ELITE SERIES Upflow / Horizontal - Two-Stage Heat

PRODUCT SPECIFICTIONS GS FURNCES EL280UH ELITE SERIES Upflow / Horizontal - Two-Stage Heat ulletin No. 2063 June 205 Supersedes January 205 FUE - 80% Input - 66,000 to 32,000 tuh Nominal dd-on Cooling - 2 to 5 Tons MODEL NUMER IDENTIFICTION EL 2 80 UH 090 X P 48 Unit Type EL = Elite Series Stages 2 = Two-Stage FUE 80 = 80% Configuration UH = Upflow/Horizontal Nominal Gas Heat Input 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 24 = 2 ton 36 = 2-3.5 tons 48 = 3-4 tons 60 = 4-5 tons lower P = PSC Multi-Speed lower Motor 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... 4 Dimensions Furnace/Coil Combined Dimensions... 3 Dimensions - Horizontal Position... Dimensions - Upflow Position... 0 F Features... 2 Gas Heat ccessories... 9 G ltitude Derate... 9 L D E C Installation Clearances... 6 Model Number Identification... Optional ccessories... 9 Optional ccessory Dimensions... 2 Specifications... 7 K I H NOTE - EL280UH 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. EL280UH / Page 2 PPLICTIONS Input capacities of 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 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. NOTE - FURNCES CNNOT E TWINNED!

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 constructed of nickel plated copper enclosed in high temperature Teflon insulation for dependable operation. Two-Stage Gas Control Valve 24 volt redundant combination two-stage gas control valve combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control. Two-Speed Combustion ir Inducer Heavy duty, permanent split capacitor (PSC) two-speed blower prepurges heat exchanger and safely vents flue products. Dual pressure switches (low fire/high fire) prove 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. Flame Rollout Switches (2) Manual reset switches are factory installed on burner box. Switch provides protection from abnormal operating conditions. H Limit Controls utomatic reset, primary and secondary limits are accurately located. Primary limit factory installed on vestibule panel on all units, secondary limit factory installed on blower housing. Optional ccessories ltitude Pressure Switch Kit Required on most units for proper unit operation at altitudes from 450 to 0,000 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 Multi-speed direct drive blower. Statically and dynamically balanced. Resiliently mounted. 6 in. (52 mm) lower assembly easily removed for servicing. 7 in. (78 mm) lower speeds are easily changed on the integrated furnace control. See blower performance tables. EL280UH / Page 3

FETURES I CONTROLS SureLight Integrated Two-Stage Furnace Control oard 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. Jumper settings for single or two stage thermostat operation. Two selectable 2nd stage recognition times (0 and 5 minutes) are available on the board when the furnace is used with a single stage thermostat. When used with a two stage thermostat, furnace will only initiate second stage operation with a second stage thermostat demand. 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. Two accessory terminals furnished for additional power supply requirements for 20 volt (less than amp) power humidifiers and powered air cleaners. separate 24V accessory terminal is also provided for low voltage accessories. Ignition control has single red LED to indicate status and as an aid in troubleshooting. Optional ccessories Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat Product Specifications 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 Universal Service Kit - Switches Kit contains: Primary limits (for each model) Pressure switches (for each model) Flame rollout switches (for each model) Secondary limits (for each model) 24 Volt Transformer Furnished and factory installed outside of the control box. 40V transformer has circuit breaker 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. EL280UH / Page 4

FETURES J K L CINET -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. Fully insulated cabinet with foil faced insulation on sides and back of heating compartment and mat faced insulation in blower compartment. Sealed blower compartment. Inner blower compartment access panel seals blower compartment from air leakage. Cabinet door can be removed without any tools Complete service access. Safety interlock switch automatically shuts off power to unit when inner blower compartment access panel 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 second stage 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 ase 3. ottom return air. 4. Return air from both sides. 5. ottom and one side return air. See lower 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. 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. 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. 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. EL280UH / 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 Protection ssociation, Quincy, M 02269. This reprinted material is not the complete and official position of the National Protection ssociation on the referenced subject, which is represented only by the standard in its entirety. 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. EL280UH / Page 6

