Lennox SLP98DFV Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Lennox Manuals
  4. Furnace
  5. SLP98DFV SERIES
  6. Installation instructions manual

Lennox SLP98DFV Installation Instructions Manual

Gas furnace downflow air discharge
Hide thumbs Also See for SLP98DFV:
Table of Contents

Advertisement

Quick Links

See also: User's Information Manual , Instruction and Installation Manual
E 2011 Lennox Industries Inc.
Dallas, Texas, USA
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02/11
*2P0211*
DOWNFLOW
AIR FLOW

Table of Contents

. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
INSTALLATION
INSTRUCTIONS
SLP98DFV
DAVE LENNOX SIGNATURE
COLLECTION GAS FURNACE
DOWNFLOW AIR DISCHARGE
506611−01
02/2011
Supersedes 10/2010
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
This is a safety alert symbol and should never be ignored.
When you see this symbol on labels or in manuals, be alert
to the potential for personal injury or death.
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
A thermostat is not included and must be ordered
separately.
D The Lennox icomfort Toucht thermostat must be
used in communicating applications.
D In non−communicating applications, the Lennox
ComfortSense
well as other non−communicating thermostats.
In all cases, setup is critical to ensure proper sys-
tem operation.
Field wiring for both communicating and non−com-
municating applications is illustrated in diagrams,
which begin on Page 30.
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
5
6
6
9
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
11
12
12
23
Page 1
®
CAUTION
NOTICE
®
7000 thermostat may be used, as
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
506611−01
*P506611-01*
Litho U.S.A.
27
36
40
45
46
46
47
46
48
50
52
53
56
57
63

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SLP98DFV and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Lennox SLP98DFV

Summary of Contents for Lennox SLP98DFV

  • Page 1: Table Of Contents

    ......SLP98DFV Gas Furnace ......

  • Page 2: Unit Dimensions

    Unit Dimensions − inches (mm) 9/16 (14) COMBUSTION AIR INTAKE RETURN AIR OPENING EXHAUST AIR OUTLET 2−1/16 (52) 2−1/4 9/16 (14) (57) (127) TOP VIEW 27−3/4 1−1/2 (38) (7705) Front Panel 9/16 19−7/16 9/16 (14) (494) (14) FLOW ELECTRICAL INLET (Either Side) 2 (51) Either Side...

  • Page 3: Parts Arrangement

    Parts Arrangement CONTROL BOX (includes variable capacity integrated control, transformer, circuit breaker and door switch) BLOWER ASSEMBLY (Variable Speed Blower BAG ASSEMBLY Motor Is Hidden) BLOWER ACCESS PANEL ACCESS PANEL COMBUSTION AIR INDUCER PRIMARY LIMIT GAS VALVE BURNER BOX ASSEMBLY FIGURE 1 Page 3...

  • Page 4: Slp98Dfv Gas Furnace

    A changeover kit may be ordered for LP CAUTION applications. The SLP98DFV must be installed only as a Direct Vent As with any mechanical equipment, personal injury gas central furnace. can result from contact with sharp sheet metal edges.

  • Page 5: Use Of Furnace As A Construction Heater

    Very low return air temperatures, harmful vapors and op- eration of the unit with clogged or misplaced filters will dam- age the unit. Dampers SLP98DFV units may be used for heating of buildings or Dampers (open during cooling (open during heating...

  • Page 6: General

    Dallas, TX 75379−9900 be positioned from level to 1/2" toward the front to aid in draining. See figure 4. CAUTION SETTING EQUIPMENT SLP98DFV unit should not be installed in areas nor- mally subject to freezing temperatures. AIR FLOW AIR FLOW AIR FLOW These instructions are intended as a general guide and do not supersede local codes in any way.
  • Page 7 NOTE − The 1/2 hp blower motor used in some SLP98DFV The unit may be installed three ways in downflow applica- tions: on non−combustible flooring, on combustible flooring unit is equipped with three flexible legs and one rigid leg. using a base, or on a reverse−flow cooling coil cabinet. Do...
  • Page 8 TABLE 1 NON−COMBUSTIBLE FLOOR OPENING SIZE SLP98DF UNIT Front to Rear Side to Side Cabinet Width SUPPLY AIR B Cabinet (17.5") 19 − 3/4 16 − 5/8 PLENUM C Cabinet (21") 19 − 3/4 20−1/8 PROPERLY COMBUSTIBLE SIZED FLOOR FLOORING BASE NOTE −...

