PRODUCT SPECIFICTIONS GS FURNCES ML93UH MERIT SERIES Upflow / Horizontal Bulletin No. 20588 October 202 Supersedes ugust 202 FUE - 93% Input - 44,000 to 32,000 Btuh Nominal dd-on Cooling - 2 to 5 Tons MODEL NUMBER IDENTIFICTION Unit Type ML = Merit Series Stages = One-Stage FUE 93 = 93% Configuration UH = Upflow/Horizontal Nominal Gas Heat Input 045 = 44,000 Btuh 070 = 66,000 Btuh 090 = 88,000 Btuh 0 = 0,000 Btuh 35 = 32,000 Btuh ML 93 UH 070 x P 36 B Cabinet Width B = 7-/2 in. C = 2 in. D = 24-/2 in. Nominal dd-on Cooling Capacity 24 = 2 tons 36 = 3 tons 48 = 4 tons 60 = 5 tons Blower P = PSC Multi-Speed Blower Motor Low NO x = Units meet California Nitrogen Oxides standards Indoor coils with the same letter designation will physically match the furnace.
FETURES Contents Blower Data..................... 7 Dimensions - Furnace/Coil Combined Dimensions. 3 Dimensions - Horizontal Position........... Dimensions - Upflow Position............ 0 Features........................ 2 Gas Heat ccessories................. 8 Installation Clearances................. 7 Model Number Identification.............. Optional ccessories.................. 8 Optional ccessory Dimensions........... 2 Specifications..................... 6 Termination Kits Usage................. 9 Vent Lengths...................... 9 WRRNTY Duralok Plus 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. Blower data from unit tests conducted in Lennox Laboratory air test chamber. ll models are approved by the California Energy Commission and meet California Seasonal Efficiency requirements and California Nitrogen Oxides (NOx) Standards. Energy Star certified units are designed to use less energy, help save money on utility bills, and help protect the environment. ISO 900 Registered Manufacturing Quality System. PPLICTIONS Input capacities of 44,000, 66,000, 88,000, 0,000 and 32,000 Btuh. Energy efficiency (FUE) of 93%. Compact cabinet for upflow, horizontal-left or horizontalright applications without any modifications. Removable bottom seal panel shipped in place for side return air is easily removed for bottom/end return air 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. Each unit factory test operated to ensure proper operation. ML93UH / Page 2 K B D H F E C G L I J HETING SYSTEM B Lennox Duralok Plus Heat Exchanger ssembly Lennox developed heat exchanger assembly consists of primary heat exchanger and secondary condenser coil assembly. Main multi-pass crimped seam design clamshell type heat exchanger. Constructed of heavygauge, aluminized steel. Designed for normal expansion and contraction with maximum efficiency and minimum resistance to air flow. C Secondary heat exchanger condenser coil constructed of aluminum fins fitted to stainless steel tubes. Coil is factory tested for leaks. Condensate drain header box assembly located on front of coil. Compact size of complete heat exchanger assembly permits low overall design of furnace cabinet. Heat exchanger assembly has been laboratory life cycle tested in excess of industry standards..
FETURES D E F G HETING SYSTEM (CONTINUED) Lennox Designed Header Box Header box on end of condenser coil collects flue condensate for disposal through condensate drains. The drains are located on each side of the cabinet for easy field installation of condensate drain trap. Only one drain is used, the other drain is sealed. Condensate drain trap is included with the unit for field installation. Lennox Designed Flue Condensate Trap ssembly Condensate trap assembly is mounted outside the conditioned air stream. ssembly can be mounted on either side of cabinet in upflow applications. ssembly is mounted below the cabinet in horizontal applications. Can also be mounted remotely (up to 5 ft. away) from unit. See Dimension Drawing and Installation Instructions. 