Cleaver-Brooks CBW - C. Pilot Flame, But No Main Flame

CHAPTER6
(b) Improper electrode setting.
(c)
Loose terminal on ignition cable;
cable shorted.
(d) Inoperative ignition transformer.
(e) Insufficient or no voltage at pilot
ig·
nition circuit terminal.
(2)
Spark but no flame.
(a) Lack
of fuel- no gas pressure~ closed
·valve, empty tank, broken line, etc.
(b) Inoperative pilot solenoid.
(c) Insufficient or no voltage at pilot
ig-
nition circuit terminal.
(d) Too much air.
(3) Low fire switch open in low fire
prov·
ing circuit.
(a) Damper motor not closed, slipped
cam, defective switch.
(b) Damper jammed
or linkage binding.
750-150
TROUBLE SHOOTING
(4) Running interlock circuit not com-
pleted.
(a) Combustion
or atomizing air proving
switches defective
or not properly set.
(b) Motor starter interlock contact not
closed.
(S) Flame detector defective, sight tube
obstructed, or lens dirty.
C. PILOT FLAME, BUT NO
IVIAIN FLAME
(1) insufficient pilot flame.
(2) Gas Fired Unit.
(a) Manual gas cock closed.
(b) Main gas valve inoperative.
(c) Gas pressure regulator inoperative.
(3)
Oil fired unit.
(a)
Oil supply cut off by obstruction,
closed valve, or loss of suction.
CHAPTER 6--3