Lennox DAVE SIGNATURE SL297UHNV Installation Instructions Manual

Gas furnace upflow/horizontal air discharge

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Dallas, Texas USA

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Contents

Unit Dimensions - inches (mm) ......................................2

Parts Arrangement..........................................................3

SLP297UHNV Gas Furnace ...........................................4

Shipping and Packing List ..............................................4

Safety .............................................................................4

Use of Furnace as a Construction Heaterl .....................5

General ...........................................................................6

Combustion, Dilution, Ventilation Air...............................6

Setting Equipment ..........................................................6

Filters ............................................................................ 11

Duct System ................................................................. 11

Pipe Fittings Specifications...........................................12

Joint Cementing Procedure ..........................................13

INSTALLATION

INSTRUCTIONS

SL297UHNV

DAVE LENNOX SIGNATURE®

GAS FURNACE UPFLOW / HORIZONTAL

AIR DISCHARGE

507760-04

09/2019

Supersedes 507760-03

A thermostat is not included and must be ordered

separately.

A communicating

communicating applications.

non-communicating

conventional thermostat may be used, as well as other

non-communicating thermostats.

In all cases, setup is critical to ensure proper system

operation.

Field

wiring

for

communicating applications is illustrated in diagrams,

which begin on Page 34.

IMPORTANT

DO NOT use the heat exchanger tubes to lift, drag or

pull the furnace to its installation location.

Doing so will damage the tubes causing noise and or

unsafe operation.

Heatexchanger Tubes

Venting Practices ..........................................................14

Gas Piping ....................................................................29

Electrical .......................................................................32

Integrated Control .........................................................41

Blower Motor Performance ...........................................44

Unit Start-Up .................................................................48

Gas Pressure Measurement.........................................49

Proper Combustion.......................................................50

High Altitude .................................................................50

Repair Parts Lsit ...........................................................50

Sequence of Operation.................................................51

Service..........................................................................53

