Monessen Hearth DFX24C Troubleshooting, Observed Problem Possible Cause Remedy

Page 27

TROUBLESHOOTING

DFX & DBX Series Vent Free Fireplaces

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 knob is

2. Control knob not pressed in long

2.

After ODS/pilot lights, keep control

released.

 

enough.

 

knob pressed in for 30 seconds.

 

3.

Manual shutoff valve not fully open.

3.

Fully open manual shutoff valve.

 

4.

Thermocouple connection loose at control

4.

Hand tighten thermocouple connec-

 

 

valve.

 

tion until snug, then tighten 1/4 turn

 

 

 

 

more.

 

5.

Pilot flame not touching thermocouple,

5a.Contact local gas company.

 

 

which allows thermocouple to cool, caus-

5b.Clean pilot with vacuum cleaner.

 

 

ing pilot flame to go out. This problem could

 

 

 

 

be caused by either low gas pressure, or a

 

 

 

 

dirty or partially clogged ODS/pilot.

6.

Replace thermocouple.

 

6.

Thermocouple damaged.

 

7.

Control valve damaged.

7.

Replace control valve.

 

 

 

 

 

Burner does not light after ODS/

1.

Burner orifice is clogged.

1.

Clean orifice.

pilot is lit.

2.

Burner orifice diameter is too small.

2.

Replace burner orifice.

 

3.

Inlet gas pressure is too low.

3.

Contact qualified service person.

 

 

 

 

Burner backfires during com-

1. Manifold pressure is too low.

1.

Contact local gas company.

bustion.

2.

Burner orifice is clogged.

2.

Clean burner or replace burner ori-

 

 

 

 

fice.

Slight smoke or odor during

1. Burner orifice is clogged or damaged.

1.

Clean burner or replace burner ori-

initial operation.

2.

Burner is damaged.

 

fice.

 

3.

Gas regulator defective.

2.

Replace burner.

 

 

 

3.

Replace gas regulator.

Logs appear to smoke after initial operation.

1.Vapors from paint or curing process of logs.

2.Vapors or smoke continue after heater has run with damper or window open for several hours.

1.Problem will stop after a few hours of 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 smoke- less. Turn OFF heater and call quali- fied service person.

Heater produces a whistling 1.

Turning control knob to HIGH position

noise when burner is lit.

when burner is cold.

2.

Air in gas line.

3. Dirty or partially clogged burner orifices.

1.Turn control knob to LOW position and let warm up for a minute.

2.Operate burner until air is removed from line. Have gas line checked by local gas company.

3.Clean burner or replace burner ori- fice.

No gas to pilot.

1. LP-regulator shut down due to inlet pres-

 

sure too high.

1.Verify LP tank regulator is installed and set at 11" to 13" w.c.

2.Replace regulator on heater.

33D4047

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Contents Do not try to light any appliance What to do if YOU Smell GASDFX & DBX Series Vent Free Fireplaces Important Safety Information InstallerOwner Codes Important Safety InformationProduct Features DFX24C/DBX24C DFX32C Fireplace and Framing DimensionsGetting Started Preinstallation informationCombustion and Ventilation AIR Adequate Combustion and Ventilation AIRFireplace Installation Do not Install this Model in a Bedroom or BathroomFireplace Location Fireplace Installation DFX24C DBX24C DFX32C Fireplace must be installed giving fullConsideration to the clearance and height Requirements identified in this manualRemove Grate Securing Heater to Floor or HearthMin Manual Control Thermostat ControlMillivolt Control Connecting Optional Wall Switch Electrical InstallationConnect Remote Receiver Check System OperationHAND-HELD Remote Instructions Supplied with the Remote Final Installation Install CanopyRemove Screen DFX24C log placement LOG PlacementDFX32C Log placement DBX24C Log placementPlacE rock wool Manual & HI/LO Control Check the pilot flameFlame Appearance Checking burner flameOperating Instructions For your safety read before lightinG Operating Instructions Manual control lighting instructionsThermostatIC control lighting instructions Millivolt control lighting instructions Cleaning and Servicing Operating Instructions and MaintenanceScreen Removed Observed Problem Possible Cause Remedy TroubleshootingDFXC/DBXC Firebox Parts DFX24C Millivolt & Manual Control Burner Parts Replacement PartsDFX32C Millivolt Burner Parts Replacement PartsDBX24C T-STAT Burner Parts Brass Louvers FirebricksForced Air Kit Optional Accessories Installing optional FIREbrick panelsDFX24C/DBX24C Secure Corners Slide Assembled Trim Over Top of Heater If Warranty Service is Needed Lifetime WarrantyFive Year Warranty Basic Warranty
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DFX24C specifications

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