Desa CDR3924NT installation manual Maintenance

Page 21

TROUBLESHOOTING

Continued

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

2.

After ODS/pilot lights, keep

released

 

long enough

 

control knob pressed in 30

 

 

3.

Safety interlock system has

 

seconds

 

 

3.

Wait one minute for safety

 

 

 

been triggered

 

interlock system to reset.

 

 

4.

Equipment shutoff valve not

 

Repeat ignition operation

 

 

4.

Fully open equipment shutoff

 

 

 

fully open

 

valve

 

 

5.

Pilot flame not touching

5.

A) Contact local natural or

 

 

 

thermocouple, which allows

 

propane/LP gas company

 

 

 

thermocouple to cool, caus-

 

 

 

 

 

 

ing pilot flame to go out. This

 

B) Clean ODS/pilot (see

 

 

 

problem could be caused by

 

Cleaning and Maintenance,

 

 

 

one or both of the following:

 

page 19) or replace ODS/pilot

 

 

 

A) Low gas pressure

 

assembly

 

 

 

B) Dirty or partially clogged

 

 

 

 

 

 

ODS/pilot

 

 

 

 

 

6.

Thermocouple connection

6.

Hand tighten until snug, then

 

 

 

loose at control valve

 

tighten 1/4 turn more

 

 

7.

Thermocouple damaged

7.

Replace pilot assembly

 

 

8.

Control valve damaged

8.

Replace control valve

 

 

 

 

 

One or more burners do not light

1. Inlet gas pressure is too low

1.

Contact local natural or pro-

after ODS/pilot is lit

2.

Burner orifice(s) clogged

 

pane/LP gas company

 

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

 

and Maintenance, page 19) or

 

 

3.

Mislocated crossover tube

 

replace burner orifice(s)

 

 

3.

Contact qualified service

 

 

 

 

 

person

 

 

 

 

 

Delayed ignition of one or more

1. Manifold pressure is too low

1.

Contact local natural or pro-

burners

2.

Burner orifice(s) clogged

 

pane/LP gas company

 

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

 

and Maintenance, page 19) or

 

 

 

 

 

replace burner orifice(s)

 

 

3.

Mislocated crossover tube

3.

Contact qualified service

 

 

 

 

 

person

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 19)

 

 

 

 

 

or replace burner orifice

 

 

2.

Damaged burner

2.

Replace damaged burner

 

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

 

 

 

Yellow flame in burner during

1. Not enough air

1.

Check burner(s) for dirt

burner combustion

 

 

 

and debris. If found, clean

 

 

 

 

 

burner(s) (see Cleaning and

 

 

2.

Gas regulator defective

 

Maintenance, page 19)

 

 

2.

Replace gas regulator

113183-01B

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Contents Thermostat Models CDR3924NT and CDR3924PT What to do if YOU Smell GASTable of Contents Safety Information Local Codes Product Identification Product FeaturesDetermining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationUnusually Tight Construction Confined and Unconfined SpaceVentilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Check GAS Type InstallationLog Installation and Clearances for VENT-FREE OperationRear WidthMantel Clearances Determining Minimum Mantel Clearance When Using a HoodFloor Clearances Determining Minimum Mantel ClearanceInstallation Items Needed Installing Heater Base AssemblyExternal Regulator With Vent Pointing Down Connecting to GAS SupplyPropane/LP From Checking GAS ConnectionsNatural From Gas Test Pressures In Excess Of 1/2 Psig 3.5 kPaTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Installing LogsAdding Lava Rock Attaching Grate to Base AssemblyFor Your Safety Read Before Lighting Operating HeaterLighting Instructions Manual Lighting Procedure To Turn OFF GAS To ApplianceThermostat Control Operation Inspecting Burners Technical ServicePilot Flame Pattern Burner Flame PatternsCleaning Maintenance Burner Injector Holders and Pilot AIR Inlet HolesLogs Observed Problem Possible Cause Remedy TroubleshootingMaintenance, Cold Minute Air in gas line Operate burners until air is Gas leak. See Warning For Masonry and FACTORY- Built Metal Fireplace Optional Positioning Thermostat Sensing BulbReplacement Parts SpecificationsService Hints AccessoriesModels CDR3924PT and CDR3924NT Illustrated Parts BreakdownParts List Warranty Information Keep this WarrantyLimited Warranty Comfort Glow VENT-FREE GAS LOG Heaters