P R O D U C T S P E C I F I C AT I O N S G A S F U R N A C E S SL280DFV DAVE LENNOX SIGNATURE COLLECTION Downflow - Two-Stage Heat - Variable Blower Bulletin No. 20576 December 200 Supersedes July 200 AFUE - 80% Input - 66,000 to 0,000 Btuh Nominal Add-on Cooling - 2 to 5 Tons MODEL NUMBER IDENTIFICATION SL 2 80 DF 070 X V 36 A Unit Type SL = Dave Lennox Signature Collection Stages 2 = Two-Stage AFUE 80 = 80% Configuration DF = Downflow Nominal Gas Heat Input 070 = 66,000 Btuh 090 = 88,000 Btuh 0 = 0,000 Btuh Cabinet Width A = 4-/2 in. B = 7-/2 in. C = 2 in. Nominal Add-On Cooling Capacity 36 = 2-3 tons 48 = 3-4 tons 60 = 3.5-5 tons Blower V = Variable Blower Motor Low NO x = Units meet California Nitrogen Oxides standards Indoor coils with the same letter designation will physically match the furnace.
FEATURES Contents Blower Data...................... H K Dimensions....................... 8 Dimensions - Furnace/Coil Combined Dimensions. 0 Features........................ 2 Gas Heat Accessories................. 7 I High Altitude Derate.................. 7 J Installation Clearances................. 7 Model Number Identification.............. L Optional Accessories - Must Be Ordered Extra.... 6 Optional Accessory Dimensions............ 9 Specifications..................... 6 B F G M C E D NOTE - SL280DFV FURNACES ARE NOT AVAILABLE IN CANADA! WARRANTY Duralok Aluminized Steel Heat Exchanger - Limited twenty year warranty in residential applications, ten years in non-residential applications. All other covered components - Limited ten year warranty in residential applications, one year in nonresidential applications. Refer to Lennox Equipment Limited Warranty certificate included with equipment for details. APPROVALS Units are certified by AHRI. APPLICATIONS Input capacities of 66,000, 88,000 and 0,000 Btuh. Energy efficiency (AFUE) of 80%. Compact cabinet for utility room, alcove or closet 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. Units tested and rated according to US DOE test procedures and FTC labeling regulations. Zoning Applications ISO 900 Registered Manufacturing Quality System. Zone control panel must be able to interface and communicate with the variable speed blower motor in the unit. The Harmony III Zoning System has this capability. Blower data from unit tests conducted in Lennox Laboratory air test chamber. SL280DFV / Page 2 Units may be used with certain zoning systems.
B C D E F FEATURES HEATING SYSTEM SilentComfort Technology Patent pending burner sound enclosure and extra cabinet insulation reduces operating sound levels. Lennox Duralok Heat Exchanger Assembly 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 Burners Aluminized 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. 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- Combustion Air 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. G H I Flame Rollout Switch Manual reset switch is factory installed on burner box. Switch provides protection from abnormal operating conditions. Limit Controls Automatic 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. OPTIONS High Altitude 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. BLOWER Variable Direct Drive Blower Each blower assembly statically and dynamically balanced. Change in blower speed is easily accomplished by simple DIP switch change on the furnace control. See Blower Performance