Program Unit Capacity Size Mode ...............................61

Page 1

NOTICE

thermostat

must

applications,

any

both

communicating

and

used

Lennox

non-

Table of Contents

Summary of Contents for Lennox DAVE LENNOX SIGNATURE SL297UHNV

Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS SL297UHNV © 2019 Lennox Industries Inc. Dallas, Texas USA DAVE LENNOX SIGNATURE® GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE 507760-04 09/2019 Supersedes 507760-03 NOTICE A thermostat is not included and must be ordered separately. A communicating thermostat must used communicating applications.
Page 2: Unit Dimensions - Inches (Mm)
SL297UHNV Unit Dimensions - inches (mm) EXHAUST AIR 3-1/4 NOTE - 60C size units that require air volumes over OUTLET (83) 1800 cfm must have one of the following: 1. Single side return air and Optional Return Air Base 1-7/8 (48) with transition that must accommodate required 20 x 25 x 1 inch (508 x 635 x 25 mm) air filter to maintain proper velocity.
Page 3: Parts Arrangement
Parts Arrangement Exhaust Vent Pipe Burner Assembly Intake Air Assembly Heat Exchanger Rollout Switch Gas Valve Inlet Vent Pipe Exhaust Coupling Gas Pipe Inlet Combustion (right side only) Air Inducer Cabinet Indoor Blower Inner Panel Panel Two-Stage Control FIGURE 1 Page 3...
Page 4: Slp297Uhnv Gas Furnace
DANGER SL297UHNV Gas Furnace The SL297UHNV Category IV gas furnace is shipped Danger of explosion. ready for installation in the upflow or horizontal position. There are circumstances in which odorant used with LP/ The furnace is shipped with the bottom panel in place. The propane gas can lose its scent.
Page 5: Use Of Furnace As A Construction Heaterl
Installed in Combination with a Cooling Coil Use of Furnace as Construction Heater When this furnace is used with cooling coils (figure 3), it Construction heat is not allowed with this furnace. shall be installed in parallel with, or on the upstream side General of, cooling coils to avoid condensation in the heating com- These instructions are intended as a general guide and do...
Page 6: Setting Equipment
Upflow Applications Installation - Setting Equipment The SL297UHNV gas furnace can be installed as shipped WARNING in the upflow position. Refer to figure 6 for clearances. Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas Do not connect the return air duct to the back of the supply connections, electrical supply, vent connection, furnace.
Page 7 Return Air Guidelines WARNING Return air can be brought in through the bottom or either Improper installation of the furnace can result in personal side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make injury or death.
Page 8 Optional Return Air Base CONDENSATE (Upflow Applications Only) TRAP FURNACE FRONT 23 (584) 3−1/4 IF BASE Overall (83) IS USED (Maximum) Minimum WITHOUT 11 (279) IAQ CABINET, Maximum 22−7/16 INDOOR AIR A SINGLE Unit side return air 14 (356) (570) QUALITY RETURN AIR Opening...
Page 9 *GAS CONNECTION INTAKE PIPE a platform, as shown in figure 13. A horizontal suspension EXHAUST PIPE kit (51W10) may be ordered from Lennox or use equiva- lent. *Gas connector may be NOTE - Heavy-gauge sheet metal straps may be used to...
Page 10: Filters
This the data given in the appropriate Lennox Product reverse flow of the flue gas may result in incomplete com- Specifications bulletin. Additional information is provided bustion and the formation of carbon monoxide gas.
Page 11 CAUTION Pipe & Fittings Specifications All pipe, fittings, primer and solvent cement must conform Solvent cements for plastic pipe are flammable liquids with American National Standard Institute and the Ameri- and should be kept away from all sources of ignition. can Society for Testing and Materials (ANSI/ASTM) stan- dards.
Page 12: Joint Cementing Procedure
TABLE 3 OUTDOOR TERMINATION USAGE* STANDARD CONCENTRIC Wall Ring Wall Kit 1-1.2 inch 2 inch 3 inch Flush Mount Kit Vent Pipe 2 inch 3 inch 2 inch Input Size Field 71M80 69M29 Dia. in. 51W11 22G44 44J40 Fabricated (US) (US) 60L46 (US) (US)
Page 13 Conduct the following test while each appliance is oper- Joint Cementing Procedure ating and the other appliances (which are not operating) remain connected to the common venting system. If the venting system has been installed improperly, you must Piping Suspension Guidelines correct the system as indicated in the general venting re- quirements section.
Page 14 2 - Fully insert vent adapter with both bands loosely attached on the furnace exhaust coupling NOTE - Lennox has approved the use of DuraVent® and Centrotherm manufactured vent pipe and terminations 3 - Insert PVC exhaust pipe through vent adapter. Ensure as an option to PVC.
