Lennox SL280DFV SERIES User Manual

Page 4
Start-Up & Operation Information
WARNING
If you do not follow these instructions exactly, a re
or explosion may result causing property damage,
personal injury or death.
BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the oor because some
gas is heavier than air and will settle on the oor.
The gas valve on the SL280DFV is equipped with a gas
control switch. Use only your hand to move the gas con-
trol switch. Never use tools. If the switch will not move by
hand, do not try to repair it. Call a licensed professional
service technician (or equivalent). Force or attempted re-
pair may result in a re or explosion.
Placing the SL280DFV furnace into operation:
SL280DFV units are equipped with a SureLight® ignition
system. Do not attempt to manually light burners on these
furnaces. Each time the thermostat calls for heat, the
burners will automatically light. The ignitor does not get
hot when there is no call for heat on units with the Sure-
Light® ignition system.
Operating the Gas Valve (Figures 2 and 3)
1 - STOP! Read the safety information at the beginning
of this section.
2 - Set the thermostat to the lowest setting.
3 - Turn o󰀨 all electrical power to the unit.
4 - This furnace is equipped with an ignition device
which automatically lights the burners. Do not try to
light the burners by hand.
5 - Remove the access panel.
6 - Move switch on gas valve to OFF. Do not force. See
gure 2 or 3.
7 - Wait ve minutes to clear out any gas. If you
then smell gas, STOP! Immediately call your gas
supplier from a neighbor’s phone. Follow the gas
supplier’s instructions. If you do not smell gas go
to next step.
GAS VALVE SHOWN IN OFF POSITION
WHITE RODGERS GAS VALV E
Figure 2
GAS VALVE SHOWN IN ON POSITION
HONEYWELL GAS VALVE
Figure 3
8 - Move switch on gas valve to ON. Do not force. See
gure 2 or 3.
9 - Replace the upper access panel.
10 - Turn on all electrical power to the unit.
11 - Set the thermostat to desired setting.
NOTE - When unit is initially started, steps 1 through
11 may need to be repeated to purge air from gas line.
12 - If the appliance will not operate, follow the
instructions “Turning O󰀨 Gas to the Unit” and call
your service technician or gas supplier.
Turning O󰀨 Gas to the Unit
WARNING
If overheating occurs or if gas supply fails to shut
o󰀨, shut o󰀨 the manual gas valve to the appliance
before shutting o󰀨 electrical supply.
1 - Set the thermostat to the lowest setting.
2 - Turn o󰀨 all electrical power to the unit if service is to
be performed.
3 - Remove the upper access panel.
4 - Move switch on gas valve to OFF. Do not force. See
gure 2 or 3.
5 - Replace the access panel.
WARNING
Do not set thermostat below 60°F (16°C) in heating
mode. Setting thermostat below 60°F (16°C) reduces
the number of heating cycles. Damage to the unit
may occur that is not covered by the warranty.

Lennox SL280DFV SERIES Specifications

General

Brand	Lennox
Model	SL280DFV SERIES
Category	Furnace
Language	English