Inspection and Maintenance
8-10
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
Turn the burner switch off. Reset the safety switch. Reopen the gas pilot shutoff cock and re-establish main fuel
supply.
FIGURE 8-11.
Gas Pilot Shutoff Cock
8.6.2 — Checking Failure to Light Main Flame
Leave the gas pilot shutoff cock open. Shut off the main burner fuel supply. Turn the burner switch on. The pilot
will light upon completion of the pre-purge period. The main fuel valve(s) will be energized, but there should be no
main flame.
The fuel valve(s) de-energize within 4 seconds after the main burner ignition trial ends. The control will lock out on
a safety shutdown. 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. Reset the safety switch. Re-establish main fuel supply.
8.6.3 — Checking Loss of Flame
With the burner in normal operation, shut off the main burner fuel supply to extinguish main flame.
The fuel valve(s) will be de-energized and the relay will signal the condition within 4 seconds. The control will then
lock out on a safety shutdown. 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. Reset the safety switch. Re-establish main fuel supply.
Содержание 4WI
Страница 46: ...Burner Operation and Control 2 22 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 62: ...Waterside Care and Requirements 3 16 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 70: ...Sequence of Operation 4 8 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 114: ...Adjustment Procedures 6 28 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 192: ...Parts 9 38 750 211 revised 2009 Promethean Boilers Model 4WI Manual 9 2 27 General Control Panel 60 106 100 800 HP...
Страница 196: ...Parts 9 42 750 211 revised 2009 Promethean Boilers Model 4WI Manual 9 2 29 Main Gas Train 60 106 100 800 HP...