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G A S F U R N A C E S
G43UF
®
MERIT SERIES
Up−Flow
E N G I N E E R I N G D A T A Bulletin No. 210394
August 2005
Supersedes December 2004
AFUE − up to 92.1%
Input − 44,000 to 132,000 Btuh
Nominal Add−on Cooling − 2 to 5 Tons
MODEL NUMBER IDENTIFICATION
G 43 UF−B 24 − 045
Unit Type
G = Gas Furnace
Nominal Gas Heat Input
Series
045 = 44,000 Btuh (12.9 kW)
43 = 90% Minimum AFUE
070 = 66,000 Btuh (19.3 kW)
090 = 88,000 Btuh (25.8 kW)
Configuration
110 = 110,000 Btuh (32.2 kW)
UF = Up−Flow
135 = 1
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FEATURES CONTENTS Blower Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 13−15 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 9−12 Exhaust Pipe Venting Information . . . . . . . . . . . . . . . . . . . Page 7 B Features and Options . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 2−4 Filter Air Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8 High Altitude Information . . . . . . . . . . . . .
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FEATURES OPTIONS HEATING SYSTEM B ® Lennox Duralok Plus Heat Exchanger Assembly High Altitude Orifice Kit − Natural Gas Only Lennox developed heat exchanger assembly consists of primary Required for all natural gas models for proper unit operation at heat exchanger and secondary condenser coil assembly. altitudes of 7501 to 10,000 feet (2286 to 3048 m). Main 3-pass clamshell type heat exchanger constructed of Proper orifice for LPG/Propane models is included with heavy−gauge, aluminized steel. L
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FEATURES OPTIONS FILTER (NOT FURNISHED) Filter and provisions for external mounting must be field Condensate Drain Heat Cable Kits provided. Self-limiting wattage heat cable prevents condensate drain from OPTIONS freezing in unconditioned areas. Available in 6, 24 or 50 ft. (1.8, 7.3, or 15.2 m) lengths. Air Filter and Rack Kit for Side Return Air Applications (Not for use with RAB Return Air Base) Heat Cable Tape: Washable or vacuum cleanable polyurethane frame type filter 66 ft. (20 m) length
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SPECIFICATIONS Gas ModelNo. G43UF G43UF G43UF G43UF G43UF Heating −24B−045 −24B−070 −36B−070 −36C−090 −36C−090H Performance Canada Only Input− Btuh (kW) 44,000 (12.9) 66,000 (19.3) 66,000 (19.3) 88,000 (25.8) 88,000 (25.8) Output− Btuh (kW) 40,300 (11.8) 61,000 (17.9) 62,000 (18.2) 82,000 (24.0) 81,000 (23.7) Temperature rise range − F (C) 30 − 60 50 − 80 40 − 70 40 − 70 50 − 80 (18 − 36) (28 − 44) (22 − 39) (22 − 39) (28 − 44) 1 AFUE 92.1% 90.0% 92.1% 92.1% 90.0% Highstatic(CSA)− in.
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OPTIONAL ACCESSORIES − MUST BE ORDERED EXTRA B" Width Models C" Width Models D" Width Models FILTER KITS 1 Horizontal (end) Size of filter − in. 87L96 − 18 x 25 x 1 87L97 − 20 x 25 x 1 87L98 − 25 x 25 x 1 Air Filter and Rack Kit (mm) (457 x 635 x 25) (508 x 635 x 25) (635 x 635 x 25) Single 44J22 44J22 44J22 Side Return Ten Pack 66K63 66K63 66K63 Size of filter − in. (mm) 16 x 25 x 1 16 x 25 x 1 16 x 25 x 1 (406 x 635 x 25) (406 x 635 x 25) (406 x 635 x 25) EZ Filter Base Catalog No. − Shi
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EXHAUST PIPE VENTING TABLE 1 Maximum Equivalent Vent Length − One or Two Pipe Applications 2 Vent Size G43UF−24B−070 G43UF−36C−090 G43UF−48C−110 3 Altitude G43UF−24B−045 G43UF−60D−135 2 (diameter) () G43UF−36B−070 G43UF−48C−090 G43UF−60C−110 ft. mft. mft. mft. mft. m 0 − 2000 ft. 2 in. 110 34 70 21 50 15 30 9 n/a n/a (0 (0 − 609 m) 609 ) 2−1/2 in. 135 41 135 41 100 31 70 21 n/a n/a 4 4 3 in. 160 49 160 49 125 38 125 38 125 38 4 in. 250 76 250 76 225 69 200 61 180 55 2001 − 4500 ft. 2 in. 110 3
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FILTER AIR RESISTANCE HIGH ALTITUDE INFORMATION For 1 Inch (25 mm) Cleanable Filter (Field Provided) Pressure regulator adjustment may be required depending on altitude. See below for proper pressure regulator setting. cfm L/s in. w.g. Pa Manifold Pressure 0 0 0.00 0 (Outlet) 200 95 0.01 0 in. w.g. (kPa) Fuel Altitude − ft. (m) 400 190 0.03 5 Natural 0−4500 (0−1372) 3.5 (0.87) 600 285 0.04 10 2 4501−7500 (1373−2286) 3.5 (0.87) 800 380 0.06 15 1,2 7501−10000 (2287−3048) 3.5 (0.87) 1000 470 0.09
