12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
www.enviro-ok.com
www.safran‐
passenger
‐solutions.com
Copyright © 2020
Original Release
ATA 21‐00‐60
Page | 13
2.3.2. CONDENSER COIL ASSEMBLY: The condenser coil assembly is an aluminum micro-
channel type. The coil heat rejection is 24,650 BTUH based on a 104°F inlet temperature.
This assembly requires airflow of 900 CFM for proper operation. Coil face areas must be
unrestricted at all times or system performance degradation will occur. This unit is provided
with a high pressure relief valve that will activate a 550±50 psi and closes at 435 psi
minimum.
2.3.2.1.
RECEIVER DRYER ASSEMBLY: The receiver-dryer assembly consists of a
refrigerant container, Schrader valve, and a binary pressure switch. The receiver-dryer is
constructed of aluminum alloy and contains a standpipe, wire filter, and desiccant. The
Schrader valve located in the container inlet port allows for the binary pressure switch to be
removed without venting the system refrigerant charge.
2.3.2.2.
BINARY PRESSURE SWITCH: The binary pressure switch performs two major
functions. The first function prevents the R-134A compressor from operating if the
system charge is lost or the ambient temperature is too low. The second function stops
the compressor from operating if the head pressure increases to an unsafe level. The
high pressure cutout is at 377±28.5 PSIG on rise and the low pressure cutout is at
28.5±2.85 PSIG falling.
2.3.3. EVAPORATOR MODULES: have a rated cooling capacity each of 8500 BTUH at an ambient air
temperature of 80° F (db), and 50% RH (relative humidity). The assembly provides an air flow up to
300 CFM (cubic feet per minute) in order to maintain these performance specifications.
The Evaporator Module Assembly is packaged to meet the aircraft installation requirements and
contains the following major components:
• Coil Assembly
• Blower Motor
• Blower Wheel
• Expansion Valve
2.3.3.1.
COIL ASSEMBLY: The coil is constructed of aluminum tube and aluminum fins with
aluminum support brackets made of 6061-T6. Air flow must be unrestricted at all times
or the design point will not be met.
