Lennox ML180UHE Manual
Merit ml180uhe series upflow / horizontal - high efficiency blower motor gas furnace
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- Installation instructions manual (44 pages) ,
- Manual (33 pages) ,
- User's information manual (7 pages)
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E N G I N E E R I N G D A T A
MODEL NUMBER IDENTIFICATION
ML = Merit Series
1
ML 1 80 UH 070 X E 36 B
Unit Type
®
Stages
1 = Single-Stage
AFUE
80 = 80%
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.
Upflow / Horizontal - High Efficiency Blower Motor
Input - 44,000 to 132,000 Btuh
Nominal Add-on Cooling - 1.5 to 5 Tons
Blower
E = High Efficiency Constant Torque Blower Motor
Low NO
Nitrogen Oxides standards
G A S F U R N A C E S
ML180UHE
MERIT
Bulletin No. 210613
AFUE - 80%
Cabinet Width
1
A = 14-1/2 in.
B = 17-1/2 in.
C = 21 in.
D = 24-1/2 in.
Nominal Add-On Cooling Capacity
36 = 1.5-3 tons
48 = 2.5-4 tons
60 = 3-5 tons
= Units meet California
x
SERIES
®
June 2011
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Table of Contents
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Summary of Contents for Lennox ML180UHE
- Page 1 G A S F U R N A C E S ML180UHE MERIT SERIES ® Upflow / Horizontal - High Efficiency Blower Motor E N G I N E E R I N G D A T A Bulletin No. 210613...
- Page 2 Standards. applications. ISO 9001 Registered Manufacturing Quality System. Each unit factory test operated to ensure proper Blower data from unit tests conducted in Lennox operation. Laboratory air test chamber. ML180UHE / Page 2...
- Page 3 FEATURES Flame Rollout Switches (2) HEATING SYSTEM Lennox Duralok™ Heat Exchanger Assembly Manual reset switches are factory installed on burner box. Heavy gauge aluminized steel heat exchanger. Switches provides protection from abnormal operating Crimped seam clamshell type design. conditions. Designed for normal expansion and contraction.
- Page 4 Combustion air inducer is operated by the integrated See Thermostat bulletins in Controls Section and furnace control. Prior to ignition, a pre-purge cycle Lennox Price Book for selection. for 15 seconds is initiated. After the main burners are FILTER (NOT FURNISHED) turned off, a post-purge cycle for 5 seconds is run.
- Page 5 Engaging holes furnished on cabinet for alignment. C33 uncased coils match furnaces without any overhang but require an optional adaptor base or field fabricated transition to match furnace opening. See C33 coil bulletin for additional information. ML180UHE / Page 5...
- Page 6 Reprinted with permission from NFPA 54: National Fuel Gas Code 1999, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National Fire Protection Association on the referenced subject, which is represented only by the standard in its entirety. ML180UHE / Page 6...
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Page 7: Specifications
Left side requires 4 in. if single wall vent is used on 14-1/2 in. cabinets, 2 in. on Line contact installation permissible between jacket top or sides and building 17-1/2 in. cabinets. joists. ML180UHE / Page 7... -
Page 8: High Altitude Derate
2001 - 4500 Feet 4501 - 7500 Feet 7501 - 10,000 ft. Minimum Input Maximum Natural LPG/ Natural LPG/ Natural LPG/ Natural LPG/ Natural LPG/ Propane Propane Propane Propane Propane Natural Gas High Altitude Orifice Kit required. ML180UHE / Page 8... - Page 9 3-1/4 (83) (597) (19) (19) Bottom Return Bottom Return Air Opening Air Opening FRONT VIEW SIDE VIEW Model No. ML180UH045E36A 14-1/2 13-3/8 4-3/4 ML180UH070E36B 17-1/2 16-3/8 6-1/4 ML180UH090E48B ML180UH090E60C 19-7/8 19-1/2 ML180UH110E60C ML180UH135E60D 24-1/2 23-3/8 9-3/4 ML180UHE / Page 9...
- Page 10 (108) 9/16 (14) RETURN FLOW SUPPLY OPENING OPENING 9/16 (19) (14) END VIEW FRONT VIEW END VIEW Model No. ML180UH045E36A 14-1/2 13-3/8 4-3/4 ML180UH070E36B 17-1/2 16-3/8 6-1/4 ML180UH090E48B ML180UH090E60C 19-7/8 19-1/2 ML180UH110E60C ML180UH135E60D 24-1/2 23-3/8 9-3/4 ML180UHE / Page 10...
- Page 11 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. ML180UHE / Page 11...
- Page 12 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 CH33-18A-2F 21-1/2 54-1/2 1384 CH33-24/30A-2F CH33-42B-2F 26-1/2 59-1/2 1511 CH33-36A-2F CH33-48C-2F CH33-36B-2F CH33-60D-2F CH33-36C-2F CH33-44/48B-2F CH33-62D-2F 31-1/2 64-1/2 1638 CH33-50/60C-2F ML180UHE / Page 12...
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Page 13: Blower Data
1730 1505 1380 1310 1110 0.30 1690 1460 1345 1275 1065 0.40 1645 1435 1310 1240 1010 0.50 1615 1395 1265 1180 0.60 1590 1350 1210 1150 0.70 1545 1300 1175 1095 0.80 1270 1140 1040 ML180UHE / Page 13... - Page 14 2160 895 1955 735 1755 570 1500 440 1265 340 2095 865 1950 710 1700 545 1485 420 1260 325 0.80 2105 905 1925 750 1715 580 1435 450 1215 345 2065 880 1890 725 1680 565 1415 445 1205 345 ML180UHE / Page 14...
- Page 16 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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