TM 9-4520-260-13
Table 2-1. Heater Control Panel Controls and Indicators
Key
Control or Indicator
Function
1
Spare fuse holder
Houses a spare fuse.
2
Fuse
In-circuit fuse to protect electrical circuits from overload.
3
THERMO receptacle
Provides a connection for the room thermostat which controls
heater operation.
4
POWER receptacle
Provides a connection for 28 VDC into the heater.
5
RESET switch
When pressed, switch resets heater and timing circuits after
heater has stopped due to ignition failure.
6
ON-OFF switch
Controls starting and stopping of heater. In ON position the
heater will start and operate under control of the room
thermostat. In OFF position heater stops operating. If blower is
running when switch is moved to OFF, heater will continue to
run until heater cools, then motor will stop.
Table 2-2. Room Thermostat Control
Key
Control or Indicator
Function
1
Thermostat knob
Provides a means of selecting the temperature which heater is
to maintain.
Rotate knob to the desired temperature.
Figure 2-2. Room Thermostat.
NOTE
The thermostat provides the heated air output regulation. Raising the thermostat setting does not increase the heat
output. It only causes the heater to run until desired heat is reached. Setting the thermostat to its highest position at
startup does not increase the rate of heat. Set the thermostat only to the desired temperature in the enclosure.
2-3