Page 15 In some applications which permit the use of several dif- Which style termination ferent sizes of vent pipe, a combination vent pipe may be being used? used. Contact Lennox’ Application Department for assis- Standard or concentric? tance in sizing vent pipe in these applications. See table 3.
Page 16 TABLE 5 NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. Standard Termination at Elevation 0 - 4500 ft 2” Pipe 3”...
Page 17 TABLE 6 Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using VentilatedAttic or Crawl Space For Intake Air in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size.
Page 18 TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT APPLICATIONS (RIGHT HAND DISCHARGE SHOWN) 12” max. 2” 3” EXHAUST 2” 2” *2” 2” 2” EXHAUST *2” Appliance Adaptor Appliance Adaptor 2” INTAKE INTAKE 2” 2” 45° 45° 2”...
Page 19 TABLE 7 Maximum Allowable Exhaust Vent Pipe Length (in ft.) Without Insulation In Unconditioned Space For Winter Design Temperatures Two - Stage High Efficiency Furnace Winter Design Unit Input Size Vent Pipe Temperatures1 °F Diameter (°C) 32 to 21 2 in (0 to -6) 3 in 20 to 1...
Page 20 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible. Figure 23 Page 20...
Page 21 Details of Intake and Exhaust Piping Terminations for At least one bracket must be used within 6” from the Direct Vent Installations top of the elbow and then every 24” (610mm) as shown in figure 32, to prevent any movement in any direction. NOTE - In Direct Vent installations, combustion air is taken When exhaust and intake piping must be run up an from outdoors and flue gases are discharged to outdoors.
Page 22 8 - A multiple furnace installation may use a group of up FIELD-PROVIDED to four terminations assembled together horizontally, QUIRED TO ADAPT as shown in figure 30. LARGER VENT PIPE SIZE TO TERMINATION. TABLE 8 OUTSIDE INTAKE WALL EXHAUST PIPE TERMINATION SIZE REDUCTION EXHAUST EXHAUST Termination...
Page 23 FIELD FABRICATED WALL TERMINATION NOTE − FIELD−PROVIDED REDUCER MAY BE 2” (51mm) 3” (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION A− Minimum clearance above grade or average 12” (305 mm) 12” (305 mm) snow accumulation B−...
Page 24 Condensate Piping CONDENSATE TRAP AND PLUG LOCATIONS This unit is designed for either right- or left-side exit of (Unit shown in upflow position) condensate piping in upflow applications. In horizontal Trap applications, the condensate trap must extend below the (same on unit.
Page 25 Min. 1” Above Condensate Drain Connection and line. Heating cable kit is available from Lennox in var- ious lengths; 6 ft. (1.8m) - kit no. 26K68; 24 ft. (7.3m) - kit no. 26K69; and 50 ft. (15.2m) - kit no. 26K70.
Page 26 IMPORTANT Furnace with Evaporator Coil Using a Common Drain When combining the furnace and evaporator coil drains together, the A/C condensate drain outlet must Evaporator drain line required be vented to relieve pressure in order for the furnace pressure switch to operate properly. (Trap at coil is optional) Condensate Trap With Optional Overflow Switch (1”...
Page 27 TRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC Optional Condensate Drain Connection Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) 90° Street Elbow 3/4 inch PVC (not furnished) Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) Condensate Drain Connection In Unit 1 (25 mm) Min.
Page 28: Gas Piping
6 - In some localities, codes may require installation of a Gas Piping manual main shut-off valve and union (furnished by Gas supply piping should not allow more than 0.5”W.C. installer) external to the unit. Union must be of the drop in pressure between gas meter and unit.
Page 29 Right Side Piping MANUAL MAIN SHUT-OFF VALVE GROUND JOINT UNION DRIP LEG Gas Valve FIELD PROVIDED AND INSTALLED NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 43 Horizontal Applications Possible Gas Piping Configurations Horizontal Application MANUAL MAIN SHUT-OFF Right-Side Air Discharge...
Page 30 TABLE 9 Gas Pipe Capacity - ft3/hr (m3/hr) Nominal Internal Length of Pipe - feet (m) Iron Pipe Diameter Size Inches inches (3.048) (6.096) (9,144) (12,192) (15.240) (18.288) (21.336) (24.384) (27.432) (30,480) (mm) (mm) .622 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84)
Page 31: Electrical
The power supply wiring must meet Class I restrictions. Electrical Protected by either a fuse or circuit breaker, select circuit protection and wire size according to unit nameplate. WARNING CAUTION Electrostatic discharge can affect electronic components. Take care Failure to use properly sized wiring and circuit breaker during unit installation and service to may result in property damage.
Page 32 For optimal performance in non-communicating applica- When there is a cooling demand, the fan will run on the tions, Lennox recommends use of a conventional high first stage and second stage cooling speed set using the quality electronic digital thermostat or any other with ad- thermostat in the installer setup mode.