SPECIFICTIONS Gas Heating Performance Model No. EL280UH070P24 EL280UH070P36 EL280UH090P36 Model No. - Nox - - - EL280UH070XP36 - - - FUE 80% 80% 80% Input - tuh 66,000 66,000 88,000 Output - tuh 52,000 53,000 70,000 Temperature rise range - F 40-70 30-60 35-65 Gas Manifold Pressure (in. w.g.) 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 Nat. Gas / LPG/Propane Input - tuh 43,000 43,000 57,000 Output - tuh 35,000 35,000 46,000 Temperature rise range - F 25-55 20-50 25-55 Gas Manifold Pressure (in. w.g.).7 / 4.9.7 / 4.9.7 / 4.9 Nat. Gas / LPG/Propane static - in. w.g. Heating 0.5 0.5 0.5 Cooling 0.5 0.5 0.5 Connections Flue connection in. round 4 4 4 in. Gas pipe size IPS /2 /2 /2 Indoor Wheel nominal diameter x width - in. 0 x 7 0 x 8 0 x 9 lower Motor output - hp /5 /3 /3 Tons of add-on cooling.5-2 2-3.5 2-3.5 ir Volume Range - cfm 492-073 775-620 785-760 Electrical Data Voltage 20 volts - 60 hertz - phase lower motor full load amps 3. 6. 6. Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 22 26 4 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 Model No. EL280UH090P48 EL280UH0P48C Model No. - Nox EL280UH090XP48 - - - FUE 80% 80% Input - tuh 88,000 0,000 Output - tuh 69,000 86,000 Temperature rise range - F 30-60 35-65 Gas Manifold Pressure (in. w.g.) 3.5 / 0.0 3.5 / 0.0 Nat. Gas / LPG/Propane Input - tuh 57,000 72,000 Output - tuh 46,000 58,000 Temperature rise range - F 20-50 25-55 Gas Manifold Pressure (in. w.g.).7 / 4.9.7 / 4.9 Nat. Gas / LPG/Propane static - in. w.g. Heating 0.5 0.5 Cooling 0.5 0.5 Connections Flue connection in. round 4 4 in. Gas pipe size IPS /2 /2 Indoor Wheel nominal diameter x width - in. 0 x 0 0 x 0 lower Motor output - hp /2 /2 Tons of add-on cooling 3-4 3-4 ir Volume Range - cfm 020-2030 050-225 Electrical Data Voltage 20 volts - 60 hertz - phase lower motor full load amps 8.2 8.2 Maximum overcurrent protection 5 5 Shipping Data lbs. - package 44 6 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. EL280UH / Page 7

SPECIFICTIONS Gas Heating Performance Model No. EL280UH0P60C EL280UH35P60D Model No. - Nox EL280UH0XP60C - - - FUE 80% 80% Input - tuh 0,000 32,000 Output - tuh 87,000 06,000 Temperature rise range - F 30-60 35-65 Gas Manifold Pressure (in. w.g.) 3.5 / 0.0 3.5 / 0.0 Nat. Gas / LPG/Propane Input - tuh 72,000 86,000 Output - tuh 58,000 70,000 Temperature rise range - F 20-50 25-55 Gas Manifold Pressure (in. w.g.).7 / 4.9.7 / 4.9 Nat. Gas / LPG/Propane static - in. w.g. Heating 0.5 0.5 Cooling 0.5 0.5 Connections Flue connection in. round 4 2 4 in. Gas pipe size IPS /2 /2 Indoor Wheel nominal diameter x width - in. -/2 x 0 x lower Motor output - hp Tons of add-on cooling 4-5 4-5 ir Volume Range - cfm 470-2520 435-2750 Electrical Data Voltage 20 volts - 60 hertz - phase lower motor full load amps 0.5 Maximum overcurrent protection 5 5 Shipping Data lbs. - package 69 88 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. 2 Flue connection on the unit is 4 in. diameter. Most applications will require 5 in. venting and field supplied 4 x 5 in. adaptor. See Venting Tables in the Installation Instructions for detailed information. EL280UH / Page 8

