Kees DFG (DIRECT FIRED GAS) MAKE-UP AIR UNITS User Manual
Page 11
10
B.
BLOWER MOTOR STARTER
GOES OUT ON OVERLOAD.
REMEDY
Probable
1.
Motor drawing too many amps.
Slow blower RPM down.
Cause:
2.
Loose wiring.
Check wire connections.
3.
Low voltage to unit.
Check power supply to unit.
4.
Defective motor.
Replace motor.
5.
Belts too tight.
Adjust belts for 1" deflection.
6.
Defective blower bearings.
Replace bearings.
7.
Dirty blower wheel.
Clean blower.
8.
Defective starter overload.
Replace starter overload.
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C.
PILOT WILL NOT LIGHT
REMEDY
Probable
1.
No power to burner control
Check preceding controls for
Cause:
module.
open circuit.
2.
Air in pilot line.
Purge air from pilot line.
3.
Low gas pressure.
Supply unit with pressure stated
on unit identification plate.
4.
Burner control module locked
Press reset button on
out.
burner control module.
5.
Pilot regulator out of
Adjust unit pilot regulator to
adjustment.
increase pilot gas supply.
6.
Pilot regulator locked up.
Gas pressure to unit is excessive;
decrease supply pressure.
7.
Defective ignition transformer.
Replace transformer.
8.
Incorrect spark gap.
Adjust gap.
9.
Defective pilot solenoid valve.
Replace valve.
10.
Defective burner control
Replace module.
module.