90 street elbow furnished for ease of drain trap installation. Drain connection can be made with field provided PVC pipe or PVC coupling. Drain cap on trap allows easy cleaning and winterizing. Inshot Burners luminized steel inshot burners provide efficient, trouble-free operation. Burner venturi mixes air and gas in correct proportion for proper combustion. Burner 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. Operates only during heating cycle. Pressure Switch Proves Combustion ir Inducer operation before allowing gas valve to open. H Flame Rollout Switches (2) Manual reset switches are factory installed on the front of the burner box. Switch provides protection from abnormal operating conditions. Limit Control utomatic reset, primary limit is accurately located on header box on all units. OPTIONS High ltitude Orifice Kits Required on all units for proper operation at altitudes from 750 to 0,000 ft. Kits are available for natural gas and LPG/propane. High ltitude Pressure Switch Kit Required for proper unit operation on installations above 4500 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. DIRECT VENT / NON-DIRECT VENT Sealed combustion system Furnace features a sealed combustion system and can be installed in either Direct Vent or Non-Direct applications. In Direct Vent applications, combustion air is supplied from outdoors and flue gases are discharged outdoors. In Non-Direct Vent applications, combustion air is supplied from indoors and flue gases are discharged outdoors. OPTIONS Termination Kits Facilitates installation of combustion air intake pipe and flue exhaust pipe. Refer to venting table in this bulletin to determine pipe size needed and proper termination kit required. See Optional ccessories table and dimension drawings. Termination Kit - Concentric - Direct Vent pplications 2 or 3 inch kit contains concentric termination assembly, reducer bushing and 45 elbow. 2 inch kit for -045-070 models contains an outdoor exhaust accelerator. Kit requires single hole penetration of roof or wall for installation. Roof Termination Flashing Kit is available for use with 2 inch Kits. CS certified. ML93UH / Page 3
FETURES I DIRECT VENT / NON-DIRECT VENT Sealed combustion system (continued) OPTIONS Termination Kit - Flush-Mount Kit contains flush-mount termination, accelerator, mounting template and hardware. Kit may be used with 2, 2-/2 or 3 in. pipe. Termination Kits - Wall ssembly Close Couple (US Only) - Direct Vent pplications 2 or 3 inch kit consists of close-couple, side-by-side PVC piping with galvanized steel wall cover plate for sealing and isolating piping penetration of the wall. Piping spacing and length is sized for proper wall installations. CS certified. Close Couple WTK (Canada Only) - Direct Vent pplications 2 or 3 inch kit contains one insulated faceplate, one insulated exhaust pipe, elbow and fittings. Wall Ring - Direct Vent or Non-Direct Vent pplications 2 inch kit contains 2 stainless steel outside seal caps, 2 galvanized steel inside seal caps, 4 seal rings for the caps and 8 inch insulation sleeve for sealing and isolating intake and exhaust piping penetration of wall. Maintain a maximum of 6 inches between the inlet and outlet openings in the installation of the pipes. Roof Termination Flashing Kit 2 or 3 inch kit contains two neoprene rubber roof flashings for vertical venting through a roof. Vent pipe and insulation not furnished. lso available for use with 2 inch (use 3 inch flashing) Concentric Vent Termination Kits used in vertical venting rooftop applications. CONTROLS SureLight Integrated Furnace Control Contains all necessary controls and relays to operate furnace. Combustion air inducer is controlled 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. Control continuously monitors line voltage and maintains the igniter power at a constant level to provide consistent lighting and maximum igniter life. 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. J Fan control consists of adjustable blower timed-off delay (60, 90, 20, 80 seconds - factory setting 20 seconds) and fixed blower timed-on delay (30 seconds). For air-conditioning applications, blower is automatically energized on thermostat demand for cooling. Integrated furnace control has one red LED to indicate status and indicate diagnostic codes. Push button recall of the last 5 diagnostic codes aids in troubleshooting. Integrated furnace control has built-in twinning capability ( TWIN terminal on control) to operate two furnaces simultaneously without any additional controls. field supplied isolation relay is required to operate the twinned (no thermostat connection) furnace. Two accessory terminals furnished for additional power supply requirements for 20 volt (less than amp) power humidifiers and powered air cleaners. 