Desa CGN10R - Manual (Page 12)

12 103549
GAS RESIDENTIAL HEATERS
TROUBLESHOOTING
Note: All Trouble Shooting items are listed
in order of operation.
WARNING: Turn off heater and let cool before servicing. Only a
qualified service person should service and repair heater.
CAUTION: Never use a wire, needle, or similar object to clean ODS/
pilot. This can damage ODS/pilot unit.
MANUAL SHUTOFF
VALVE - GA5010
Manual shutoff valve with 1/8" NPT tap.
ACCESSORY
Purchase this heater accessory from your local dealer. If they cannot
supply this accessory, either contact your nearest Parts Central (see
above) or call DESA International’s Parts Department at 1-800-972-
7879 for referral information. You can also write to the address listed
on the back page of this manual.
SPECIFICATIONS
Btu (Variable) 5,500/10,000
Type Gas Natural Only
Ignition Piezo
Pressure Regulator Setting 3" W.C.
Inlet Gas Pressure (inches of water)
Maximum 10.5"
Minimum 4"
Dimensions, Inches (H x W x D)
Heater 20 1/2 x 13 1/2 x 5
Carton 25 x 16 11/16 x 7 1/2
Weight (pounds)
Heater 14
Shipping 18
OBSERVED PROBLEM
When ignitor button is pressed and control
knob is pressed in and turned to the PILOT
position, there is no spark at ODS/pilot
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to
ignitor cable
4. Ignitor cable pinched or wet
5. Piezo Ignitor nut is loose
6. Broken ignitor cable
7. Bad piezo ignitor
REMEDY
1. Replace ignitor
2. Replace ignitor
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any metal
or tubing. Keep ignitor cable dry
5. Tighten nut holding piezo ignitor to
heater cabinet. Nut is located inside
heater cabinet at top
6. Replace ignitor cable
7. Replace control valve (piezo is part of
control valve)
When ignitor button is pressed and control
knob is pressed in and turned to the PILOT
position, there is spark at ODS/pilot but no
ignition 1. Gas supply turned off or manual 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. ODS/pilot is clogged
6. Gas regulator setting is not correct
1. Turn on gas supply or open manual
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
removed
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 15) or replace ODS/
pilot assembly
6. Replace gas regulator