Page 26
Typical Field Wiring
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
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.
CONTROL WIRING
NOTE — Wire tie provides low voltage control wire strain relief and to maintain
separation of field installed low and high voltage circuits.
NOTE — For proper voltages, select thermostat wire (control wires) gauge per
table above
.
NOTE — Do not bundle any excess 24VAC control wires inside control panel.
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)
W1
Y
G
C
R
Y
G
C
THERMOSTAT
INDOOR UNIT
POWER
HEA
T
COOLING
INDOOR
BLOWER
COMMON
OUTDOOR
UNIT
Y1
C
W
R
THREE PHASE
CONTROL
WIRING
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
GROMMET
AND WIRE TIE
HIGH VOLTAGE
FLEXIBLE CONDUIT
A
B
GN
D
GROMMET
WIRE
NUTS
Typical Field Wiring Diagram (Y and G Voltages)
Typical Field Wiring Diagram (J Voltage)
FIGURE 17. Typical Field Wiring
NOTE
–
The thermostat used may be electromechanical
or electronic
.
NOTE
–
Transformer in indoor unit supplies power (24
VAC) to the thermostat and outdoor unit controls.
COOLING
:
1. Cooling demand initiates at Y1 in the thermostat.
2. 24VAC from indoor unit (Y1) energizes the TOC timed
off control (if used) which energizes contactor K1 (pro
-
vided S4 high pressure switch is closed).
3. K1-1 N.O. closes, energizing compressor (B1) and out-
door fan motor (B4).
4. Compressor (B1) and outdoor fan motor (B4) begin im-
mediate operation..
END OF COOLING DEMAND:
5. Cooling demand is satisfied. Terminal Y1 is de-ener
-
gized .
6. Compressor contactor K1 is de-energized.
7. K1-1 opens and compressor (B1) and outdoor fan mo-
tor (B4) are de-energized and stop immediately
Servicing Units Delivered Void of Charge
If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1 - Leak test the system using the procedure outlined
on page 18.
2 - Evacuate the system using procedure outlined on
page 19.
3 - Use nitrogen to break the vacuum and install a new
filter drier in the system.
4 -
Evacuate the system again using procedure
outlined on page 19.
5 - Weigh in refrigerant using procedure outlined in
figure
20.
