Piper Malibu PA-46-310P Pilot Operating Handbook page 471

SECTION 9
SUPPLEMENT 13
PIPER AIRCRAFT CORPORATION
PA-46-JlOP, MALIBU
SECTION 6 - WEIGHT AND BALANCE
Factory installed optional equipment is included in the licensed weight
and. balance data in Section 6 of the Pilofs Operating Handbook.
U
. For field installation of the Supplemental Electric Heater add 1.10
pounds at 120.5 inches aft of datum. Increase moment 133 inch-pounds.
SECTION 7 - DESCRIPTION AND OPERATION
The Supplemental Electric Heater (Heater) consists of a resistance type
heat element, dual hermetically sealed bimetallic type overtemperature
protection, power relay, fuse, and lighted on-off switch. The element is
installed in the left bleed air duct forward of the pressure bulkhead
downstream from the vent/ defog fan. Both the heater switch and the
vent/ defog switch must be engaged to supply power to the heater element.
1l1e vent/ defog fan can be operated independent of the heater by engaging
just the vent/ defog switch.
Both the heater control circuit and the vent/ defog fan circuit utilize the
10 amp VNT-DFG circuit breaker located on the ENVIRONMENTAL
circuit breaker panel. Heater element power is supplied from the battery
master solenoid through the 35 amp heater fuse and the heater power relay.V
The 35 amp heater fuse is not accessible to the pilot. The electrical load
imposed by the heater and the vent/ defog fan is 40.35 amps. Installation is
limited to aircraft equipped with dual alternators. Emergency interruption
of the circuit can be accomplished by disengaging the battery master switch
and engaging the emergency bus switch.
A low voltage monitor system is included with the Heater. This system
alerts the pilot to a tow bus voltage condition before the battery is
discharged. The system consists of a tow voltage monitor module located
behind the instrument panel, and an annunciator light mounted above the
clock on the pilot's instrument panel (refer to Figure
7-1).
The annunciator is the press to test type. The light lens is red with the
words LO BUS marked on it in black. Power is supplied to the low voltage
monitor system from the emergency bus through a 5 amp fuse. The LOB US
· annunciator is activated when the bus voltage drops below 25.0 + f.-0.3 volts.
When the bus voltage goes above the warning light activation point the Ln,
J
BUS annunciator is extinguished. The annunciator is tested by pressing on.._.,.
the LO BUS warning light causing it to illuminate. LO BUS annunciator
dimming is controlled by the day/night switch.
I
REPORT: VB-1200
9-116, 4of6
ISSUED: OCTOBER 27, 1987