18
Majestic Fireplaces
©
NVCR Series B-Vent
20001315
• Line voltage (120VAC)
• Low voltage transformer
(19.5 minimum VAC)
• ON/OFF Switch
• Wiring connections
• Thermodisk
Unplug ignition lead and check spark at
module
(24VAC nominal)
Troubleshooting
Remove glass panel before servicing.
• Turn gas supply OFF
• Turn ON/OFF switch to call
for heat
Power to Module
(24V nominal)
Spark across ignitor sensor gap
YES
Turn gas ON
Pilot burner lights?
YES
Spark stops when pilot is lit?
YES
Main burner lights?
YES
System runs until ON/OFF
switch is in “OFF” position
YES
Troubleshooting ends
Spark OK?
•
Check ignition cable, ground wiring, ceramic insulator and gap. Correct as neces-
sary.
•
Check boot of ignition cable for signs of melting or buckling. Take protective action
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-MV/PV terminals on module if voltage is okay. Re-
place 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 and 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-MV/PV terminals, if not 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, shutdowns 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 checksare okay, replace module.
YES
START
Replace module
CHECK
Nova SIT 822 with Honeywell S8600 B Electronic Ignition
NO
NO
NO
NO
NO
NO
NO
YES
f i r e - p a r t s . c o m