OPTIONL CCESSORIES - ORDER SEPRTELY NOTE - FURNCES CNNOT E TWINNED! 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 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 SERVICE KITS Night Service Kit 84W46 84W46 84W46 84W46 Universal Service Kit - Switches 89W9 89W9 89W9 89W9 VENTING Vent daptor 6 in. conn. size upflow applications only 8M79 8M79 8M79 8M79 Cleanable polyurethane, frame-type filter. GS HET CCESSORIES - ORDER SEPRTELY Input ltitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas Kit Natural Gas ltitude Orifice Kit LPG/Propane ltitude Orifice Kit 0-4500 ft. 450-7500 ft. 750-0,000 ft. 0-7500 ft. 0-7500 ft. 750-0,000 ft. 750-0,000 ft. 070 No Change 9W53 73W35 K5 77W09 73W37 77W 090 No Change 9W53 73W35 K5 77W09 73W37 77W 0 No Change 9W53 73W35 K5 77W09 73W37 77W 35 No Change 73W33 73W34 K5 77W09 73W37 77W HIGH LTITUDE DERTE NOTE - Units may be installed at altitudes up to 4500 ft. above sea level without any modifications. t altitudes above 4500 ft. units must be derated to match information in the shaded area shown below. NOTE - This is the only permissible derate for these units. Input Gas Manifold Pressure (Outlet) in. w.g. 0-4500 Feet 450-7500 Feet 750-0,000 ft. Natural Gas LPG/Propane Natural Gas LPG/Propane Natural Gas LPG/Propane 070 3.5.7 0 4.9 3.2.5 0 4.9 3.5.7 0 4.9 090 3.5.7 0 4.9 3.2.5 0 4.9 3.5.7 0 4.9 0 3.5.7 0 4.9 3.2.5 0 4.9 3.5.7 0 4.9 35 3.5.7 0 4.9 2.8.5 0 4.9 3.5.7 0 4.9 Natural Gas litude Orifice Kit required. EL280UH / Page 9

DIMENSIONS - INCHES (MM) - UPFLOW POSITION NOTE - 60C and 60D size units that require air volumes over 800 cfm (850 L/s) must have one of the following:. Single side return air with transition, to accommodate 20 x 25 x in. (508 x 635 x 25 mm) cleanable air filter. Required to maintain proper air velocity. 2. Single side return air with optional Return ir ase 3. ottom return air. 4. Return air from both sides. 5. 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) -/2 (38) Front Panel 3 (76) Right 7 (78) 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) GS PIPING INLET (Either Side) ELECTRICL INLET (Either Side) 4-3/4 (375) 6 (406) 23 (584) Side Return ir Opening (Either Side) 4 (356) -/2 (38) IR FLOW -5/6 (49) 3/4 (9) C ottom Return ir Opening FRONT VIEW 3/4 (9) 5/8 (6) 3-/4 (83) 23-/2 (597) ottom Return ir Opening SIDE VIEW Model No. EL280UH070P24 EL280UH070P36 EL280UH090P36 EL280UH090P48 EL280UH0P48C EL280UH0P60C C D in. mm in. mm in. mm in. mm 4-/2 368 3-3/8 340 3 330 4-3/4 2 7-/2 446 6-3/8 46 6 406 6-/4 59 2 533 9-7/8 504 9-/2 495 8 203 EL280UH35P60D 24-/2 622 23-3/8 594 23 584 9-3/4 248 EL280UH / Page 0