  • Page 9: Filters

    PLENUM (Field Provided) SEALING STRIP SLP98DF UNIT (Field Provided) É É É É CABINET SIDE PANEL SECURE FROM COOLING COIL INSIDE CABINET Side View PROPERLY SIZED FLOOR FIGURE 12 OPENING PLENUM Filters This unit is not equipped with a filter or rack. A field−pro- vided filter is required for the unit to operate properly.

  • Page 10: Pipe And Fittings Specifications

    4 for approved piping and fitting materials. IMPORTANT TABLE 4 PIPING AND FITTINGS SPECIFICATIONS SLP98DFV exhaust and intake connections are Schedule 40 PVC (Pipe) D1785 made of PVC. Use PVC primer and solvent cement Schedule 40 PVC (Cellular Core Pipe) F891 when using PVC vent pipe.

  • Page 11: Joint Cementing Procedure

    2−1/2 *Requires field−provided and installed 1−1/2" exhaust accelerator. ** Kit 51W11 includes h a 1−1/2" accelerator which must be used for all SLP98DFV−070 and −090 installations. † Termination kits 44W92, 44W93, 30G28 and 81J20 approved for use in Canadian installations.

  • Page 12: Venting Practices

    Vent Piping Guidelines FIGURE 13 The SLP98DFV is installed only as a Direct Vent gas central furnace. REPLACING FURNACE THAT WAS PART OF A COMMON VENT SYSTEM NOTE −...
  • Page 13 NOTE − The exhaust collar on all models is sized to ac- commodate 2" Schedule 40 vent pipe. Contact the Ap- plication Department for more information concerning Furnace 070, 090, 110 sizing of vent systems which include multiple pipe sizes. Capacity? btuh NOTE −...
  • Page 14 TABLE 7 Maximum Allowable Intake or Exhaust Vent Length in Feet *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’ 2"...
  • Page 15 TABLE 7 Maximum Allowable Intake or Exhaust Vent Length in Feet *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. Concentric Termination at Elevation 0 − 4500’ 2"...
  • Page 16 TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION 2” 2” 2” DO NOT transition from smaller to larger pipe size in horizontal runs of exhaust pipe. 3” TRANSITION TRAP *2“ Use only the factory−supplied trap. Trap can be installed on either side of cabinet within 5 ft.

  • Page 17: Vent Termination Clearances

    VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA INSIDE CORNER DETAIL Fixed Operable Fixed Closed Closed Operable AREA WHERE TERMINAL AIR SUPPLY INLET VENT TERMINAL IS NOT PERMITTED US Installations Canadian Installations Clearance above grade, veranda, 12 inches (305mm) or 12 in.
  • Page 18 Details of Intake and Exhaust Piping Terminations for FIELD−SUPPLIED WALL TERMINATION OR Direct Vent Installations (15F74) WALL RING TERMINATION KIT NOTE − In Direct Vent installations, combustion air is tak- en from outdoors and flue gases are discharged to out- NOTE −...
  • Page 19 Intake Front View of Intake and Exhaust Exhaust Intake Exhaust TABLE 8 2" (51mm) 3" (76mm) Vent Pipe Vent Pipe A− Clearance above grade or average snow 12" (508MM) Min. 12" (508MM) Min. accumulation B−Horizontal 6" (152MM) Min. 6" (152MM) Min. separation between 24"...
  • Page 20 TABLE 9 FIELD−SUPPLIED WALL TERMINATION OR EXHAUST PIPE TERMINATION SIZE REDUCTION (15F74) WALL RING TERMINATION KIT SLP98DFV With INTAKE ELBOW Exhaust Pipe Size Termination Pipe Size MODEL *070 2", 2−1/2" or 3" 1−1/2" NOTE − FIELD−PROVIDED *090 2", 2−1/2" or 3"...

