4
sun, television, etc. Consult the Instruction Sheet pack-
aged with thermostat for mounting instructions.
WARNING
To avoid death or personal injury due to
electrical shock, disconnect the electrical
power before electrically connecting the
unit.
Thermostat Wiring
When an electric heater is installed, the thermostat wiring
will be made at the heater accessory box.
If a unit is installed without electric heaters, the low voltage
wiring can be made at the control box.
See the unit wiring diagram for electrical connections.
C/X G Y R O W W1 W2
C/X G Y R O W1 W2 E
ROOM THERMOSTAT
OUTDOOR UNIT
PC__C02E
Wiring shown is for D9945804 (THSMEC1H2BA) thermostat.
C/X G Y R O W W1 W2
C/X G Y R O W2 E
ROOM THERMOSTAT
OUTDOOR UNIT
PC__C02E
Wiring shown is for 10636701(THSADC1H2BA) or
10636702 (THSMDC1H2BA) thermostat
Figure 2
Typical Thermostat and Unit 24 Volt Wiring
Hookup
Electrical Connections
Note: The units are designed for operation on 60 Hz current
and at the voltages shown on the rating plate. All internal
wiring in the unit is complete. The power supply maybe
brought into the contactor (refer to unit wiring diagram
supplied with unit). Ensure 24 volt wiring is connected
between the unit control panel and the room thermostat.
Refer to Figure 2 for proper thermostat wiring and Figure 3
for location of the low voltage terminal board.
Refer to the unit wiring diagram for electrical connections.
When installed, the unit must be electrically grounded in
accordance with local codes or in the absence of local
codes, with the National Electrical Code, ANSI/NFPA No.
70, and/or the CSA C22.1 Electrical Code, if an external
source is utilized.
WARNING
To avoid death or personal injury due to
electrical shock, wiring to the unit must be
properly grounded.
CAUTION
To avoid personal injury or property
damage due to fire, use only copper
conductors.
CAUTION
To prevent improper and dangerous
operation due to wiring errors, label all
wires prior to disconnection when servicing
controls. Verify proper operation after
servicing.
The best protection for the wiring is the lowest rated fuse or
circuit breaker which will supply power to the unit during
normal operation without nuisance trips. Such a device will
provide maximum circuit protection. DO NOT EXCEED
THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN
ON UNIT DATA PLATE.
All line voltage connections must be made through weath-
erproof fittings. All exterior power supply and ground wiring
must be in approved weatherproof conduit. Low voltage
wiring from the unit control panel to the thermostat requires
coded cable.
FLEXIBLE WIRING SETUP WITH ELECTRIC HEATER
Line and low voltage wiring can enter the unit from either
side.
ELECT.
CONTROL
BOX
EVAP
COIL
COMPRESSOR
LOW
VOLTAGE
REAR VIEW
SIDE VIEW
ELECTRICAL
SIDE VIEW
BLOWER
ELECTRICAL
SUPPLY
AIR
RETURN
AIR
HEATER
KIT
NOTE: PCC24-42
OPENINGS SHOWN
For knockout locations, see dimension drawing on the
Specification Sheet . Use the Single Point wiring kit to add
further flexibility to the installation wiring.
Unit Voltage
The unit transformer is factory connected for 230V opera-
tion. If the unit is to operate on 208V, reconnect the
transformer primary lead as shown on the unit wiring
diagram.
Vl. Circulating Air and Filters
Airflow Conversion
Units can easily be converted from horizontal to vertical
airflow delivery.
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