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Troubleshooting
Nova SIT 820 Valve (‘R’ series)
• Supply line hooked up
• Shutoff valve open
• Lockout has engaged. Wait 60 seconds
and try again
• Piezo nut tight for good ground
• For spark at electrode while depressing
piezo (red button) - 1/8" gap to pilot hood
needed
• All wiring connections
• Replace piezo ignitor
• For air in the lines
• Thermopile needs a minimum of 325mV.
Adjust pilot flame height.
• All wiring connections
• Replace Thermopile
• Thermocouple needs a minimum of 14mV.
• Defective valve. Turn to pilot, meter should
read greater than 100mV. If not, replace the
valve.
• Valve turned on
• Wall switch is not turned on. Watch for
grounded wires.
• Thermopile needs a minimum of 325mV.
• Plugged burner
Gas Supply On
Pilot lights with Piezo
Ignitor
Pilot stays lit
Pilot lights main
burner
System OK
START
CHECK
NO
NO
NO
YES
YES
YES
YES
NO