Vermont Casting DVT38S2 - Manual (Page 31)

31
Chateau™ Decorative Gas Appliance
20009543
SIT 822 Valve with a Honeywell Electronic Ignitor
Troubleshooting the Gas Control System
START
• Turn Gas Supply Off
• Turn On/Off Switch
To Call For Heat "on"
Power To Module
(24V Normal)
Spark Across
Ignitor Sensor Gap
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• Turn Gas On
Pilot Burner Lights?
Spark Stops When
Pilot Is Lit?
Main Burner Lights?
System Runs Until
On/Off Switch Is In
"Off" Position
Troubleshooting
Ends
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• • NO
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Check: • Line Voltage (120vac)
• Low Voltage Transformer
(19.5 Minimum Vac)
• On/off Switch
• Wiring Connections
Unplug Ignition Lead
and Check Spark
At Module
(24Vac Normal)
Spark OK?
• Replace Module
• Check Ignition Cable Ground Wiring, Ceramic Insulator
And Gap. Correct As Necessary
• Check Boot Of Ignition Cable For Signs Of Melting Or
Buckling. Take Protective Action To Shield
Cable And Boot From Excessive Temperatures.
• Check That All Manual Gas Valves Are Open, Supply Tubing
And Pressures Are Good, And Pilot Burner Orifice
Is Not Blocked.
• Check Electrical Connections Between Module And
Pilot Operator On Gas Control.
• Check For 24vac Across Pv-mvpv Terminals On Module If
Voltage Is Okay, Replace Gas Control If Not, Replace
Module.
NOTE: If S8600B Goes Into Lockout, Reset System.
• Check Continuity Of Ignition Cable And Ground Wire.
• Clean Flame Rod
• Check Electrical Connections Between Flame Rod & Module.
• Check For Cracked Ceramic Flame Rod Insulator.
• Check That Pilot Flame Covers Flame Rod And Is Steady Blue
• Adjust Pilot Flame.
• If Problem Persists, Replace Module.
• Check For 24vac Across Mv-mvpv Terminals If No
Voltage, Replace Module.
• Check Electrical Connections Between Module And Gas
Control. If Okay, Replace Gas Control, Or Gas Control
Operator.
NOTE: If S8600B Goes Into Lockout, Reset System
• Check For Continuity Of Ignition Cable And Ground Wire.
Note: If Ground Is Poor Or Erratic, Shutdown May Occur
Occasionally Even Though Operation Is Normal At The Time
Of Checkout.
• Check That The Pilot Flame Covers Flame Rod And Is Steady
And Blue.
• If Checks Are Okay, Replace Module.
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YES