extra.Filters are not furnished with rack and must be ordered extra. G24M 50 hz/Page 3► I INSTALLATION CLEARANCES I UP-FLOW OR DOWN-FLOW HORIZONTAL Vent Type Type"C" Type"B1" Vent Type Type"C" Type"B1" Sides 25 mm(1 inch) 25 mm(1 inch) Sides 51 mm(2 inches) 51 mm(2 inches) Rear 25 mm(1 inch) 25 mm(1 inch) Rear 25 mm(1 inch) 25 mm(1 inch) Top 25mm(1 inch) 25 mm(1 inch) Top 25mm(1 inch) 25mm(1 inch) CFront E51 mm(2 inches) 051 mm(2 inches) Floor(up-flow) Combustible Combustible OFront [i51 mm(2 inches) [i51 mm(2 inches) [.Floor(down-flow) C'Combustible [iCombustible Floor 0 mm(0 inches) 0 mm(0 inches) Flue 152 mm(6 inches) 25 mm(1 inch) Flue 152 mm(6 inches) t25 mm(1 inch) NOTE-Air for combustion and supply air ventilation must conform to local codes NOTE-air for combustion and supply air ventilation must conform to local codes Mi Front clearance for alcove installations is 610 mm(24 inches). ❑i Front clearance for alcove installations is 610 mm(24 inches). ©Down-flow Applications Only—Clearance for installation on combustible floor if op- tional additive base is installed between the furnace and the combustible floor.Not re- quired in add-on cooling applications if installed in accordance with local codes. HIGH ALTITUDE DEBATE , Units must be derated when installed at an elevation of more than 610 m(2000 feet)above sea level. If unit is installed at an altitude higher than 610 m(2000 feet),the unit must be derated 4%for every 305 m(1000 feet)above sea level.Thus,at an altitude of 1210 m(4000 feet), the unit would require a derate of 16%. NOTE-This is the only permissible manufacture's derate for these units. L BLOWER DATA I G24M2-45 BLOWER PERFORMANCE External Static Air Volume at Various Blower Speeds Pressure High Medium-High Medium-Low Low Pa in.w.g. L/s cfm L/s cfm L/s cfm L/s cfm 0 0 545 1150 510 1080 440 935 385 820 12 0.05 530 1125 495 1050 435 925 380 810 25 0.10 520 1100 480 1020 425 905 375 800 37 0.15 500 1060 470 995 420 890 370 790 50 0.20 485 1025 450 955 410 865 365 775 62 0.25 465 990 440 930 395 840 355 750 75 0.30 445 945 425 900 380 805 345 730 100 0.40 400 850 380 800 345 730 310 660 125 0.50 350 745 330 700 305 645 275 585 150 0.60 290 610 265 560 210 450 170 365 NOTE—All air data is measured external to unit with 25mm(1 in.)cleanable foam filter(not furnished)in place.Also see Filter Air Resistance table G24M3-60 AND G24M2/3-75 BLOWER PERFORMANCE External Static Air Volume at Various Blower Speeds Pressure High Medium Low Pa in.w.g. L/s cfm L/s cfm L/s cfm 0 0 630 1340 525 1110 380 810 12 0.05 625 1325 520 1100 380 805 25 0.10 615 1305 515 1090 375 800 37 0.15 605 1285 505 1065 370 790 50 0.20 595 1260 495 1050 365 780 62 0.25 590 1250 490 1035 360 760 75 0.30 585 1240 480 1020 350 745 100 0.40 565 1200 465 985 335 710 125 0.50 555 1175 455 960 325 685 150 0.60 540 1140 440 930 310 655 175 0.70 515 1095 415 880 290 615 NOTE—All air data is measured external to unit with 25mm(1 in.)cleanable foam filter(not furnished)in place.Also see Filter Air Resistance table G24M 50 hz/Page 4 BLOWER DATA I G24M4-75 AND G24M3/4-100 BLOWER PERFORMANCE External Static Air Volume at Various Blower Speeds Pressure High Medium Low Pa in.w.g. Us cfm L/s cfm L/s cfm 0 0 850 1800 735 1560 620 1310 12 0.05 830 1760 730 1550 615 1305 25 0.10 520 1735 720 1525 615 1300 37 0.15 800 1695 705 1495 610 1295 50 0.20 780 1655 690 1460 610 1290 62 0.25 765 1625 680 1440 600 1270 75 0.30 745 1580 670 1415 590 1255 100 0.40 710 1500 635 1350 570 1205 125 