24 Volt Transformer Furnished and factory installed in control box. 40V transformer has fuse wired in series. Field Wiring Make-up Box Furnished for line voltage wiring. Factory installed internally on left side of furnace. Box may be installed internally or externally on either side of furnace. OPTIONS Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat bulletins in Controls Section and Lennox Price Book for selection. Night Service Kit Contains most commonly used service parts: Furnace control Igniter Flame sensor Gas valve Transformer Service Manual Universal Service Kit - Switches Kit contains: Primary limits (for each model) Pressure switches (for each model) Flame rollout switches (for each model) BLOWER Multi-speed direct drive blower. Statically and dynamically balanced. Resiliently mounted. Blower assembly easily removed for servicing. Blower speeds are easily changed on the integrated furnace control. See blower performance tables. ML93UH / Page 4
FETURES K L CBINET Low-profile, narrow width cabinet allows easy installation in upflow or horizontal applications. Heavy-gauge, cold rolled steel construction. Pre-painted cabinet finish. 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. Complete service access. Safety interlock switch automatically shuts off power to unit when blower compartment access door is removed. Gas piping and electrical inlets are provided in both sides of cabinet. 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 with transition, to accommodate 20 x 25 x in. cleanable air filter. Required to maintain proper air velocity. 2. Single side return air with Optional Return ir Base 3. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. See Blower Performance Tables for additional information. Coil Match-up ll furnaces exactly match C33 and CX34 cased upflow indoor coils and CH33 horizontal indoor coils with same letter designation in model number. No adaptor required. 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. OPTIONS Condensate Drain Heat Cable Kits Self-limiting wattage heat cable prevents condensate drain from freezing in unconditioned areas. vailable in 6, 24 or 50 ft. lengths. Heat Cable Tape: 66 ft. length, /2 in. wide fiberglass. 60 ft. length, 2 in. wide aluminum foil. 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. Crawl Space Vent Drain Kit llows venting through a crawl space for upflow and horizontal applications. Includes 2 or 3 in. sanitary tee, 2 in. PVC assembly, PVC boot and clamp. Return ir Base On furnaces with side return air and condensate trap on the same side of the cabinet, a field fabricated transition or Return ir Base 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. 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. FILTER (NOT FURNISHED) Filter and provisions for external mounting must be field provided. OPTIONS 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 Base 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. ML93UH / Page 5
SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML93UH045XP24B ML93UH045XP36B ML93UH070XP24B FUE 93% 93% 93% Input - Btuh 44,000 44,000 66,000 Output - Btuh 4,000 42,000 62,000 Temperature rise range - F 40-70 25-55 50-80 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 Gas pipe size IPS /2 /2 /2 Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4 with furnished 90 street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt with field supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT Wheel nom. dia. x width - in. 0 x 8 0 x 8 0 x 8 Motor output - hp /5 /3 /5 Tons of add-on cooling.5-2 2.5-3.5-2 ir Volume Range - cfm 390-40 700-600 390-40 Voltage 20 volts - 60 hertz - phase Blower motor full load amps 3. 6. 3. Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 20 22 25 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. SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML93UH070XP36B ML93UH090XP36C ML93UH090XP48C FUE 93% 93% 93% Input - Btuh 66,000 88,000 88,000 Output - Btuh 62,000 83,000 83,000 Temperature rise range - F 40-70 50-80 40-70 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 Gas pipe size IPS /2 /2 /2 Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4 with furnished 90 street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt with field supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT Wheel nom. dia. x width - in. 0 x 8 0 x 8 0 x 0 Motor output - hp /3 /3 /2 Tons of add-on cooling 2.5-3 2-3 3-4 ir Volume Range - cfm 660-65 695-620 900-2025 Voltage 20 volts - 60 hertz - phase Blower motor full load amps 6. 6. 8.2 Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 27 43 46 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. ML93UH / Page 6
SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML93UH0XP48C ML93UH0XP60C ML93UH35XP60D FUE 93% 93% 93% Input - Btuh 0,000 0,000 32,000 Output - Btuh 04,000 04,000 24,000 Temperature rise range - F 50-80 40-70 45-75 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 Gas pipe size IPS /2 /2 /2 Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4 with furnished 90 street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt with field supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT Wheel nom. dia. x width - in. 0 x 0 ½ x 0 ½ x 0 Motor output - hp /2 Tons of add-on cooling 3-4 4-5 4-5 ir Volume Range - cfm 850-2030 20-2525 340-2800 Voltage 20 volts - 60 hertz - phase Blower motor full load amps 8.2.5.5 Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 55 6 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) Sides Rear Top/Plenum Front Front (service/alcove) Floor 0 inches (0 mm) 0 inches (0 mm) inch (25 mm) 0 inches (0 mm) 24 inches (60 mm) 2 Combustible NOTE ir for combustion must conform to the methods outlined in the National Fuel Gas Code (NFP 54/NSI Z223.) or the National Standard of Canada CN/CS B49. Natural Gas and Propane Installation Code. 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. In Canada flue sizing must conform to the methods outlined in National Standard of Canada CN/CS B49.. llow proper clearances to accommodate condensate trap and vent pipe installation. 2 Do not install the furnace directly on carpeting, tile, or other combustible materials other than wood flooring. ML93UH / Page 7
OPTIONL CCESSORIES - ORDER SEPRTELY CBINET CCESSORIES B Width Models C Width Models D Width Models Horizontal Suspension Kit - Horizontal only 5W0 5W0 5W0 Return ir Base - Upflow only 50W98 50W99 5W00 CONDENSTE DRIN KITS Condensate Drain Heat Cable 6 ft. 26K68 26K68 26K68 24 ft. 26K69 26K69 26K69 50 ft. 26K70 26K70 26K70 Heat Cable Tape Fiberglass - /2 in. x 66 ft. 36G53 36G53 36G53 luminum foil - 2 in. x 60 ft. 6P89 6P89 6P89 Crawl Space Vent Drain Kit 5W8 5W8 5W8 CONTROLS Twinning Kit 5L38 5L38 5L38 FILTER KITS ir Filter and Rack Kit NIGHT SERVICE KIT Horizontal (end) Size of filter - in. 87L96-8 x 25 x 87L97-20 x 25 x 87L98-25 x 25 x Side Return Single 44J22 44J22 44J22 Ten Pack 66K63 66K63 66K63 Size of filter - in. 6 x 25 x 6 x 25 x 6 x 25 x Night Service Kit 68W80 68W80 68W80 Universal Service Kit - Switches 89W20 89W20 89W20 TERMINTION KITS See Installation Instructions for specific venting information. Termination Kits - Direct Vent pplications Only Termination Kits - Direct or Non- Direct vent Concentric US - 2 in. 7M80 69M29 - - - 3 in. - - - 60L46 60L46 Canada - 2 in. 44W92 44W92 - - - 3 in. - - - 44W93 44W93 Flush-Mount 2, 2-/2 or 3 in. 5W 5W 5W Wall - Close Couple Wall - Close Couple WTK 2 Roof Termination Flashing Kit - Direct or Non-Direct Vent (2 flashings) Cleanable polyurethane frame type filter. 2 Kits contain enough parts for two, non direct vent installations. 3 Non-direct vent only. US - 2 in. 22G44 - - - - - - 3 in. 44J40 44J40 44J40 Canada - 2 in. 30G28 - - - - - - 3 in. 8J20 8J20 8J20 Roof 2 in. 5F75 5F75 - - - Wall Ring Kit 2 in. 5F74 3 5F74 - - - 2 in. 44J4 44J4 44J4 NOTE - Termination Kits 44W92, 44W93, 30G28, 8J20 are certified to ULC S636 standard for use in Canada only. 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 LPG/Propane High ltitude Orifice Kit 450-7500 ft. 750-0,000 ft. 0-7500 ft. 0-7500 ft. 750-0,000 ft. 750-0,000 ft. all models 93W87 93W88 69W73 73W8 73W37 68W68 ML93UH / Page 8