tables. Blower assembly easily removed for servicing. Variable Blower Motor Variable speed motor maintains specified air volume from 0 though 0.8 in. w.g. (heating) and 0 through.0 in. w.g. (Cooling) static range. Variable speed operation is achieved by the use of an ECM (Electronically Commutated Motor) motor. Motor is controlled by furnace control. Motor is resiliently mounted. When furnaces are used with the Harmony III Zoning System, blower motor operates from predetermined minimum - maximum air volumes to satisfy zone requirements. SL280DFV / Page 3
FEATURES J CONTROLS SureLight Integrated Two-Stage / Variable Blower Furnace Control Contains all necessary controls and relays to operate furnace. Combustion air inducer is controlled by control. Prior to ignition, a low speed pre-purge cycle for 5 seconds is initiated. After the main burners are turned off, a postpurge cycle for 5 seconds is run. Ignition control provides a regulated 95 volts to the ignitor for a consistent ignition and long ignitor life. Flame sensor utilizes flame rectification for safe and reliable operation. Should flame fail to ignite, flame 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 second stage recognition times (0 and 5 minutes) are available when the furnace is used with a single stage thermostat. When used with a twostage thermostat, furnace will only initiate second stage operation with a second stage thermostat demand. Four LED s indicate unit status and aid in troubleshooting:. SPEED LED (green) - Indicates circulating blower speed. The LED is lit during normal blower operation and is off during a dehumidification demand. In Harmony III zoning applications, the brightness of the LED indicates the requested blower speed. 2. CFM LED (green) - Indicates blower cfm. 3. STATUS LED (red) - Flashes diagnostic codes. 4. E-COM LED (green) - Indicates that the control is receiving and processing commands and inputs. Two accessory terminals furnished for additional power supply requirements for 20 volt (less than amp) power humidifiers and powered air cleaners. One 24 volt humidifier output furnished for non-powered humidifiers. Two blower speeds - second stage heat and second stage cool (with four air volume selections for each) are selected by DIP switches on control. Heat speed can be adjusted to optimize discharge temperature. Cool speed can be adjusted to correct optional cooling capacity. See Blower Performance tables. First stage blower speed is a percentage of second stage speed. The ADJUST switch (DIP) allows normal (NORM), 0% higher (+ plus) or 0% lower ( minus) motor speed selection within HEAT and COOL speeds selected for fine tuning air volume. DELAY switch (DIP) allows one of four de-humidification profiles during cooling mode: Profile A - Motor runs at 50% for 30 seconds, then at 82% for 7-/2 minutes, then at 00% (if needed) until demand is satisfied. Once demand is met, motor runs at 50% for 30 seconds, then ramps down to stop. Profile B - Motor runs at 82% for 7-/2 minutes and then at 00% (if needed) until demand is satisfied. Once demand is met,motor ramps down to stop. Profile C - Motor runs at 00% until demand is satisfied. Once demand is met, motor runs at 00% for 60 seconds, then ramps down to stop. Profile D - Motor runs at 00% until demand is satisfied. Once demand is met, motor ramps down to stop. In heat mode, blower on time is fixed at 45 seconds, blower off time is adjustable from 60, 90, 20 and 80 seconds (factory setting - 90 seconds). For air-conditioning applications, blower on time is 2 seconds following thermostat demand for cooling. Controls humidity by controlling blower and compressor speed on two-stage outdoor units when used with humidity control or ComfortSense 7000 Touchscreen Thermostat. 