TM 9-4520-257-12&P 0006 00
OPERATOR AND UNIT MAINTENANCE
H-45 LARGE RADIANT SPACE HEATER
(TYPE I, SOLID FUEL)
(TYPE II, LIQUID FUEL)
OPERATION UNDER UNUSUAL CONDITIONS
OPERATION IN UNUSUAL ENVIRONMENT AND/OR WEATHER CONDITIONS
Refer to Operation Under Usual Conditions (WP 0005 00), for specific operating instructions, and use this
work package for further instruction if operating the heater in unusual conditions. Read all sections that
apply to the conditions to which your heater will be exposed.
OPERATION IN DUSTY OR SANDY CONDITIONS
Liquid Fuel Operation Only
Inspect fuel line ends and fuel flow control fittings before making connections to ensure they are not
contaminated with dust or sand.
Keep lids installed on all fuel cans.
OPERATION IN EXTREME COLD CONDITIONS
Severe injury may occur to personnel handling metal parts without
protective gloves when temperatures are below freezing. Skin may
freeze upon contact and tear from the flesh.
When the temperature is below 25 Fahrenheit (-31.67 Celsius) and
JP4-8 fuel is used, be sure the fuel selector control is placed in the JP4-8
(BELOW 25F) position.
Do not overfuel the H-45 Type I (Solid Fuel) Heater. When using coal in the H-45 Type I (Solid Fuel)
Heater, remember that coal is a very dense fuel and generates significant heat output even when a small
quantity is used. Using a large quantity of coal may overfire the heater, making its output difficult to
control. Overfueling the heater may also cause overheating of the stack assembly resulting in igniting the