PRODUCT SPECIFICTIONS GS FURNCES ML80UHE MERIT SERIES Upflow / Horizontal - High Efficiency lower Motor ulletin No. 20825 July 208 Supersedes February 208 FUE - 80% Input - 44,000 to 32,000 tuh Nominal dd-on Cooling -.5 to 5 Tons MODEL NUMER IDENTIFICTION ML 80 UH 070 X E 36 Unit Type ML =Merit Series Stages = Single-Stage FUE 80 = 80% Configuration UH = Upflow/Horizontal Nominal Gas Heat Input 045 = 44,000 tuh 070 = 66,000 tuh 090 = 88,000 tuh 0 = 0,000 tuh 35 = 32,000 tuh Cabinet Width = 4-/2 in. = 7-/2 in. C = 2 in. D = 24-/2 in. Nominal dd-on Cooling Capacity 36 =.5-3 tons 48 = 2.5-4 tons 60 = 3-5 tons lower E = High Efficiency Constant Torque lower Motor Low NO x X = Units meet California Nitrogen Oxides Standard (40ng/J) Indoor coils with the same letter designation will physically match the furnace.
FETURES J CONTENTS lower Data... 3 Dimensions - Furnace/Coil Combined Dimensions... 2 Dimensions - Horizontal Position... 0 F Dimensions - Upflow Position... 9 Features... 2 Gas Heat ccessories... 8 High ltitude Derate... 8 Installation Clearances... 7 Model Number Identification... Optional ccessories - Order Separately... 8 Optional ccessory Dimensions... G D L E C K I Specifications... 7 H NOTE - ML80UHE FURNCES RE NOT VILLE IN CND! WRRNTY Duralok luminized Steel Heat Exchanger - Limited twenty year warranty in residential applications, ten years in non-residential applications. ll other covered components - Limited five year warranty in residential applications, one year in nonresidential applications. Refer to Lennox Equipment Limited Warranty certificate included with equipment for details. PPROVLS Units are Certified by HRI. Units tested and rated according to US DOE test procedures and FTC labeling regulations. pproved by the California Energy Commission and meets California Nitrogen Oxides Standard (NOx) limits of 40 ng/j. ISO 900 Registered Manufacturing Quality System. lower data from unit tests conducted in Lennox Laboratory air test chamber. ML80UHE / Page 2 PPLICTIONS Input capacities of 44,000, 66,000, 88,000, 0,000 and 32,000 tuh. Energy efficiency (FUE) of 80%. Compact cabinet for upflow, horizontal-left or horizontalright applications. Utility room, alcove, closet, crawl space, basement or attic installation. Lennox add-on indoor coils, high-efficiency air cleaners and humidifiers can easily be added to furnace. Shipped factory assembled with all controls installed and wired. Ready for installation in upflow or horizontal right-hand position without any modifications. Horizontal left-hand position requires repositioning of pressure switch. Removable bottom seal panel shipped in place for side return air is easily removed for bottom/end return air applications. Each unit factory test operated to ensure proper operation.
FETURES C D E F G HETING SYSTEM Lennox Duralok Heat Exchanger ssembly Heavy gauge aluminized steel heat exchanger. Crimped seam clamshell type design. Designed for normal expansion and contraction. Minimum resistance to air flow. Heat exchanger has been laboratory life cycle tested in excess of industry standards. Compact size of heat exchanger permits low overall design of furnace cabinet. Inshot urners luminized steel inshot burners provide efficient, trouble-free operation. urner venturi mixes air and gas in correct proportion for proper combustion. urner assembly is removable from the unit as a single component for ease of service. SureLight Hot Surface Ignitor Tough, reliable, long-life, trouble-free performance. Silicon nitride ignitor. Cemented to steatite block for protection against current leakage. Ignition leads are constructed of nickel plated copper and are enclosed in high temperature Teflon insulation for dependable operation. Gas Control Valve 24 volt redundant combination gas control valve combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control. Combustion