Page 1
INSTALLATION
INSTRUCTIONS
SL297UHNV
507760-04
09/2019
Supersedes 507760-03
NOTICE
A thermostat is not included and must be ordered
separately.
A communicating thermostat must be used in
communicating applications.
In non-communicating applications, any Lennox
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 both communicating and non-
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.
© 2019 Lennox Industries Inc.
Dallas, Texas USA
DAVE LENNOX SIGNATURE®
GAS FURNACE UPFLOW / HORIZONTAL
AIR DISCHARGE
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
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
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.
Heatexchanger Tubes
Summary of Contents for DAVE LENNOX SIGNATURE SL297UHNV
Page 39: ...Page 39 Figure 48...
