Manual Lennox Hearth G43UF

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  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 . . . . . . . . . . . ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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. ...

  • Lennox Hearth G43UF - 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, ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

  • Lennox Hearth G43UF - 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 ...

Manufacturer Lennox Hearth Category Furnace

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All of them are important, but the most important information from the point of view of use of the device are in the user manual Lennox Hearth G43UF.

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Lennox Hearth G43UF by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Lennox Hearth G43UF.

A complete Lennox Hearth manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

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