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DIMENSIONS − INCHES (MM) 1 NOTE − 60C and 60D size units that require air volumes over 1800 cfm (850 L/s) must have one of the following: a. Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. Required to SUPPLY AIR maintain proper air velocity. OPENING b. Single side return air with optional RAB Return Air Base c. Bottom return air. d. Return air from both sides. e. Bottom and one side return air. See Blower Performance Tables for additional
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OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) RAB RETURN AIR BASE (Up−Flow Applications Only) For use with B, C, and D size furnaces only 4 (102) CONDENSATE 1 23 (584) 4 TRAP Overall 1 Minimum (102) (Maximum) 14 14 11 (279) 1 2 (356) (356) Maximum 18−1/2 1 Unit side return 14 (356) (470) air Opening AIR FLOW Overall FURNACE (Maximum) FRONT SIDE RETURN 5 6 (152) AIR OPENINGS (102) (Either Side) 3/4 20−1/2 (521) OPTIONAL RAB (19) 17−1/2 (446) RAB−B−6 (76M88) RETURN AIR BASE 7/8 21 (533) RAB−C−6
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OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) CONCENTRIC WALL CONCENTRIC ROOF TERMINATION APPLICATIONS TERMINATION APPLICATIONS FLASHING 10-1/2 (Not Furnished) (267) 12 (305) OUTSIDE Minimum WALL INTAKE Above Average AIR Snow EXHAUST EXHAUST Accumulation AIR AIR SHEET METAL STRAP (Clamp and sheet metal strap 12 (305) INTAKE INTAKE CLAMP must be field installed to support Minimum AIR AIR (Not Furnished) Above the weight of the termination kit.) Grade CLAMP GRADE ÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉ 71M80 1−1/2 inch
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OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) DIRECT VENT APPLICATIONS WALL TERMINATION KITS (CLOSE-COUPLE) − 22G44 − 2 inch (51 mm) or 44J40 − 3 inch (76 mm) See Installation Instructions for specific usage. If Intake and Exhaust Pipe is less than 12 in. (305 mm) above snow accumula- tion or other obstructions, field fabri- cated piping must be installed. EXHAUST 12 AIR (305) INSULATION INTAKE (Not Furnished) AIR INTAKE EXHAUST AIR AIR 5 (127) 2 12 (305) Minimum (51) 5-1/2 ABOVE GRADE 12 12 (14
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BLOWER/WATTS DATA G43UF−24B−045 PERFORMANCE (Less Filter) Air Volume / Watts at Different Blower Speeds External External S St tatic atic Pressure High Medium−High Medium−Low Low in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts 0.00 0 1125 530 425 900 425 360 745 350 295 690 325 265 0.10 25 1115 525 410 905 425 350 760 360 285 695 330 260 0.20 50 1090 515 395 895 420 335 755 355 280 685 325 255 0.30 75 1060 500 380 880 415 325 740 350 270 675 320 250 0.40 100 1020 480 365 860
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BLOWER/WATTS DATA G43UF−48C−090 PERFORMANCE (Less Filter) Air Volume / Watts at Different Blower Speeds External External S St tatic atic Pressure High Medium−High Medium−Low Low in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts 0.00 0 2180 1030 930 1835 865 790 1520 715 630 1280 605 510 0.10 25 2135 1005 885 1825 860 750 1510 710 610 1275 600 495 0.20 50 2085 985 840 1810 855 720 1505 710 580 1270 600 475 0.30 75 2030 955 800 1775 835 685 1500 705 565 1265 595 460 0.40 100 194
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BLOWER/WATTS DATA G43UF−60D−135 PERFORMANCE (Less Filter) − Single Side Return Air − Air volumes in bold require field fabricated transi- tion to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter in order to maintain proper air velocity. External Static Air Volume / Watts at Different Blower Speeds Pressure High Medium−High Medium−Low Low in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts 0.00 0 2665 1260 1440 2325 1095 1100 1865 880 890 1410 665 690 0.10 25 2615 1235
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Visit us at www.lennox.com For the latest technical information, www.lennoxdavenet.com Contact us at 1−800−4−LENNOX NOTE − Due to Lennox’ ongoing committment 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. ©2005 Lennox Indust
