Lennox EL180UHNE Series User's Information Manual page 4

Start-Up & Operation Information
NOTE - When the furnace is not in operation the diagnostic
LED will display a "slow flash" - 1 second on 1 second off.
On a call for heat demand and normal heating operation
the diagnostic RED LED will display a "continuous rapid
flash". The RED LED can be seen through the viewport on
the lower access panel. See figure 2.
WARNING
If you do not follow these instructions exactly, a fire
or explosion may result causing property damage,
personal injury or death.
Furnace Integrated Control
RED LED
FIGURE 2
BEFORE PLACING THE UNIT INTO OPERATION, 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 EL180UHNE will be equipped with a
gas control switch. Use only your hand to move the
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 fire or explosion.
Placing the EL180UHNE furnace into operation:
EL180UHNE units are equipped with an ignition system.
Do not attempt to manually light the burner on this fur­
nace. Each time the thermostat calls for heat, the burner
will automatically light.
Operating the Gas Valve (Figure 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 upper access panel.
6 - Move switch on gas valve to OFF. See figure 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. See figure 3.
GAS VALVE SHOWN IN THE ON POSITION
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 section
"Turning Off Gas to the Unit" and call your licensed
professional service technician (or equivalent).
Turning Off Gas to the Unit
If overheating occurs or if gas supply fails to shut off,
shut off the manual gas valve to the furnace 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 OFF.
5 - Replace the upper access panel.
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.
Page 4
FIGURE 3
WARNING
WARNING