TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE | REMEDY |
ODS/pilot lights but flame goes out when control knob is released
1.Control knob not fully pressed in
2.Control knob not pressed in long enough
3.Equipment shutoff valve not fully open
4.Thermocouple connection loose at control valve
5.Pilot flame not touching thermocouple, which allows thermocouple to cool, caus- ing pilot flame to go out. This problem could be caused by one or both of the following:
A)Low gas pressure
B)Dirty or partially clogged ODS/pilot
6.Thermocouple damaged
7.Control valve damaged
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in 30 seconds
3.Fully open equipment shut- off valve
4.Hand tighten until snug, then tighten 1/4 turn more
5.A) Contact local natural or propane/LP gas company
B)Clean ODS/pilot (see Cleaning, page 16) or re- place ODS/pilot assembly
6.Replace pilot assembly
7.Replace control valve
Burner(s) does not light after ODS/pilot is lit
1. B u r n e r o r i f i c e ( s ) i s clogged
2.Inlet gas pressure is too low
1.Clean burner orifice(s) (see Cleaning, page 16) or replace burner orifice(s)
2.Contact local natural or propane/LP gas company
Delayed ignition of burner(s) 1. Manifold pressure is too low
2. B u r n e r o r i f i c e ( s ) i s clogged
1.Contact local natural or propane/LP gas company
2.Clean burner orifice(s) (see Cleaning, page 16) or replace burner orifice(s)
Burner backfiring during 1. | Burner orifice(s) is clogged | 1. | Clean burner orifice(s) |
combustion | or damaged |
| (see Cleaning, page 16) or |
|
|
| replace burner orifice(s) |
2. | Burner damaged | 2. | Replace burner |
3. | Gas regulator defective | 3. | Replace gas regulator |
Burner plaque(s) does not | 1. | Plaque damaged |
glow | 2. | Inlet gas pressure is too |
|
| low |
| 3. | Control knob set between |
|
| locked positions |
1.Replace burner
2.Contact local natural or propane/LP gas company
3.Turn control knob until it locks at desired setting
Slight smoke or odor during | 1. | Residues from manufactur- | 1. | Problem will stop after a few |
initial operation |
| ing processes |
| hours of operation |
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Heater produces a clicking/ | 1. | Metal expanding while | 1. | This is normal with most |
ticking noise just after burner |
| heating or contracting while |
| heaters. If noise is exces- |
is lit or shut off |
| cooling |
| sive, contact qualified ser- |
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| vice person |
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www.desatech.com | 19 |
