Fan and Heater
OPERATING PROCEDURE
The control panel display showing initial start up.
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.
ALWAYS DISCONNECT
AND LOCK OUT POWER
BEFORE WORKING ON OR
AROUND HEATER
Power 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
is no way to bypass an error condition. It mustbefixed. (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, 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.
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