GSI Group PNEG-377, Руководство по обслуживанию

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37
Fan and Heater
ALWAYS DISCONNECT
AND LOCK OUT POWER
BEFORE WORKING ON OR
AROUND HEATER
OPERATING PROCEDURE
The control panel display showing initial start up.
All safety and high limit switches are checked upon power
up. If a safety or limit is open, the control displays it.
The control cannot operate with a safety switch error,
and the fan cannot turn on with an error condition. There
Standard electrical safety practices and codes should
be used when working with a heater. Refer to the
National Electric Code Standard Handbook by
the National Fire Protection Association.
A quali-
fied electrician should make all wiring instal-
lations.
Power Up
the controller locks up with the main display
alternating between a "FAN" and "ON" message.
This may be bypassed by depressing and holding
the "FAN BYPASS" switch (lower right switch).
Normal operating procedure should be to power up
the controller with the fan off.
If multiple heaters are tied together, and the
master detects that the slave fan is on (the air
switch stuck?), the master will lock up displaying
"SLA ERROR". This condition may be bypassed
with the "FAN BYPASS" switch.
is no way to bypass an error condition. It must be fixed.
(See errors on page 21)
The air switch is also checked on power up.
The air switch must indicate no airflow. This is
necessary to check the function of the air switch.
However, if the operator forgets and turns the
fan on before the controller has been powered
up,