ir Inducer Shaded pole heavy duty blower prepurges heat exchanger and safely vents flue products. Pressure switch proves blower operation before allowing gas valve to open. Operates only during heating cycle. Direct access allows inducer assembly to be rotated 90 clockwise or counterclockwise to facilitate easy vent attachment from either side of the cabinet in upflow applications and from the top in horizontal applications. Flame Rollout Switches (2) Manual reset switches are factory installed on burner box. Switches provides protection from abnormal operating conditions. H Limit Control utomatic reset, primary limit is accurately located on vestibule panel on all units. Optional ccessories High ltitude Pressure Switch Kit Required on most units for proper unit operation at altitudes from 4,50 to 7500 ft. Natural Gas to LPG/Propane Conversion Kit Required for field changeover from natural gas to LPG/ Propane. LPG/Propane to Natural Gas Conversion Kit Required for field changeover from LPG/Propane to natural gas. Vent daptor (Upflow pplications Only) llows venting through a masonry chimney without the need of a flue liner. Manual reset temperature sensor protects against abnormal operating conditions. Sensor wiring may be routed from either side of adaptor. Minimum winter design temperatures: 0 F when used with interior masonry chimneys. +5 F when used with exterior masonry chimneys. Refer to Winter Design Temperatures Map on page 6 for application information. lso refer to the installation instructions for detailed information. LOWER 6 in. (52 mm) 7 in. (78 mm) Power Saver Constant Torque lower Motor Programmable high efficiency multi-speed blower motor. y maintaining constant torque output, blower motor can deliver more uniform (but not constant) airflow over the static pressure range. Programmable multi-speed operation is achieved by the use of an ECM (Electronically Commutated Motor) motor. Leadless blower motor features simple plug-in connections. Motor is controlled by the Integrated Furnace Control. lower speeds are easily changed on the integrated furnace control. See lower Data tables. lower ssembly Lennox designed and built, direct drive blower. Each blower is statically and dynamically balanced as an assembly before installation in the unit. lower motor is resiliently mounted to blower assembly. lower is easily removed for servicing. ML80UHE / Page 3
FETURES I CONTROLS SureLight Integrated Furnace Control Control contains all necessary controls and relays to operate furnace. Combustion air inducer is operated by the integrated furnace control. Prior to ignition, a pre-purge cycle for 5 seconds is initiated. fter the main burners are turned off, a post-purge cycle for 5 seconds is run. Flame sensor assures safe and reliable operation. Should loss of flame occur the integrated furnace control will initiate 4 re-attempts at ignition before locking out unit operation for 60 minutes. Watchguard type circuit automatically resets ignition controls after one hour of continuous thermostat demand after unit lockout, eliminating nuisance calls for service. Fan control consists of adjustable blower timed-off delay (60, 90, 20, 80 seconds - factory setting 90 seconds) and fixed blower timed-on delay (30 seconds - heating, 2 seconds - cooling). For air-conditioning applications, blower is automatically energized on thermostat demand for cooling. Control has low speed continuous blower speed setting for humidifier or air cleaner operation. Two accessory terminals furnished for additional power supply requirements for 20 volt (less than amp) power humidifiers and powered air cleaners. One additional terminal is furnished for power supply requirements for 24V (less than 0.5 amp) low voltage accessories. Ignition control has single red LED to indicate status and as an aid in troubleshooting. Last five codes are stored in non-volatile memory (accessible by recall button on control) for servicing. 