DIMENSIONS - INCHES (MM) - HORIZONTL POSITION LEFT-HND IR DISCHRGE Flue outlet may be from end but furnace must be vented vertically 9-/8 (232) Top 8-5/8 (29) ottom FLUE OUTLET (Top) GS PIPING INLET (Top or ottom) IR FLOW ELECTRICL INLET (Top or ottom) 3-/4 (83) 27-3/4 (705) 9/6 (4) FLUE OUTLET (End) 3 5-3/8 (37) Top (76) 2-3/6 (56) ottom TOP VIEW 33 (838) -/2 (38) Front Panel 3/4 (9) 27-3/4 (705) 9/6 (4) 9-7/6 (494) SUPPLY IR OPENING D IR FLOW 3-/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) 7 (78) Flue outlet may be horizontal but furnace must be vented vertically FLUE OUTLET (Top) 3-/4 (83) 27-3/4 (705) -/2 (38) Front Panel 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) 3-/8 (79) 27-3/4 (705) 23-/2 (597) RETURN IR OPENING C 3-/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 EL280UH070P24 EL280UH070P36 4-/2 368 3-3/8 340 3 330 4-3/4 2 EL280UH090P36 EL280UH090P48 7-/2 446 6-3/8 46 6 406 6-/4 59 EL280UH0P48C EL280UH0P60C 2 533 9-7/8 504 9-/2 495 8 203 EL280UH35P60D 24-/2 622 23-3/8 594 23 584 9-3/4 248 EL280UH / Page

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. EL280UH / Page 2

DIMENSIONS INCHES (MM) - FURNCE/COIL COMINED DIMENSIONS 33 (838) UPFLOW POSITION Model No Cased Uncased (CX34 - cased only) CX34 C33 in. mm in. mm in. mm in. mm - - - C33-8 2-/2 38 45-/2 56 9-3/4 248 42-3/4 086 CX34-9-6F C33-9 6-/2 49 49-/2 257 9-3/4 248 42-3/4 086 - - - C33-24 6-/2 49 49-/2 257 4 356 47 94 CX34-8/24-6F CX34-8/24-6F C33-24 CX34-8/24C-6F C33-24C 6-/2 49 49-/2 257 3-7/8 352 46-7/8 9 CX34-25-6F C33-25 8-/2 470 5-/2 308 6-/4 43 49-/4 25 CX34-25-6F C33-25 8-/2 470 5-/2 308 5-7/8 403 48-7/8 24 CX34-30-6F CX34-30C-6F C33-30 C33-30C 20-/2 52 53-/2 359 7-3/4 45 50-3/4 289 CX34-30-6F C33-30 20-/2 52 53-/2 359 8 457 5 295 CX34-3-6F C33-3 22-/2 572 55-/2 40 2-/4 540 54-/4 378 CX34-3-6F C33-3 22-/2 572 55-/2 40 20-/4 54 53-/4 353 CX34-36-6F C33-36 24-/2 622 57-/2 46 22-/8 562 55-/8 400 CX34-36-6F C33-36 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 CX34-38-6F C33-38 24-/2 622 57-/2 46 22-/4 565 55-/4 403 CX34-38-6F C33-38 24-/2 622 57-/2 46 22 559 55 397 CX34-42-6F C33-42 24-/2 622 57-/2 46 2-7/8 556 54-7/8 394 CX34-43-6F C33-43 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 CX34-44/48-6F C33-48 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 33 (838) HORIZONTL POSITION Model Number in. mm in. mm CH33-8-2F 2-/2 546 54-/2 384 CH33-24/30-2F CH33-36-2F CH33-36-2F CH33-36C-2F CH33-44/48-2F CH33-50/60C-2F CH33-42-2F CH33-48C-2F CH33-60D-2F 26-/2 673 59-/2 5 CH33-62D-2F 3-/2 800 64-/2 638 EL280UH / Page 3

