TM 10-4520-262-12&P 0007 00
SPACE HEATER, CONVECTIVE (SHC)
OPERATION UNDER UNUSUAL CONDITIONS
OPERATION IN EXTREME SAND, DUST, AND/OR HIGH WINDS
The heater has been designed to operate in dusty or sandy conditions. However, some
forms of very fine dusts may be explosive (e.g., flour, chaff, coal, etc.). Before operation
of the heater in dusty conditions, an attempt should be made to identify the dust type to
insure that it is not explosive in nature.
If possible, the heater should be positioned to minimize the amount of dust, sand, or any other material in
the area that could be pulled into the heater by the fans (air flow is 250 cubic feet per minute (CFM)
during normal operation of the heater).
When operating in conditions of extreme sand or dust, it is recommended that the air supply (1) and
return ducts (2) be secured to the heater and the ducts securely connected to the tent. It is further
recommended that the optional combustion air inlet pipe (3), and optional combustion exhaust pipe (4) be
used if at all possible. Refer to WP 0066 entitled Additional Authorized Items List for specific information
on these optional items. Instructions for the use of these optional items are included with the equipment.
If high winds are expected, the open ends of the optional combustion air inlet pipe (3) and optional
combustion exhaust pipe (4) should be positioned next to each other, both pointed in the same direction,
and pointed away from the prevailing wind. It should be noted that the combustion air inlet does not
conduct breathable air into the tent. This pipe is only used to conduct air into the burner assembly for
combustion. Therefore, placing the combustion air inlet pipe and combustion exhaust pipe side by side is
not a safety concern.
If high winds are expected, the fuel can stand (5), ducts (1)(2), optional combustion air inlet pipes (3),
optional combustion exhaust pipe (4), and the heater itself (6) may require additional anchor or tiedowns
to prevent high winds from shifting the equipment.
During refueling and at regular intervals between refueling, the heater (6), its ducts (1)(2), optional
combustion air inlet pipe (3), and optional combustion exhaust pipe (4) should be inspected for a buildup
of dust or sand that would cover the heater or block the ducts or pipes.
During refueling and at regular intervals between refueling, the sediment strainer (7) should be visually
checked for dirt or other contamination. If dirt or other contamination is present, the sediment strainer
should be serviced in accordance with WP 0020 00 entitled Solenoid Valve and Sediment Strainer
Special care should be used during refueling to prevent sand or dust contamination of fuel, fuel can, and