  • Page 21: Front View

    FIELD−PROVIDED 1−1/2" (38mm) accelerator EXHAUST VENT Front View REDUCER MAY BE RE- provided on 71M80 & QUIRED TO ADAPT 44W92 kits for SIZE LARGER VENT PIPE SL98DF070V36B TERMINATION SIZE TO TERMINATION. PIPE PER INTAKE INTAKE TABLE 9. OUTSIDE WALL EXHAUST EXHAUST Top View 1/2"...
  • Page 22 WALL TERMINATION KITS (CLOSE−COUPLE) EXTENDED VENT FOR GRADE CLEARANCE 2 inch (51 mm) 22G44 (US) 3 inch (76 mm) 44J40 (US) If intake and exhaust pipe is less than 12 in. (305 mm) above snow accumulation or other obstructions, field−fabricated piping must be installed. FIELD−PROVIDED REDUCER MAY BE REQUIRED TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION...
  • Page 23 Condensate Piping 3 − Install drain trap using appropriate PVC fittings, glue This unit is designed for either right- or left-side exit of con- all joints. Glue the provided drain trap as shown in fig- densate piping. Refer to figure 32 for condensate trap loca- ure 34.
  • Page 24 TRAP / DRAIN ASSEMBLY USING 1/2" PVC OR 3/4" PVC OPTIONAL Condensate Drain Connection Adapter 1/2 inch slip X Adapter 1/2 inch slip X 1/2 inch mpt (Not Furnished) Condensate Drain 1/2 inch mpt (Not Furnished) Connection In Unit Vent 90°...

  • Page 25: Gas Piping

    4 − Piping should be sloped 1/4 inch per 15 feet (6mm per CAUTION 5.6m) upward toward the gas meter from the furnace. The piping must be supported at proper intervals, ev- A separate drain line must be run to the drain from ery 8 to 10 feet (2.44 to 3.05m), using suitable hangers the condensate trap to ensure proper drainage and or straps.
  • Page 26 Left Side Piping AUTOMATIC MANUAL (Standard) GAS VALVE MAIN SHUT−OFF MANUAL (with manual VALVE AUTOMATIC MAIN SHUT−OFF shut−off valve) (1/8 in. NPT GAS VALVE VALVE plugged tap (with manual (1/8 in. NPT shown) shut−off valve) plugged tap shown) GROUND JOINT UNION GROUND JOINT...