Page 33 Communicating Enabled Furnace with Communicating Enabled Furnace with a a Non-Communicating Outdoor Unit Communicating Enabled Outdoor Unit COMMUNICATING FURNACE COMMUNICATING FURNACE OPTIONAL DISCHARGE AIR SENSOR OPTIONAL DISCHARGE AIR SENSOR OPTIONAL OUTDOOR OPTIONAL COMMUNICATING AIR SENSOR OUTDOOR THERMOSTAT AIR SENSOR COMMUNICATING THERMOSTAT DOOR AIR CONDITIONING OR HEAT PUMP UNIT...
Page 34 Optional Accessories for use with any Communicating System NOTE: ICOMMUNICATING THERMOSTAT SENSES HUMIDITY & CONTROLS HUM CONTACTS TO CYCLE HUMIDIFIER BASED 120V CONNECTIONS “HUM” CONTACT IS QUIRED. CLOSED ANYTIME HUMIDITY DEMAND IS PRESENT TIONS. BUILT INTO ALL COMMUNICATING ENABLED OUT DOOR UNITS).
Page 35 TABLE 11 Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 1 Heat / 1 Cool FURNACE OUTDOOR T'STAT TERM.
Page 36 TABLE 11 Continued Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 2 Heat / 2 Cool FURNACE OUTDOOR T'STAT TERM.
Page 37 TABLE 11 Continued Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
Page 38 TABLE 11 Continued Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
Page 39 Figure 48 Page 39...
Page 40: Integrated Control
Integrated Control HS/ CAI LINE 1 NEUTRAL 7 SEGMENT LED FLAME SENSE INDOOR BLOWER DIAGNOSTIC CONNECTOR PUSH BUTTON DIP SWITCHES 12 PIN LOW OUTDOOR AIR VOLTAGE SENSOR CONNECTOR TERMINALS DISCHARGE AIR W915 Y1 TO Y2 SENSOR 2 STAGE COMPR TERMINALS W951 R TO O HEAT PUMP TB83...
Page 41 TABLE 12 Integrated Control Switch Settings Conventional Thermostat (non-communicating) Blower Off Delay Switch Settings Blower Off Delay Switch 3 Switch 4 SL297UHNV units are equipped with a two-stage, vari- Seconds able speed integrated control. This control manages igni- tion timing, heating mode fan off delays and indoor blower 90 (factory) speeds based on selections made using the control dip switches and jumpers.
Page 42 NOTE - The off portion of the selected ramp profile also Ramping Option D applies during heat pump operation in dual fuel applica- • Motor runs at 100% until demand is satisfied. tions. • Once demand is met, motor ramps down to stop. TABLE 15 Cooling Mode Blower Speed Ramping Ramping...
Page 43 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 selectable at 28% and 38% of the selected second stage cooling speed - minimum 250 cfm. Lennox iHarmony Zoning System Applications - Minimum blower speed is 250 cfm.
Page 44 Continuous Fan Only speed is selectable at 28% and 38% of the selected second stage cooling speed - 080NV48C minimum 380 cfm. 080NV060C minimum 450 cfm. Lennox iHarmony Zoning System Applications - 080NV48C minimum blower speed is 380 cfm, 080NV060C 450 cfm.
Page 45 (R to DS) on SureLight® control With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight® control Dave Lennox ComfortSense® 7000 thermostat to use for this application - Y2081 4 heat / 2 cool *Dehumidification blower speed is 70% of COOL speed for all units .
Page 46 With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight® control Dave Lennox ComfortSense® 7000 thermostat to use for this application - Y2081 4 heat / 2 cool *Normal operation first stage cooling blower speed is 70% COOL speed.
Page 47: Unit Start-Up
WARNING Unit Start-Up FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal WARNING injury or death. Do not use this furnace if any part has been underwater. Gas Valve Operation (Figure 50) A flood-damaged furnace is extremely dangerous.
Page 48 Failure To Operate Furnace should operate at least 5 minutes before check- ing gas flow. Determine time in seconds for two revolu- If the unit fails to operate, check the following: tions of gas through the meter. (Two revolutions assures a 1 - Is the thermostat calling for heat? more accurate time.) Divide by two and compare to time in table 20.
Page 49: Proper Combustion
100ppm. Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate -- Example: SL297UH040NV36B-01. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier.
Page 50: Sequence Of Operation
switch is factory-set in the “TWO-STAGE” positiwon. Other Unit Adjustments Applications Using Two-Stage Thermostat See figure 51 for ignition control sequence NOTE - See troubleshooting flow charts if any safety A - Heating Sequence -- Integrated Control Thermostat switches are found to be open. Selection DIP Switch 1 OFF in “Two-Stage”...
Page 51 Applications Using A Single-Stage Thermostat 4 - After the 20-second warm-up period has ended, the See figure 52 for ignition control sequence gas valve is energized on low fire (first stage) and ignition occurs. At the same time, the control module B - Heating Sequence -- Integrated Control Thermostat sends a signal to begin an indoor blower 30-second Selection DIP Switch 1 ON in “Single-Stage”...
