Grain Systems PNEG-591 - Manual (Page 13)

13
Series 2000 Downwind 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 dis-
plays it. The control cannot operate with a safety switch
error, and the fan cannot turn on with an error condi-
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 installa-
tions.
Power Up
The controller locks up with the main display alter-
nating between a "FAN" and "ON" message. This
may be bypassed by depressing and holding the
"FAN BYPASS" switch (lower right switch). Nor-
mal 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 display-
ing "SLA ERROR". This condition may be by-
passed with the "FAN BYPASS" switch.
tion. There 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,