TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

ODS/pilot lights but flame goes

1. Control knob not fully pressed in

1.

Press in control knob fully

out when control knob is re-

2. Control knob not pressed in

2.

After ODS/pilot lights, keep

leased

 

long enough

 

control knob pressed in 30

 

3.

Safety interlock system has

3.

seconds

 

Wait one minute for safety in-

 

 

been triggered

 

terlock system to reset. Repeat

 

4.

Equipment shutoff valve not

4.

ignition operation

 

Fully open equipment shutoff

 

5.

fully open

5.

valve

 

Pilot flame not touching ther-

A) Contact local natural or

 

 

mocouple, which allows ther-

 

propane/LP gas company

 

 

mocouple to cool, causing pilot

 

B) Clean ODS/pilot (see

 

 

flame to go out. This problem

 

 

 

could be caused by one or both

 

Cleaning and Maintenance,

 

 

of the following:

 

page 20) or replace ODS/pilot

 

 

A) Low gas pressure

 

assembly

 

 

B) Dirty or partially clogged

 

 

 

 

6.

ODS/pilot

6.

Hand tighten until snug, then

 

Thermocouple connection

 

7.

loose at control valve

7.

tighten 1/4 turn more

 

Thermocouple damaged

Replace pilot assembly

 

8.

Control valve damaged

8.

Replace control valve

 

 

 

 

 

Burner does not light after ODS/

1. Inlet gas pressure is too low

1.

Contact local natural or pro-

pilot is lit

2.

Burner orifice(s) clogged

2.

pane/LP gas company

 

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 20) or

 

3.

Mislocated crossover tube

3.

replace burner orifice(s)

 

Contact qualified service person

 

4.

Remote selector in OFF posi-

4.

Put remote selector in ON

 

5.

tion

5.

position

 

Wire disconnected from gas

See Wiring Diagram, page 21

 

 

control

 

 

 

 

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

2.

Burner orifice(s) clogged

2.

pane/LP gas company

 

Clean burner(s) (see Cleaning

 

 

 

 

and Maintenance, page 20) or

 

 

 

 

replace burner orifice(s)

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 20)

 

2.

Damaged burner

2.

or replace burner orifice

 

Replace damaged burner

 

3.

Gas regulator defective

3.

Replace gas regulator

116412-01B

www.desatech.com

23

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Desa VFRMV18PB, VFRMV18NB, VFRMV24NB, VFRMV24PB installation manual Troubleshooting, Maintenance

VFRMV18PB, VFRMV18NB, VFRMV24NB, VFRMV24PB specifications

The Desa VFRMV series is a sophisticated line of heating solutions known for its efficiency and modern design. The models in this series include the VFRMV24NB, VFRMV24PB, VFRMV18NB, and VFRMV18PB, each sharing a commitment to provide superior comfort and versatility in various living spaces.

One of the most notable features of the VFRMV series is its advanced heating technology. These units are equipped with a powerful burner system designed to maximize heat output while minimizing energy consumption. This makes the units not only environmentally friendly but also cost-effective, as users can enjoy warm indoor spaces without incurring high energy bills. The gas burners achieve a high thermal efficiency, ensuring that a significant amount of heat is delivered into the room promptly.

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