Crown Boiler BSI379, BSI241, BSI276 Honeywell VR8204/VR8304 Series GAS Valves BSI069 Robertshaw

Blocked Vent (“Spill”) Switch - Automatically interrupts burner operation in the event that flue gas spills from the draft diverter opening. This switch is equipped with a reset button which must be pressed to restore normal burner operation. An open blocked vent switch is indicative of a problem with the vent system. If the blocked vent switch opens, the cause of the venting problem must be found and corrected by a qualified gas service technician before the blocked vent switch is reset.

Flame Roll-out Switch - Automatically interrupts burner operation when flames or excessive heat are present in vestibule. The flame roll-out switch is a single use device which must be replaced by an identical switch in order to restore normal operation. An open flame roll-out switch is usually indicative of a plugged heat exchanger. The cause of the flame roll-out must be found and corrected by a qualified gas service technician, and the switch replaced with an identical one, before the boiler is returned to operation.

VENT DAMPER (NOTE 2)

NOTE 3

LESS VENT

DAMPER

HONEYWELL VR8204/VR8304

SERIES GAS VALVES (BSI069 - 345)

TH

TR

ROBERTSHAW

+7000DERHC

GAS VALVE (BSI379)

2. VENT DAMPER REQUIRED ON BSI069 - BSI276, OPTIONAL ON BSI310 -BSI379

3. ON BOILERS LESS VENT DAMPER, DAMPER HARNESS IS NOT USED. RED AND BLUE LEADS SHOWN ARE JUMPED TOGETHER USING RED JUMPER WIRE.

FIGURE19: WIRINGDIAGRAM,INTERMITTENTIGNITIONANDMcDONNELL&MILLERMODEL #67 LOW WATER CUTOFF

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