24 Volt Transformer Furnished and factory installed in control box. 40VA transformer has circuit breaker wired in series. Note - 50VA transformer is required when unit is used with the Harmony III Zoning System. Ordered separately. See Price Book. Field Wiring Make-up Box Furnished for line voltage wiring. Factory installed internally on left side of furnace. Box may be installed on right side of furnace. SL280DFV / Page 4
FEATURES CONTROLS (CONTINUED) OPTIONS ComfortSense 7000 Touchscreen Thermostat Electronic 7-day, universal, multi-stage, programmable, touchscreen thermostat. 4 Heat/2 Cool. Auto-changeover. Controls humidity during cooling mode. Offers enhanced capabilities including humidification / dehumidification / dewpoint measurement and control, Humiditrol control, and equipment maintenance reminders. Easy-to-use, menu driven thermostat with a back-lit, LCD touchscreen. Remote outdoor temperature sensor (optional) allows the thermostat to display outdoor temperature. Required in dual-fuel and Humiditrol applications. See the ComfortSense 7000 Product Specifications bulletin in the Controls section for more information. Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat bulletins in Controls Section and Lennox Price Book for selection. OPTIONS Night Service Kit Contains most commonly used service parts: Furnace Control Ignitor Flame sensor Gas valve Transformer Safety Night Service Kit Kit contains: Primary limits (for each model) Pressure switches (for each model) Flame rollout switches (for each model) Secondary limits (for each model) MODE SCHED HOME SCHEDULE OPTIONS AUTO ON INDOOR RH 26% WED AN 2 2:35AM SET AT HEAT SET AT COOL K L M CABINET Low-profile, narrow width cabinet allows easy installation in downflow applications. Heavy-gauge, cold rolled steel construction. Pre-painted cabinet finish. Flanges provided on return air opening for ease of plenum connection. 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. Coil Match-up All furnaces exactly match CR33 cased, downflow indoor coils with adaptor rails, furnished with coil. OPTIONS Downflow Combustible Flooring Base Required for heating only units installed on combustible flooring. Not required in add-on cooling applications. See Dimension drawing. FILTER (NOT FURNISHED) Filter and provisions for external mounting must be field provided. OPTIONS Downflow Filter Kit Filter cabinet mounts directly on top of furnace. A width cabinet includes one filter. B and C width cabinets include two filters. Filter rails are furnished. Front access for servicing. Cleanable filter(s) are furnished. SL280DFV / Page 5
