TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

ODS/pilot lights but flame

1. Pilot knob not fully pressed in

1.

Press in pilot knob fully

goes out when control knob is

2. Pilot knob not pressed in long

2. After ODS/pilot lights, keep pi-

released

 

enough

 

lot knob pressed in 30 seconds

 

3.

Equipment shutoff valve not

3.

Fully open equipment shutoff

 

 

fully open

 

valve

 

4.

Thermocouple connection

4.

Hand tighten until snug, then

 

 

loose at control valve

 

tighten 1/4 turn more

 

5.

Pilot flame not touching ther-

5.

A) Contact local natural or

 

 

mocouple, which allows ther-

 

propane/LP gas company

 

 

mocouple to cool, causing

 

B) Clean ODS/pilot (see

 

 

pilot flame to go out. This

 

Cleaning and Maintenance,

 

 

problem could be caused by

 

page 16) or replace ODS/pilot

 

 

one or both of the following:

 

assembly

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged

 

 

 

 

ODS/pilot

 

 

 

6.

Thermocouple damaged

6.

Replace pilot assembly

 

7.

Valve damaged

7.

Replace valve

 

 

 

 

Burner(s) does not light after

1. Burner orifice(s) is clogged

1.

Clean burner orifice(s) (see

ODS/pilot is lit

 

 

 

Cleaning and Maintenance, page

 

 

 

 

16) or replace burner orifice(s)

 

2.

Inlet gas pressure is too low

2.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

Delayed ignition of burner(s)

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

2.

Burner orifice(s) is clogged

2.

Clean burner orifice(s) (see

 

 

 

 

Cleaning and Maintenance, page

 

 

 

 

16) or replace burner orifice(s)

 

 

 

 

Burner backfiring during com-

1. Burner orifice(s) is clogged or

1.

Clean burner orifice(s) (see

bustion

 

damaged

 

Cleaning and Maintenance, page

 

2.

Burner damaged

 

16) or replace burner orifice(s)

 

2.

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

 

 

 

 

Burner plaque(s) does not glow

1. Plaque damaged

1.

Replace burner

 

2.

Inlet gas pressure is too low

2.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

Slight smoke or odor during

1. Residues from manufacturing

1.

Problem will stop after a few

initial operation

 

processes

 

hours of operation

 

 

 

 

Heater produces a clicking/tick-

1. Metal expanding while heating

1.

This is common with most heat-

ing noise just after burner is lit

 

or contracting while cooling

 

ers. If noise is excessive, contact

or shut off

 

 

 

qualified service person

18

www.desatech.com

113261-01A

Page 18
Image 18
Desa CTR22PR ODS/pilot lights but flame, Press in pilot knob fully, Goes out when control knob is, Released Enough

CTR25NR, CTR22PR, VTN25R, VTP22R specifications

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