24 Volt Transformer Furnished and factory installed on outside of control box. 40V transformer has fuse wired in series. Field Wiring Make-up ox Furnished for line voltage wiring. Factory installed internally on left side of furnace. ox may be installed on right side of furnace. Optional ccessories lower Relay Kit (For Use With Two-Stage Outdoor Units) llows furnace blower speed changes when matched with two-stage air conditioners or heat pumps. Furnace Twinning Kit Required to operate two furnaces simultaneously. Kit consists of twinning relays, quick connect terminals and mounting hardware. Used for single-stage heating/single-stage cooling with a single-stage thermostat. Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat bulletins in Controls Section and Lennox Price ook for selection. Night Service Kit Contains most commonly used service parts: Furnace Control Ignitor Flame sensor Gas valve Transformer FILTER (Not Furnished) Filter and provisions for external mounting must be field provided. Optional ccessories ir Filter and Rack Kit for Horizontal Return ir (End) pplications Washable or vacuum cleanable polyurethane frame type filter and external end return air rack available for field installation. Rack has filter door for easy filter servicing. Flanges on rack allow easy duct connection. See dimension drawing. ir Filter and Rack Kit for Upflow Side Return ir pplications - Not for use with Return ir ase Washable or vacuum cleanable polyurethane frame type filter and external side return air rack available for field installation. vailable in single and ten pack kits. 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. ML80UHE / Page 4
FETURES J K L CINET Low-profile, narrow width cabinet allows easy installation. Heavy-gauge, cold rolled steel construction. Pre-painted cabinet finish. Flue outlet on top of cabinet for upflow applications, can be relocated to either side of cabinet for horizontal applications. Flanges provided on supply air opening for ease of plenum connection or alignment with indoor coil. Insulated cabinet with foil faced insulation on sides and back of heating compartment. Sealed blower compartment. Inner blower compartment access panel seals blower compartment from air leakage. Complete service access. Safety interlock switch automatically shuts off power to unit when blower compartment access panel is removed. Gas piping and electrical inlets are provided in both sides of cabinet. Low Leakage Cabinet ll models have less than 2% air leakage and meet NSI/SHRE Standard 93-200 Method of Test for Determining the ir Tightness of HVC Equipment. Return ir Entry: For bottom/end return-air entry for upflow/horizontal applications, remove furnished bottom seal panel from cabinet. For side return-air entry (upflow applications only), corners are marked on either side of cabinet for return air cut-outs. See dimension drawings. NOTE - 60C and 60D size units that require air volumes over 800 cfm must have one of the following:. Single side return air and Optional Return ir ase with transition that must accommodate required 20 x 25 x inch air filter to maintain proper velocity. 2. ottom return air. 3. Return air from both sides. 