Installation manual

www.desatech.com
118531-01C36

Pilot lights but flame goes
out when control knob is
released
Burner does not light after
pilot is lit
Delayed ignition burner
Burner backring during com-
bustion
Slight smoke or odor during
initial operation
Heater produces a whistling
noise when burner is lit
REMEDY
1. Press in gas control knob
fully
2. After pilot lights, keep gas
control knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural or
propane/LP gas company
B) Clean pilot (see Cleaning
and Maintenance, page 33)
or replace pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Clean burner (see Cleaning
and Maintenance, page 33)
or replace burner orice
2. Contact local propane/LP or
natural gas company
3. Reconnect leads to TP and
TPTH terminals on control
valve
4. Replace thermopile
1. Contact local propane/LP or
natural gas company
2. Clean burner (see Cleaning
and Maintenance, page 33)
or replace burner orice
1. Clean burner (see Cleaning
and Maintenance, page 33)
or replace burner orice
2. Replace damaged burner
3. Replace gas control
1. Problem will stop after a few
hours of operation
1. Turn gas control knob to LO
position and let warm up for
a minute
2. Operate burner until air is
removed from line. Have gas
line checked by local propane/
LP or natural gas company
3. Clean burner (see Cleaning
and Maintenance, page 33)
or replace burner orice

1. Gas control knob not fully
pressed in
2. Gas 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 ame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
pilot
5. Thermocouple connection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
1. Burner orice clogged
2. Inlet gas pressure is too
low
3. Thermopile leads discon-
nected or improperly con-
nected
4. Thermopile is defective
1. Manifold pressure is too
low
2. Burner porting or orifice
clogged
1. Burner orice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Residues from manufacturing
processes and logs curing
1. Turning gas control knob to HI
position when burner is cold
2. Air in gas line
3. Dirty or partially clogged
burner orice
TROUBLESHOOTING
Continued