Detroit Radiant Products Company DR Series - Manual (Page 19)

DR Series Manual
18 19
WARNING
!
3.0 Operation
3.0 Operation • Lighting Instructions
Do not attempt to ignite a direct spark ignition heater by hand. Failure to comply could
result in personal injury, property damage, explosion, fire or death.
Direct Spark Ignition (NFS-2 / PFS-2)
Lighting Instructions
1 Rotate the heater’s valve knob to the “ON” position.
2 Close electrical circuit (typically the thermostat).
3 If the heater fails to light, turn off gas, open electrical circuit and wait 5 minutes before repeating the
above steps.
Shutdown Instructions
1 Open electrical circuit.
2 Rotate the heater’s valve knob to the “OFF” position.
Sequence of Operation
Starting Circuit: Upon a call for heat, voltage is applied to L1 and Neutral. After a pre-purge, the spark
electrode is energized and the gas valve opens. The trial for ignition is 15 seconds. If flame is not
sensed, the heater will attempt two more times to reignite.
Running Circuit: After ignition, the sensing electrode monitors the burner flame. If sense of flame is lost,
the control immediately acts to reignite the gas-air mixture. If flame sense is not established within 15
seconds, the heater will attempt two additional ignition sequences before proceeding to hard lockout. The
control can be reset by briefly interrupting the power source.
Millivolt (NMV-2 / PMV-2)
Lighting Instructions
1 Purge main gas supply line.
2 Slightly depress and rotate the heater’s manual gas valve knob COUNTERCLOCKWISE from the
“OFF” position to the “PILOT” position.
3 Fully depress the manual gas valve knob and light the pilot burner. Continue to depress for 30
seconds and then release.
4 Rotate the heater’s valve knob to the “ON” position.
5 Close the control circuit. If the heater fails to light, turn off the gas, open control circuit and wait 5
minutes before repeating the above steps.
Shutdown Instructions
1 Open the control circuit.
2 Rotate the heater’s valve knob to the “PILOT” position, depress slightly and rotate to the “OFF” position.
Sequence of Operation
Starting Circuit: After manually lighting the pilot (see lighting instructions), upon a call for heat, the main
burner solenoid is energized. The gas valve opens and the pilot lights the main burner.
Running Circuit: After ignition, the powerpile monitors the pilot flame. If the pilot flame is lost, the
powerpile cools and closes the valve within 180 seconds. See lighting instructions to relight the heater.
Upon satisfactory completion of the electrical supply and purging of the gas supply line to the heater(s),
follow the lighting instructions on the heater’s rating label to put the heater into operation.