Desa VVSR18 Owner's Operation And Installation Manual page 13

TROUBLESHOOTING
Continued
OBSERVED PROBLEM
When ignitor button is pressed, there is
spark at pilot but no ignition (GA9050A
Only)
Pilot lights but flame goes out when control
knob is released (GA9050A Only)
Burner does not light after pilot is lit
(GA9050A Only)
Delayed ignition burner (GA9050A Only)
For more information, visit www.desatech.com
For more information, visit www.desatech.com
901265-01K
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 installed
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 allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem 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 con-
trol valve
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Thermocouple leads disconnected or im-
properly connected
1. Pilot flame needs adjusting
2. Wrong pilot orifice
TROUBLESHOOTING
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 igniting operation until air is re-
moved
5. Adjust pilot flame for approximately
2" blue flame
6. Clean pilot (see Cleaning and Mainte-
nance, page 11) or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep control knob
pressed in 30 seconds
3. Fully open equipment shutoff valve
4. A) Contact local natural gas company
B) Clean pilot (see Cleaning and Mainte-
nance, page 11) 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 orifice
2. Contact local natural or propane/LP gas
company
3. Reconnect leads
1. Adjust pilot flame for approximately
2" blue flame
2. Replace pilot orifice set
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