
Form 43343120
-44-
July 2021
16.0)
LIGHTING AND SHUTDOWN INSTRUCTIONS
53.
Turn on the gas and electrical supply.
54.
Set the thermostat to call for heat. The blower motor will energize.
55.
Ignition should occur after the 15-second pre-purge.
56.
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.
57.
If the heater does not light, manually reset the thermostat or shut off power completely for 5 minutes before
attempting to relight.
58.
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 PGR/PTU 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).
Содержание PGR 100-L5
Страница 47: ...Form 43343120 46 July 2021 18 0 CONTROL COMPONENT LOCATION ...
Страница 49: ...Form 43343120 48 July 2021 20 0 TROUBLESHOOTING GUIDE SINGLE STAGE N5 L5 ...
Страница 50: ...Form 43343120 July 2021 49 TROUBLESHOOTING GUIDE SINGLE STAGE CONTINUED ...
Страница 51: ...Form 43343120 50 July 2021 TROUBLESHOOTING GUIDE SINGLE STAGE CONTINUED ...
Страница 52: ...Form 43343120 July 2021 51 20 8 TROUBLESHOOTING GUIDE TWO STAGE N7 L7 ...
Страница 53: ...Form 43343120 52 July 2021 TROUBLESHOOTING GUIDE TWO STAGE CONTINUED ...
Страница 54: ...Form 43343120 July 2021 53 TROUBLESHOOTING GUIDE TWO STAGE CONTINUED ...
Страница 56: ...Form 43343120 July 2021 55 21 10 REMOVING GAS VALVE AND MANIFOLD ASSEMBLY 21 11 AIR SWITCH PRESSURE CHECK ...