TROUBLE-

SHOOTING

Continued

26

OBSERVED

POSSIBLE

 

 

PROBLEM

CAUSE

REMEDY

 

 

 

 

 

Burner backfiring

1.

Burner orifice is

1.

Clean burner (see

during combustion.

 

clogged or damaged.

 

Cleaning and Mainte-

 

 

 

 

nance, page 23) or

 

 

 

 

replace burner orifice

 

 

 

 

(see Changing Burner

 

 

 

 

Orifice, page 30).

 

2.

Burner damaged.

2.

Replace burner.

 

3.

Gas regulator defective.

3.

Replace control valve.

 

4.

Delayed ignition.

4.

See above.

 

 

 

 

 

Yellow flame during

1.

Not enough air.

1.

Check burner for dirt

burner combustion.

 

 

 

and debris. If found,

 

 

 

 

clean burner (see

 

 

 

 

Cleaning and Mainte-

 

 

 

 

nance, page 23).

 

2.

Gas regulator defective.

2.

Replace control valve.

 

 

 

 

Slight smoke or odor

1. Residues from manu-

1.

Problem will stop after a

during initial opera-

 

facturing processes.

 

few hours of operation.

tion.

 

 

 

 

 

 

 

 

 

Burner fails to

1.

Pilot flame not lit.

1.

Light pilot burner (see

respond to thermo-

 

 

 

Lighting Instructions,

stat.

 

 

 

page 18).

 

2.

Pilot flame not prop-

2.

Pilot flame needs

 

 

erly heating end of

 

adjusting. Contact a

 

 

thermocouple.

 

qualified service person.

 

3.

Pilot burner orifice

3.

Clean pilot burner (see

 

 

clogged or damaged.

 

Cleaning and Mainte-

 

 

 

 

nance, page 23).

 

4.

Control valve defec-

4.

Replace control valve.

 

 

tive.

 

 

 

5.

Temperature at ther-

 

 

 

 

mostat bulb satisfied.

 

 

 

 

 

 

 

Heater produces a

1.

Air in gas line.

1.

Operate burner until air

whistling noise when

 

 

 

is removed from line.

burner is lit.

 

 

 

Have gas line checked

 

 

 

 

by local natural gas

 

 

 

 

company.

 

2.

Air passageways on

2.

Observe minimum

 

 

heater blocked.

 

installation clearances

 

 

 

 

(see Figure 3, page 7).

 

3.

Dirty or partially

3.

Clean burner (see

 

 

clogged burner orifice.

 

Cleaning and Mainte-

 

 

 

 

nance, page 23) or

replace burner orifice (see Changing Burner Orifice, page 30).

100749

Page 26
Image 26
Desa GVC65NA, GVC50NA, GVC35NA installation manual Lighting Instructions

GVC35NA, GVC50NA, GVC65NA specifications

Desa GVC series heaters, including models GVC35NA, GVC65NA, and GVC50NA, are prominent products in the realm of gas-fired heating solutions. These heaters are designed for residential and light commercial applications, providing a reliable heat source with high efficiency.

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