  • Page 27: Electrical

    1 − Seal any unused openings in the common venting sys- tem. INTERIOR MAKE−UP BOX 2 − Inspect the venting system for proper size and horizontal (FACTORY− INSTALLED LEFT SIDE) pitch. Determine that there is no blockage, restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.
  • Page 28 SLP98DFV integrated control unless this is a Thermostat Selection communicating thermostat installation with a non− The SLP98DFV is designed to operate in a variable rate ca- communicating outdoor unit. pacity mode using a two−stage thermostat. The SLP98DFV will automatically adjust firing rate based upon thermostat 6 −...
  • Page 29 D The furnace requires 120 volts + 10% (Range: 108 switches 6 and 7. volts to 132 volts). 2 − When the SLP98DFV is running in the heating mode, D The furnace operates at 60 Hz + 5% (Range: 57 Hz to the integrated control will automatically adjust the 63 Hz).
  • Page 30 Toucht Thermostat with SLP98DFV icomfort Toucht Thermostat with SLP98DFV and Non−Communicating Outdoor Unit and icomfortt−ENABLED Outdoor Unit icomfort Toucht Thermostat icomfort Toucht Thermostat icomfortt−Enabled SLP98DFV Indoor Furnace icomfortt−Enabled SLP98DFV Indoor Furnace Non−Communicating Outdoor Air Conditioner icomfortt−Enabled Outdoor Air Conditioner or Heat Pump icomfortt−...
  • Page 31 Optional Accessories for use with any icomfort Toucht System icomfortt− NOTE: icomfortt THERMOSTAT SENSES HUMIDITY & CONTROLS ENABLED 24V H" OUTPUT (& 120V H" OUTPUT) TO CYCLE HUMIDIFIER SLP98DFV BASED ON DEMAND. NO OTHER CONTROL OR HUMIDISTAT FURNACE REQUIRED. OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HU- MIDIFIER (IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNCTIONS.
  • Page 32 TABLE 14 Field Wiring Connections for Non−Communicating Thermostat Applications DIP Switch Settings and On−Board Links (figure 44) W914 W915 (DS to R) W951 (Y1 to Y2) Dehumidifi- Thermostat Wiring Connections DIP Switch 1 (O to R) Two−Stage cation or Heat Pumps Cooling Harmony IIIt...
  • Page 33 TABLE 14 Field Wiring for Non−Communicating Applications (Continued) DIP Switch Settings and On−Board Links (figure 44) W914 W915 (DS to R) (Y1 to Y2) W951 Dehumidifi- Thermostat Wiring Connections DIP Switch 1 Two−Stage (O to R) cation or Cooling Heat Pumps Harmony IIIt 2 Heat / 2 Cool...
  • Page 34 * Connect W1 to W1 ONLY if using defrost tempering kit 67M41 NOTE − Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the SLP98DFV integrated control. Page 34...
  • Page 35 TYPICAL SLP98DFV WIRING DIAGRAM FIGURE 43 Page 35...

  • Page 36: Integrated Control

    Integrated Control INTEGRATED CONTROL NEUTRAL TERMINALS COMBUSTION AIR INDUCER CONNECTOR IGNITOR FLAME CONNECTOR SENSE DIAGNOSTIC LINE VOLTAGE PUSH BUTTON TERMINALS DIP SWITCHES INDOOR BLOWER CONNECTOR OUTDOOR AIR SENSOR TERMINALS 7−SEGMENT DIAGNOSTIC LED W915 Y1 TO Y2 DISCHARGE AIR SENSOR W951 R TO O TERMINALS W914 R TO DS FACTORY TEST...
  • Page 37 10 minutes fixed Two−Stage Heat (W1 70%, W2 100%) Two−Stage NOTE − When the SLP98DFV is used with an icomfort (time that the blower operates after the heating demand Toucht communicating thermostat, all indoor blower has been satisfied) can be adjusted by moving switches 4 speed selections and DIP switch settings are made by the and 5 on the integrated control.
  • Page 38 Switches 8 and 9 −− Cooling Mode Blower Speed −− The TABLE 20 Cooling Mode Blower Speed Ramping unit is shipped from the factory with the DIP switches posi- Ramping Option Switch 12 Switch 13 tioned for high speed (4) indoor blower motor operation A (Factory) during the cooling mode.
  • Page 39 Refer to table 24 for operation sequence in ap- form the high−fire and low−fire pressure switch calibra- plications including SLP98DFV, a thermostat which fea- tions and display CAL". After calibration, the LED will tures humidity control and a single−speed outdoor unit.

