Desa CGB3930NRA, CGD3924NRA Unvented Natural GAS LOG Heater Troubleshooting, Maintenance

Page 20

UNVENTED NATURAL GAS LOG HEATER

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Burner does light after ODS/pilot is lit

1.

Burner orifice clogged

1.

Clean burner (see Cleaning and Mainte-

 

 

 

 

nance, page 18) or replace burner orifice

 

2.

Inlet gas pressure is too low

2.

Contact local natural gas company

 

3.

Burner orifice diameter is too small

3.

Replace burner orifice

 

4.

Thermopile leads disconnected or im-

4.

Reconnect leads (see Wiring Diagram,

 

 

properly connected

 

page 27)

 

5.

Burners will not come on in remote

5.

Replace battery in transmitter and receiver

 

 

position

 

 

 

 

 

 

 

Delayed ignition burner

1.

Manifold pressure is too low

1.

Contact local natural gas company

 

2.

Burner orifice clogged

2.

Clean burner (see Cleaning and Mainte-

 

 

 

 

nance, page 18) or replace burner orifice

 

 

 

 

 

Burner backfiring during combustion

1.

Burner orifice is clogged or damaged

1.

Clean burner (see Cleaning and Mainte-

 

 

 

 

nance, page 18) or replace burner orifice

 

2.

Damaged burner

2.

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas control

 

 

 

 

 

Slight smoke or odor during initial operation

1.

Not enough air

1.

Check burner for dirt and debris. If

 

 

 

 

found, clean burner (see Cleaning and

 

 

 

 

Maintenance, page 18)

 

2.

Gas regulator defective

2.

Replace gas control

 

3.

Residues from manufacturing processes

3.

Problem will stop after a few hours of

 

 

and logs curing

 

operation

 

 

 

 

 

Moisture/condensation noticed on windows

1.

Not enough combustion/ventilation air

1.

Refer to Air for Combustion and Venti-

 

 

 

 

lation requirements (page 4)

 

 

 

 

 

Heater produces a whistling noise when

1.

Turning control knob to HI position

1.

Turn control knob to LO position and

burner is lit

 

when burner is cold

 

let warm up for a minute

 

2.

Air in gas line

2.

Operate burner until air is removed from

 

 

 

 

line. Have gas line checked by local

 

 

 

 

natural gas company

 

3.

Air passageways on heater blocked

3.

Observe minimum installation clear-

 

 

 

 

ances (see pages 7 through 9)

 

4.

Dirty or partially clogged burner orifice

4.

Clean burner (see Cleaning and Mainte-

 

 

 

 

nance, page 18) or replace burner orifice

White powder residue forming within burner box or on adjacent walls or furniture

1.When heated, vapors form furniture pol- ish, wax, carpet cleaners, etc. turn into white powder residue

1.Turn heater off when using furniture polish, wax, carpet cleaners or similar products

Remote does not function

1. Battery is not installed. Battery power

 

is low

1.Replace 9-volt batteries in receiver and remote control

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Contents Remote Ready What to do if YOU Smell GASUnvented Natural GAS LOG Heater Safety Information Product Features Remote Control AccessoriesProduct Identification Local CodesConfined Space and Unconfined Space Providing Adequate VentilationUnusually Tight Construction Determining if You Have a Confined or Unconfined Space AIR for Combustion VentilationDetermining FRESH-AIR Flow for Heater Location Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Installation Check GAS TypeMinimum Fireplace Clearance to Combustible Materials LOG Sizing RequirementsUnvented Natural GAS LOG Heater Installation Minimum Noncombustible Material ClearancesDetermining Minimum Mantel Clearances When Using a Hood Mantel ClearancesFloor Clearances Determining Minimum Mantel ClearancesInstallation Items Needed Installing Damper Clamp Accessory for Vented OperationInstalling Heater Base Assembly Connecting to GAS Supply Attaching Flexible Gas Hose to HeaterInstalling Remote RE- Ceiver Unit Checking GAS ConnectionsInstalling 9-Volt Battery in Receiver Installing Wireless Remote Control AccessoryInstalling Logs CGD3924NRA Installing Logs on Models CGB3924PRA and CGB3930PRA Tered over the burner U bendLighting Instructions For Your Safety Read Before LightingOperating Heater Manual Lighting Procedure Unvented Natural GAS LOG Heater OperatingTo Turn OFF GAS To Appliance Optional Remote OperationMain Burner Inspecting BurnersPilot Flame Pattern Unvented Natural GAS LOG Heater Cleaning and Maintenance Service HintsTechnical Service Cleaning Burner Injector Holder and Pilot AIR Inlet HoleTroubleshooting Observed Problem Possible Cause RemedyUnvented Natural GAS LOG Heater Troubleshooting Maintenance,Gas leak. See Warning statement at Unvented Natural GAS LOG Heater Illustrated Parts Breakdown CGD3924NRAParts List KEY Part Number Description QTYCGB3924NRA CGB3930NRA KEY CGB3924NRA CGB3930NRA Part Number Description QTY Unvented Natural GAS LOG Heater Replacement Parts Parts Under WarrantyParts not Under Warranty Parts CentralWiring Diagram AccessoriesSpecifications Warranty Information