TM 10-4520-262-12&P 0006 00
The heater will operate at full power until the Battery Charging Light illuminates. Once
the light comes on, the LOWER-HIGHER control can be used to regulate heater output.
Once the ON/OFF switch on the in-tent controller assembly has been placed in the ON position, the
HEATER ON/ON-HOLD advisory light is lit and the heater is in one of the following modes:
Pre-purge. During pre-purge, the combustion air blower assembly and the heated air blower assembly
fan operate to clear any fumes from the heater.
Normal operation. The combustion air blower assembly and the heated air blower assembly fan
continue to operate during normal operation to circulate the heated breathable air to the tent and to
exhaust combustion fumes.
On-hold. In the HEATER ON/ON-HOLD mode, the heater does not heat but automatically begins heating
in response to either changes in the tent temperature or changes to the LOWER/HIGHER setting on the
in-tent controller assembly.