TERMINTION KITS USGE Concentric Terminations Input Size 045 070 090 Vent Pipe Diameter in. 3 7M80 3, 4 44W92 Concentric Kits Close Couple Kits Standard Terminations Wall Ring Kit 2 in. 3 in. 2 in. 3 in. 2 in. 69M29 60L46 4 44W93 22G44 4 30G28 44J40 4 8J20 Flush Mount kit 2, 2-/2 or 3 in. Outdoor Exhaust ccelerator (Diameter X Length) For use with Close Couple and Wall Ring Kits -/2 x 2 in. 2 x 2 in. 5F74 5W Field Provided 2 Yes - - - - - - Yes Yes Yes Yes Yes - - - 2-/2 Yes - - - - - - Yes Yes Yes Yes Yes - - - 3 Yes - - - - - - Yes Yes Yes Yes Yes - - - 2 Yes - - - - - - Yes Yes Yes Yes Yes - - - 2-/2 Yes - - - - - - Yes Yes Yes Yes Yes - - - 3 Yes - - - - - - Yes Yes Yes Yes Yes - - - 2 - - - Yes Yes - - - Yes 2 Yes Yes - - - Yes 2-/2 - - - Yes Yes - - - Yes 2 Yes Yes - - - Yes 3 - - - Yes Yes - - - Yes 2 Yes Yes - - - Yes 2 - - - Yes Yes - - - Yes - - - Yes - - - Yes 0 2-/2 - - - Yes Yes - - - Yes - - - Yes - - - Yes 3 - - - Yes Yes - - - Yes - - - Yes - - - Yes 35 3 - - - - - - Yes - - - Yes - - - Yes - - - Yes Requires field provided -/2 in. outdoor exhaust accelerator. 2 Requires field provided 2 in. outdoor exhaust accelerator. 3 Concentric Kits 7M80 and 44W92 include -/2 in. outdoor exhaust accelerator, required when used with 045, 070 input models. ccelerator is not used with 090, 0, 35 input models. 4 Termination Kits 44W92, 44W93, 30G28, 8J20 are certified to ULC S636 standard for use in Canada only. VENT LENGTHS - FEET STNDRD TERMINTION T ELEVTION 0-0,000 ft. Pipe Size 2 in. 2-/2 in. 3 in. Input 045 070 090 0 35 045 070 090 0 35 045 070 090 0 35 No. of 90 ELL 8 66 44 24 N/ 5 00 68 43 N/ 37 37 8 8 4 2 76 6 39 9 N/ 0 95 63 38 N/ 32 32 3 3 09 3 7 56 34 4 N/ 05 90 58 33 N/ 27 27 08 08 04 4 66 5 29 N/ N/ 00 85 53 28 N/ 22 22 03 03 99 5 6 46 24 N/ N/ 95 80 48 23 N/ 7 7 98 98 94 6 56 4 9 N/ N/ 90 75 43 8 N/ 2 2 93 93 89 7 5 36 4 N/ N/ 85 70 38 3 N/ 07 07 88 88 84 8 46 3 N/ N/ N/ 80 65 33 N/ N/ 02 02 83 83 79 9 4 26 N/ N/ N/ 75 60 28 N/ N/ 97 97 78 78 74 0 36 2 N/ N/ N/ 70 55 23 N/ N/ 92 92 73 73 69 CONCENTRIC TERMINTION ELEVTION 0-0,000 ft. Pipe Size 2 in. 2-/2 in. 3 in. Input 045 070 090 0 35 045 070 090 0 35 045 070 090 0 35 No. of 90 ELL 73 58 42 22 N/ 05 90 64 39 N/ 2 2 4 4 05 2 68 53 37 7 N/ 00 85 59 34 N/ 6 6 09 09 00 3 63 48 32 2 N/ 95 80 54 29 N/ 04 04 95 4 58 43 27 N/ N/ 90 75 49 24 N/ 06 06 99 99 90 5 53 38 22 N/ N/ 85 70 44 9 N/ 0 0 94 94 85 6 48 33 7 N/ N/ 80 65 39 4 N/ 96 96 89 89 80 7 43 28 2 N/ N/ 75 60 34 N/ N/ 9 9 84 84 75 8 38 23 N/ N/ N/ 70 55 29 N/ N/ 86 86 79 79 70 9 33 8 N/ N/ N/ 65 50 24 N/ N/ 8 8 74 74 65 0 28 3 N/ N/ N/ 60 45 9 N/ N/ 76 76 69 69 60 ML93UH / Page 9
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 with transition, to accommodate 20 x 25 x in. cleanable air filter. Required to maintain proper air velocity. 2. Single side return air with Optional Return ir Base 3. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. See Blower Performance Tables for additional information. 2 Optional Side Return ir Filter Kit is not for use with the Optional Return ir Base. 2 (5) D COMBUSTION INTKE 3-3/8 (86) 2-7/8 (73) EXHUST OUTLET SUPPLY OPENING Flue Condensate Trap ssembly Furnished for external field installation on either side of unit. (See installation instructions for additional information.) 7 (78) 2 OPTIONL SIDE RETURN FILTER KIT (Either Side) 23-3/4 (603) 25 (635) TOP VIEW B 9/6 (4) (25) Front Panel 27-3/4 (705) 9-7/6 (494) 9/6 (4) 2 OPTIONL SIDE RETURN FILTER KIT (Either Side) 33 (838) 6-9/6 (67) Left 9 (229) Right 2-5/8 (32) (Either Side) ELECTRICL INLET (Either Side) 2 (5) (Either Side) GS PIPING INLET (Either Side) CONDENSTE TRP CONNECTION (Either Side) 6-/2 (65) (Either Side) 4-3/4 (375) 6 (406) 23 (584) Side Return ir Opening (Either Side) 4 (356) -/2 (38) FLOW -5/6 (49) 3/4 (9) C Bottom Return ir Opening 3/4 (9) 5/8 (6) 3-/4 (83) 23-/2 (597) Bottom Return ir Opening FRONT VIEW SIDE VIEW Model No. ML93UH / Page 0 ML93UH045XP24B ML93UH045XP36B ML93UH070XP24B ML93UH070XP36B ML93UH090XP36C ML93UH090XP48C ML93UH0XP48C ML93UH0XP60C B C D in. mm in. mm in. mm in. mm 7-/2 446 6-3/8 46 6 406 7-5/8 94 2 533 9-7/8 505 9-/2 495 9-3/8 238 ML93UH35XP60D 24-/2 622 23-3/8 594 23 584 -/8 283
