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P77-3 SC30 Manual 9.27.2019 Page 27
TROUBLE SHOOTING
N
AT
G
AS
&
LP
M
ODELS
No spark at electrodes
1. Is burner blower operating? Possible defective blower motor.
2. Clean electrodes and pilot igniter assembly. Apply heat if moisture is present.
3. Check electrode position. See drawing in Midco manual for proper adjustment.
4. Defective Honeywell Control Board. Check voltage to 25V terminal on board.
5. Check service breaker, timer, electrical connections, and polarity.
Spark but no ignition
6. Confirm gas pressure. LP gas @ 11” WC or NAT gas @ 7” WC.
7. Clean electrodes and pilot igniter assembly. Apply heat if moisture is present.
8. Check electrode position. See drawing in Midco manual for proper adjustment.
9. Listen to confirm that solenoid gas valve is opening. Possible defective gas valve.
10. Check for dirt in brass pilot orifice tee.
If incinerator does not burn properly
11. Have the ashes been removed at the beginning of the day?
12. Be sure there is no obstruction blocking the burner tube.
13. Is the air shutter in the full open position? See diagram in “BURNER SETTINGS” section of
this manual.
14. Check gas pressure while the burner is burning. LP gas @ 11” WC or NAT gas @ 7” WC.
F
UEL
O
IL
M
ODELS
No spark at electrodes
1. Be sure there is no obstruction in the end of the burner tube and there is no soot
build-up on the retention head, electrodes or nozzle.
2. Check all electrical connections.
3. Transformer may be burned out. Listen or look to see if there is an arc across
the electrodes. Replace transformer if no spark is present.
4. Check for damage to electrodes.
5. Improper firing head adjustment. See Beckett burner installation manual.
No oil spray through nozzle
1. Defective motor. Check to see if blower wheel is turning. If not, check electrical
connections and voltage to motor.
2. Air in fuel line. Check all fittings between burners and at fuel tank for tightness.
Air may be bled from the fuel line at the fuel pump.
3. Dirt or water in oil tank.
4. Check the plastic coupling between motor and pump for tight fit.
5. Check for clogged filter at tank or on nozzle.
6. Be sure there are no kinks in the oil line.
7. Check the tubing between the pump and nozzle for blockage.
8. Defective pump.
If incinerator does not burn properly
1. Confirm No. 1 Fuel Oil (Kerosene) or No. 2 Fuel Oil (Diesel) is being used.
2. Are ashes or other obstructions blocking the burner tube?
3. Are the air bands adjusted correctly?
Summary of Contents for P77-3-SC30
Page 3: ...P77 3 SC30 Manual 9 27 2019 Page 3 ...
Page 12: ...P77 3 SC30 Manual 9 27 2019 Page 12 ...
Page 28: ...P77 3 SC30 Manual 9 27 2019 Page 28 MIDCO BURNER J121 DS EXPLODED VIEW ...
Page 36: ...P77 3 SC30 Manual 9 27 2019 Page 36 ...
Page 37: ...P77 3 SC30 Manual 9 27 2019 Page 37 MIDCO BURNER INTERNAL WIRING ORANGE L1 ...
Page 38: ...P77 3 SC30 Manual 9 27 2019 Page 38 INCINERATOR WIRING DIAGRAM ...
Page 39: ...P77 3 SC30 Manual 9 27 2019 Page 39 ...
Page 40: ...P77 3 SC30 Manual 9 27 2019 Page 40 ...
Page 41: ...P77 3 SC30 Manual 9 27 2019 Page 41 LINKAGE DIAGRAM ...
Page 44: ...P77 3 SC30 Manual 9 27 2019 Page 44 ...
Page 45: ...P77 3 SC30 Manual 9 27 2019 Page 45 FDC Future Design Control Specification Review ...