SPECIFICATIONS Gas Heating Performance High Low Model No. SL280DF070V36A SL280DF090V48B SL280DF090V60C SL280DF0V60C AFUE 80% 80% 80% 80% Input - Btuh 66,000 88,000 88,000 0,000 Output - Btuh 52,000 69,000 70,000 87,000 Temperature rise range - F 35-65 35-65 35-65 35-65 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 3.5 / 0.0 Input - Btuh 43,000 57,000 57,000 72,000 Output - Btuh 35,000 46,000 46,000 59,000 Temperature rise range - F 25-55 25-55 25-55 25-55 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.7 / 4.9.7 / 4.9.7 / 4.9.7 / 4.9 High static - in. w.g. Heating 0.8 0.8 0.8 0.8 Connections in. Indoor Blower Electrical Data Cooling.0.0.0.0 Flue connection - in. round 4 4 4 4 Gas pipe size IPS /2 /2 /2 /2 Wheel nominal diameter x width - in. 0 x 8 x 9 x 0 x 0 Motor output - hp /2 Tons of add-on cooling 2-3 3-4 3.5-5 3.5-5 Air Volume Range - cfm 589-54 830-996 899-2273 882-220 Voltage 20 volts - 60 hertz - phase Blower motor full load amps 7.7 2.8 2.8 2.8 Maximum overcurrent protection 5 20 20 20 Shipping Data lbs. - package 30 53 64 73 NOTE - Filters and provisions for mounting are not furnished and must be field provided. Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA CABINET ACCESSORIES A Width Models B Width Models C Width Models Downflow Combustible Flooring Base M59 M60 M6 CONTROLS ComfortSense 7000 Thermostat Y0349 Y0349 Y0349 Remote Outdoor Sensor (for dual fuel and Humiidtrol ) X2658 X2658 X2658 DOWNFLOW FILTER KITS Downflow Filter Kit 5W06 5W07 5W08 NIGHT SERVICE KITS No. and Size of filter - in. () 20 x 6 x (2) 20 x 20 x (2) 20 x 20 x Night Service Kit 5W04 5W04 5W04 Safety Night Service Kit 5W05 5W05 5W05 SL280DFV / Page 6
GAS HEAT ACCESSORIES Input High Altitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas 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. 070 No Change No Change 73W36 77W07 77W05 77W09 77W 090 No Change No Change 73W36 77W07 77W05 77W09 77W 0 No Change No Change 73W35 77W07 77W05 77W09 77W HIGH ALTITUDE DERATE NOTE - Units may be installed at altitudes up to 4500 ft. above sea level without any modifications. At 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 High Low High Low High Low 070 3.5.7 0 4.9 3.4.6 0 4.9 3.5.7 0 4.9 090 3.5.7 0 4.9 3.0.5 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 Natural Gas High Alitude Orifice Kit required. High Low High Low High Low INSTALLATION CLEARANCES - INCHES (MM) Vent Type Type B Type C Sides 0 inches (0 mm) 0 inches (0 mm) Rear 0 inches (0 mm) 0 inches (0 mm) Top inch (25 mm) inch (25 mm) Front 2-/4 inches (57 mm) 2-/4 inches (57 mm) Front (alcove) 24 inches (60 mm) 24 inches (60 mm) Front (service) 24 inches (60 mm) 24 inches (60 mm) Floor 2 Combustible 2 Combustible Flue inch (25 mm) 6 inches (52 mm) NOTE - Air for combustion must conform to the methods outlined in the National Fuel Gas Code (NFPA 54/ANSI-Z223.). NOTE - In the U.S. flue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFPA 54/ ANSI-Z223.) or applicable provisions of local building codes. Left side requires 4 in. clearance if single wall vent is used on 4-/2 in. A width cabinets, and 2 in. clearance on 7-/2 in. B width cabinets. 2 Clearance for installation on combustible floor if optional Downflow Combustible Flooring Base is installed between furnace and combustible floor. Not required in add-on cooling applications if installed in accordance with local codes or National Fuel Gas Code ANSI-Z223.. SL280DFV / Page 7
DIMENSIONS - INCHES (MM) 3-/8 (79) 9/6 (4) D FLUE OUTLET (Top) B RETURN AIR OPENING 9-7/6 (494) 9/6 (4) 9/6 (4) TOP VIEW A B 9/6 (4) -/2 (38) Front Panel 27-3/4 (705) 9-7/6 (494) 9/6 (4) AIR FLOW 33 (838) 5-3/8 (37) Right 2-/8 (54) Left ELECTRICAL INLET (Either Side) GAS PIPING INLET (Either Side) 6-5/8 (68) Right 7-/8 (8) Left 3/4 (9) C Supply Air 3/4 (9) 9-/4 (489) Supply Air 3/4 (9) FRONT VIEW SIDE VIEW Model No. A B C D in. mm in. mm in. mm in. mm SL280DF070V36A 4-/2 368 3-3/8 340 3 330 4-3/4 2 SL280DF090V48B 7-/2 446 6-3/8 46 6 406 6-/4 59 SL280DF090V60C SL280DF0V60C 2 533 9-7/8 504 9-/2 495 8 203 SL280DFV / Page 8
OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) DOWNFLOW FILTER CABINET A WIDTH FURNACES (Single Filter) B AND C WIDTH FURNACES (Two Filters) 20-/2 (52) 4-/2 (368) 20-/2 (52) 7-/2 (445) B Box 2 (533) C Box FILTER () 2 (533) FILTERS (2) 7-/2 (445) 54 (372) 50-/2 (283 ) 33 (838) 33 (838) FILTER ACCESS DOOR FURNACE FURNACE FILTER ACCESS DOOR NOTE: Return Air Opening (W x D) A Box 3-/2 x 9-5/8 (343 x 498) B Box 6-/2 x 9-5/8 (49 x 498) C Box 20 x 9-5/8 (508 x 498) SL280DFV / Page 9
OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) DOWNFLOW COMBUSTIBLE FLOORING BASE -/2 (38) SUPPLY AIR OPENING DOWN FLOW FURNACE -/2 (38) B 9-3/6 (503) -/2 (38) 27-/4 (692) 2-3/6 (554) Front Of Furnace A -/2 (38) TOP VIEW SIDE VIEW DOWNFLOW COMBUSTIBLE FLOORING BASE FLOOR OPENING Cabinet Width Catalog Number A B C in. mm in. mm in. mm A M59 6-9/6 42 3-9/6 344 5-3/4 400 B M60 9-9/6 497 6-9/6 42 8-3/4 476 C M6 23-/6 586 20-/6 50 22-/4 565 22 (559) C DIMENSIONS - INCHES (MM) - FURNACE/COIL COMBINED DIMENSIONS Furnace Width 33 (838) Coil Height Overall Height Model Number Coil Width Furnace Width Coil Height Overall Height in. mm in. mm in. mm in. mm CR33-8A-F 7-/2 446 4-/2 368 4-/8 359 47-/8 97 CR33-24A-F 7-/2 446 4-/2 368 4-/8 359 47-/8 97 CR33-24B-F 7-/2 446 7-/2 446 4-/8 359 47-/8 97 CR33-30/36A-F 7-/2 446 4-/2 368 6-/8 40 49-/8 248 CR33-30/36B-F 7-/2 446 7-/2 446 6-/8 40 49-/8 248 CR33-30/36C-F 2 533 2 533 6-/8 40 49-/8 248 CR33-48B-F 2 533 7-/2 446 20 508 53 346 CR33-48C-F 2 533 2 533 20 508 53 346 CR33-50/60C-F 24-/2 622 2 533 23-5/8 600 56-5/8 2276 Coil Width SL280DFV / Page 0
BLOWER DATA SL280DF070V36A BLOWER PERFORMANCE (less filter) 0 through 0.8 in. w.g. (Heating) and 0 through.0 in. w.g. (Cooling) External Static Pressure Range ADJUST Switch Second Stage HEAT - cfm Switch Second Stage - cfm 2 3 4 2 3 4 + 007 036 92 24 05 00 240 425 NORM 95 942 084 28 920 00 5 300 824 848 976 05 800 900 020 65 ADJUST Switch First Stage HEAT - cfm First Stage - cfm 2 3 4 2 3 4 + 89 944 09 30 665 755 870 00 NORM 80 858 008 027 65 680 775 920 729 772 907 924 535 65 690 80 Factory default jumper setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 9% of the same second stage HEAT speed position. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position - minimum 500 cfm. Lennox Harmony III Zoning System - Minimum blower speed is 426 cfm. SL28DF070V36A BLOWER MOTOR WATTS (COOLING) Jumper Posiitons First Stage Motor Watts @ Various External Static Pressures - in. wg. Second Stage 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9.0 + (Plus) SETTING ( Adjust Jumper at + Setting) Tap 44 62 74 88 03 7 32 48 64 9 44 66 89 22 23 242 265 278 298 323 Tap 2 46 63 83 96 5 28 44 70 8 38 62 77 22 229 247 270 288 320 342 363 Tap 3 66 8 04 27 44 60 75 95 29 85 20 238 266 293 37 349 374 399 432 448 Tap 4 00 23 38 67 9 2 234 255 27 299 328 354 380 42 434 477 499 528 557 570 NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap 34 53 64 77 90 05 8 29 42 89 34 53 78 94 208 229 247 263 273 Tap 2 38 57 64 85 98 07 33 47 58 04 25 44 66 92 22 230 26 267 295 35 Tap 3 49 72 87 96 22 35 60 76 97 4 67 84 26 237 256 288 304 326 356 383 Tap 4 70 90 09 32 58 72 20 222 23 28 245 276 306 323 357 374 403 444 472 489 (Minus) SETTING ( Adjust Jumper at Setting) Tap 3 44 56 67 80 92 00 20 69 86 05 22 40 54 76 94 209 220 242 Tap 2 33 45 60 73 89 04 4 23 44 73 89 24 55 75 96 20 224 243 263 Tap 3 40 54 74 86 06 5 34 42 70 08 8 53 70 96 29 227 253 266 286 36 Tap 4 52 74 85 07 28 49 6 8 20 56 8 208 222 253 284 305 333 356 374 398 SL280DFV / Page