4. ottom and one side return air. See lower Performance Tables for additional information. Coil Match-up ll furnaces exactly match Lennox cased upflow indoor coils and horizontal indoor coils with same letter designation (,, C, D) in model number. No adaptor required. Engaging holes furnished on cabinet for alignment. Lennox uncased coils match furnaces without any overhang but require an optional adaptor base or field fabricated transition to match furnace opening. See coil bulletin for additional information. Optional ccessories Horizontal Suspension Kit Provides suspension of unit and indoor coil in horizontal applications. llows complete service access. Consists of corner mounted hanging brackets with vibration isolators, return air end support rail and hardware for assembly. Metal hanging straps must be field provided. Return ir ase field fabricated transition or Return ir ase is required when using an IQ product higher than 4-3/6 in. installed next to the unit and serviced from the front. IQ products higher than 20 in. require a field fabricated transition. ase must be used for 60C and 60D models with air volumes over 800 cfm in upflow applications when only one side return is required. Cabinet is shipped flat for easy field assembly and is pre-painted steel to match the furnace. See Dimension Drawing. High Performance Economizer(Commercial pplications Only) Designed for applications requiring outdoor air to be utilized in a commercial HVC system. llows the entry of fresh outdoor air for free cooling, reducing the requirement for mechanical cooling. Heavy gauge galvanized steel cabinet lined with thick fiberglass insulation. Mixed air sensor, outdoor air sensor and 24VC transformer furnished. pproved for California Title 24 building standards. SHRE 90.-200 compliant. See separate Product Specifications bulletin for additional information and available control and sensor options. ML80UHE / Page 5
99% WINTER DESIGN TEMPERTURES FOR THE CONTIGUOUS UNITED STTES 5 o F 0 o F 7 o F 27 o F 0 o F 5 o F 37 o F 0 o F 7 o F 27 o F 37 o F This map is a necessarily generalized guide to temperatures in the contiguous Unites States. Temperatures shown for areas such as mountainous regions and large urban centers may not be accurate. The data used to develop this map was taken from the 993 SHRE Fundamentals Handbook (Chapter 24, Table : Climate Conditions for the United States). Reprinted with permission from NFP 54: National Fuel Gas Code 999, National Fire Protection ssociation, Quincy, M 02269. This reprinted material is not the complete and official position of the National Fire Protection ssociation on the referenced subject, which is represented only by the standard in its entirety. ML80UHE / Page 6
SPECIFICTIONS Gas Model No. ML80UH045E36 ML80UH070E36 ML80UH090E48 Heating Model No. - Low Nox ML80UH045XE36 ML80UH070XE36 ML80UH090XE48 Performance HRI Ref. No. non X models 058928 058930 058932 X models 058929 05893 058934 FUE 80% 80% 80% Input - tuh 44,000 66,000 88,000 Output - tuh 36,000 53,000 72,000 Temperature rise range - F 5-45 40-70 35-65 Gas Manifold Pressure (in. w.g.) 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 Nat. Gas / LPG/Propane High Static - in. w.g. 0.50 0.50 0.50 Connections Flue connection - in. round 4 4 4 in. Gas pipe size IPS /2 /2 /2 Indoor lower Electrical Data Wheel nom. dia. x width - in. 0 x 8 0 x 0 0 x 0 Motor Type DC rushless DC rushless DC rushless Motor output - hp /2 /2 3/4 Tons of add-on cooling.5-3.5-3 2.5-4 ir Volume Range - cfm 350-380 395-45 750-785 Voltage 20 volts - 60 hertz - phase lower motor full load amps 6.8 6.8 8.4 Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 27 42 SPECIFICTIONS Gas Model No. ML80UH090E60C ML80UH0E60C ML80UH35E60D Heating Model No. - Low Nox - - - ML80UH0XE60C - - - Performance HRI Ref. No. non X models 058933 058935 058937 X models - - - 058936 - - - FUE 80% 80% 80% Input - tuh 88,000 0,000 32,000 Output - tuh 72,000 90,000 07,000 Temperature rise range - F 30-60 35-65 30-60 Gas Manifold Pressure (in. w.g.) 