Grain Systems PNEG-584 - Manual (Page 12)

12
SERIES TWO HEATER
ALWAYS DISCONNECT
AND LOCK OUT POWER
BEFORE WORKING ON OR
AROUND HEATER
The control panel display showing initial start up.
up with the main display alternating between a "FAN"
and "ON" message. This may be bypassed by depress-
ing 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 mas-
ter detects that the slave fan is on (the air switch
stuck?), the master will lock up displaying "SLA ER-
ROR". This condition may be bypassed with the "FAN
BYPASS" switch.
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 is no way
to bypass an error condition. It must be fixed. (see errors on
page 20)
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 opera-tor forgets and turns the fan on before the
controller has been powered up, the controller locks
Standard electrical safety practices and codes should be
used when working with a heater. Refer to the Na-
tional Electric Code Standard Handbook by the Na-
tional Fire Protection Association. A qualified elec-
trician should make all wiring installations.
POWER UP
HEATER OPOERATION PROCEDURE