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Lennox ML193UH Instruction Manual

Merit series upflow / horizontal gas furnaces
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Download this manual See also: User's Information Manual, Instruction and Installation Manual
E N G I N E E R I N G D A T A
MODEL NUMBER IDENTIFICATION
ML = Merit
1
ML 1 93 UH 070 P 36 B
Unit Type
Series
®
Stages
1 = One-Stage
AFUE
93 = 93%
Configuration
UH = Upflow/Horizontal
Nominal Gas Heat Input
045 = 44,000 Btuh
070 = 66,000 Btuh
090 = 88,000 Btuh
110 = 110,000 Btuh
135 = 132,000 Btuh
Indoor coils with the same letter designation will physically match the furnace.
G A S F U R N A C E S
Input - 44,000 to 132,000 Btuh
Nominal Add-on Cooling - 2 to 5 Tons
Cabinet Width
1
B = 17-1/2 in.
C = 21 in.
D = 24-1/2 in.
Nominal Add-On Cooling Capacity
24 = 2 tons
36 = 3 tons
48 = 4 tons
60 = 5 tons
Blower
P = PSC Multi-Speed Blower Motor
ML193UH
MERIT
SERIES
®
Upflow / Horizontal
Bulletin No. 210588
October 2010
Supersedes September 2010
AFUE - 93%

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Summary of Contents for Lennox ML193UH

  • Page 1 G A S F U R N A C E S ML193UH MERIT SERIES ® Upflow / Horizontal E N G I N E E R I N G D A T A Bulletin No. 210588 October 2010 Supersedes September 2010...
  • Page 2 FTC labeling regulations. Lennox developed heat exchanger assembly consists of primary heat exchanger ISO 9001 Registered Manufacturing Quality System. and secondary condenser Blower data from unit tests conducted in Lennox coil assembly. Laboratory air test chamber. Main multi-pass crimped APPLICATIONS...
  • Page 3 OPTIONS installation. High Altitude Orifice Kit − natural gas models only Lennox Designed Flue Condensate Trap Assembly Required on all natural gas units for proper unit Condensate trap assembly is mounted outside the operation at altitudes from 7,501 to 10,000 ft.
  • Page 4 Roof Termination Flashing Kit See Thermostat bulletins in Controls Section and Lennox Price Book for selection. 2 or 3 inch kit contains two neoprene rubber roof flashings for vertical venting through a roof. Night Service Kit Vent pipe and insulation not furnished.
  • Page 5 Available in single and ten pack kits. Available in 6, 24 or 50 ft. lengths. Rack has filter door for easy filter servicing. Flanges on rack allow easy duct connection. Field installs on either side of unit cabinet. See dimension drawing. ML193UH / Page 5...

  • Page 6: Specifications

    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. ML193UH / Page 6...
  • Page 7 ANSI−Z223.1) or applicable provisions of local building codes. In Canada flue sizing must conform to the methods outlined in National Standard of Canada CAN/CSA−B149.1. Allow proper clearances to accommodate condensate trap and vent pipe installation. Do not install the furnace directly on carpeting, tile, or other combustible materials other than wood flooring. ML193UH / Page 7...
  • Page 8 Pressure Switch Kit LPG/Propane Kit to Natural Gas Kit Input Orifice Kit 4501 - 7500 ft. 7501 - 10,000 ft. 0 - 7500 ft. 0 - 7500 ft. 7501- 10,000 ft. all models 74W90 74W91 69W73 73W81 73W37 ML193UH / Page 8...
  • Page 9 STANDARD TERMINATION AT ELEVATION 0 - 10,000 ft. Pipe Size 2 in. 2-1/2 in. 3 in. Input No. of 90 ELL CONCENTRIC TERMINATION ELEVATION 0 - 10,000 ft. Pipe Size 2 in. 2-1/2 in. 3 in. Input No. of 90 ELL ML193UH / Page 9...
  • Page 10 (83) (19) (19) (597) Bottom Return Bottom Return Air Opening Air Opening FRONT VIEW SIDE VIEW Model No. ML193UH045P24B ML193UH045P36B 17-1/2 16-3/8 7-5/8 ML193UH070P24B ML193UH070P36B ML193UH090P36C ML193UH090P48C 19-7/8 19-1/2 9-3/8 ML193UH110P48C ML193UH110P60C ML193UH135P60D 24-1/2 23-3/8 11-1/8 ML193UH / Page 10...
  • Page 11 2-7/8 OPENING OPENING (73) 9/16 COMBUSTION END VIEW FRONT VIEW END VIEW (14) (19) AIR INTAKE Model No. ML193UH045P24B ML193UH045P36B 17-1/2 16-3/8 7-5/8 ML193UH070P24B ML193UH070P36B ML193UH090P36C ML193UH090P48C 19-7/8 19-1/2 9-3/8 ML193UH110P48C ML193UH110P60C ML193UH135P60D 24-1/2 23-3/8 11-1/8 ML193UH / Page 11...
  • Page 12 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. To minimize pressure drop, the largest opening height possible, up to 14 in. (356 mm), is preferred. ML193UH / Page 12...
  • Page 13 31-1/2 800 64-1/2 1638 30-5/8 778 63-5/8 1616 CX34-62D-6F C33-62D 29-1/2 749 62-1/2 1588 28-3/4 730 61-3/4 1568 (838) HORIZONTAL POSITION Model Number CH33-36B-2F CH33-42B-2F 26-1/2 59-1/2 1511 CH33-36C-2F CH33-48C-2F CH33-60D-2F CH33-44/48B-2F CH33-62D-2F 31-1/2 64-1/2 1638 CH33-50/60C-2F ML193UH / Page 13...
  • Page 14 3 (76) PVC pipe (recommended) NOTE - PVC pipe and fittings are not furnished When required Use and must be field furnished. Field Provided 2-1/2 to 2 in. (64 to 51 mm) Coupling 2-1/2 (64) PVC pipe ML193UH / Page 14...
  • Page 15 NOTE − 12 in. (305 mm) minimum height above NOTE − 12 in. (305 mm) minimum height above average snow accumulation average snow accumulation (from bottom of vent pipe). (from bottom of vent pipe). ML193UH / Page 15...
  • Page 16 12 (305) Minimum 6 (152) MIN. Above Grade or Average 5-1/2 Above Grade or Average Snow Accumulation Snow Accumulation (140) GRADE GRADE 12 (305) MAX. for 2 (51) Dia. Exhaust 20 (508) MAX. for 3 (76) Dia. Exhaust ML193UH / Page 16...
  • Page 17 1440 600 1300 500 1110 420 1000 350 0.40 1405 570 1255 470 1075 400 0.50 1340 535 1200 445 1045 380 0.60 1255 500 1125 420 0.70 1165 475 1080 395 0.80 1060 455 0.90 ML193UH / Page 17...

  • Page 18: Blower Data

    1950 1720 1445 0.70 2225 1370 1965 1690 1450 2175 1335 1895 1665 1430 0.80 2150 1335 1875 1655 1435 2075 1295 1840 1605 1400 0.90 2025 1290 1830 1575 1375 1975 1255 1755 1540 1340 ML193UH / Page 18...
  • Page 19 ML193UH / Page 19...
  • Page 20 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.

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