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 Nat. Gas / LPG/Propane High Static - in. w.g. 0.50 0.50 0.50 Connections Flue connection - in. round 4 4 4 in. Gas pipe size IPS /2 /2 /2 Indoor lower Electrical Data Wheel nom. dia. x width - in. -/2 x 0 -/2 x 0 x Motor Type DC rushless DC rushless DC rushless Motor output - hp Tons of add-on cooling 3-5 3-5 3.5-5 ir Volume Range - cfm 990-2290 920-235 40-2495 Voltage 20 volts - 60 hertz - phase lower motor full load amps 0.9 0.9 0.9 Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 52 60 78 NOTE - Filters and provisions for mounting are not furnished and must be field provided. nnual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. INSTLLTION CLERNCES - INCHES (MM) UPFLOW POSITION Vent Type Type Type C Sides 0 (0) 0 (0) Rear 0 (0) 0 (0) Top (25) (25) Front 2-/4 (57) 2-/4 (57) Front (service/alcove) 24 (60) 24 (60) Floor Combustible Combustible Flue (25) 6 (52) NOTE ir for combustion must conform to the methods outlined in the National Fuel Gas Code (NFP 54/NSI-Z223.). NOTE In the U.S. flue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFP 54/NSI-Z223.) or applicable provisions of local building codes. Left side requires 4 in. if single wall vent is used on 4-/2 in. cabinets, 2 in. on 7-/2 in. cabinets. HORIZONTL POSITION Vent Type Type Type C End 2 2 Rear 0 (0) 0 (0) Top 0 (0) 0 (0) Front 2-/4 (57) 2-/4 (57) Front (service) 24 (60) 24 (60) Floor Combustible Combustible Flue (25) 6 (52) NOTE ir for combustion must conform to the methods outlined in the National Fuel Gas Code (NFP 54/NSI-Z223.). NOTE In the U.S. flue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFP 54/NSI-Z223.) or applicable provisions of local building codes. Line contact installation permissible between jacket top or sides and building joists. ML80UHE / Page 7
OPTIONL CCESSORIES - ORDER SEPRTELY Width Models Width Models C Width Models D Width Models CINET CCESSORIES Horizontal Suspension Kit - Horizontal only 5W0 5W0 5W0 5W0 Return ir ase - Upflow only 65W75 50W98 50W99 5W00 High Performance Economizer (Commercial Only) 0U53 0U53 0U53 0U53 CONTROLS lower Relay Kit (for two-stage outdoor units) 85W66 85W66 85W66 85W66 Furnace Twinning Kit 6W72 6W72 6W72 6W72 FILTERS ir Filter and Rack Kit Horizontal (end) 87L95 87L96 87L97 87L98 Size of filter - in. 4 x 25 x 8 x 25 x 20 x 25 x 25 x 25 x Side Return Single 44J22 44J22 44J22 44J22 Ten Pack 66K63 66K63 66K63 66K63 Size of filter - in. 6 x 25 x 6 x 25 x 6 x 25 x 6 x 25 x NIGHT SERVICE KIT Night Service Kit 84W47 84W47 84W47 84W47 VENTING Vent daptor 6 in. conn. size upflow applications only 8M79 8M79 8M79 8M79 Cleanable polyurethane, frame-type filter. GS HET CCESSORIES Input High ltitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas Kit Natural Gas High ltitude Orifice Kit 0-4500 ft. 450-7500 ft. 750-0,000 ft. 0-7500 ft. 750-0,000 ft. 0-7500 ft. 750-0,000 ft. 045 No Change 80W52 80W5 K49 K44 73W8 73W37 070 No Change 80W52 80W5 K49 K44 73W8 73W37 090 No Change 80W52 80W5 K49 K44 73W8 73W37 0 No Change 80W52 80W52 K49 K44 73W8 73W37 35 No Change 80W52 80W5 K49 K44 73W8 73W37 HIGH LTITUDE DERTE NOTE - Units may be installed at altitudes up to 2000 ft. above sea level without any modifications. t altitudes above 2000 ft. units must be derated to match information in the shaded areas shown below. NOTE - This is the only permissible derate for these units. Gas Manifold Pressure (Outlet) in. w.g. Line Pressure - in. w.g. Input 0-2000 Feet 200-4500 Feet 450-7500 Feet 750-0,000 ft. Minimum Natural Gas LPG/ Propane Natural Gas LPG/ Propane Natural Gas LPG/ Propane Natural Gas LPG/ Propane Natural Gas LPG/ Propane Maximum 045 3.5 0 3.2 0 3 0 3.5 0 4.5 3 070 3.5 0 3.2 0 2.8 0 3.5 0 4.5 3 090 3.5 0 3.2 0 2.7 9.6 3.5 0 4.5 3 0 3.5 0 3.5 0 3 9.6 3.5 0 4.5 3 35 3.5 0 3.5 0 2.9 9.6 3.5 0 4.5 3 Natural Gas High ltitude Orifice Kit required. ML80UHE / Page 8