BLOWER DATA SL280DF090V48B BLOWER PERFORMANCE (less filter) 0 through 0.8 in. w.g. (Heating) and 0 through.0 in. w.g. (Cooling) External Static Pressure Range ADJUST Switch Second Stage HEAT - cfm Switch Second Stage - cfm 2 3 4 2 3 4 + 384 440 724 925 930 285 525 745 NORM 258 309 567 750 855 60 40 605 32 78 40 575 790 085 245 445 ADJUST Switch First Stage HEAT - cfm First Stage - cfm 2 3 4 2 3 4 + 25 324 593 767 740 930 090 200 NORM 37 204 448 606 70 880 000 35 023 084 303 445 665 845 930 025 Factory default jumper setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 9% of the same second stage HEAT speed position. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position - minimum 500 cfm. Lennox Harmony III Zoning System - Minimum blower speed is 426 cfm. SL280DF090V48B BLOWER MOTOR WATTS (COOLING) Jumper First Stage Motor Watts @ Various External Static Pressures - in. wg. Second Stage 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9.0 + (Plus) SETTING ( Adjust Jumper at + Setting) Tap 45 67 86 97 7 4 63 80 98 76 05 23 46 70 89 20 245 26 288 39 Tap 2 76 04 26 47 7 94 223 249 273 73 97 240 265 299 323 357 39 420 449 478 Tap 3 0 38 62 90 22 243 265 293 322 288 308 363 395 440 46 497 527 560 598 634 Tap 4 54 88 23 24 269 303 334 364 395 430 470 56 552 603 633 677 7 756 788 82 NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap 39 60 73 96 8 34 54 70 9 60 82 0 32 50 73 99 28 248 27 292 Tap 2 66 89 3 34 55 79 93 223 252 32 62 85 223 249 273 296 338 359 392 47 Tap 3 9 7 39 69 90 2 243 263 292 222 244 289 326 352 389 420 448 478 50 546 Tap 4 24 54 76 20 232 262 29 3 352 34 344 38 443 487 57 546 585 623 658 74 (Minus) SETTING ( Adjust Jumper at Setting) Tap 35 59 70 88 03 30 45 68 83 52 76 96 7 34 53 78 95 22 243 269 Tap 2 55 79 97 8 43 65 80 207 23 00 3 54 79 205 23 253 280 306 337 374 Tap 3 76 05 22 44 65 87 25 246 264 59 92 26 250 276 309 336 369 400 430 458 Tap 4 03 27 52 78 20 230 250 278 300 245 279 30 342 382 407 442 473 496 546 577 SL280DFV / Page 2
BLOWER DATA SL280DF090V60C BLOWER PERFORMANCE (less filter) 0 through 0.8 in. w.g. (Heating) and 0 through.0 in. w.g. (Cooling) External Static Pressure Range ADJUST Switch Second Stage HEAT - cfm Switch Second Stage - cfm 2 3 4 2 3 4 + 329 440 579 745 580 770 2000 2270 NORM 208 309 435 586 420 605 840 2045 087 78 292 427 305 390 640 875 ADJUST Switch First Stage HEAT - cfm First Stage - cfm 2 3 4 2 3 4 + 28 367 47 598 0 260 40 600 NORM 07 243 337 453 020 0 305 440 996 9 203 308 925 00 30 290 Factory default jumper setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 9% of the same second stage HEAT speed position. