Monessen Hearth MDV500, MDV600 Installation & Operating Instructions Manual page 51

trouBleshootIng
standIng pIlot IgnItIon
symptom
4. Frequent pilot
outage problem.
5. The pilot and main
burner extinguish
while in operation
6. Glass Soots
7. Flame burn blue
and lifts off burner
(ghosting)
75D2523
possIBle cause
A. Pilot flame may be too high
or too low, causing pilot
safety to drop out
A. Inner vent pipe leaking
exhaust gases back into
system
B. Horizontal vent improperly
pitched
C. Improper vent cap installa-
tion
A. Flame impingement on logs
A. Insufficient oxygen being
supplied
MDV Series Direct Vent Gas Fireplace
actIon
A. Clean and adjust the pilot flame for maximum flame
impingement on thermocouple.
A. Check for flue product leak. Replace defective pipe
section.
B. Check horizontal-venting piping is running upward 1/4"
per foot. Do not run the pipe level or downward.
C. Check for proper installation and freedom from debris
or blockage.
A. Install log set per the instructions
Inspect the injector and air intake area. Make sure
this area does not have any blockage from debris and
clean.
Check gas supply.
A. Ensure that the vent cap is installed properly and free
of debris. Ensure that the vent system joints are tight
and have no leaks. Ensure that no debris has been
blocking the inner air intake at the bottom back of the
combustion chamber. Ensure that the glass is properly
secure and latch.
51