TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | |||
|
|
|
| ||
When ignitor button is pressed, | 1. Gas supply turned off or equip- | 1. | Turn on gas supply or open | ||
there is spark at pilot but no igni- |
| ment shutoff valve closed |
| equipment shutoff valve | |
tion (GA9050A Only) | 2. Control knob not in PILOT | 2. | Turn control knob to PILOT | ||
|
| position |
|
| position |
| 3. | Control knob not pressed in | 3. | Press in control knob while in | |
|
| while in PILOT position |
| PILOT position | |
| 4. | Air in gas lines when in- | 4. | Continue holding down control | |
|
| stalled |
|
| knob. Repeat igniting opera- |
| 5. | Pilot adjustment | screw |
| tion until air is removed |
| 5. | Adjust pilot flame for approxi- | |||
|
| closed |
|
| mately 2" blue flame |
| 6. | Pilot is clogged |
| 6. | Clean pilot (see Cleaning and |
|
|
|
|
| Maintenance, page 12) or |
|
|
|
|
| replace pilot assembly |
| 7. | Low gas pressure |
| 7. | Replace gas control |
|
|
|
|
| |
Pilot lights but flame goes out | 1. Control knob not | fully | 1. | Press in control knob fully | |
when control knob is released |
| pressed in |
| 2. | After pilot lights, keep control |
(GA9050A Only) | 2. Control knob not pressed in | ||||
|
| long enough |
|
| knob pressed in 30 seconds |
| 3. | Equipment shutoff valve not | 3. | Fully open equipment shutoff | |
|
| fully open |
|
| valve |
| 4. | Pilot flame not touching | 4. | A) Contact local natural gas | |
|
| thermocouple, which allows |
| company | |
|
| thermocouple to cool, caus- |
|
| |
|
| ing pilot flame to go out. This |
| B) Clean pilot (see Cleaning | |
|
| problem could be caused by |
| and Maintenance, page 12) or | |
|
| one or both of the following: |
| replace pilot assembly | |
|
| A) Low gas pressure |
|
|
|
|
| B) Dirty or partially clogged |
|
| |
|
| pilot |
|
|
|
| 5. | Thermocouple connection | 5. | Hand tighten until snug, then | |
|
| loose at control valve |
|
| tighten 1/4 turn more |
| 6. | Thermocouple damaged | 6. | Replace thermocouple | |
| 7. | Control valve damaged | 7. | Replace control valve | |
|
|
|
| ||
Burner does not light after pilot | 1. Burner orifice clogged | 1. | Clean burner orifice | ||
is lit (GA9050A Only) | 2. Inlet gas pressure is too low | 2. | Contact local natural gas | ||
| 3. | Thermocouple leads dis- |
| company | |
| 3. | Reconnect leads | |||
|
| connected or improperly |
|
| |
|
| connected |
|
|
|
|
|
|
| ||
Delayed ignition burner | 1. Pilot flame needs adjusting | 1. | Adjust pilot flame for approxi- | ||
(GA9050A Only) | 2. | Wrong pilot orifice |
|
| mately 2" blue flame |
|
| 2. | Replace pilot orifice set | ||
14 | www.desatech.com |