Form 43343050
Jan 2014
-35-
18.0)
LIGHTING AND SHUTDOWN INSTRUCTIONS
Failure to do so may result in death, serious injury or property
damage.
The access panel must be closed tightly during operation.
Never operate the heater with the access panel open or removed.
1.
Turn on the gas and electrical supply. Rotate the gas valve knob counter-clockwise
to the “ON” position.
2.
Set the thermostat to call for heat. The blower motor will energize.
3.
Ignition should occur after the 30-second air pre-purge.
4.
If ignition fails, the unit will spark for approximately 21 seconds and go into safety lockout. Turn the
thermostat (power) off for 60 seconds to take the system out of lockout.
5.
If the heater does not light, manually reset the thermostat or shut off power completely for 5 minutes before
attempting to relight.
6.
To permanently shut down the heater, rotate the gas valve knob clockwise
to the “OFF” position and turn
off the gas and electrical supply.
NOTE:
NOTE:
NOTE:
NOTE: T
TT
The lighting and shutdown instructions are also shown on the permanent nameplate label attached to the
he lighting and shutdown instructions are also shown on the permanent nameplate label attached to the
he lighting and shutdown instructions are also shown on the permanent nameplate label attached to the
he lighting and shutdown instructions are also shown on the permanent nameplate label attached to the
heater control box.
heater control box.
heater control box.
heater control box.
19.0)
SEQUENCE OF OPERATION
The chart below shows the sequence of operation for the normal operating cycle.
T0
T1
T2
T3
T4
Call for heat, Thermostat on
Thermostat
Blower
Red light
Ignition
Air switch
Gas valve
Flame sensing
Amber valve light
Function ON
Function OFF
Green power light
30 secs pre-purge
21 secs trial for ignition
Normal operation flame sensing
Thermostat off, Heater OFF
T5
If the flame is not sensed during sequence T3 then the burner will automatically begin ignition sequence T2. If
the flame is not re-established the heater will go to lockout.
