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7.2.
Heater emergency shutdown
When the heater shuts down due to an emergency, the main power disconnect should be turned OFF and
gas supply, shut off by closing the gas supply hand valve located in the main gas supply line to the heater.
7.3.
Turning on the heater after a flame failure alarm
After a flame failure alarm, the following checks must be performed:
1.
Set the main power switch to OFF.
2.
Ensure that all gas supply hand valves are open.
3.
Check the blower belts; replace or adjust them if necessary.
4.
Check flame safeguard relay and fire rod condition.
5.
Check condition of filters and replace them if necessary.
6.
Ensure that nothing obstructs the air inlet and outlet of the heater.
7.
Ensure that nothing prevents proper operation of inlet or outlet air dampers.
8.
Turn ON main disconnect.
9.
Press the reset button of the flame safeguard relay.
10.
Ensure that the air inlet and outlet dampers are operating properly.
11.
Ensure that the blower motor is operating.
12.
Ensure that the pilot ignites properly.
If the heater still does not start, call the manufacturer or an authorized service company for assistance.
8.
TROUBLESHOOTING
8.1.
Normal operating sequence
The (FIREYE) flame safeguard relay includes five lights to indicate that the operating sequence is
normal and to also show a burner malfunction.
NORMAL OPERATING SEQUENCE
1.
The OPR CTRL light is on when there is a heating demand and terminal 7 is energized.
2.
The AIR FLOW light is on when all the safety devices as well as the low and high air pressure and high
temperature limit switches are closed and terminal 6 is energized.
3.
The PTFL light is on only during the pilot ignition cycle.
4.
The FLAME light is on only when the flame safeguard relay detects a flame signal and is not in alarm
mode.
5.
The ALARM light flashes when a malfunction is detected.