Page 52: Service
At the beginning of each heating season, and to comply off operation. with the Lennox Limited Warranty, your system should be 1 - Check the operation of the ignition system, inspect checked as follows: and clean flame sensor.
Page 53: Program Unit Capacity Size Mode
Integrated Control Diagnostic Modes Display Action (when button is released) No change (idle)* Remain in idle mode Solid “E” Enter diagnostic recall mode Solid “D” Discharge Air Installed Solid “F” Enter flame signal mode Solid “P” (variable speed only) Program unit capacity size (Unit Code) Two horizontal lines Soft disable * No change implies the display will continue to show whatever is currently being displayed for normal operation (blinking...
Page 54 Integrated Control Diagnostic Codes Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF). Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed.
Page 55 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E124 Active communicating thermostat signal Equipment lost communication with the thermostat. Check missing for more than 3 minutes. four wiring connections, ohm wires and cycle power at the thermostat.
Page 56 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E206 Gas valve second-stage relay failure Furnace will operate on 1st stage for remainder of the heating demand. Will clear after fault recovered. If un- able to operate 2nd stage, replace control.
Page 57 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E271 Soft lockout - Exceeded maximum number of re- Check pressure (inches w.c.) of low pressure switch clos- tries. Last retry failed due to the pressure switch ing on heat call.
Page 58 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E312 Restricted air flow in cooling or continu- Warning Only. Restricted airflow - Indoor blower is running at a re- ous fan mode is lower than cfm setting. duced CFM (Cutback Mode - The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating outside of design parameters (0 to 0.8”...
Page 59 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E406 LSOM - Compressor open start circuit. Required amount of current is not passing through Start cur- rent transformer. Clears the error after current is sensed in START sensor, or after power reset.
Page 60 Program Unit Capacity/Size Mode Power-Up - Number displayed represents by integrated control unit size code (furnace model − − and capacity). If three horizontal bars are displayed followed by continuous E203, furnace − control does not recognize unit size code. Configure per the following: Furnace control in IDLE mode No heating, cooling or indoor fan operation)
Page 61 Troubleshooting: Heating Sequence of Operation CALL FOR FIRST-STAGE HEAT CALL FOR 1ST STAGE HEAT (LOW FIRE) INDOOR BLOWER OFF AFTER HEAT FAN OFF DELAY (LOW HEAT SPEED) INDOOR LIMIT BLOWER OFF HIGH ERROR INDOOR SWITCH WATCHGUARD − AFTER HEAT FAN LIMIT SWITCH CODE BLOWER...
Page 62 Troubleshooting: Heating Sequence of Operation (Continued) CALL FOR SECOND-STAGE HEAT CALL FOR 2ND STAGE HEAT (HIGH FIRE) SINGLE STAGE 2 STAGE THERMOSTAT THERMOSTAT 2ND STAGE RECOGNITION DELAY ON DELAY (30 SECONDS) EXPIRED? EXPIRED? ONLY FOR 1ST REQUEST FOR 2ND STAGE HEAT INDUCER SWITCHED TO HIGH SPEED HIGH...
Page 63 Troubleshooting: Heating Sequence of Operation (Continued) CALL FOR SECOND-STAGE HEAT CALL FOR 2ND STAGE HEAT (HIGH FIRE) SINGLE STAGE 2 STAGE THERMOSTAT THERMOSTAT 2ND STAGE RECOGNITION DELAY ON DELAY (30 SECONDS) EXPIRED? EXPIRED? ONLY FOR 1ST REQUEST FOR 2ND STAGE HEAT INDUCER SWITCHED TO HIGH SPEED HIGH...
Page 64 Troubleshooting: Cooling Sequence of Operation CALL FOR COOLING 1ST STAGE COOLING REQUEST RECEIVED WAIT FOR COMPRESSOR TIMED OFF DELAY TO EXPIRE ENERGIZE 1ST STAGE COOLING CONTACTOR (COMPRESSOR & FAN) INDOOR BLOWER 2 SECOND ON DELAY ENERGIZE INDOOR BLOWER (LOW COOLING MODE) MAINTAIN INDOOR BLOWER (LOW COOLING MODE)
Page 65 Troubleshooting: Continuous Fan Sequence of Operation CALL FOR FAN CALL FOR FAN INDOOR BLOWER ON CONTINUOUS FAN SPEED MAINTAIN INDOOR CALL FOR FAN BLOWER AT REMOVED? CONTINUOUS FAN REQUEST MAINTAIN INDOOR FOR COOLING GO TO CALL FOR COOLING BLOWER AT RECEIVED? CONTINUOUS FAN REQUEST...
Page 66 TABLE 23 Allowable Heating Speeds SL297UH -18% -12% Default +12% +18% +24% Model 040NV36B Allowed 060NV36B Allowed Allowed Allowed Factory Setting Allowed Allowed Allowed 080NV48C Not Allowed 080NV60C Allowed TABLE 24 Allowable Circulation Speeds SL297UHN Model (second stage cool (second stage cool) All Models Allowed Factory Setting...

Lennox DAVE SIGNATURE SL297UHNV Installation Instructions Manual

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