Vermont Casting BHDR36 installation instructions SIT 820 Nova Millivolt Valve

START

GAS SUPPLY ON

▼

LIGHT PILOT WITH

PIEZO IGNITION

YES

NO

NO

▼

▼

CHECK

•SHUTOFF VALVE OPEN

•CONFIRM GAS HOOK-UP

•ELECTRODE GAP MIN. 1/8"

•ELECTRODE CRACKED

•ELECTRODE CABLE ATTACHED

•PIEZO IGNITOR GENERATES SPARK

•ELECTRODE CABLE NOT GROUNDED

▼

PILOT STAYS ON

YES

NO

▼

•FLAME ENGULFING THERMOCOUPLE BY 3/8"

•THERMOCOUPLE ATTACHED TO VALVE

•MNIMUM MILLIVOLT:

OPEN CIRCUIT 18MV

CLOSED CIRCUIT 5MV

•VENT SAFETY SWITCH TIGHT AND NO SHORTS

(FOR UNITS EQUIPPED WITH VENT SAFETY SWITCH)

▼

MAIN BURNER ON

NO

▼

•REMOTE SYSTEM ON

•REMOTE SYSTEM WIRE SHORTING OUT

•MINIMUM MILLIVOLT: OPEN CIRCUIT 300MV CLOSED CIRCUIT 165MV

•FLAME ENGULFING THERMOPILE/THERMOCOUPLE

•VALVE IS IN ON POSITION