Lennox SLP98DFV User Manual

Page 1
INSTALLATION
INSTRUCTIONS
SLP98DFV
507027-02
05/2016
Superseds 507027-01
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
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 man-
uals, be alert to the potential for personal injury or death.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
NOTICE
A thermostat is not included and must be ordered
separately.
• The Lennox iComfort Wi-Fi
®
thermostat must be used
in communicating applications.
• In non-communicating applications, the Lennox
ComfortSense
®
7500 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 both communicating and non-
communicating applications is illustrated in diagrams,
which begin on page 34.
© 2016 Lennox Industries Inc.
Dallas, Texas USA
DAVE LENNOX SIGNATURE®
COLLECTION GAS FURNACES
DOWNFLOW AIR DISCHARGE
Contents
Unit Dimensions - inches (mm) ......................................2
Parts Arrangement..........................................................3
SLP98DFV Gas Furnace ................................................4
Shipping and Packing List ..............................................4
Safety Information ..........................................................4
Building Codes ...............................................................4
Use of Furnace as Construction Heater .........................5
General ...........................................................................6
Installation - Setting Equipment ......................................6
Filters ..............................................................................9
Duct System ...................................................................9
Pipe & Fittings Specications .......................................10
Venting Options ............................................................12
Joint Cementing Procedure .......................................... 13
Venting Pracitces ..........................................................14
Vent piping Guidliens ....................................................14
Gas Piping ....................................................................29
Electrical .......................................................................32
Integrated Control .........................................................40
Blower Data ..................................................................44
Unit Start-Up .................................................................49
Turning Off Gas to Unit ................................................. 50
High Altitude Information ..............................................50
Gas Pressure Measurement.........................................50
Proper Combustion.......................................................50
Other Unit Adjustments.................................................53
Heating Sequence of Operation ...................................53
Service..........................................................................55
Repair Parts..................................................................56
Integrated Control Diagnostic Codes............................57
Conguring Unit Size Codes ........................................60
Troubleshooting: Heating Sequence of Operation .......61

Lennox SLP98DFV Specifications

General

Model	SLP98DFV
Type	Gas Furnace
Efficiency Rating	Up to 98.7% AFUE
Fuel Type	Natural Gas or Propane
Ignition Type	Direct Spark Ignition
Stages	Modulating
Blower Motor	Variable Speed
Warranty	10-Year Limited Warranty

Summary

Installation Instructions SLP98DFV

Safety Warnings and Cautions

General warnings and cautions regarding installation and operation hazards.

Safety Information and Codes

General Safety Information

Critical safety warnings and cautions for installation, adjustment, and maintenance.

Piping Sizing Process

Important Venting Notes

Critical notes regarding vent pipe usage, installation, and termination.

Vent Termination Clearances

Clearance Requirements (USA and Canada)

Table detailing required clearances for vent terminals and air supply inlets.

General Vent Termination Guidelines

Important Venting Considerations

Important notes on vent termination materials and Canadian installation spacing.

Direct Vent Piping Terminations

Intake and Exhaust Routing

Options for routing intake and exhaust pipes horizontally or vertically.

Field Fabricated Wall Terminations

Condensate Piping Installation

Condensate Management

Gas Piping Requirements

Gas Piping Installation

Instructions for routing and connecting gas supply piping to the furnace.

Leak Check and Safety

Procedures for checking gas connections for leaks and important safety warnings.

Electrical Connections and Safety

Electrostatic Discharge (ESD) Precautions

Precautions to prevent damage from electrostatic discharge during installation.

Wiring and Circuit Breaker Sizing

Guidelines for proper wiring size, circuit breaker selection, and grounding.

Thermostat and Blower Configuration

Thermostat Selection

Guidance on selecting and setting up compatible thermostats for optimal performance.

icomfort Wi-Fi® Thermostat Wiring Diagrams

Non-Communicating System Wiring

Wiring diagram for icomfort Wi-Fi® thermostat with non-communicating outdoor units.

Communicating System Wiring

Wiring diagram for icomfort Wi-Fi® thermostat with communicating outdoor units.

Non-Communicating Thermostat Wiring

Table 14: Thermostat Wiring Configurations

Table detailing field wiring connections for various non-communicating thermostats.

Furnace Wiring Diagram

Typical SLP98DFV Wiring Diagram

Detailed wiring diagram of the SLP98DFV furnace, including component labels.

Integrated Control Terminal Connections

Integrated Control Overview

Diagram and explanation of terminals on the integrated control board.

Thermostat Connections (TB1)

Specific terminal assignments for thermostat wiring connections.

Thermostat and Blower Speed Settings

Cooling Mode Blower Speed and Ramping

Heating Mode Blower Speed and Control Features

Diagnostic Features

Information on diagnostic LEDs, push buttons, error code recall, and field test modes.

Blower Performance Data

Cooling Operating Sequences

Single-Stage Outdoor Unit Sequences

Operating sequences for cooling with a single-stage outdoor unit, including dehumidification.

Cooling Operating Sequences (Two-Speed)

Two-Speed Outdoor Unit Sequences

Operating sequences for cooling with a two-speed outdoor unit and dehumidification.

Unit Start-Up and Gas Valve Operation

Safety Before Operating

Critical safety precautions and warnings before operating the furnace.

Placing the Furnace into Operation

Instructions for automatically lighting burners and placing the furnace into operation.

Gas Pressure and Combustion Checks

Gas Pressure Measurement

Proper Combustion Analysis

Manifold and Operating Pressure Measurements

Manifold Pressure Measurement

Operating Pressure Signal Measurement

Unit Adjustments and Operation Sequences

Heating Sequence of Operation

Detailed explanation of the heating sequence for two-stage thermostats.

Heating Sequence Details

Two-Stage Thermostat Heating Sequence

Step-by-step description of the heating sequence for two-stage thermostats.

Single-Stage Thermostat Heating Sequence

Step-by-step description of the heating sequence for single-stage thermostats.

Service and Maintenance

Service Procedures

Warnings and procedures related to servicing the furnace safely.

Annual Furnace Maintenance

Maintenance and Repair Parts

Integrated Control Diagnostic Codes

Diagnostic Codes (A-E180)

Integrated Control Diagnostic Codes (Cont.)

Diagnostic Codes (E200-E273)

Diagnostic Codes (E274-E401)

Integrated Control Diagnostic Codes & Configuration

Diagnostic Codes (E402-E409)

Configuring Unit Size Codes

Procedure for configuring the furnace unit size code for proper operation.

Troubleshooting: Heating Sequence of Operation

Ignition and Call for Low Fire (Two-Stage)

Troubleshooting flowchart for ignition and low fire operation with a two-stage thermostat.

Troubleshooting: Heating Sequence (Two-Stage)

Call for High Fire (Two-Stage)

Troubleshooting flowchart for high fire operation with a two-stage thermostat.

Troubleshooting: Heating Sequence (Single-Stage)

Ignition and Call for Heat (Single-Stage)

Troubleshooting flowchart for ignition and heat calls with a single-stage thermostat.

Troubleshooting: Cooling Sequence of Operation

Call for Cooling

Troubleshooting flowchart for the cooling sequence, including single and two-stage operation.

Troubleshooting: Continuous Fan Sequence

Continuous Low Speed Indoor Blower

Troubleshooting flowchart for the continuous low speed indoor blower sequence.