Desa RCP25 Owner's Manual page 6

TROUBLESHOOTING
6
INSPECTING BURNER
TROUBLESHOOTING
You may have further questions about this heater. If so, contact DESA
Heating Products' Technical Service Department at 1-866-672-6040
or visit our web site at www.desatech.com.
SYMPTOM
Burner fails to light
Burner lights but goes out when auto-
matic control valve button is released
Maximum burn rate is low
INSPECTING BURNER
WARNING: Heater shell, top, and heated air from
heater is very hot during operation. Gradually move
in closer to heater to observe flame color. Do not
touch heater shell or top. Do not get too close to
heated air from heater. Severe burns could occur.
To check for correct burner flame, look through the ventilation holes
in the top of the heater to see the burner flame. The burner flame
should be mostly blue with slight yellow coloring on the ends. If the
burner flame is mostly yellow, the primary air openings on the
burner tube under the heater base may be blocked (see Figure 5).
1. Stop heater (see To Stop Heater on page 5) and let cool.
2. Turn heater over to locate the primary air openings on the burner
tube (see Figure 5). Remove any debris blocking the primary
air openings.
POSSIBLE CAUSE
1. Propane supply valve closed on propane
tank(s)
2. Blockage in burner/valve assembly
3. Piezo ignition system not sparking
1. Not enough warm-up time
2. Low gas pressure
3. Thermocouple loose or needs to be re-
placed
4. Automatic control valve needs to be replaced
1. Low gas pressure
2. Low fuel supply
3. Plugged gas orifices
For more information, visit www.desatech.com
For more information, visit www.desatech.com
WARNING: Never attempt to service heater while it
is connected to propane supply, operating, or hot.
Severe burns can occur.
REMEDY
1. Open propane supply valve slowly
2. Replace burner/valve assembly
3. Assure ignitor electrode gap is .120" (3.04 mm).
Check wire lead for damage. Replace piezo
ignitor and/or ignitor electrode as necessary
1. Relight, hold automatic control valve button
in 45 seconds
2. Check propane tank(s) for proper gas supply
3. Tighten connection or replace thermocouple
4. Replace automatic control valve assembly
1. Check gas supply; check regulator output
2. Consult propane gas supplier
3. Replace burner assembly
Figure 5 - Bottom View of Heater
Primary Air
Openings
Burner
Tube
111678-01A