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Start-Up & Operation Information
WARNING
If you do not follow these instructions exactly, a fire
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 floor because some gas
is heavier than air and will settle on the floor.
The gas valve on the SL280UHV is equipped with a gas
control switch. Use only your hand to move the gas control
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 repair may
result in a fire or explosion.
Placing the SL280UHV furnace into operation:
SL280UHV 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 burn
ers will automatically light. The ignitor does not get hot
when there is no call for heat on units with the SureLight
®
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 off 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
figure 2 or 3.
7 - Wait five 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 instruc
tions. If you do not smell gas go to next step.
8 - Move switch on gas valve to ON. Do not force. See fig
ure 2 or 3.
GAS VALVE SHOWN IN OFF POSITION
WHITE RODGERS GAS VALVE
FIGURE 2
GAS VALVE SHOWN IN ON POSITION
HONEYWELL GAS VALVE
FIGURE 3
9 - Replace the upper access panel.
10 - Turn on all electrical power to 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 Off Gas to the Unit” and call your service tech
nician or gas supplier.
Turning Off Gas to the Unit
WARNING
If overheating occurs or if gas supply fails to shut off,
shut off the manual gas valve to the appliance before
shutting off electrical supply.
1 - Set the thermostat to the lowest setting.
2 - Turn off 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
figure 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.
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