Troubleshooting Nova SIT 820 Standing Pilot START CHECK
Gas supply
connected
Gas Supply
On Shut off valve open
N
o
Lockout has engaged.
Wait 60 seconds and try
again.
Piezo not tight enough
for good ground.
Y
es
For spark at electrode
while depressing Piezo
1/8” gap to pilot hood
required.
Gas Supply
On N
o
All wiring connections.
Replace Piezo ignitor.
Thermodisk.
Y
es
Pilot Stays
Lit
Y
es
Pilot Lights
Main Burner
Y
es
System OK
N
o
Air in gas pipe.
Thermopile requires a
min of 325Mv. Adjust
pilot flame height.
All wiring connections.
Replace thermopile.
Thermocouple needs a
min of 14mV
Defective valve. Turn to
pilot, meter should read
greater than 100Mv.
Thermodisk.
N
o
Faulty gas valve.
Thermopile requires
min of 325mV
Watch for grounded
wires.
Blocked burner
injector.
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