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PYROMASTER@ UVHB26 Vent-free Heaters
TKOUBLESUOOTING. Uoneywell VS8421
START
-NO
CHECK
.SUPPLY LINE HOOKED UP
.SHUTOFF VALVE OPEN
YES
~
.LOCKOUT HAS ENGAGED. WAIT
60 SECONDS AND TRY AGAIN.
.FORSPARKATELECTRODE
WHILE DEPRESSING PIElO
1/8" GAP TO PILOT HOOD
NEEDED.
.ALL WIRING CONNECTIONS
.REPLACE PIElO IGNITOR
PILOT LIGHTS WITH I- NO
PIElO IGNITOR
YES
PILOT STAYS LIT -NO-.
.FOR AIR IN THE LINES
.THERMOPILE NEEDS A
MINIMUM325mV. ADJUST
PILOT FLAME HEIGHT.
.ALLWIRING CONNECTIONS.
.REPLACE THERMOPILE
.THERMOCOUPLE NEEDS A
MINIMUMOF 14mV.
.DEFECTIVE VALVE. TURN TO
PILOT, METER SHOULD READ
GREATER THAN 100 mV. IF
NOT, REPLACE.
YES
PilOT LIGHTSMAIN I-NO-.
BURNER
.VALVE IS TURNED ON
. WAll SWITCH IS NOT
TURNED ON. WATCH
FOR GROUNDED WIRES!
.THERMOPilE NEEDS A
MINIMUM325mV.
.PLUGGED BURNER ORIFICE.
YES
I SYSTEM lK:
15