Vermont Casting DBR33 Trouble Shooting the GAS Control System, SIT 820 Nova Millivolt Valve

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TROUBLE SHOOTING THE GAS CONTROL SYSTEM

SIT 820 NOVA MILLIVOLT VALVE

GLASS DOOR TO BE REMOVED BEFORE SERVICE WORK

START

GAS SUPPLY ON

CHECK

NO

 

• SHUTOFF VALVE OPEN

 

 

• CONFIRM GAS HOOK-UP

 

 

LIGHT PILOT WITH

PIEZO IGNITION

YES

NO

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

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Contents Builder Rear Vent Direct Vent Table of Contents Installation Instructions Locating Your GAS FireplaceFireplace Dimensions DBR33Mantels Mantel Chart Clearance to CombustiblesFraming and Finishing Final Finishing GAS SpecificationsHearth GAS Line Installation Remote Switch Installation For RN/RPCrimped END Pipes Twist Lock PipesGeneral Venting Information Termination Clearances Rear Venting ApplicationsRear Wall Installations StepVertical Sidewall Applications HOW to USE the Vent Graph Vertical Sidewall Venting GraphVertical Sidewall Installation Vent Opening Noncombustible WallAlways install horizontal venting on a level plane Below Grade Installations Vertical Through Roof ApplicationsVertical Thru the Roof Installation Louvre Removal Glass CleaningGeneral Glass Information Glass Frame RemovalFlame Adjustment Installation of LogsEmber Material Placement Lava RockCleaning the Standing Pilot Control System Flame CharacteristicsMaintenance Inspecting the Venting SystemLighting and Operating Instructions Trouble Shooting the GAS Control System SIT 820 Nova Millivolt ValveHoneywell Millivolt Valve Replacement Parts List Rear Builder Series Replacement Parts Rear Builders Series Wiring Instructions Optional FAN KIT FK12 and FK24Optional BAY Window Installation Optional EB1 Receptacle Hook-UpOptional Ceramic Refractory Installation Optional Screen KIT InstallationOptional Remote Control Crimped Ends Venting Components Twist Lock Venting Components Page Limited Warranty & Extended Life Time Protection