DIMENSIONS - INCHES (MM) - HORIZONTL POSITION LEFT-HND DISCHRGE 6-/2 (65) Bottom 2-5/8 (32) Bottom 6-9/6 (67) Top 9 (229) Bottom CONDENSTE TRP CONNECTION (Bottom) FLOW ELECTRICL INLET (Top or Bottom) 9/6 (4) 27-3/4 (705) COMBUSTION INTKE 2 (5) Top or Bottom TOP VIEW 33 (838) GS PIPING INLET (Top or Bottom) (25) Front Panel 3/4 (9) 27-3/4 (705) 9/6 (4) B 9-7/6 (494) SUPPLY OPENING 2-7/8 (73) D FLOW 3-/4 (95) C 23-/2 (59) RETURN OPENING EXHUST OUTLET END VIEW 3-3/8 (86) 2 (5) FRONT VIEW RIGHT-HND DISCHRGE END VIEW CONDENSTE TRP CONNECTION (Bottom) FLOW 6-/2 (65) Bottom 2-5/8 (32) Bottom 9 (229) Top 6-9/6 (67) Bottom 2 (5) Top or Bottom 27-3/4 (705) ELECTRICL INLET (Top or Bottom) (25) Front Panel TOP VIEW 33 (838) GS PIPING INLET (Top or Bottom) EXHUST OUTLET 2 (5) 3-3/8 (86) 27-3/4 (705) 23-/2 (59) RETURN OPENING C 3-/4 (95) FLOW D 2-7/8 (73) 9-7/6 (494) SUPPLY OPENING B 9/6 (4) END VIEW 3/4 (9) FRONT VIEW COMBUSTION INTKE END VIEW 9/6 (4) Model No. ML93UH045XP24B ML93UH045XP36B ML93UH070XP24B ML93UH070XP36B ML93UH090XP36C ML93UH090XP48C ML93UH0XP48C ML93UH0XP60C B C D in. mm in. mm in. mm in. mm 7-/2 446 6-3/8 46 6 406 7-5/8 94 2 533 9-7/8 505 9-/2 495 9-3/8 238 ML93UH35XP60D 24-/2 622 23-3/8 594 23 584 -/8 283 ML93UH / Page
OPTIONL CCESSORY DIMENSIONS - INCHES (MM) HORIZONTL (END) FILTER KIT 5/8 (6) 24 3/4 (629) -/4 (32) 5/8 (6) B RETURN OPENING 23 /2 (597) 5/8 (6) FLOW Furnace Cabinet Width Catalog Number B in. mm in. mm B 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 FILTER (Furnished) FRONT VIEW CONDENSTE TRP Optional Return ir Base (Upflow pplications Only - For use with B, C and D cabinets) FURNCE FRONT INDOOR QULITY CBINET (PCO, Filter Cabinet, etc.) IF BSE IS USED WITHOUT IQ CBINET, SINGLE RETURN PLENUM MUST COVER BOTH UNIT ND RETURN BSE 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 OPENINGS (Either Side) 22-7/6 (570) Overall (Maximum) 7-/2 (446) B Width (50W98) 2 (533) C Width (50W99) 24-/2 (622) D Width (5W00) OPTIONL RETURN BSE 23 (584) 26-7/8 (683) SIDE VIEW 3/4 (9) NOTE- Optional Side Return ir Filter Kits are not for use with Optional Return ir Base. Both 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. ML93UH / Page 2
DIMENSIONS - INCHES (MM) - FURNCE/COIL COMBINED DIMENSIONS 33 (838) B UPFLOW POSITION Uncased Cased Model No (CX34 - cased only) B B CX34 C33 in. mm in. mm in. mm in. mm CX34-8/24B-6F C33-24B CX34-8/24C-6F C33-24C 6-/2 49 49-/2 257 3-7/8 352 46-7/8 9 CX34-25B-6F C33-25B 8-/2 470 5-/2 308 5-7/8 403 48-7/8 24 CX34-30B-6F C33-30B CX34-30C-6F C33-30C 20-/2 52 53-/2 359 7-3/4 45 50-3/4 289 CX34-3B-6F C33-3B 22-/2 572 55-/2 40 20-/4 54 53-/4 353 CX34-36B-6F C33-36B 24-/2 622 57-/2 46 2-7/8 556 54-7/8 394 CX34-36C-6F C33-36C 24-/2 622 57-/2 46 2-/4 540 54-/4 378 CX34-38B-6F C33-38B 24-/2 622 57-/2 46 22 559 55 397 CX34-42B-6F C33-42B 24-/2 622 57-/2 46 2-7/8 556 54-7/8 394 CX34-43B-6F C33-43B 27-/2 699 60-/2 537 26-/4 667 59-/4 505 CX34-43C-6F C33-43C 27-/2 699 60-/2 537 25-3/4 654 58-3/4 492 - - - C33-44C 24-/2 622 57-/2 46 2-/2 546 54-/2 384 CX34-44/48B-6F C33-48B 24-/2 622 57-/2 46 22-/8 562 55-/8 400 CX34-44/48C-6F C33-48C 24-/2 622 57-/2 46 2-/2 546 54-/2 384 CX34-49C-6F C33-49C 29-/2 749 62-/2 588 28-/2 724 6-/2 562 CX34-50/60C-6F C33-50/60C 27-/2 699 60-/2 537 24-3/4 629 57-3/4 467 CX34-60D-6F C33-60D 25-/2 648 58-/2 486 24-3/4 629 57-3/4 467 CX34-62C-6F C33-62C 3-/2 800 64-/2 638 30-5/8 778 63-5/8 66 CX34-62D-6F C33-62D 29-/2 749 62-/2 588 28-3/4 730 6-3/4 568 B 33 (838) HORIZONTL POSITION CH33-36B-2F CH33-36C-2F CH33-44/48B-2F CH33-50/60C-2F Model Number CH33-42B-2F CH33-48C-2F CH33-60D-2F B in. mm in. mm 26-/2 673 59-/2 5 CH33-62D-2F 3-/2 800 64-/2 638 ML93UH / Page 3
OPTIONL CCESSORY DIMENSIONS - INCHES (MM) FLUSH-MOUNT VENT TERMINTION KIT (5W) With 2 or 2-/2 in. (5 or 64 mm) PVC pipe Exhaust Intake (Behind Plate) Seal all openings (typical) With 3 in. (76 mm) PVC pipe Exhaust Intake (Behind Plate) 2-3/8 (60) 2 (305) minimum (recommended) 2 (5) PVC pipe 3 (76) PVC pipe NOTE - PVC pipe and fittings are not furnished When required Use and must be field furnished. Field Provided 2-/2 to 2 in. (64 to 5 mm) Coupling 2-/2 (64) PVC pipe ML93UH / Page 4
