Flue Gas High Temperature Limit Switch - Conair GasTrac User Manual

F G
LUE AS
T
EMPERATURE
L S
IMIT WITCH
Alarm
The control panel
alarm light is on, but
no other controller
alarm messagesor
lights are displayed.
!
WARNING:
The GasTrac
should be tested
and repaired only
by qualified techni-
cians equipped
with the correct
tools and trained in
the maintenance
and repair of elec-
trical systems and
industrial gas
appliances.
6-14
T
ROUBLESHOOTING
H
The flue gas high temperature switch monitors the tempera-
IGH
ture of a type J thermocouple mounted in the flue gas outlet.
When the combustion exhaust gas temperature exceeds 800˚F,
the GasTrac shuts down and the alarm light illuminates.
Possible cause
Is the temperature limit
switch faulty?
Does the combustion
air/fuel train need tun-
ing?
GasTrac Process Air Heater
alarm light
2216
235.0
OP1
OP2
250.0
SP2
REM
RUN
MAN HOLD
Solution
Push the reset button on the
GasTrac electrical enclosure
and restart the GasTrac. If the
alarm occurs again, a qualified
electrician should verify that
the latching alarm contacts of
the flue gas high temperature
limit switch are closed.
This must be done by a quali-
fied technician who is trained
in the maintenance of industri-
al gas appliances, and who is
familiar with tuning proce-
dures outlined in the various
controller, valve and switch
manuals that came with the
GasTrac.
If the alarm persists, call the
Conair Service Department.
UGD014/0497