Installation manual

www.desatech.com
901265-01S 17
POSSIBLE CAUSE
1. Gas supply turned off or
equipment shutoff valve
closed
2. Control knob not in PILOT
position
3. Control knob not pressed
in while in PILOT position
4. Air in gas lines when in-
stalled
5. Pilot adjustment screw
closed
6. Pilot is clogged
7. Low gas pressure
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 al-
lows thermocouple to cool,
causing 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. Thermocouple leads dis-
connected or improperly
connected
1. Pilot ame needs adjusting
2. Wrong pilot orice
REMEDY
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Continue holding down
control knob. Repeat ignit-
ing operation until air is
removed
5. Adjust pilot flame for ap-
proximately 2" blue ame
6. Clean pilot (see Cleaning
and Maintenance, page 15)
or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep con-
trol knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural gas
company
B) Clean pilot (see Cleaning
and Maintenance, page 15)
or replace pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace thermocouple
7. Replace control valve
1. Clean burner orice
2. Contact local natural or
propane/LP gas company
3. Reconnect leads
1. Adjust pilot flame for ap-
proximately 2" blue ame
2. Replace pilot orice set
OBSERVED PROBLEM
When ignitor button is pressed,
there is spark at pilot but no
ignition (GA9050A-1 Only)
Pilot lights but ame goes out
when control knob is released
(GA9050A-1 Only)
Burner does not light after pilot
is lit (GA9050A-1 Only)
Delaye d ig nition bu rne r
(GA9050A-1 Only)
TROUBLESHOOTING
Continued