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The following illustration provides an example of control wiring connections when using a standard thermostat.
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.
TYPICAL CONTROL WIRING
Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.
A - Run 24VAC control wires through hole with grommet.
B - Make 24VAC thermostat wire connections to CMC1.
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16
HIGH VOLTAGE
FIELD WIRING
Thermostat
R
POWER
C
COMMON
W1
1ST. STAGE AUX.
HEAT
G
INDOOR BLOWER
O
Y1
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
NOTE - Wire tie provides low voltage wire strain relief and maintains separation of field-installed low and high voltage circuits.
Start-Up Procedure
1.
Check to ensure:
• Service valve and gage port caps are installed and
tightened.
• Voltage supply at unit agrees with nameplate rating.
• Field wiring connections are tight and factory wiring
has not been disturbed and are tight.
• Indoor fan motor is on correct speed tap.
2.
Set thermostat selector switch to OFF and fan control
switch to "Auto" is so equipped.
3.
Close electrical disconnects to energize system.
4.
Set room thermostat at desired temperature. Be sure
set point is below indoor ambient temperature.
5.
Set the system switch of the thermostat on COOL
(or HEAT if applicable) and fan switch for continuous
operation (ON) or AUTO, as desired. There will be
a 5 minute short cycle compressor delay on startup.
Operate unit for 15-20 minutes, then check the system
refrigerant charge.
Page 12 of 21
ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING
AWG# INSULATION TYPE
18
TEMPERATURE RATING
35ºC MINIMUM.
LOW VOLTAGE
FACTORY
FIELD WIRING
WIRING
Low Voltage Wiring
Indoor Unit
R
POWER
C
COMMON
W1
1ST. STAGE AUX.
HEAT
W2
W3
G
REVERSING VALVE
COMPRESSOR
NOTE - Do not bundle any excess 24VAC control wires inside control panel.
NOTE - For proper voltages, select thermostat wire (control wires) gauge per
table below.
Low Voltage Wiring (with Auxiliary Heat)
Thermostat
R
POWER
C
COMMON
Outdoor Unit
E
EMERGENCY
R
W1
C
1ST. STAGE AUX.
W1
G
INDOOR BLOWER
O
Y1
O
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
Y1
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Figure 5.
6.
Adjust refrigerant charge per "Adjusting Charge"
section.
Adjusting Charge
Factory charge is shown on the rating label located on the
access panel.
All split system heat pumps are factory charged for 15
feet of connecting line set and matched indoor fan coil.
Nameplate refrigerant charge should initially be adjusted
for line set lengths other than 15 feet. For line sets shorter
than 15 feet in length, remove charge. For line sets longer
than 15 feet, add charge. Oil charge is sufficient for all line
lengths.
Liquid Line Diameter
* Factory charge for series is for 15' (ft.) line sets and
matched fan coil.
Issue 2225
Indoor Unit
R
POWER
C
COMMON
EMER.
HEAT
HEAT
RELAY
OUTDOOR
T'STAT
W1
1ST. STAGE AUX.
W2
HEAT
HEAT
W3
G
REVERSING VALVE
COMPRESSOR
Refrigeration Charge Adjustment
Oz. Per Linear Foot
3/8"
Table 4.
Outdoor Unit
R
C
W1
O
Y1
0.6
508270-01
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