TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is re- leased

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Equipment shutoff valve not fully open

4.Pilot flame not touching thermocouple, which allows thermocouple to cool, caus- ing 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

5.Thermocouple connection loose at control valve

6.Thermocouple damaged

7.Control valve damaged

1.Press in control knob fully

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

3.Fully open equipment shutoff valve

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

B)Clean ODS/pilot (see Cleaning and Maintenance, page 23) or replace ODS/pilot assembly

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

6.Replace pilot assembly

7.Replace control valve

One or both 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 23) or

 

3.

Mislocated crossover tube

 

replace burner orifice(s)

 

3.

Contact qualified service person

 

4.

Remote selector in OFF

4.

Put remote selector in ON

 

 

position

 

position

 

5.

Wire disconnected from gas

5.

See Wiring Diagram, page 28

 

 

control

 

 

 

 

 

 

Delayed ignition burner

1. Manifold pressure is too

1.

Contact local natural or pro-

 

 

low

 

pane/LP gas company

 

2.

Burner orifice clogged

2.

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 23) or

 

 

 

 

replace burner orifice

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 23) 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

1. Not enough air

1.

Check burner for dirt and

operation

 

 

 

debris. If found, clean burner

 

 

 

 

(see Cleaning and Mainte-

 

2.

Gas regulator defective

 

nance, page 23)

 

2.

Replace gas control

 

3.

Residues from manufacturing

3.

Problem will stop after a few

 

 

processes and logs curing

 

hours of operation

112882-01D

www.desatech.com

25

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Image 25
Desa VGL18NRA, VGL18PRA, VGL24NRA, VGL24PRA, VGL30NRA, VGL30PRA installation manual See Cleaning and Mainte

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