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Chapter 4
The flame failure light and alarm bell (optional) are energized
10 seconds later.
The blower motor will be then deenergized. The lockout
switch must be manually reset before operation can be
resumed. (Refer to the previous caution.)
3.
Loss of flame
If a flame outage occurs during normal operation and/or the
flame is no longer sensed by the detector, the flame relay will
trip within 2 to 4 seconds to de-energize the fuel valve circuit
and shut off the fuel flow. The reset switch lights and lockout
occurs immediately. The blower motor continues operation.
The flame failure light and alarm bell (optional) are energized
10 seconds later.
The blower motor will be deenergized. The lockout switch
must be manually reset before operation can be resumed.
(refer to the previous caution).
If the burner will not start, or upon a safety lockout, the
troubleshooting section in the operating manual and the
technical bulletin should be referred to for assistance in
pinpointing problems that may not be readily apparent.
The program relay has the capability to self-diagnose and to
display a code or message that indicates the failure condition.
Refer to the control bulletin for specifics and suggested
remedies. Familiarity with the program relay and other
controls in the system can be obtained by studying the
contents of the manual and this bulletin.
Knowledge of the system and its controls will make
troubleshooting much easier. Costly down time or delays can
be prevented by systematic checks of the actual operation
against the normal sequence to determine the stage at which
performance deviates from normal. Following a routine may
possibly eliminate overlooking an obvious condition, often
one that is relatively simple to correct.
Remember - a safety device, for the most part, is doing
its job when it shuts down or refuses to operate. Never
attempt to circumvent a safety feature.
Preventive maintenance and scheduled inspection of all
components should be followed. Periodic checking of the
relay is recommended to see that a safety lockout will occur
under conditions of failure to ignite either pilot or main flame,
or from loss of flame.
4-4
Sequence Of Operation
750-364
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