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Lennox LHT078H

Lennox LHT078H
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Page 25
4- This appliance is equipped with an ignition device
which automatically lights the burner. Do not try to
light the burner by hand.
5- Open or remove the heat section access panel.
6- Turn gas valve switch to OFF. See figure 23. On
Honeywell VR8305Q gas valves, turn the knob on the
gas valve clockwise
to “OFF”. Do not force. See
figure 24.
7- Wait five (5) 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
the next step.
8- Turn gas valve switch to ON. See figure 23. On
Honeywell VR8305Q gas valves, turn the knob on the
gas valve counterclockwise
to “ON”. Do not
force. See figure 24.
9- Close or replace the heat section access panel.
10- Turn on all electrical power to appliance.
11- Set thermostat to desired setting.
12- The ignition sequence will start.
13- If the appliance does not light the first time (gas line
not fully purged), it will attempt up to two more
ignitions before locking out.
14- If lockout occurs, repeat steps 1 through 10.
15- If the appliance will not operate, follow the
instructions “Turning Off Gas to Appliance” and call
your service technician or gas supplier.
Turning Off Gas to Unit
1- If using an electromechanical thermostat, set to the
lowest setting.
2- Before performing any service, turn off all electrical
power to the appliance.
3- Open or remove the heat section access panel.
4- Turn gas valve switch to OFF. On Honeywell
VR8305Q gas valves, turn the knob on the gas valve
clockwise
to “OFF”. Do not force.
5- Close or replace the heat section access panel.
WARNING
Danger of explosion. Can cause injury or
death. Do not attempt to light manually.
Unit has a direct spark ignition system.

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