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position - minimum 500 cfm. Lennox Harmony III Zoning System - Minimum blower speed is 426 cfm. SL280DF090V60C BLOWER MOTOR WATTS (COOLING) Jumper First Stage Motor Watts @ Various External Static Pressures - in. wg. Second Stage 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9.0 + (Plus) SETTING ( Adjust Jumper at + Setting) Tap 8 09 35 54 90 25 243 269 29 97 229 269 34 35 403 424 465 503 542 572 Tap 2 7 42 75 204 227 252 285 308 340 299 329 388 432 466 495 549 586 645 669 705 Tap 3 43 83 208 247 283 32 352 385 423 45 50 52 587 633 664 705 765 794 848 879 Tap 4 209 246 29 329 370 402 447 490 525 689 720 783 826 890 938 995 032 072 04 3 NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap 63 92 4 39 62 86 26 242 270 44 83 27 248 286 307 354 386 42 459 498 Tap 2 82 4 59 95 223 247 274 308 2 245 294 33 369 40 445 486 523 559 604 Tap 3 2 48 8 2 24 279 304 33 356 33 366 4 468 497 546 588 629 664 707 748 Tap 4 55 94 26 260 296 334 363 393 434 48 535 574 604 655 74 762 86 85 877 942 (Minus) SETTING ( Adjust Jumper at Setting) Tap 53 76 0 2 39 66 84 209 238 7 49 80 203 235 269 294 327 349 387 42 Tap 2 68 94 20 37 66 93 29 239 266 54 87 29 258 29 39 365 386 424 458 492 Tap 3 88 7 44 69 204 227 25 282 33 225 254 298 355 382 427 459 503 542 580 604 Tap 4 24 56 83 208 239 267 304 326 359 362 395 436 484 520 568 64 643 686 72 746 SL280DFV / Page 3
BLOWER DATA SL280DF0V60C BLOWER PERFORMANCE (less filter) 0 through 0.8 in. w.g. (Heating) and 0 through.0 in. w.g. (Cooling) External Static Pressure Range ADJUST Switch Second Stage HEAT - cfm Switch Second Stage - cfm 2 3 4 2 3 4 + 497 607 90 204 500 755 90 220 NORM 36 46 728 855 360 585 765 955 225 35 555 670 225 400 595 760 ADJUST Switch First Stage HEAT - cfm First Stage - cfm 2 3 4 2 3 4 + 38 460 737 905 055 230 365 525 NORM 255 327 579 732 975 5 250 400 30 94 42 559 895 005 30 245 Factory default jumper setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 9% of the same second stage HEAT speed position. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position - minimum 500 cfm. Lennox Harmony III Zoning System - Minimum blower speed is 426 cfm. SL280DF0V60C BLOWER MOTOR WATTS (COOLING) Jumper First Stage Motor Watts @ Various External Static Pressures - in. wg. Second Stage 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0. 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9.0 + (Plus) SETTING ( Adjust Jumper at + Setting) Tap 78 0 28 44 72 200 28 244 264 72 96 243 284 32 360 39 428 452 494 528 Tap 2 08 35 62 92 23 24 269 295 324 268 294 352 376 424 466 505 554 58 604 645 Tap 3 46 80 203 238 27 305 334 358 396 373 424 459 504 529 575 64 680 72 747 80 Tap 4 8 29 254 29 327 365 40 436 479 50 557 596 660 725 763 85 869 922 962 993 NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap 62 87 08 25 48 73 96 222 239 35 65 94 23 267 305 320 346 38 422 457 Tap 2 87 5 35 58 89 28 236 264 285 95 226 270 3 347 377 42 455 494 530 562 Tap 3 4 40 73 20 224 250 283 32 339 290 335 358 40 450 497 528 565 6 640 677 Tap 4 48 86 207 246 282 307 354 375 40 395 438 484 525 559 608 659 7 745 776 826 (Minus) SETTING ( Adjust Jumper at Setting) Tap 47 67 94 08 28 40 72 93 22 06 34 6 9 24 238 259 295 322 349 379 Tap 2 67 9 4 34 5 80 206 226 247 47 8 20 245 280 32 347 376 404 445 476 Tap 3 94 6 4 67 98 20 242 259 288 207 236 284 320 356 39 42 473 494 535 573 Tap 4 8 46 76 202 222 248 285 33 337 280 35 356 398 444 478 520 559 607 627 669 SL280DFV / Page 4
REVISIONS Sections Gas Heat Accessories Description of Change Revised Natural to LPG and LPG to Natural Kits (White-Rodgers valve) 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. 200 Lennox Industries, Inc.