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Lennox Hearth G43UF manual

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Table of contents for the manual

  • Page 1

    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 T ons MODEL NUMBER IDENTIFICA TION G 43 24 −B − 045 Unit T ype G = Gas Furnace Series 43 = 90% Minimum AFUE Nominal[...]

  • Page 2

    G43UF / Page 2 FEA TURES CONTENTS Blower Data Pages 13−15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dimensions Pages 9−12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust Pipe V enting Information Page 7 . . . . . . . . . . . . . . . . . . . Features and Options Pages 2−4 . . . . . . . . . . . [...]

  • Page 3

    G43UF / Page 3 FEA TURES HEA TING SYSTEM Lennox Duralok Plus ® Heat Exchanger Assembly Lennox developed heat exchanger assembly consists of primary heat exchanger and secondary condenser coil assembly . Main 3-pass clamshell type heat exchanger constructed of heavy−gauge, aluminized steel. Designed for normal expansion and contraction. Crimped s[...]

  • Page 4

    G43UF / Page 4 FEA TURES FIL TER (NOT FURNISHED) Filter and provisions for external mounting must be field provided. OPTIONS Air Filter and Rack Kit for Side Return Air Applications (Not for use with RAB Return Air Base) W ashable or vacuum cleanable polyurethane frame type filter and external side return air rack available for field installation. [...]

  • Page 5

    G43UF / Page 5 SPECIFICA TIONS Gas Heating Performance ModelNo. G43UF −24B−045 G43UF −24B−070 G43UF −36B−070 G43UF −36C−090 G43UF −36C−090H 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 (1 1.8) 61,000 (17.9) 62,000 (18.2) 82,000 (24.0) 81,[...]

  • Page 6

    G43UF / Page 6 OPTIONAL ACCESSORIES − MUST BE ORDERED EXTR A B" Width Models C" Wid th Models D" Width Models FIL TER KITS 1 Air Filter and Rack Kit Horizontal (end) Size of filter − in. (mm) 87L96 − 18 x 25 x 1 (457 x 635 x 25) 87L97 − 20 x 25 x 1 (508 x 635 x 25) 87L98 − 25 x 25 x 1 (635 x 635 x 25) Side Return S[...]

  • Page 7

    G43UF / Page 7 EXHAUS T PIPE VENTING T ABLE 1 Maximum Equivalent V ent Length − One or T wo Pipe Applications Altitude V ent Size (diameter) G43UF−24B−045 G43UF−24B−070 G43UF−36B−070 G43UF−36C−090 G43UF−48C−090 2 G43UF−48C−1 10 2 G43UF−60C−1 10 3 G43UF−60D−135 () ft. mf t .mf t .mf t .mf t . m 0 − 2000 ft. (0 609[...]

  • Page 8

    G43UF / Page 8 FIL TER AIR RESIS T ANCE For 1 Inch (25 mm) Cleanable Filter (Field Provided) cfm L/s in. w .g. Pa 0 0 0.00 0 200 95 0.01 0 400 190 0.03 5 600 285 0.04 10 800 380 0.06 15 1000 470 0.09 20 1200 565 0.12 30 1400 660 0.15 35 1600 755 0.19 45 1800 850 0.23 55 2000 945 0.27 65 2200 1040 0.33 80 2400 1 130 0.38 95 2600 1225 0.44 11 0 HIGH [...]

  • Page 9

    G43UF / Page 9 DIMENSIONS − INCHES (MM) 1 Bottom Return Air Opening 1 Bottom Return Air Opening ELECTRICAL INLET (Either Side) SUPPL Y AIR OPENING AIR FLOW FRONT VIEW SIDE VIEW TOP VIEW A B 9/16 (14) C 3/4 (19) 3/4 (19) 28−1/2 (724) 19−7/16 (494) 23−1/2 (597) 4−1/4 (108) 1 1−5/8 (295) Right 9−3/4 (248) Left 4−7/8 (124) Right 2−1/4[...]

  • Page 10

    40 (1016) A UP−FLOW POSITION B G43UF / Page 10 OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) 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 1 1 in. (584 x 279 mm). The ope[...]

  • Page 11

    G43UF / Page 1 1 OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) 37 (940) 3 (76) 71M80  1−1/2 inch (38 mm) 69M29  2 inch (51 mm) See Inst allation Instructions for specific usage. CONCENTRIC W ALL TERMINA TION APPLICA TIONS CLAMP (Furnished) 2 x 1-1/2 in. (51 x 38 mm) 60G77 3 x 2 in. (76 x 51 mm) 33K97 REDUCER BUSHING (Furnished) ELBOW (Furni[...]

  • Page 12

    G43UF / Page 12 OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM) 5 (127) 5-1/2 (140) 12 (305) Minimum ABOVE GRADE INT AKE AIR EXHAUST AIR GRADE EXHAUST AIR INT AKE AIR INSULA TION (Not Furnished) 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. GRADE 1[...]

  • Page 13

    G43UF / Page 13 BLOWER/W A TTS DA T A G43UF−24B−045 PERFORMANCE (Less Filter) External St atic Air V olume / Watt s at Different Blower Speeds External St atic Pressure High Medium−High Medium−Low Low in. w .g. Pa cfm L/s W atts cfm L/s Watt s cfm L/s W atts cfm L/s Watt s 0.00 0 1 125 530 425 900 425 360 745 350 295 690 325 265 0.10 25 1 1[...]

  • Page 14

    G43UF / Page 14 BLOWER/W A TTS DA T A G43UF−48C−090 PERFORMANCE (Less Filter) External St atic Air V olume / Watt s at Different Blower Speeds External St atic Pressure High Medium−High Medium−Low Low in. w .g. Pa cfm L/s W atts cfm L/s Watt s cfm L/s W atts cfm L/s Watt s 0.00 0 2180 1030 930 1835 865 790 1520 715 630 1280 605 510 0.10 25 [...]

  • Page 15

    G43UF / Page 15 BLOWER/W A TTS DA T A 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 St atic Air V olume / Watt s at Different Blower Speeds Pressure [...]

  • Page 16

    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 , S pecifications, Ratings and Dimensions subject to change without notice a nd without incurring liability . Improper installation, adjustment, alteration, service or m[...]