Vanguard Heating VMH26TN installation manual Trouble- Shooting, Continued, Cleaning and Mainte

Models: VMH26TN

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Cleaning and Mainte-

26

TROUBLE- SHOOTING

Continued

 

OBSERVED

POSSIBLE

 

 

 

PROBLEM

CAUSE

REMEDY

 

 

 

 

 

 

 

Burner does not light

1.

Burner orifice is

1.

Clean burner (see

 

after ODS/pilot is lit

 

clogged

 

Cleaning and Mainte-

 

 

 

 

 

nance, page 24) or

 

 

 

 

 

replace burner orifice

 

 

2.

Burner orifice diameter

2.

Replace burner orifice

 

 

 

is too small

 

 

 

 

3.

Inlet gas pressure is

3.

Contact local natural gas

 

 

 

too low

 

company

 

 

 

 

 

 

 

Delayed ignition of

1.

Manifold pressure is

1.

Contact local natural gas

 

burner

 

too low

 

company

 

 

2.

Burner orifice is

2.

Clean burner (see

 

 

 

clogged

 

Cleaning and Mainte-

 

 

 

 

 

nance, page 24) or

 

 

 

 

 

replace burner orifice

 

 

 

 

 

 

 

Burner backfiring

1.

Burner orifice is

1.

Clean burner (see

 

during combustion

 

clogged or damaged

 

Cleaning and Mainte-

 

 

 

 

 

nance, page 24) or

 

 

 

 

 

replace burner orifice

 

 

2.

Burner damaged

2.

Replace burner pressure

 

 

3.

Low inlet gas pressure

3.

Contact local natural gas

 

 

 

 

 

company

 

 

4.

Gas regulator defective

4.

Replace gas regulator

 

 

 

 

 

 

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 24)

 

 

2.

Gas regulator defective

2.

Replace gas regulator

 

 

 

 

 

 

Slight smoke or odor

1. Residues from manu-

1.

Problem will stop after a

 

during initial operation

 

facturing processes

 

few hours of operation

 

 

 

 

 

 

Fireplace produces a

1. Turning control knob

1.

Turn control knob to LO

 

whistling noise when

 

to HI position when

 

position and let warm up

 

burner is lit

 

burner is cold

 

for a minute

 

 

2.

Air in gas line

2.

Operate burner until air

 

 

 

 

 

is removed from line.

 

 

 

 

 

Have gas line checked

 

 

 

 

 

by local natural gas

 

 

 

 

 

company

 

 

3.

Air passageways on

3.

Observe minimum

 

 

 

fireplace blocked

 

installation clearances

 

 

 

 

 

(see Figure 6 and 7,

 

 

 

 

 

page 11)

 

 

4.

Dirty or partially

4.

Clean burner (see

 

 

 

clogged burner orifice

 

Cleaning and Mainte-

 

 

 

 

 

nance, page 24) or

 

 

 

 

 

replace burner orifice

102885

Page 26
Image 26
Vanguard Heating VMH26TN installation manual Trouble- Shooting, Continued, Cleaning and Mainte