  • Page 40: Blower Motor Performance

    BLOWER DATA SLP98DF070V36B BLOWER PERFORMANCE (less filter) HEATING BLOWER PERFORMANCE Heating Input Range and Blower Volume - CFM Heating Adjust CFM Selections 100% Increase (+15%) Heat CFM 1022 1118 Increase (+7.5%) Heat CFM 1041 Default Heat CFM Decrease (-7.5% ) Heat CFM Decrease (-15% ) Heat CFM COOLING BLOWER PERFORMANCE Cooling Adjust CFM...
  • Page 41 BLOWER DATA SLP98DF090V48C BLOWER PERFORMANCE (less filter) HEATING BLOWER PERFORMANCE Heating Input Range and Blower Volume - CFM Heating Adjust CFM Selections 100% Increase (+15%) Heat CFM 1060 1195 1329 1464 1599 Increase (+7.5%) Heat CFM 1004 1129 1255 1381 1507 Default Heat CFM 1064...
  • Page 42 BLOWER DATA SLP98DF110V60C BLOWER PERFORMANCE (less filter) HEATING BLOWER PERFORMANCE Heating Input Range and Blower Volume - CFM Heating Adjust CFM Selections 100% Increase (+15%) Heat CFM 1096 1286 1475 1665 1855 2045 Increase (+7.5%) Heat CFM 1017 1199 1380 1562 1744 1926...
  • Page 43 TABLE 24 COOLING OPERATING SEQUENCE SLP98DFV and Single−Stage Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE Demand Relative Humidity Blower System Step Compressor Comments Condition Status (COOL) stage NO CALL FOR DEHUMIDIFICATION Compressor and indoor Normal Operation Acceptable High 100%...
  • Page 44 TABLE 25 COOLING OPERATING SEQUENCE SLP98DFV and Two−Stage Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE Demand Relative Humidity Blower System Step Compressor Comments Condition Status (COOL) stage stage NO CALL FOR DEHUMIDIFICATION Normal Operation − Acceptable Compressor and indoor blower follow thermostat Normal Operation −...

  • Page 45: Unit Start Up

    WARNING The gas valve on the SLP98DFV is equipped with a gas control switch. Use only your hand to move the control Do not use this furnace if any part has been under- switch.

  • Page 46: Gas Pressure Measurement

    9 − Replace the access panel. SLP98DFV units require no manifold pressure adjust- ments for operation at altitudes up to 10,000 feet (3048 m) 10− Turn on all electrical power to to the unit. above sea level. Units installed at altitude of 7,501 to 11−...

  • Page 47: Proper Combustions

    50 ppm. Flame Rollout Switches (Two) TABLE 28 These manually reset switches are located on the burner High Fire box. SLP98DFV Unit For Nat For L.P. Pressure Switches (Two) 070V36B The pressure switches are located in the heating compart- 090V36C ment on the combustion air inducer.

  • Page 48: Heating Sequence Of Operation

    Temperature Rise Applications Using a Two−Stage Thermostat A − Heating Sequence −− Control Thermostat Selection After the furnace has been started and supply and return air DIP switch in Two−Stage" Position (Factory Setting) temperatures have been allowed to stabilize, check the temperature rise with the unit operating at 100 percent fir- 1 −...
  • Page 49 closed contacts and pressure switches for normally Applications Using A Single−Stage Thermostat open contacts. The combustion air inducer is ener- C − Heating Sequence −− Control Thermostat Selection gized at ignition speed, which is approximately the DIP switch in Single−Stage" Position same as the inducer speed at 70 percent firing rate.

  • Page 50: Service

    Remove ground wire from vest pan- Filters All SLP98DFV filters are installed external to the unit. Fil- ters should be inspected monthly. Clean or replace the fil- 12 − Remove electrical junction box from the side of the fur- nace.
  • Page 51 19 − Thoroughly rinse and drain the heat exchanger. Soap 39 − Replace the blower compartment access panel. solutions can be corrosive. Take care to rinse entire 40 − Refer to instruction on verifying gas and electrical con- assembly. nections when re−establishing supplies. 20 −...

  • Page 52: Planned Service

    Planned Service A service technician should check the following items dur- Return air duct − Must be properly attached and provide ing an annual inspection. Power to the unit must be shut off an air seal to the unit. for the service technician’s safety. Operating performance −...

  • Page 53: Integrated Control Diagnostic Codes

    Integrated Control Diagnostic Codes Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. Release the button when the desired mode is displayed. When a solid "P" is displayed, the furnace capacity/ size is programmed. When the solid E"...
  • Page 54 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E 223 Low pressure switch failed open − Refer to troubleshooting in installation Check inches of water column pressure during operation instruction. of low pressure switch on heat call, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restric- tion.
  • Page 55 Integrated Control Diagnostic Codes (continued) Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover E 295 Indoor blower motor temperature is too high. Indoor blower motor over temperature (motor tripped on internal protector), Check motor bear- ings, amperes. Replace if necessary. E 310 Discharge error sensor failure −...

