SL280DFV. DAVE LENNOX SIGNATURE COLLECTION Downflow - Two-Stage Heat - Variable Speed Blower

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1 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 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 = 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.

2 FEATURES Contents Blower Data H K Dimensions Dimensions - Furnace/Coil Combined Dimensions. 0 Features Gas Heat Accessories I High Altitude Derate J Installation Clearances Model Number Identification L Optional Accessories - Must Be Ordered Extra Optional Accessory Dimensions Specifications 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.

3 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

4 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

5 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

6 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 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane 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 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.7 / / / / 4.9 High static - in. w.g. Heating Connections in. Indoor Blower Electrical Data Cooling Flue connection - in. round 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 Air Volume Range - cfm Voltage 20 volts - 60 hertz - phase Blower motor full load amps Maximum overcurrent protection Shipping Data lbs. - package 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

7 GAS HEAT ACCESSORIES Input High Altitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas Kit ft ft ,000 ft ft ,000 ft ft ,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 Feet Feet 750-0,000 ft. Natural Gas LPG/Propane Natural Gas LPG/Propane Natural Gas LPG/Propane High Low High Low High Low 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

8 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-/ / /4 2 SL280DF090V48B 7-/ / /4 59 SL280DF090V60C SL280DF0V60C / / SL280DFV / Page 8

9 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

10 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/ / /4 400 B M60 9-9/ / /4 476 C M6 23-/ / / (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-/ / / /8 97 CR33-24A-F 7-/ / / /8 97 CR33-24B-F 7-/ / / /8 97 CR33-30/36A-F 7-/ / / /8 248 CR33-30/36B-F 7-/ / / /8 248 CR33-30/36C-F / /8 248 CR33-48B-F / CR33-48C-F CR33-50/60C-F 24-/ / / Coil Width SL280DFV / Page 0

11 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 NORM ADJUST Switch First Stage HEAT - cfm First Stage - cfm NORM 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 Various External Static Pressures - in. wg. Second Stage (Plus) SETTING ( Adjust Jumper at + Setting) Tap Tap Tap Tap NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap Tap Tap Tap (Minus) SETTING ( Adjust Jumper at Setting) Tap Tap Tap Tap SL280DFV / Page

12 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 NORM ADJUST Switch First Stage HEAT - cfm First Stage - cfm NORM 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 Various External Static Pressures - in. wg. Second Stage (Plus) SETTING ( Adjust Jumper at + Setting) Tap Tap Tap Tap NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap Tap Tap Tap (Minus) SETTING ( Adjust Jumper at Setting) Tap Tap Tap Tap SL280DFV / Page 2

13 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 NORM ADJUST Switch First Stage HEAT - cfm First Stage - cfm NORM 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 Various External Static Pressures - in. wg. Second Stage (Plus) SETTING ( Adjust Jumper at + Setting) Tap Tap Tap Tap NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap Tap Tap Tap (Minus) SETTING ( Adjust Jumper at Setting) Tap Tap Tap Tap SL280DFV / Page 3

14 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 NORM ADJUST Switch First Stage HEAT - cfm First Stage - cfm NORM 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 Various External Static Pressures - in. wg. Second Stage (Plus) SETTING ( Adjust Jumper at + Setting) Tap Tap Tap Tap NORM (Normal) SETTING ( Adjust Jumper at NORM Setting) Tap Tap Tap Tap (Minus) SETTING ( Adjust Jumper at Setting) Tap Tap Tap Tap SL280DFV / Page 4

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16 REVISIONS Sections Gas Heat Accessories Description of Change Revised Natural to LPG and LPG to Natural Kits (White-Rodgers valve) Visit us at For the latest technical information, Contact us at 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.