Form 43471030
-26-
Sept 2011
16.0)
LIGHTING AND SHUTDOWN INSTRUCTIONS
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.
17.0)
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 low fire
Draft inducer
Red air switch light
Ignition
Air switch
Gas valve
Flame sensing
Amber valve light - low fire
Function ON
Function OFF
Green power light
30 secs pre-purge
21 secs trial for ignition
Normal high fire operation
flame sensing
Thermostat - high fire off
T5
Thermostat high fire
Amber valve light - high fire
Thermostat (turn off), Heater OFF
T6
If the flame is not sensed during sequence T3 or T4, then the burner will automatically begin ignition as in
sequence T2. If the flame is not re-established the heater will go to lockout.
