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Air Heater Assembly - Operation
OPERATION
PRINCIPLES OF
NOTES
OPERATION
The Air Heater system is shipped as 230V/
1 phase 50/60 Hz operation but can be converted
with simple jumper changes to 115 volt operation.
Heater and controls are contained in a single,
steel Type 12 enclosure vented to the atmosphere
through access ports for compressed air delivery.
Three LED indicator lights indicate the status of the
system. Green indicates a "power on" condition.
Red indicates an "alarm condition" resulting in
shutdown of power to the heater. Amber indicates
"insufficient air flow" for safe operation. The red
or amber light remains steady when ON or can be
jumper selected to flash when ON. In addition, an
audible warning option is also jumper selectable
to sound in intermittent warning when either the
red or the amber light is lit.
If an alarm condition occurs such as high tempera-
ture or insufficient air flow, the power to the heater
is interrupted by the safety contactor. When the
alarm condition is removed by the heater cooling
off or the airflow increasing, the heater will be
energized and operate until the system is turned
off or the next alarm condition occurs.
The heart of the control process is the temperature
controller. Upon startup, or immediately follow-
ing the acknowledgement of any alarm condi-
tion, the controller's PID programming provides
a fast, smooth approach to the final temperature
set- point. The PID parameter is set per "Auto-
Tuning Procedure" (see "Controller" manual for
"Auto-Tuning Procedure and all detailed controller
functions").
No cooling is required for the system. Air flow of
at least one (1) SCFM (28.3 SLPM) will satisfy
heater needs.
13
LN-9245-00.8
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