System Component Description And Operation - Safran PILATUS PC12 M19 Manual

2.3. System Component Description and Operation:

The R-134A air conditioning system installed on the Pilatus PC12 M19 Aircraft uses the
following major system components:

Direct Drive Compressor Module

Evaporator Module Assembly

Condenser Coil Assembly w/Receiver Dryer

Axial Condenser Fan
2.3.1. The direct drive compressor module has a rated cooling capacity of 17,000 BTUH when
operating with the other components in the Pilatus PC12 M19 Aircraft at an ambient
temperature of 95°F OAT. Under this condition, the current draw is limited to 105 AMPS at
28 VDC.
The Compressor Module Assembly is packaged to meet the aircraft installation
requirements and contains the following major components:
• Brushless Compressor Drive Motor
• Compressor Assembly
Brushless Motor Controller
•
2.3.1.1.
compressor shaft via a coupling allowing for direct speed control of the compressor.
2.3.1.2.
displacement of 65 CC/Rev and is to only be used with R134a refrigerant and RL-46H
refrigerant oil.
2.3.1.3.
following features to ensure safe operation.
 Run Signal – Reports Normal Operation
 Over Temperature Shutdown – Fail Signal
 Locked Rotor Detection – Fail Signal
 Hall Sensor Failure – Fail Signal
 Motor Field Winding Short – Fail Signal
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BRUSHLESS COMPRESSOR DRIVE MOTOR: The drive motor is attached to the
COMPRESSOR ASSEMBLY: The compressor assembly is a 3d scroll type with a
BRUSHLESS MOTOR CONTROLLER: The motor controller is provided with the
Original Release
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