4
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be flowing through the
joints during brazing to prevent internal oxidation and
scaling.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing. If precise forming of refrigerant lines is
required, a copper tubing bender is recommended. Avoid
sharp bends and contact of the refrigerant lines with metal
surfaces.
• Refrigerant tubing should be supported in a manner
that the tubing will not vibrate or abrade during system
operation.
• Tubing should be kept clean of foreign debris during
installation.
• Every effort should be made by the installer to ensure
that the field installed refrigerant containing components
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• The maximum recommended interconnecting refrigerant
line lengths is 75 ft. and the vertical elevation difference
between the indoor and outdoor sections should not
exceed 20 ft.
• A filter dryer is provided with the unit and must be
installed in the liquid line of the system. If the installation
replaces a system with a filter dryer already present in the
liquid line, the filter dryer must be replaced with the one
supplied with the unit. The filter dryer must be installed
in strict accordance with the manufacturer’s installation
instructions.
• Optional equipment such as liquid line solenoid valves,
low ambient, etc., should be installed in strict accordance
with the manufacturer’s installation instructions.
ELECTRICAL WIRING
WARNING:
To avoid risk of electrical shock, personal
injury, or death, disconnect all electrical power
to the unit before performing any maintenance
or service. The unit may have more than one
electrical supply.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause
improper and dangerous operation.
• All electrical connections must be in compliance with
all applicable local codes and ordinances, and with
the current revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√
Verify that the voltage, frequency, and phase of the supply
source match the specifications on the unit rating plate.
√
Verify that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment.
Refer to the unit wiring label for proper voltage wiring.
√
Verify factory wiring is in accordance with the unit wiring
diagram See
,
, &
. Inspect for loose
connections.
Line Voltage
• A wiring diagram is located on the inside cover of the
electrical box of the outdoor unit. The installer should
become familiar with the wiring diagram before making
any electrical connections to the outdoor unit.
•
An electrical disconnect must be located within sight
of and readily accessible to the unit
. This switch shall
be capable of electrically de-energizing the outdoor unit.
• Line voltage to the unit should be supplied from a dedicated
branch circuit containing the correct fuse or circuit breaker
for the unit. Incoming field wiring and minimum size of
electrical conductors and circuit protection must be in
compliance with information listed on the outdoor unit
data label. Any other wiring methods must be acceptable
to authority having jurisdiction.
• The outdoor unit requires both power and control circuit
electrical connections. Refer to the wiring diagram /
schematic for identification and location of outdoor unit
field wiring interfaces See
,
,
, &
. Make
all electrical connections in accordance with all applicable
codes and ordinances.
• Overcurrent protection must be provided at the branch
circuit distribution panel and sized as shown on the unit
rating label and according to applicable local codes. See
the unit rating plate for minimum circuit ampacity and
maximum overcurrent protection limits.
• Provide power supply for the unit in accordance with the
unit wiring diagram, and the unit rating plate. Connect the
line-voltage leads to the terminals on the contactor inside
the control compartment.
• Use only copper wire for the line voltage power supply to
this unit in strict accordance of the NEC (ANSI/NFPA 70),
applicable local codes, and the instructions provided with
the equipment. Use proper code agency listed conduit
and a conduit connector for connecting the supply wires
to the unit. Use of rain tight conduit is recommended.
• 208/230 Volt units are shipped from the factory wired for
230 volt operation. For 208V operation, remove the lead
from the transformer terminal marked 240V and connect
it to the terminal marked 208V.
• Optional equipment requiring connection to the power or
control circuits must be wired in strict accordance of the
NEC (ANSI/NFPA 70), applicable local codes, and the
instructions provided with the equipment.
CoreSense
TM
Diagnostics Module
(Select Models Only)
The CoreSense
TM
Diagnostics Module (
) is a
breakthrough innovation for troubleshooting heat pump and
air conditioning system failures. The module installs easily
in the electrical box of the outdoor unit near the compressor
contactor.By using the compressor as a sensor, CoreSense
Diagnostics helps the service technician more accurately
troubleshoot system and compressor fault conditions.
A flashing LED indicator communicates the ALERT code
and a diagnostic key is also imprinted on the side of the
module to quickly direct the technician to the root cause of
