* A) Burner screen failure (hole) or burner gasket.
SOLUTION:
Replace burner screen or gasket (Figure 4).
* B) Burner over-fired - manifold pressure too high.
SOLUTION:
Check and reset gas control regulator to give
rating plate value for manifold pressure (shown under Performance Criteria on Page 6). Wait 5 minutes &
relight. Flashback will not occur immediately unless a large opening in or around the burner screen is evident.
Wait an hour after relighting to check that problem is solved. Figure 5 illustrates which regulator sets high and
low gas pressures.
2. PROBLEM: FLAMES VISIBLE AT EXHAUST STACK OR IN CHAMBER.
POSSIBLE CAUSE:
* A) Low gas pressure.
SOLUTION:
Check and reset gas control regulator to give rating value for manifold pressure
(shown under Performance Criteria on Page 6. Figure 5 illustrates which regulator sets high and low pressures.
3. PROBLEM: PILOT FLAME GOES OUT AFTER 90 SECONDS OF IGNITION TRIAL.
POSSIBLE CAUSE:
* A) Pilot assembly dirty or bent.
SOLUTION:
Check for bent pilot gas line and/or dislodge debris.
* B) Low gas pressure.
SOLUTION:
Increase gas pressure to appliance (see Figure 5).
* C) Pilot orifice clogged.
SOLUTION:
Dislodge debris or replace orifice.
4. PROBLEM: BURNER WILL NOT LIGHT AT ALL.
POSSIBLE CAUSE:
* A) Orifice.
SOLUTION:
Check that orifice is not plugged. (If it is necessary to change the orifices, new ones must
be ordered from the factory.)
* INSTRUCTIONS MARKED WITH ASTERISKS SHOULD BE PERFORMED BY AUTHORIZED SERVICE
PERSONNEL.
B) Check that flame runner is fully lit.
SOLUTION:
If not, clean flame runner orifice or remove and clean
flame runner. Refer to Figure 2.
C) Pilot.
SOLUTION:
Pilot must light and stay lit in order for burner to light. Check pilot problem list (see Item 3 on
Page 11).
* D) Gas Solenoid.
SOLUTION:
Check that solenoid valve on main gas valve is working.
5.
PROBLEM: CONVEYOR CHAIN WILL NOT MOVE.
POSSIBLE CAUSE:
A) Check 10 amp fuse.
SOLUTION:
Replace if blown.
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