OPTIONL CCESSORY DIMENSIONS - INCHES (MM) CONCENTRIC WLL TERMINTION PPLICTIONS CONCENTRIC ROOF TERMINTION PPLICTIONS EXHUST OUTSIDE WLL INTKE EXHUST 2 (305) Minimum bove verage Snow ccumulation FLSHING (Not Furnished) INTKE CLMP (Not Furnished) INTKE 2 (305) Minimum bove Grade or verage Snow ccumulation CLMP SHEET METL STRP (Clamp and sheet metal strap must be field installed to support the weight of the termination kit.) GRDE ELBOW (Field Supplied) 7M80 / 69M29 / 44W92 2 inch kits 60L46 / 44W93 3 inch kits See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. 3 /2 (89) 2 in. kits 4 /2 (4) 3 in. kits TERMINTION SSEMBLY (Furnished) 6 /2 (65) INTKE 6 (52) EXHUST Outdoor Exhaust ccelerator included with 7M80/44W92 Cat. No. 7M80 69M29 44W92 (Canada) B in. mm in. mm 33 3/8 848 6 3/4 425 29 737 5 /2 394 60L46 38 7/8 987 2 3/6 538 44W93 (Canada) 36 /8 98 9 /2 495 NOTE Typical illustration for dimensions only. Design may vary depending on kit ordered. WLL SSEMBLY TERMINTION KIT RING KIT 5F74 2 inch (5 mm) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. DIRECT VENT PPLICTION NON-DIRECT VENT PPLICTION NOTE - EXHUST PIPE SHOWN Kit Contains Enough Parts For Two Installations 2 in. (305 mm) - 2 in. (5 mm) dia. exhaust pipe 20 in. (508 mm) - 3 in. (76 mm) dia. exhaust pipe maximum length without support 2 in. (305 mm) - 2 in. (5 mm) dia. exhaust pipe 20 in. (508 mm) - 3 in. (76 mm) dia. exhaust pipe maximum length without support 8 in. (203 mm) minimum 6 in. (52 mm) maximum NOTE 2 in. (305 mm) minimum height above average snow accumulation (from bottom of vent pipe). NOTE 2 in. (305 mm) minimum height above average snow accumulation (from bottom of vent pipe). ML93UH / Page 5
OPTIONL CCESSORY DIMENSIONS - INCHES (MM) WLL TERMINTION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRDE CLERNCE 2 inch (5 mm) 22G44 (US) 3 inch (76 mm) 44J40 (US) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than2 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WLL SUPPORT 8 (203) MIN. Between Ends of Exhaust and Intake Pipe 2 (305) MX. for 2 (5) Dia. Exhaust 20 (508) MX. for 3 (76) Dia. Exhaust 2 (305) INTKE 6 (52) Maximum EXHUST INTKE 5 (27) /2 (3) FOM INSULTION (Field Furnished) EXHUST 8 (203) MIN. 2 (305) Minimum bove Grade or verage Snow ccumulation GRDE 5-/2 (40) 2 (305) Minimum bove Grade or verage Snow ccumulation GRDE 2 (305) MX. for 2 (5) Dia. Exhaust 20 (508) MX. for 3 (76) Dia. Exhaust WLL TERMINTION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRDE CLERNCE 2 inch (5 mm) 30G28 (WTK Canada) 3 inch (76 mm) 8J20 (WTK Canada) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than2 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WLL SUPPORT INTKE 6 (52) Maximum 2 (305) MX. for 2 (5) Dia. Exhaust 20 (508) MX. for 3 (76) Dia. Exhaust 6 (52) MIN. EXHUST INTKE 5 (27) 2 (305) /2 (3) FOM INSULTION (Field Furnished) EXHUST 6 (52) MIN. 2 (305) Minimum bove Grade or verage Snow ccumulation GRDE 2 (305) MX. for 2 (5) Dia. Exhaust 20 (508) MX. for 3 (76) Dia. Exhaust 5-/2 (40) 2 (305) Minimum bove Grade or verage Snow ccumulation GRDE ML93UH / Page 6
BLOWER DT ML93UH045XP24B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 40 455 920 365 765 295 70 265 0.0 35 445 900 360 765 290 690 255 0.20 25 430 895 350 755 285 680 255 0.30 090 45 870 340 725 280 660 250 0.40 065 405 870 325 75 270 635 245 0.50 020 390 825 35 675 260 605 235 0.60 945 365 780 300 640 250 555 225 0.70 90 350 740 295 585 240 505 220 0.80 790 325 670 275 50 225 455 205 0.90 735 30 575 255 460 220 390 95 ML93UH045XP36B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 600 700 370 590 60 475 005 400 0.0 600 685 355 565 55 465 05 390 0.20 550 650 330 540 50 445 000 380 0.30 480 625 295 55 40 430 975 365 0.40 425 590 280 490 05 45 975 350 0.50 355 565 90 460 085 395 940 335 0.60 320 545 65 435 030 375 900 35 0.70 225 500 0 425 975 355 855 30 0.80 35 480 050 395 920 330 780 280 0.90 025 445 950 360 800 295 700 255 ML93UH070XP24B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 40 455 920 365 765 295 70 265 0.0 35 445 900 360 765 290 690 255 0.20 25 430 895 350 755 285 680 255 0.30 090 45 870 340 725 280 660 250 0.40 065 405 870 325 75 270 635 245 0.50 020 390 825 35 675 260 605 235 0.60 945 365 780 300 640 250 555 225 0.70 90 350 740 295 585 240 505 220 0.80 790 325 670 275 50 225 455 205 0.90 735 30 575 255 460 220 390 95 ML93UH070XP36B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 65 680 355 570 40 480 030 400 0.0 565 660 365 545 50 465 020 385 0.20 535 630 340 525 50 440 