Pressure Relief Switch; Removal And Installation Of Pressure Relief Switch; Electrical Installation; Fuse Replacement - Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual

PIPER CHEROKEE WARRIOR SERVICE MANUAL
14.39. PRESSURE RELIEF SWITCH. (Refer to Figure 14-13.)

14-40. REMOVAL AND INSTALLATION OF PRESSURE RELIEF SWITCH.

Before relief switch removal, air conditioning system must be
discharged. (Refer to paragraph D, 5, Discharging.)
United States environmental regulations prohibit the release of
refrigerant into the atmosphere. Special equipment is required
when discharging or recharging system.
a. Remove electrical connections from switch.
b. Remove switch assembly from service port on steel line.
c Apply sealant sparingly to flare.
d. Install new switch.
e. Charge system.

14-41. ELECTRICAL INSTALLATION.

The wiring harness is connected to switches in the climate control center on the right side of the
i n s t r ument panel. The harnesses cross the instrument panel to the left side where two (2) wires are taken off
for the compressor clutch. The harness then passes aft along the left side of the fuselage where it connects to
the blower motor, pressure relief switch and the condenser actuating motor. Three fuses located behind the air
conditioning system control panel and a 20 amp circuit breaker mounted in the circuit breaker panel protects
the complete air conditioning electrical system.

14-42. FUSE REPLACEMENT.

Locate the fuse to be replaced behind the air conditioning system control panel.
a. Open the fuse holder by applying a slight pushing and counterclockwise twisting pressure.
b. Remove blown fuse and insert a new 5 amp fuse
c. Close the fuse holder by applying a slight pushing and clockwise twisting pressure.
l4-43. ADJUSTMENT OF AIR CONDITIONING THROTTLE SWITCH.
The throttle switch is mounted forward and below the throttle arm. The switch must be adjusted to
actuate at the last quarter inch (6.35 mm) of full open throttle travel. Position the switch so that the throttle
arm contacts the center of the switch actuator button. When throttle is fully open (forward) it must not contact
switch body.

14-44. OVERHEAD VENT BLOWER.

14-45. OVERHEAD VENT BLOWER DESCRIPTION

The blower is mounted in the aft section of the fuselage and is connected to the overhead vent system.
On the PA-28-150, S/N's 28-7415001 and up, and on PA-28-161, S/N's 28-7716001 through 28-7916598 and
up, the blower draws air in from the dorsal fin, and forces it through the ducting.
The blower on the PA-28-161, S/N's 28-8016001 through 28-8616057, and 2816001 and up, is also
mounted in the aft section of the fuselage and is connected to the overhead vent system. But, on these models,
the blower draws air in from the left side of the fuselage and forces it through the ducting.
The blower switch is mounted on the instrument panel. On s/n's PA-28-150, s/n's 28-7415001 and up,
and on the PA-28-161, S/N'S 28-7716001 through 28-7916598, the switch has four positions providing three
blower speeds. The blower switch installed on PA-28-161, s/n' 28-8016001 through 28-8616057, and
2816001 provides only three position with two blower speeds.
Revised: February 28, 1995
— CAUTION —
— NOTE —

3B22

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