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FIGURE4
SCROLL
HOW A SCROLL WORKS
SUCTION
SUCTION
SUCTION
MOVEMENT OF ORBIT
STATIONARY SCROLL
ORBITING
CRESCENT
SHAPED GAS
HIGH
PRESSURE
GAS
DISCHARGE
FLANKS
SEALED BY
CENTRIFUGAL
FORCE
1
2
3
4
SUCTION
INTERMEDIATE
PRESSURE
GAS
SUCTION
III−UNIT COMPONENTS
A−Transformer
The contactor coil, time delay and temperature sensor
are all energized by 24VAC supplied by the indoor unit.
All other controls in the outdoor unit are powered by line
voltage. Refer to unit wiring diagram. The HS26 is not
equipped with an internal line voltage to 24V transform
er.
B−Contactor
The compressor is energized by a contactor located in the
control box. Early model units use single−pole contactors.Late
model single−phase units use single pole and two−pole con
tactors. See wiring diagrams for specific unit. Late model
three−phase units use three−pole contactors. The contactor is
energized by indoor thermostat terminal Y when thermostat
demand is present.
CAUTION
Some HS26 units use single−pole contactors. One
leg of the compressor, capacitor and condenser
fan are connected to line voltage at all times. Po
tential exists for electrical shock resulting in inju
ry or death. Remove all power at disconnect be
fore servicing
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect electronic
components. Take precautions during unit instal
lation and service to protect the unit’s electronic
controls. Precautions will help to avoid control
exposure to electrostatic discharge by putting
the unit, the control and the technician at the
same electrostatic potential. Neutralize electro
static charge by touching hand and all tools on an
unpainted unit surface before performing any
service procedure.