DIMENSIONS - INCHES (MM) - UPFLOW POSITION NOTE - 60C and 60D size units that require air volumes over 800 cfm must have one of the following:. Single side return air and Optional Return ir ase with transition that must accommodate required 20 x 25 x inch (508 x 635 x 25 mm) air filter to maintain proper velocity. 2. ottom return air. 3. Return air from both sides. 4. ottom and one side return air. See lower Performance Tables for additional information. D FLUE OUTLET (Top) 3-/8 (79) SUPPLY IR OPENING 2 Flue outlet may be horizontal but furnace must be vented vertically 3 Optional External Side Return ir Filter Kit is not for use with the optional Return ir ase. 3 OPTIONL EXTERNL SIDE RETURN IR FILTER KIT (Either Side) 23-3/4 (603) 25 (635) TOP VIEW 9/6 (4) 3/4(9) Front Panel 3 (76) Right 6-3/4 (7) Left 3-/4 (83) 27-3/4 (705) 9-7/6 (494) 9/6 (4) 3 OPTIONL EXTERNL SIDE RETURN IR FILTER KIT (Either Side) 33 (838) 9-/8 (232) Right 8-5/8 (29) Left 5-3/8 (37) Right 2-3/6 (56) Left 2 FLUE OUTLET (Either Side) ELECTRICL INLET (Either Side) GS PIPING INLET (Either Side) 4-3/4 (375) 6 (406) ELECTRICL INLET (Either Side) 23 (584) Side Return ir Opening (Either Side) 4 (356) -/2 (38) -5/6 (49) 3/4 (9) C ottom Return ir Opening 3/4 (9) 5/8 (6) 3-/4 (83) 23-/2 (597) ottom Return ir Opening FRONT VIEW SIDE VIEW Model No. C D in. mm in. mm in. mm in. mm ML80UH045E36 4-/2 368 3-3/8 340 3 330 4-3/4 2 ML80UH070E36 ML80UH090E48 ML80UH090E60C ML80UH0E60C 7-/2 446 6-3/8 46 6 406 6-/4 59 2 533 9-7/8 504 9-/2 495 8 203 ML80UH35E60D 24-/2 622 23-3/8 594 23 584 9-3/4 248 ML80UHE / Page 9
DIMENSIONS - INCHES (MM) - HORIZONTL POSITION Flue outlet may be from end but furnace must be vented vertically 9-/8 (232) Top 8-5/8 (29) ottom FLUE OUTLET (Top) 3 (76) LEFT-HND IR DISCHRGE GS PIPING INLET (Top or ottom) IR FLOW ELECTRICL INLET (Top or ottom) 3/4 (9) Front Panel 27-3/4 (705) 9/6 (4) FLUE OUTLET (End) 6-3/4 (7) TOP VIEW 33 (838) 5-3/8 (37) Top 2-3/6 (56) ottom 3/4 (9) 27-3/4 (705) 9/6 (4) 9-7/6 (494) SUPPLY IR OPENING D IR FLOW 4-/4 (08) C 23-/2 (597) RETURN IR OPENING END VIEW 3-/8 (79) FRONT VIEW RIGHT-HND IR DISCHRGE END VIEW ELECTRICL INLET (Top or ottom) IR FLOW GS PIPING INLET (Top or ottom) 6-3/4 (7) Flue outlet may be horizontal but furnace must be vented vertically FLUE OUTLET (Top) 3/4 (9) Front Panel 3 (76) 27-3/4 (705) 2-3/6 (56) Top 5-3/8 (37) ottom TOP VIEW 33 (838) 8-5/8 (29) Top 9-/8 (232) ottom FLUE OUTLET (End) 27-3/4 3-/8 (705) (79) 23-/2 (597) RETURN IR OPENING C 4-/4 (08) IR FLOW D 9-7/6 (494) SUPPLY IR OPENING 9/6 (4) END VIEW 3/4 (9) FRONT VIEW END VIEW 9/6 (4) Model No. C D in. mm in. mm in. mm in. mm ML80UH045E36 4-/2 368 3-3/8 340 3 330 4-3/4 2 ML80UH070E36 ML80UH090E48 7-/2 446 6-3/8 46 6 406 6-/4 59 ML80UH090E60C ML80UH0E60C 2 533 9-7/8 504 9-/2 495 8 203 ML80UH35E60D 24-/2 622 23-3/8 594 23 584 9-3/4 248 ML80UHE / Page 0
OPTIONL CCESSORY DIMENSIONS - INCHES (MM) HORIZONTL (END) FILTER KIT 5/8 (6) 24 3/4 (629) -/4 (32) 5/8 (6) RETURN IR OPENING 23 /2 (597) 5/8 (6) IR FLOW Furnace Cabinet Width Catalog Number in. mm in. mm 87L95 4 356 2-3/4 324 87L96 8 457 6-3/4 425 C 87L97 2 533 8-3/4 476 D 87L98 25 635 23-3/4 603 5/8 (6) SIDE VIEW IR FILTER (Furnished) FRONT VIEW Optional Return ir ase (Upflow pplications Only - For use with,, C and D cabinets) FURNCE FRONT IR FLOW INDOOR IR QULITY CINET (PCO, Filter Cabinet, etc.) IF SE IS USED WITHOUT IQ CINET, SINGLE RETURN IR PLENUM MUST COVER OTH UNIT ND RETURN IR SE OPENINGS 3-/4 (83) 7-/4 (84) 23 (584) Overall (Maximum) Unit side return air Opening 5-5/8 (43) Minimum (279) 2 Maximum 4 (356) SIDE RETURN IR OPENINGS (Either Side) 22-7/6 (570) Overall (Maximum) 4-/2 (368) Width (65W75) 7-/2 (446) Width (50W98) 2 (533) C Width (50W99) 24-/2 (622) D Width (5W00) OPTIONL RETURN IR SE 26-7/8 (683) 23 (584) SIDE VIEW 3/4 (9) NOTE- Optional Side Return ir Filter Kits are not for use with Optional Return ir ase. oth the unit return air opening and the base return air opening must be covered by a single plenum or IQ cabinet. Minimum unit side return air opening dimensions for units requiring 800 cfm or more of air (W x H): 23 x in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IQ cabinet while maintaining dimensions shown. 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. 2 To minimize pressure drop, the largest opening height possible, up to 4 in. (356 mm), is preferred. ML80UHE / Page
