Electrical Wiring; Line Voltage Wiring - Amana PHB**C Service Instructions Manual

PRODUCT DESIGN
The single phase units use permanent split capacitors (PSC)
design compressors. Starting components are therefore not
required. A low MFD run capacitor assists the compressor
to start and remains in the circuit during operation.
The outdoor fan and indoor blower motors are single phase
capacitor type motors.
Air for condensing (cooling cycle) or evaporation (heating
cycle) is drawn through the outdoor coil by a propeller fan,
and is discharged vertically out the top of the unit. The out-
door coil is designed for .0 static. No additional restriction
(ductwork) shall be applied.
Conditioned air is drawn through the filter(s), field installed,
across the coil and back into the conditioned space by the
indoor blower.
Package Heat Pump indoor sections are designed to accept
optional components such as auxiliary electric heaters and
circuit breakers. Provisions for these components have been
made at time of manufacture.
Some models of package units use the Compliant Scroll com-
pressor, there are a number of design characteristics which
are different from the traditional reciprocating compressor.
- Due to their design Scroll compressors are inherently more
tolerant of liquid refrigerant. NOTE: Even though the com-
pressor section of a Scroll compressor is more tolerant
of liquid refrigerant, continued floodback or flooded start
conditions may wash oil from the bearing surfaces caus-
ing premature bearing failure.
- These Scroll compressors use white oil which is compat-
ible with 3GS. 3GS oil may be used if additional oil is
required.
- Phase 1 Scroll compressors (ZR**K1 or ZR**K2), the com-
pressor may run backwards (noisy operation) for 1 or 2
seconds at shutdown. This is normal and does not harm
the compressor.
- Phase 2 Scroll compressors (ZR**K3). On shutdown, the
scroll flanks will separate allowing the compressor to
equalize internally within 0.4 seconds after shutdown.
- Operating pressures and amp draws may differ from stan-
dard reciprocating compressors. This information may
be found in the "Cooling Performance Data" section.
The scroll is a simple compression concept first patented in
1905. A scroll is an involute spiral which, when matched
with a mating scroll form as shown (next page), generates a
series of crescent shaped gas pockets between the two mem-
bers.
During compression, one scroll remains stationary (fixed scroll)
while the other form (orbiting scroll) is allowed to orbit (but
not rotate) around the first form.
20
As this motion occurs, the pockets between the two forms
are slowly pushed to the center of the two scrolls while si-
multaneously being reduced in volume. When the pocket
reaches the center of the scroll form, the gas, which is now
at a high pressure, is discharged out of a port located at the
center.
During compression, several pockets are being compressed
simultaneously, resulting in a very smooth process. Both
the suction process (outer portion of the scroll members)
and the discharge process (inner portion) are continuous.

ELECTRICAL WIRING

T
O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT MUST BE
PROPERLY POLARIZED AND GROUNDED.
HIGH VOLTAGE
T
O AVOID ELECTRICAL SHOCK, INJURY OR DEATH,
ALL
DISCONNECT ELECTRICAL POWER BEFORE
CHANGING ANY ELECTRICAL WIRING TO THIS UNIT.
The units are designed for operation on 60 hertz current and
at voltages as shown on the rating plate. All internal wiring in
the unit is complete. It is necessary to bring in the power
supply to the pigtails or power block, which is located in the
junction box or circuit breaker box assembly (or compressor
contactor on package gas units) , as shown on the unit wir-
ing diagram which is supplied with the unit. The 24V wiring
must be connected between the unit control panel and the
room thermostat.

LINE VOLTAGE WIRING

Power supply to the furnace must be N.E.C. Class 1, and
must comply with all applicable codes. The furnace must be
electrically grounded in accordance with the local codes or,
in their absence, with the latest edition of the National Elec-
trical Code, ANSI/NFPA No. 70, or in Canada, Canadian Elec-
trical Code, C22.1, Part 1. A fused disconnected must be
provided and sized in accordance with the unit minimum cir-
cuit ampacity.
WARNING
WARNING