Lennox SLP98DF090XV60C - User Manual

Page 1
© 2016 Lennox Industries Inc.
Corp. 1030-L7
SLP98DFV
Service Literature
Revised 05-2016
SLP98DFV SERIES UNITS
SLP98DFV series units are high-efficiency downflow gas
furnaces equipped with variable capacity gas valve, vari
able speed combustion air inducer and variable speed in
door blower motor. All models are designed for direct vent
(dual pipe) venting system only. SLP98DFV units are avail
able in heating capacities from 66,000 to 132,000 Btuh
(19.3 to 38.6 kW) and cooling applications from 2 to 5 tons
(7.0 kW to 17.5 kW). Refer to Engineering Handbook for
proper sizing.
Units are factory-equipped for use with natural gas. Kits are
available for conversion to LPG operation. SLP98DFV mod
els include a SureLight
®
variable capacity integrated control
that can be used with Lennox icomfort Wi-Fi
®
thermostat as
part of a communicating comfort system. All SLP98DFV
units meet the California Nitrogen Oxides (NO
x
) Standards
and California Seasonal Efficiency requirements.
All specifications in this manual are subject to change. Pro
cedures outlined in this manual are presented as recom
mendations only and do not supersede or replace local or
state codes. In the absence of local or state codes, the
guidelines and procedures outlined in this manual (except
where noted) are recommendations only and do not consti
tute code.
TABLE OF CONTENTS
Specifications Page 2.............................
Optional Accessories Page 3......................
Blower Data Page 4..............................
I Unit Components Page 8........................
II icomfort Wi-Fi
®
Thermostat Page 33..............
III Placement and Installation Page 35..............
IV Start Up Page 53..............................
V Heating System Service Checks Page 54..........
VI Typical Operating Characteristics Page 57........
VII Maintenance Page 57..........................
VIII Wiring and Sequence of Operation Page 60.....
IX Field Wiring Page 68...........................
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 HVAC in
staller (or equivalent), service agency or the gas sup
plier.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.
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.

Summary

SPECIFICATIONS

BLOWER DATA

I-UNIT COMPONENTS

A-Control Box

Details on the control transformer, interlock switch, circuit breaker, and integrated control.

III-PLACEMENT AND INSTALLATION

IV-START-UP

A-Preliminary and Seasonal Checks

B-Heating Start-Up

Step-by-step instructions for initiating the heating cycle.

V-HEATING SYSTEM SERVICE CHECKS

B-Gas Piping

Guidelines and checks for gas supply piping and connections.

VII-MAINTENANCE

Cleaning Heat Exchanger

Cleaning the Burner Assembly

VIII- Wiring and Sequence of Operation

Sequence of Operation and Troubleshooting Flow Chart

Flow charts detailing furnace operation and fault diagnostics.

Heating Sequence - Single-Stage Thermostat

Heating Sequence - Two-Stage Thermostat

High Fire Sequence - Two-Stage Thermostat

Operational sequence for high fire demand with a two-stage thermostat.

Heat Satisfied Sequence

Operational logic when the call for heat is fulfilled.

Low Fire Ignition Sequence - Single-Stage Thermostat

Operational sequence for ignition and low fire with a single-stage thermostat.

Cooling Sequence

IX- Field Wiring

Non-Communicating Thermostat Wiring

Wiring diagrams and DIP switch settings for non-communicating thermostats.

Dual Fuel Heat Pump Wiring

Wiring for dual fuel heat pump thermostats and dual stage gas heat.

Lennox SLP98DF090XV60C Specifications

General

Model	SLP98DF090XV60C
Type	Gas Furnace
Efficiency Rating	Up to 98.7% AFUE
Heating Capacity	90, 000 BTU/h
Blower Type	Variable Speed
Fuel Type	Natural Gas
Stages	Modulating
Ignition	SureLight® Igniter
Warranty	Limited Lifetime Heat Exchanger, 10-Year Parts Warranty