DIMENSIONS - INCHES (MM) - FURNCE/COIL COMINED DIMENSIONS UPFLOW POSITION Model No C35/C37/CX35/CX38 Cased C35 Uncased C35/CX35 C37 CX38 in. mm in. mm in. mm in. mm C35/CX35-8/24 C35/CX35-8/24 C35/CX35-24 C35/CX35-24 C35/CX35-30 C35/CX35-30 C37-25 C37-25 - - - - - - 6-/2 49 49-/2 257 4-/8 359 47-/8 97 CX38-25 CX38-25 8-/2 470 5-/2 308 6-3/8 46 49-3/8 254 - - - - - - CX38-30 20-/2 52 53-/2 359 - - - - - - - - - - - - C37-3 C37-3 C35/CX35-30/36 C37-36 C35/CX35-30/36 C37-36 C35/CX35-30/36C C37-36C C35/CX35-36 C35/CX35-36 C37-38 C37-38 CX38-3 CX38-3 CX38-36 CX38-36 CX38-36C CX38-38 CX38-38 22-/2 572 55-/2 40 20-3/4 527 53-3/4 365 24-/2 622 57-/2 46 22-/4 565 55-/4 403 24-/2 622 57-/2 46 22-3/8 568 55-3/8 407 - - - C37-42 CX38-42 24-/2 622 57-/2 46 - - - - - - - - - - - - C35/CX35-48 C35/CX35-48C - - - C37-43 C37-43C C37-48 C37-48C CX38-43 CX38-43C CX38-44/48 CX38-44/48C 27-/2 699 60-/2 537 26-/4 667 59-/4 505 24-/2 622 57-/2 46 - - - - - - - - - - - - C35/CX35-49C C37-49C CX38-49C 29-/2 749 62-/2 588 28-/2 724 6-/2 562 C35/CX35-50/60C C37-50/60C CX38-50/60C 27-/2 699 60-/2 537 25-7/8 657 58-7/8 495 - - - C37-60D CX38-60D 25-/2 648 58-/2 486 - - - - - - - - - - - - CX35-60C C37-62C CX38-62C 3-/2 800 64-/2 638 30-5/8 778 63-5/8 66 CX35-60D C37-62D CX38-62D 29-/2 749 62-/2 588 28 7 6 549 33 (838) 33 (838) HORIZONTL POSITION Model No. in. mm in. mm CH33 CH33-8 2-/2 546 54-/2 384 CH33-24/30, CH33-42, 26-/2 673 59-/2 5 CH33-36, CH33-36, CH33-36C, CH33-48C, CH33-60D CH33-44/48, CH33-62D 3-/2 800 64-/2 638 CH33-50/60C, CH35 CH35-8, CH35-24, CH35-24, CH35-30, CH35-30, CH35-42, CH35-48, CH35-36, CH35-36, CH35-36C, CH35-42C, CH35-48C CH35-5C, CH35-60D 26-/2 673 59-/2 5 3-/2 880 64-/2 638 ML80UHE / Page 2
LOWER DT ML80UH045E36 PERFORMNCE (Less Filter) External Static Pressure in. w.g. ir Volume / Watts at Various lower Speeds High Medium-High Medium Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 380 265 55 65 995 20 975 5 945 05 0.0 345 270 20 75 950 20 880 05 865 00 0.20 320 285 080 90 900 25 805 05 700 85 0.30 290 295 055 200 875 35 750 0 640 90 0.40 265 30 00 205 825 45 70 20 595 95 0.50 230 35 990 25 790 55 660 25 535 00 0.60 90 330 945 230 750 65 630 35 500 0 0.70 65 340 95 235 705 70 570 40 435 5 0.80 30 350 880 245 670 80 535 50 380 20 ML80UH070E36 PERFORMNCE (Less Filter) External Static Pressure in. w.g. ir Volume / Watts at Various lower Speeds High Medium-High Medium Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 45 265 330 70 25 35 75 25 075 85 0.0 45 280 295 70 45 45 30 30 955 95 0.20 355 290 225 85 0 50 080 40 885 00 0.30 330 300 90 200 060 60 035 55 825 0 0.40 290 30 55 205 05 75 970 60 770 20 0.50 245 325 5 25 980 80 930 70 695 25 0.60 225 335 045 230 920 90 865 80 625 35 0.70 90 350 000 235 855 205 790 90 540 40 0.80 60 365 925 245 790 205 735 200 445 45 ML80UH090E48 PERFORMNCE (Less Filter) External Static Pressure in. w.g. ir Volume / Watts at Various lower Speeds High Medium-High Medium Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 785 380 570 270 440 220 395 90 90 20 0.0 755 395 535 275 420 230 350 205 40 30 0.20 730 45 505 290 380 245 30 25 0 45 0.30 690 435 460 305 345 260 275 230 065 55 0.40 645 440 435 320 30 270 240 240 00 65 0.50 65 455 395 335 265 285 80 255 955 80 0.60 590 470 350 350 20 290 50 265 95 85 0.70 545 475 300 360 75 305 095 275 860 200 0.80 N/ N/ 270 370 40 30 040 285 820 20 ML80UHE / Page 3
