Page 23
13ACX SERIES
Any excess high voltage field wiring should be trimmed and
secured away from any low voltage field wiring. To facilitate a
conduit, a cutout is located in the bottom of the control panel.
Connect conduit to the control panel using a proper conduit fitting.
ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
WIRE RUN LENGTH
AWG# INSULATION TYPE
LESS THAN 100' (30 METERS)
18 TEMPERATURE RATING
MORE THAN 100' (30 METERS) 16 35ºC MINIMUM.
Install low voltage wiring from outdoor to indoor unit and from thermostat
to indoor unit as illustrated.
HIGH VOLTAGE / GROUND WIRES
CONTROL WIRING
A
Run 24VAC control wires through hole with grommet and secure with
provided wire tie.
B
Make 24VAC thermostat wire connections. Locate the two wires from the
contactor and make connection using field provided wire nuts:
Yellow to Y1
Black to C (common)
NOTE — For proper voltages, select thermostat wire (control wires)
gauge per table above
.
NOTE — Wire tie provides low voltage control wire strain relief and to
maintain separation of field installed low and high voltage circuits.
W1
Y
G
C
R
Y
G
C
THERMOSTAT
INDOOR UNIT
POWER
HEAT
COOLING
INDOOR
BLOWER
COMMON
OUTDOOR
UNIT
Y1
C
W
R
SINGLE PHASE
NOTE — Do not bundle any excess 24VAC control wires inside
control panel.
CONTROL
WIRING
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
GROMMET
AND WIRE TIE
HIGH VOLTAGE
FLEXIBLE CONDUIT
A
B
System Operation
IMPORTANT
Some scroll compressor have internal vacuum protector
that will unload scrolls when suction pressure goes
below 20 psig. A hissing sound will be heard when the
compressor is running unloaded. Protector will reset
when low pressure in system is raised above 40 psig. DO
NOT REPLACE COMPRESSOR.
The outdoor unit and indoor blower will cycle on and off as
dictated by demands from the room thermostat. When the
thermostat's blower switch is in the
ON
position, the indoor
blower will operate continuously.
MANUAL HIGH PRESSURE SWITCH (S4) - USED ON
MODELS 13ACX-XXX-230-01 THROUGH -09
Some 13ACX units are equipped with a manual
high‐pressure switch that is located in the liquid line of the
compressor as illustrated in figure on page 2 and figure 13
for the location of the manual reset button.
MANUAL RESET
BUTTON
Figure 13. High Pressure Switch (S4) Manual Reset
The switch is a Single Pole, Single Throw (SPST),
manual-reset switch which is normally closed and
removes power from the compressor when discharge
pressure rises above factory setting at 590 + 10 psi. The
manual-reset button can be identified by a red cap that is
press to preform the reset function.
AUTOMATIC HIGH PRESSURE SWITCH (S4) - USED
ON MODELS 13ACX-XXX-230-10 AND LATER
The 13ACX is equipped with an auto-reset high pressure
switch (single-pole, single-throw) which is located on the
liquid line. The switch shuts off the compressor when
discharge pressure rises above the factory setting. The
switch is normally closed and is permanently adjusted to
trip (open) at 590 + 15 psig (4068 + 103 kPa).
