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 TM 55-1905-242-14
OPERATOR, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
THEORY OF OPERATION
HEATING, AIR CONDITIONING, AND VENTILATION SYSTEMS
GENERAL
The LCM-8 Mod 2 is equipped with heating, air conditioning, and ventilation systems to maintain habitability in the interior
living and working spaces. The pilothouse and accommodation module are heated, air conditioned, and ventilated and the
engine room is ventilated.
HEATING AND AIR CONDITIONING SYSTEM
Three heat pump units heat and cool the pilothouse and accommodation module. The system consists of condensing units,
cooling units, refrigerant, control assemblies, raw water pump, and strainer. The system is powered by the vessel's 220 Vac
electrical system through the 220/110 volt distribution box.
OVERBOARD
DISCHARGE
REFRIGERANT
PORT ACC.
PORT ACC. MOD.
REFRIGERANT
MOD. CONDENSING
COOLING UNIT
UNIT
PILOTHOUSE
COOLING UNIT
STBD ACC.
REFRIGERANT
STBD ACC. MOD.
MOD. CONDENSING
COOLING UNIT
UNIT
REFRIGERANT
PILOTHOUSE
CONDENSING
UNIT
REFRIGERANT
REFRIGERANT
SEA CHEST
RAW WATER
PUMP
RAW WATER
SHUTOFF VALVE
RAW WATER
STRAINER
Condensing Unit
Three condensing units are installed in the heating and air conditioning system. Two units, one port and one starboard, are
dedicated to the accommodation module, and one unit is dedicated to the pilothouse. The units are all mounted in the void
beneath the pilothouse deck. The condensing units receive refrigerant from the cooling units, compress and condense the
refrigerant, and send the refrigerant back to the cooling units. Compression of the refrigerant is accomplished by an integral
compressor. Condensation of the refrigerant is accomplished by passing the compressed refrigerant through a raw water-
cooled condenser coil.
0012 00-1
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