Optional Equipment
Air–Conditioning System
CSP–900RFM206E–1
ROTORCRAFT FLIGHT MANUAL
MD900 With PW 206E
FAA Approved
Original
10–3
10–5.OPERATING INSTRUCTIONS: AIR CONDITIONING
(P/N 900P7250302–101)
PART I
GENERAL
The air−conditioning system circulates conditioned air throughout the cabin. A five
position rotary switch AC/VENT controls the vent fan and air−conditioning. COOL
HIGH provides air−conditioning at a high setting. COOL LOW provides air−condi&
tioning at a low setting, selected from the center console utility panel assembly.
The air−conditioning system provides ventilation, temperature, and humidity con&
trol. The air−conditioning system consists of:
Freon Compressor Assembly −
Compresses the air conditioning system refriger&
ant.
Lines and Tubing −
Routes refrigerant throughout the air conditioning system.
Condenser Fans −
Induce ambient airflow over the condenser.
Condenser −
Heat exchanger for the condensing refrigerant.
Receiver Dehydrator −
Removes moisture from the air conditioning system refrig&
erant.
High Pressure Switch −
Turns off the compressor in a high pressure condition
to prevent damage to air conditioning system.
Low Pressure Switch −
Activates or deactivates the Freon compressor assembly
in a low pressure condition to prevent damage to the air conditioning system.
Thermal Expansion Valve −
Regulates air conditioning system refrigerant injected
into the evaporator.
Evaporator −
Heat exchanger that cools cabin air.
Evaporator Fan −
Induces airflow through evaporator.
Three Way Valve Duct Assembly −
Controls the flow of recirculated cabin air
or ambient air to the air conditioning system.
Three Way Valve Control Cable −
Controls position of the three way valve.
The compressor is mounted on the gearcase of the right hand engine. The condenser
is placed under the floor of the baggage compartment with its associated heat transfer
equipment. Fan−driven cooling air for the condenser is taken in and discharged
through grilles in the belly just below the aft cabin door. The evaporator occupies
the forward end of the upper cowling. The air conditioning system makes use of
the ventilation system’s ducting to direct the cooled air to cabin and cockpit, but
adds a manual valve to permit selection of fresh or recirculated air. The knob for
this push/pull control is on the rear cockpit wall above the pilot’s right shoulder.
The other air conditioner controls are located on the Utility panel
.
Содержание MD900 with PW206E
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