Monessen Hearth HBDV400N/PV7 User Manual

49

4.  Frequent pilot 

outage problem. 

5.  The pilot and main 

burner extinguish 
while in operation 

6.  Glass Soots 

7.  Flame burns blue 

and lifts off burner 
(ghosting)

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 

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.