508270-01M
Page 12 of 21
Issue 2225
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.
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.
Refrigeration Charge Adjustment
Liquid Line Diameter
Oz. Per Linear Foot
3/8”
0.6
* Factory charge for series is for 15’ (ft.) line sets and
matched fan coil.
Table 4.
The following illustration provides an example of control wiring connections when using a standard thermostat.
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
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
A -
Run 24VAC control wires through hole with grommet.
B -
Make 24VAC thermostat wire connections to CMC1.
NOTE -
For proper voltages, select thermostat wire (control wires) gauge per
table below
.
NOTE -
Wire tie provides low voltage wire strain relief and maintains separation of field-installed low and high voltage circuits.
NOTE -
Do not bundle any excess 24VAC control wires inside control panel.
TYPICAL CONTROL WIRING
R
C
W1
Y1
O
G
R
C
W1
W2
W3
G
REVERSING VALVE
Thermostat
Indoor Unit
R
C
W1
Y1
O
Outdoor Unit
POWER
COMMON
1ST. STAGE AUX.
HEAT
INDOOR BLOWER
COMPRESSOR
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
POWER
COMMON
1ST. STAGE AUX.
HEAT
Low Voltage Wiring
R
C
W1
Y1
O
G
R
C
W1
W2
W3
G
Thermostat
Indoor Unit
Outdoor Unit
E
R
C
W1
Y1
O
1ST. STAGE AUX.
HEAT
EMER.
HEAT
RELAY
OUTDOOR
T'STAT
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
REVERSING VALVE
POWER
COMMON
1ST. STAGE AUX.
HEAT
INDOOR BLOWER
COMPRESSOR
POWER
COMMON
EMERGENCY
HEAT
Low Voltage Wiring (with Auxiliary Heat)
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
Figure 5.
