TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is released

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Safety interlock system has been triggered

4.Equipment shutoff valve not fully open

5.Pilot flame not touching ther- mocouple, which allows ther- mocouple to cool, causing pilot flame to go out. This problem could be caused by one or both of the following:

A)Low gas pressure

B)Dirty or partially clogged ODS/pilot

6.Thermocouple connection loose at control valve

7.Thermocouple damaged

8.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep control knob pressed in 30 seconds

3.Wait one minute for safety in- terlock system to reset. Repeat ignition operation

4.Fully open equipment shutoff valve

5.A) Contact local natural or propane/LP gas company

B)Clean ODS/pilot (see Cleaning and Maintenance, page 28) or replace ODS/pilot assembly

6.Hand tighten until snug, then tighten 1/4 turn more

7.Replace pilot assembly

8.Replace control valve

Burner does not light after 1. Inlet gas pressure is too low

ODS/pilot is lit

 

2.

Burner orifice is clogged

3.

Thermopile leads disconnected

 

or improperly connected (Re-

 

mote-Ready Models Only)

4.

Burners will not come on in re-

 

mote position (Remote-Ready

 

Models Only)

1.Contact local natural or pro- pane/LP gas company

2.Clean burner (see Cleaning and Maintenance, page 28) or replace burner orifice

3.Reconnect leads (see Wiring Diagram, page 29)

4.Replace battery in transmitter and receiver

Delayed ignition of burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

 

2.

Burner orifice is clogged

 

pane/LP gas company

 

 

2.

Clean burner (see Cleaning

 

 

 

 

 

and Maintenance, page 28)

 

 

 

 

 

or replace burner orifice

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 28)

 

 

2.

Damaged burner

 

or replace burner orifice

 

 

2.

Replace damaged burner

 

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

4.

Inlet gas pressure is too low

4.

Contact local natural or pro-

 

 

 

 

 

pane/LP gas company

111244-01F

www.desatech.com

31

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Image 31
Desa CDCFPR, CDCFTNA, CDCFTPA installation manual Burner orifice is clogged, Mote-Ready Models Only, Or replace burner orifice

CDCFTNA, CDCFPR, CDCFTPA specifications

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