Troubleshooting - Real Flame PYROTECH SPACE HEATER Installation & Operating Manual

TROUBLESHOOTING THE MILLIVOLT GAS SYSTEM CONTROL
IMPORTANT
Valve system troubleshooting should only be carried out by a qualified service technician.
If supply cord is damaged or the unit needs repairing, it shall be repaired by the manufacturer or
its service agent or similarly qualified person in order to avoid a hazard.
Symptom
Spark ignitor will not
light pilot after
repeated triggering
of igniter button
Pilot will not stay lit
after carefully
following the
lighting instruction
Pilot burning, no
gas to burner, valve
knob "ON", Wall
switch "ON"
Frequent
pilot/burner outage
Possible Cause
A. Defective ignitor
B. Defective or
misaligned electrode at
pilot (spark at electrode).
C. Gas supply pressure
errant.
D. Pilot orifice plugged.
A. Defective pilot
generator (thermocouple)
A. Wall switch or wires
defective.
B. Thermopile may not
be generating sufficient
millivoltage.
C. Blocked burner orifice.
A. Pilot flame may be to
low or blowing (High)
causing the pilot/valve
safety to drop out.
Corrective Action
Check for spark at electrode and pilot. If no spark and
electrode wire is properly connected, replace ignitor
Using a match, light the pilot. If pilot lights, turn off pilot
and trigger the igniter button again. If pilot lights, an
improper gas mixture caused the bad lighting and a longer
purge period is recommended. If pilot will not light - check
gap at electrode and pilot - should be 1/8" to have a strong
spark. If gap measures 1/8", replace pilot.
Check inlet gas pressure. It should be :
• 0.90 kpa for Natural Gas
• 2.54 kpa for L.P .G.
Refer Data information plate.
Clean or replace pilot orifice.
Check pilot flame, it must impinge on thermocouple. Clean
and/or adjust pilot for maximum flame impingement on the
thermocouple. Ensure that the connection between the
valve and the thermocouple is tight and secure.
Check wall switch and wires for proper connections.
Jumper wires across terminals at wall switch, if burner
comes on, replace defective wall switch. If okay, jumper
across wall switch wires at valve, if burner comes on wires
are faulty or connections are bad.
Check thermopile with millivolt meter. Take reading at
thermopile terminals of gas valve. Should read 325
millivolts minimum with optional wall switch "OFF". Replace
faulty thermopile if reading is below specified minimum.
Check burner orifice for blockage and remove.
Clean and/or adjust pilot flame for maximum flame
impingement on thermocouple.
17