Condenser Installation; Condenser Door Actuator; Condenser Assembly Rigging Instructions - Piper Dakota Maintenance Manual

CONDENSER INSTALLATION

1. Install condenser core to frame assembly with hose fittings forward and up.
2. Place condenser and frame assembly to fuselage frame mounting bracket and insert 8 screws into
piano hinge.
3. Attach side hinges and actuating rod and rig per Condenser Assembly Rigging Instructions.
4. Seal and couple hose fittings (seal with Loctite refrigerant sealant applied to flanges only).
5. Adjust condenser in accordance with Condenser Assembly Rigging Instructions.
Whenever it is necessary to remove cabin rear panel, replace and
seal it in the original manner. Improper seals can allow
dangerous exhaust gas to seep into cabin.
6. Seal all around forward cover panel (and aft cover panel if removed) with Permagum Bead No. 576
purchased from Prestolite Engineering Company. (See figure 21-13,)
7. Make a carbon monoxide test on ground and in flight with and without air conditioner operating.
Presence of CO may not exceed 1 part in 20,000.

CONDENSER DOOR ACTUATOR

The condenser door actuator is mounted on a bracket between two bulkheads in tail cone. It is coupled to
condenser assembly through a bellcrank mounted to a bracket on bulkhead aft of condenser. The actuator
travel is controlled by two limit switches. Both up and down switches are located on actuator. Refer to figure
21-13 for switch locations.
CONDENSER ASSEMBLY RIGGING INSTRUCTIONS (figure 21-13)
The condenser assembly is actuated by an electric motor through bellcranks, push rods, and limit switches.
It is necessary for condenser door to fit flush with fuselage skin, and with increased force along its forward
edge. Rig condenser assembly as follows:
1. Adjust open limit switch to open condenser door 5.00 +/- 0.50 inches when measured from leading
edge of door to fuselage skin.
2. Adjust side push rods so that a vertically measured gap of 0.16 of an inch exists along trailing edge of
door at instant forward edge of door becomes flush with fuselage skin.
3. With door fully closed, adjust CLOSED limit switch so that actuator travel an additional 0.12 of an
inch after door is fully closed. This is necessary to preload mechanism. (Refer to figure 21-13, view A-
A,)
4. Cycle assembly several times to be certain it operates properly without binding.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
—WARNING—
1G23
21 - 55 - 00
Page - 21 - 33
Reissued: August 1, 1986