Monessen Hearth MJ27NR, MJ27PR operating instructions Troubleshooting, goes out when control

Models: MJ27NR MJ27PR

1 40
Download 40 pages 38.77 Kb
Page 34
Image 34
goes out when control

TROUBLESHOOTING

WARNING

If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfire when lit. If the gas quality or pressure is low, contact your local gas supplier immediately.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

ODS/pilot lights, but flame

1.

Control knob not fully pressed in.

1.

Press in control knob fully.

goes out when control

2.

Control knob not pressed in long

2.

After ODS/pilot lights, keep control knob

knob is released.

 

enough.

 

pressed in for 30 seconds.

 

 

 

 

 

 

3.

Manual shutoff valve not fully open.

3.

Fully open manual shutoff valve.

 

4.

Thermocouple connection loose at

4.

Hand tighten thermocouple connection

 

 

control valve.

 

until snug, then tighten 1/4 turn more.

 

5.

Pilot flame not touching thermocouple,

5.

Contact local gas company.

 

 

which allows thermocouple to cool,

 

 

 

 

causing pilot flame to go out. This

 

 

 

 

problem could be caused by either

 

 

 

 

low gas pressure, or a dirty or partially

 

 

 

 

clogged ODS/pilot.

 

 

 

6.

Thermocouple damaged.

6.

Replace thermocouple.

 

7.

Control valve damaged.

7.

Replace control valve.

Burner does not light after

1.

Burner orifice is clogged.

1.

Burner orifice is clogged.

ODS/pilot is lit.

2.

Burner orifice diameter is too small.

2.

Burner orifice diameter is too small.

 

3.

Inlet gas pressure is too low.

3.

Inlet gas pressure is too low.

Burner backfires during

1. Manifold pressure is too low.

1.

Contact local gas company.

combustion

2.

Burner orifice is clogged.

2.

Clean burner or replace burner orifice.

Slight smoke or odor

1.

Burner orifice is clogged or damaged.

1.

Clean burner or replace burner orifice.

during initial operation.

2. Burner is damaged.

2.

Replace burner.

 

3.

Gas regulator defective.

3.

Replace gas regulator.

Logs appear to smoke

1.

Vapors from paint or curing process of

1.

Problem will stop after a few hours of

after initial operation.

 

logs.

 

operation. Run the heater with the damper

 

 

 

 

open if you have one, or open a window

 

 

 

 

for the first few hours.

 

 

 

2.

Log heater is intended to be smokeless.

 

 

 

 

Turn OFF heater and call qualified service

 

 

 

 

person.

H e a t e r p r o d u c e s a

1. Turning control knob to HIGH position

1.

Turn control knob to LOW position and let

whistling noise when

 

when burner is cold.

 

warm up for a minute.

burner is lit.

2.

Air in gas line.

2.

Operate burner until air is removed from

 

 

 

 

line. Have gas line checked by local gas

 

 

 

 

company.

 

3.

Dirty or partially clogged burner orifices.

3.

Clean burner or replace burner orifice.

No gas to pilot.

1.

LP-regulator shut down due to inlet

1.

Verify LP tank regulator is installed and

 

 

pressure too high.

 

set at 11" to 13" w.c.

 

 

 

2.

Replace regulator on heater.

34

86D0024

Page 34
Image 34
Monessen Hearth MJ27NR, MJ27PR operating instructions Troubleshooting, goes out when control