  • Page 56: Configuring Unit Size Codes

    UNIT SIZE alarm present, CODE FURNACE MODEL furnace control will display error code. If SLP98DFV−070−36B alarm is not present solid SLP98DFV−090−36C dash starts blinking on SLP98DFV−090−48C 7−segment LED display. SLP98DFV−090−60C SLP98DFV−110−60C Push and hold button until the solid P symbol is displayed on the 7−segment LED.

  • Page 57: Troubleshooting

    Troubleshooting: Heating Sequence of Operation IGNITION AND CALL FOR LOW FIRE WITH TWO−STAGE THERMOSTAT Safety Check Verify There Is No Main Burner Flame Indoor blower OFF After Heat OFF Delay (Low Heat Speed) Limit Combustion Air Limit De−Energize Error Code Indoor Blower Inducer On Switch...
  • Page 58 Troubleshooting: Heating Sequence of Operation (Continued) CALL FOR HIGH FIRE WITH TWO−STAGE THERMOSTAT 2 Stage Thermostat 1st Call for High Fire? 2nd Stage Recognition Delay (30 Seconds) Combustion Air Inducer ON (100% Rate Speed) High Pressure Switch Increase Combustion Error Code Wait 5 Closes Within Air Inducer Speed...
  • Page 59 Troubleshooting: Heating Sequence of Operation (Continued) CALL FOR HEAT SATISFIED RUN MODE (TWO−STAGE THERMOSTAT) RUN MODE (SINGLE−STAGE THERMOSTAT) FIRST OR SECOND−STAGE CALL FOR HEAT ALL INPUTS MONITORED (LIMIT, PRESSURE, ALL INPUTS MONITORED (LIMIT, PRESSURE, CALL FOR HEAT/COOL, FLAME LEVEL). CALL FOR HEAT/COOL, FLAME LEVEL). 2nd Stage Heat 2nd Stage Call for Heat...
  • Page 60 Troubleshooting: Heating Sequence of Operation (Continued) IGNITION AND CALL FOR HEAT WITH SINGLE−STAGE THERMOSTAT Safety Check Verify There Is No Main Burner Indoor Blower OFF After Flame Heat OFF Delay (Low Heat Speed) Indoor Blower Limit Limit De−Energize Combustion Air Error Code Switch Closes Within 3...

  • Page 61: Troubleshooting: Cooling Sequence Of Operation

    Troubleshooting: Cooling Sequence of Operation CALL FOR COOLING 1st Stage Cooling Request Received Energize 1st Stage Cooling Contactor (Compressor & Fan) Indoor Blower On After 2−second delay Energize Indoor Blower (Per Ramping Profile) 1st Stage 2nd Stage Cooling Request Cooling Still Active? Request? Energize 2nd Stage...
  • Page 62 Troubleshooting: Continuous Fan Sequence of Operation CONTINUOUS LOW SPEED INDOOR BLOWER SEQUENCE OF OPERATION Call for Continuous Blower Indoor Blower On (Speed Determined by Dip Switch settings) Request Maintain Indoor for Cooling Go to Call for Cooling Blower at set speed Received? Go to Call for Heat −−...

  • Page 63: Repair Parts List

    Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the nameplate −− Example: SLP98DF070V36B. All service must be performed by a licensed profes- sional installer (or equivalent), service agency, or gas supplier. Cabinet Parts Heating Parts Outer access panel...
  • Page 64 Requirements for Commonwealth of Massachusetts Modifications to NFPA−54, Chapter 10 4 − INSPECTION. The state or local gas inspector of the side wall, horizontally vented, gas−fueled equipment Revise NFPA−54 section 10.8.3 to add the following re- shall not approve the installation unless, upon inspec- quirements: tion, the inspector observes carbon monoxide detec- For all side wall, horizontally vented, gas−fueled equipment...

This manual is also suitable for:

Signature slp98dfv

Table of Contents