Chapter 2 Profire V Burner
2-48 750-177
Main Flame Failure
1. Shut off the main fuel supply and leave the gas pilot shutoff cock open.
2. Turn the switch on. The pilot will light upon completion of the pre-purge period. The main fuel valves will be ener-
gized, but there should be no main flame.
3. The fuel valves de-energize within four seconds after the main burner ignition trial ends. The control will lock out on
a safety shutdown.
4. The flame failure light (and optional alarm) will be activated. The blower motor will run through the post-purge and
stop. Turn the burner switch off and reset the safety switch. Re-establish main fuel supply.
Loss of Flame
1. With the burner in normal operation, shut off the main burner fuel supply to extinguish main flame.
2. The fuel valves will be de-energized and the relay will signal the condition within four seconds. Thecontrol will then
lock out on a safety shutdown.
3. The flame failure light (and optional alarm) will be activated. The blower motor will run through the post-purge
period and stop.
Turn the burner switch off and reset the safety switch. Re-establish the main fuel supply.
EXTENDED SHUTDOWN
When shutting down the burner for an extended period of time, the operator should use the following general
guidelines to protect the burner from its surrounding elements. This will add to the operating life of the burner:
1. Turn the main electrical disconnect switch to the burner to “Off.”
2. Close all main fuel valves.
3. If the burner operates in a damp environment, cover it with plastic to protect all electrical components from mois-
ture. Remove burner control and store in a dry area.
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