LOWER DT EL280UH070P24 PERFORMNCE (Less Filter) External ir Volume / Watts at Various lower Speeds Static Medium- Medium- Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.0 073 430 863 332 727 267 657 232 0.20 076 45 848 324 76 26 64 227 0.30 060 399 850 35 703 255 634 223 0.40 039 380 825 30 693 247 624 26 0.50 004 357 809 289 680 236 608 208 0.60 95 345 778 270 656 227 589 99 0.70 906 320 749 258 630 23 546 88 0.80 836 298 685 239 584 98 492 7 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH090P36 PERFORMNCE (Less Filter) External ir Volume / Watts at Various lower Speeds Static Medium- Medium- Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.0 760 730 435 576 85 452 970 378 0.20 725 683 420 547 70 440 975 368 0.30 685 656 40 525 70 420 980 356 0.40 630 625 370 50 50 400 955 340 0.50 535 569 35 469 25 39 925 326 0.60 470 533 275 440 085 367 90 309 0.70 365 490 85 407 020 344 840 290 0.80 255 466 05 380 935 34 785 266 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH070P36 PERFORMNCE (Less Filter) External ir Volume / Watts at Various lower Speeds Static Medium- Medium- Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.0 620 658 365 568 5 468 945 374 0.20 580 62 355 535 35 442 960 362 0.30 520 595 335 53 30 423 955 350 0.40 480 562 300 478 00 403 945 335 0.50 400 520 270 450 080 382 925 320 0.60 340 490 205 420 035 358 880 30 0.70 245 458 25 393 975 333 835 282 0.80 60 434 045 364 95 30 775 262 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH090P48 PERFORMNCE (Less Filter) External ir Volume / Watts at Various lower Speeds Static Medium- Medium- Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.0 2030 804 780 79 525 63 280 58 0.20 90 740 740 666 535 580 305 493 0.30 840 698 705 643 500 55 305 474 0.40 770 664 635 594 460 57 280 445 0.50 665 625 560 567 40 483 225 420 0.60 585 595 470 523 330 45 90 39 0.70 470 56 365 483 260 42 5 368 0.80 355 54 230 433 55 392 020 338 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH0P48C PERFORMNCE (Less Filter) External ir Volume / Watts at Various lower Speeds Static Medium- Medium- Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.0 225 99 820 747 555 648 300 540 0.20 2080 862 790 705 540 69 335 56 0.30 205 807 745 652 545 587 335 498 0.40 940 748 695 629 505 552 320 470 0.50 850 76 635 58 470 523 295 449 0.60 775 679 575 560 395 484 235 47 0.70 680 637 470 508 320 450 70 387 0.80 560 592 350 469 205 404 050 345 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH / Page 4

LOWER DT EL280UH0P60C PERFORMNCE (Less Filter) ir Volume / Watts at Different lower Speeds External ottom Return ir, Side Return ir with Optional Return Static ir ase, Return ir from oth Sides or Return ir from Pressure ottom 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. Medium- Medium- Medium- Medium- cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.0 2520 359 2250 034 860 84 455 654 2605 454 260 060 740 848 430 65 0.20 2465 329 2230 08 870 823 480 647 2505 40 250 08 785 838 450 649 0.30 2385 307 280 98 885 809 540 646 2435 349 25 99 795 88 485 638 0.40 2295 256 205 942 865 778 570 638 2350 308 2070 965 805 80 480 63 0.50 2200 24 2055 909 845 762 570 69 2260 274 200 929 785 775 480 62 0.60 230 86 985 882 795 74 550 604 275 228 955 90 755 752 490 6 0.70 205 50 890 848 720 7 505 580 2085 86 850 853 70 722 460 594 0.80 905 05 80 85 675 687 470 565 965 47 785 88 640 689 425 567 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH35P60D PERFORMNCE (Less Filter) ir Volume / Watts at Different lower Speeds External ottom Return ir, Side Return ir with Optional Return Static ir ase, Return ir from oth Sides or Return ir from Pressure ottom 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. Medium- Medium- Medium- Medium- cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.0 2750 44 2220 056 725 825 395 625 2725 463 280 075 75 827 320 624 0.20 2720 392 2235 029 785 80 445 68 2640 400 280 05 720 89 380 626 0.30 2605 362 2220 002 820 800 460 623 2575 374 265 005 790 803 420 622 0.40 2495 32 285 968 845 779 485 66 2495 343 245 988 775 79 450 67 0.50 2420 275 235 939 825 767 505 605 2405 292 205 948 780 777 470 60 0.60 2335 234 2080 909 825 753 495 593 2305 257 2045 94 775 753 480 593 0.70 2220 90 995 864 760 76 475 576 225 24 970 884 740 727 455 583 0.80 220 57 890 835 680 686 435 558 20 70 890 85 675 699 430 565 NOTES - ll air data is measured external to unit without filter (not furnished - field provided) EL280UH / Page 5

REVISIONS Sections pprovals Description of Change Revised to reflect California Nitrogen Oxides Standard 40 ng/j requirement. 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. 205 Lennox Industries, Inc.