THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 41
Jun 1/03
2E5
21-50-00
J. Evaporator
(1) Removal
CA
UTION: DISCHARGE THE SYSTEM BEFORE DISASSEMBLING ANY COMPONENTS
FOR SERVICE.
CA
UTION: UNITED STATES ENVIRONMENTAL REGULATIONS PROHIBIT THE RELEASE
OF REFRIGERANT INTO THE ATMOSPHERE. SPECIAL EQUIPMENT IS
REQUIRED WHEN DISCHARGING OR RECHARGING SYSTEM.
Evaporator assembly consists of evaporator core, receiver-dehydrator, expansion valve,
circulating fan, pressure switch, necessary housing, and plumbing. The housing is made of
thermoplastic material and the condensed moisture is dumped overboard through a hose
clamped to fitting on bottom of evaporator housing.
Evaporator assembly is behind cabin rear closeout panel, attached to mounting panel with 12
screws, washers, and a bracket securing the back to mounting panel.
(1) Remove air conditioning filter cover, filter, and rear access panels.
(2) Uncouple the liquid line from inlet side of receiver-dehydrator and suction line from
evaporator core outlet (see Special Servicing Procedures, paragraph 3.B, above).
(3) Disconnect related electrical wires.
(4) Remove flexible air duct from housing outlet and remove drain hose from housing.
(5) Remove temperature probe from evaporator housing.
(6) Remove screws attaching support bracket and evaporator housing to mounting panel.
(7) Remove assembly through access hole in bulkhead.
(2) Installation
(1) Cement gasket in place on flanges of evaporator housing and attach large end of
mounting gasket to back of housing.
(2) Install housing through access hole with air duct outlet on top and mate mounting flanges
to surface of mounting panel and insert screws (Do not tighten at this time).
(3) Line mounting bracket with mating holes in mounting panel, insert screws and tighten.
Tighten screws in flange and check that the gasket is in place, flange seal must be air
tight.
(4) Couple suction and discharge lines to their proper fittings (apply Loctite refrigerant sealant
to tube flares only).
(5) Evacuate and charge system per paragraph 3.C or 3.D, above.
(6) Check for leaks (see Leak Detection, paragraph 3.C or 3.D, above). If no leaks are
detected, seal, and install access panel on evaporator housing.
(7) Couple flexible air duct and drain tube.
(8) Make and check electrical connections (see 91-21-50, Figure 1).
(9) Check blower operation and refrigerant systems.
(10) Install rear closeout panel.
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