LOWER DT ML80UH090E60C PERFORMNCE (Less Filter) ir Volume / Watts at Different lower Speeds ottom Return ir, Side Return ir from oth Sides or Return ir from ottom and One Side. External Static Pressure in. w.g. Single Side Return ir ir volumes in bold require Optional return ir ase and field fabricated transition to accommodate 20 x 25 x in. air filter in order to maintain proper air velocity. High Med-High Medium Med-Low Low High Med-High Medium Med-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2255 640 940 420 750 30 580 230 485 85 2290 655 980 425 775 30 605 235 495 95 0.0 2200 655 90 440 705 35 535 240 385 90 2250 675 945 445 730 320 555 245 400 90 0.20 250 675 865 450 655 340 490 260 340 205 220 695 885 465 680 340 50 265 350 205 0.30 225 695 835 475 635 355 450 275 285 25 265 75 850 475 645 355 470 275 285 25 0.40 2090 75 800 495 585 370 405 285 235 230 235 720 80 490 595 370 40 290 225 230 0.50 2060 735 760 50 545 385 370 305 200 245 2070 735 765 55 545 390 370 305 80 245 0.60 2020 750 725 525 55 405 320 320 45 255 2030 760 75 530 495 405 325 320 40 255 0.70 980 765 680 540 465 420 265 330 05 270 990 775 685 540 450 425 265 330 095 270 0.80 935 785 635 560 420 435 225 350 055 285 950 795 645 560 45 435 225 345 040 285 ML80UH0E60C PERFORMNCE (Less Filter) ir Volume / Watts at Different lower Speeds ottom Return ir, Side Return ir with Return ir from oth Sides or Return ir from ottom and One Side. External Static Pressure in. w.g. Single Side Return ir ir volumes in bold require Optional return ir ase and field fabricated transition to accommodate 20 x 25 x in. air filter in order to maintain proper air velocity. High Med-High Medium Med-Low Low High Med-High Medium Med-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2230 635 945 430 75 295 555 230 470 85 235 645 990 45 780 300 60 230 50 200 0.0 280 655 905 445 690 305 50 240 340 75 2260 655 945 425 740 35 550 240 400 85 0.20 235 680 865 465 630 330 470 260 280 90 220 680 895 450 680 335 50 255 350 200 0.30 2090 695 830 480 595 345 440 275 235 200 265 700 850 465 650 355 455 275 285 20 0.40 2050 75 785 495 550 360 385 285 75 20 230 75 830 485 585 365 395 285 230 225 0.50 2025 730 740 520 500 375 340 300 30 225 2095 730 770 500 535 385 365 300 75 235 0.60 200 750 70 535 470 390 305 320 080 240 2055 755 725 55 495 400 305 35 35 250 0.70 965 755 670 555 420 40 255 330 05 255 2000 765 675 535 465 40 255 325 080 265 0.80 905 785 635 560 380 425 25 350 975 270 965 785 640 555 400 425 20 345 025 275 ML80UH35E60D PERFORMNCE (Less Filter) ir Volume / Watts at Different lower Speeds ottom Return ir, Side Return ir with Return ir from oth Sides or Return ir from ottom and One Side. External Static Pressure in. w.g. ML80UHE / Page 4 Single Side Return ir ir volumes in bold require Optional return ir ase and field fabricated transition to accommodate 20 x 25 x in. air filter in order to maintain proper air velocity. High Med-High Medium Med-Low Low High Med-High Medium Med-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2495 755 2295 590 2045 435 845 35 650 230 2365 725 2295 575 2005 40 820 300 635 235 0.0 2440 780 2220 620 205 445 820 330 65 245 2350 745 220 595 2000 435 745 320 530 230 0.20 2390 790 275 640 935 470 735 350 550 255 2330 775 275 625 945 455 730 330 490 250 0.30 2360 805 240 655 895 490 720 370 485 275 2245 785 235 645 895 475 655 355 425 265 0.40 2285 835 225 675 850 50 660 380 455 290 225 80 2085 660 840 495 600 375 385 285 0.50 2240 860 2060 690 85 535 60 400 45 30 275 825 2045 680 85 505 590 390 340 290 0.60 2225 865 205 75 785 550 535 420 330 320 225 845 995 700 765 530 525 405 300 30 0.70 260 895 955 735 755 570 500 440 265 340 2095 865 950 70 700 545 485 420 260 325 0.80 205 905 925 750 75 580 435 450 25 345 2065 880 890 725 680 565 45 445 205 345
REVISIONS Sections Controls Specifications Description of Change dded Furnace Twinning Kit. dded HRI reference numbers. Visit us at www.lennox.com For the latest technical information, www.lennoxpros.com Contact us at -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. Installation and service must be performed by a qualified installer and servicing agency. 208 Lennox Industries, Inc.