025 375 0.30 440 600 300 500 0 420 000 350 0.40 405 570 255 470 075 400 975 345 0.50 340 535 200 445 045 380 945 330 0.60 255 500 25 420 995 355 875 30 0.70 65 475 080 395 935 335 820 290 0.80 060 455 990 365 870 35 750 265 0.90 955 425 895 345 750 285 660 245 ML93UH090XP36C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 620 745 340 620 30 500 965 405 0.0 60 720 335 595 35 490 975 395 0.20 565 695 335 565 45 465 970 385 0.30 525 665 300 555 35 455 970 370 0.40 485 635 295 520 0 435 960 355 0.50 43 600 260 495 090 405 940 345 0.60 365 570 20 475 035 390 900 330 0.70 295 535 55 445 995 365 860 305 0.80 200 505 065 45 930 340 745 270 0.90 060 460 955 375 820 305 695 260 ML93UH090XP48C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2025 900 690 780 395 645 200 540 0.0 995 880 705 760 390 635 205 525 0.20 925 835 675 75 405 605 205 505 0.30 850 795 640 680 400 580 70 490 0.40 790 760 575 645 395 560 70 475 0.50 700 725 540 625 350 535 40 450 0.60 60 690 455 580 295 505 00 430 0.70 540 645 365 550 225 480 030 405 0.80 45 65 265 50 25 445 980 385 0.90 270 565 65 470 060 420 900 350 ML93UH0XP48C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2030 905 750 805 425 665 225 530 0.0 950 865 755 770 430 630 25 55 0.20 935 840 675 735 455 60 230 505 0.30 885 80 660 685 40 585 200 485 0.40 830 780 585 645 385 570 90 470 0.50 750 740 565 630 320 535 65 455 0.60 660 695 485 585 280 505 05 425 0.70 540 665 380 555 230 485 060 405 0.80 420 65 290 520 40 445 945 375 0.90 290 575 75 470 045 40 850 350 ML93UH / Page 7
BLOWER DT ML93UH0XP60C PERFORMNCE (Less Filter) ir Volume / Watts at Different Blower Speeds External Bottom Return ir, Side Return ir with Optional Return Static ir Base, Return ir from Both Sides or Return ir from Pressure Bottom and One Side. in. w.g. Single Side Return ir ir volumes in bold require field fabricated transition to accommodate 20 x 25 x in. air filter in order to maintain proper air velocity. High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2525 560 275 65 820 905 465 725 2520 545 235 50 750 905 445 720 0.0 2585 545 2200 35 860 900 475 70 2555 545 235 5 775 890 470 75 0.20 255 505 250 0 840 890 490 705 2465 480 205 085 775 875 465 705 0.30 2445 445 235 065 790 870 500 690 2370 430 2045 055 750 855 460 690 0.40 2340 385 2065 035 770 845 500 675 2275 375 990 00 730 830 460 680 0.50 2230 350 985 985 755 80 470 665 285 345 930 970 690 800 460 655 0.60 230 295 920 950 685 785 425 640 2060 290 850 935 650 780 420 635 0.70 2030 250 85 905 640 760 405 625 930 230 760 900 580 750 355 60 0.80 920 90 735 865 560 725 350 605 825 80 660 855 505 70 290 585 0.90 735 35 620 830 450 685 270 575 665 30 520 80 45 675 20 560 ML93UH35XP60D PERFORMNCE (Less Filter) ir Volume / Watts at Different Blower Speeds External Bottom Return ir, Side Return ir with Optional Return Static ir Base, Return ir from Both Sides or Return ir from Pressure Bottom and One Side. in. w.g. Single Side Return ir ir volumes in bold require field fabricated transition to accommodate 20 x 25 x in. air filter in order to maintain proper air velocity. High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2800 75 255 60 730 900 375 695 2720 685 20 35 670 905 355 705 0.0 2770 665 270 45 740 895 45 700 2660 650 20 5 725 895 390 700 0.20 2690 635 250 0 770 890 450 700 2600 585 225 090 750 885 450 695 0.30 2590 560 240 080 785 870 455 695 2535 525 2075 065 750 865 465 685 0.40 2500 535 205 055 785 855 475 690 2400 490 2055 030 75 845 460 680 0.50 2420 465 2050 025 770 835 465 665 2335 420 2000 005 725 825 455 660 0.60 2330 40 205 995 720 80 460 655 2270 385 950 970 720 800 445 650 0.70 2225 370 965 960 690 785 450 650 275 335 895 950 665 780 430 635 0.80 250 335 875 925 655 755 435 630 2075 295 840 90 605 745 400 620 0.90 2025 290 830 890 575 720 375 605 975 255 755 875 540 725 340 590 ML93UH / Page 8
REVISIONS Sections Dimensions Gas Heat ccessories Optional ccessories Specifications Description of Change Revised Drain Trap drawing. Updated High ltitude Pressure Switch usage. Updated Night Service Kit. Revised drain connection sizes. Visit us at www.lennox.com For the latest technical information, www.lennoxdavenet.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. 202 Lennox Industries, Inc.