Space-Ray PCA-SS 100, Assembly, Installation And Operation Instructions, Page: 45 / 62

Form 43343110
-44- May 2021
16.0) LIGHTING AND SHUTDOWN INSTRUCTIONS
1. Turn on the gas and electrical supply.
2. Set the thermostat to call for heat. The blower motor will energize.
3. Ignition should occur after the 15-second pre-purge.
4. If the burner fails to light, or flame is not detected during the first trial for ignition (a period of approximately
15 seconds) the gas valve is de-energized and the control goes through an inter-purge delay of approximately
60 seconds before another ignition attempt. The control will attempt two additional ignition trials before
going into lockout, and the valve relay will be de-energized immediately. The blower will be turned off
following a post-purge period of approximately 30 seconds.
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, turn off the gas and electrical supply.
NOTE: The lighting and shutdown instructions are also shown on the permanent nameplate label attached to the
heater control box.
17.0) SEQUENCE OF OPERATION – SINGLE STAGE (N5/L5)
The chart below shows the sequence of operation for the normal operating cycle of the heater when connected to
a permanent 120V power supply and the heater is turned on and off by a remote 24V thermostat. (Electrical
connection diagram C).