0.50 660 1400 595 1265 545 1150 150 0.60 620 1315 560 1190 510 1080 175 0.70 565 1200 520 1100 570 1000 NOTE—All air data is measured external to unit with 25mm(1 in.)deanable foam filter(not furnished)in place.Also see Filter Air Resistance table G24M4/5-100,G24M4/5-120 AND G24M4/5-140 BLOWER PERFORMANCE External Static Air Volume at Various Blower Speeds Pressure High Medium Low Pa in.w.g. L/s cfm L/s cfm L/s cfm 0 0 965 2050 730 1545 590 1250 12 0.05 960 2035 725 1540 590 1250 25 0.10 955 2020 720 1530 590 1250 37 0.15 945 2000 715 1520 585 1245 50 0.20 940 1980 710 1500 585 1245 62 0.25 925 1955 700 1485 585 1245 75 0.30 910 1930 695 1475 585 1240 100 0.40 895 1895 680 1445 580 1230 125 0.50 870 1845 660 1400 560 1190 150 0.60 840 1780 635 1345 535 1135 175 0.70 800 1700 600 1270 500 1060 NOTE—All air data is measured external to unit with 25mm(1 in.)deanable foam filter(not furnished)in place.Also see Filter Air Resistance table FILTER AIR RESISTANCE POLYURETHANE ALUMINUM MESH L/s(cfm) Pa(in.w.g.) L/s(cfm) Pa(in.w.g.) 0(0) 0(0.00) 0(0) 0(0.00) 95(200) 2(0.01) 95(200) 0(0.00) 185(400) 7(0.03) 185(400) 2(0.01) 280(600) 10(0.04) 280(600) 7(0.03) 375(800) 15(0.06) 375(800) 12(0.05) 470(1000) 22(0.09) 470(1000) 16(0.07) 560(1200) 30(0.12) 560(1200) 21 (0.09) 655(1400) 37(0.15) 655(1400) 26(0.11) 750(1600) 47(0.19) 750(1600) 31 (0.13) 845(1800) 57(0.23) 845(1800) 36(0.15) 935(2000) 67(0.27) 935(2000) 41 (0.17) G24M 50 hz/Page 5► DIMENSIONS- MM(INCHES) UP-FLOW POSITION SHOWN GAS PIPING 51(2) ELECTRICAL INLETS INLET (Top&25ttom) A i i (1) D ❑r 495 —i 25 � i (19-1/2) , (1) 483 25 FLUE –` � H (19) (1) OUTLET I I 1 C ©SUPPLY• i 105 (4-1/4) � [1[1[1E" ......—OPENING _ ONOTE-Supply air opening at rear and sides of cabinet is \ equipped with a 19 mm(3/4 inch)flange that may be #25 bent out 90°for plenum connection.Dimensions (1) shown are after flange is bent out, Flange at front of supply air opening may be bent out for TOP VIEW a total opening dimension(front to rear)of either 495 mm (19-1/2 inches)or 483 mm(19 inches). IN A752 Ili (29-5/8) 51 (2) AIR FLOW 1 , ' f F Left Side r______.) r ' > G Right Side z GAS PIPING r1 f i f a INLET f ' ' .-','. i (Both Sides) t a r t l L :l .I ,' f \ (-------1. ! :\ I \: / 1' F Z I 'y,: L 'S I ) l 1'. B 00 ELECTRICAL L I [1 INLETS (Both Sides) {� 495 25 I ' r � (19-1/2) (1) ✓ a / ' r ' 3891 RETURN AIR r• i r 't , (15) KNOCKOUT ' a r r. = I (Either Side) I• -, ,t r \ ©NOTE- Return air opening is equipped 4 19(3/4) Return Air with a 19 mm(3/4 inch)flange 25Hilioi �C 25 that may be bent out 90°for ©495 Return Air 25 (1) Opening (1) plenum connection.Dimensions (19-1/2) Opening (1) shown are after flange is bent out, FRONT VIEW SIDE VIEW Model Number A B C D E F G G24M2-45 mm 432 921 381 171 62 114 254 G24M3-60 G24M2-7in. 17 36-1/4 15 6-3/4 2-7/16 6-1/2 12 G24M4-75 G24M3/4-100 mm 521 991 470 213 108 203 343 G24M4/5-100 • G24M4/5-120 in. 20-1/2 39 18-1/2 8-3/8 4-1/4 8 13-1/2 mm 591 991 540 248 108 203 343 G24M4/5-140 • in. 23-1/4 39 21-1/4 9-3/4 4-1/4 8 13-1/2 G24M 50 hz/Page 6► I OPTIONAL ACCESSORY DIMENSIONS- MM(INCHES) I 51 G24M (2) FURNACE SUPPLY AIR 4 . . OPENING B 498 _ jr (19-5/8) 40.000000,* 51 Ali (2) i'N'44**%..%.'410/.. DOWN-FLOW I COMBUSTIBLE FLOOR BASE 664 (26-1/8)-MP' Opening (2) 4 II51 I I fliiiii Furnace A B Model Number mm in. mm in. G24M2-45 G24M3-60 486 19-1/8 384 15-1/8 G24M2/3-75 G24M4-75 G24M3/4-100 G24M4/5-100 572 22-1/2 470 18-1/2 G24M4/5-120 G24M4/5-140 641 25-1/4 540 21-1/4 G24M 50 hz/Page 7 lo-