Piper SARATOGA PA-32-301 Maintenance Manual page 146

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
I EVAPORATOR.
REMOVAL OF EVAPORATOR.
The evaporator assembly consists of the evaporator core. receiver-dehydrator. expansion valve.
circulating fan and pressure switch together with necessary housing and plumbing. The housing is fabricated
of thermoplastic material. The condensed moisture is dumped overboard through a hose clamped to a fitting
on the bottom of the evaporator housing.
The evaporator assembly is located behind the cabin rear panel. attached to the mounting panel w ith 1
screws and washers and a bracket securing the back to the mounting panel.
1. Remove air conditioning filter cover, filter and rear access panels.
- NOTE -
Discharge the system before disassembling any components for
service.
2. Uncouple the liquid line from the inlet side of the receiver-dehydrator and the suction line from the
evaporator core outlet. (See Special Servicing Procedures.)
3. Disconnect the related electrical wires.
4. Remove flexible air duct from housing outlet. Remove drain hose from housing
5 Remove temperature probe from evaporator housing.
6. Remove the screws attaching the support bracket and evaporator housing to the mounting panel
Remove the assembly through the access hole in the bulkhead.
INSTALLATION OF EVAPORATOR.
1. Cement gasket in place on the flanges of the evaporator housing and attach the large end of the
mounting gasket to the back of the housing.
2 Install the housing through the access hole with the air duct outlet on top. Mate the mounting flange
to the mating surface of the mounting panel and insert the screws. (Do not tighten at this time.)
3. Line up mounting bracket with mating holes in mounting panel. insert screws and tighten. Tighten
screws in the flange at this time. Be certain gasket is in place. The flange must have an air tight seal
4. Couple the suction and discharge lines to their respective fittings (apply Loctite refrigerant sealant to
tube flanges only).
5. Evacuate and charge system. (See Evacuating the System and Charging the System.)
6. Check for leaks (see Checking the System for Leaks) if no leaks are detected. Seal and install access
panel on evaporator housing.
7. Couple flexible air duct and drain tube.
21-58-24
Page 21-40
Revised: August 11. 1983
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