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connecting refrigerant tubing between the indoor
& outdoor unit
caution:
When servicing, cover or seal openings to
minimize the exposure of the refrigerant system
to air to prevent accumulation of moisture and
other contaminants.
After outdoor and indoor unit placement has been
determined, route refrigerant tubing between the
equipment in accordance with sound installation practices.
• 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 accor-
dance with the manufacturer's installation instructions
• These units are equipped with single shot quick connect
couplings. Together with the indoor section and line set,
only four coupling connections are required to provide
a 100% sealed system.
- Route the suction line and liquid line between indoor
and outdoor sections, remove protector caps and
plugs
- Lubricate entire surface of the diaphragm O-ring
and threads of the male coupling using the lubricant
supplied with the line set and a small brush.
4
- Make sure the coupling halves are held in proper
alignment with each other prior to starting the threads
of female coupling nut onto the male half. Thread
coupling halves together by hand until a definite
resistance is felt.
- Using a marker, mark a line from the coupling union
nut to the bulkhead then tighten an addition wrench
flat (60°). See Table 1 for torque values. Repeat for
all couplings.
Coupling
Torque
Size
3/8"
10-12 Ft-Lbs
(10mm)
(14-16 Nm)
3/4"
35-45 Ft-Lbs
(19mm)
(47-61 Nm)
7.8"
10-12 Ft-Lbs
(22mm)
(14-16 Nm)
table 1. torque Values
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 (Figure 8 page 13). 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.
Female
Female
Male
Coupling
Coupling
Coupling
Nut
Body
3/4"
11/16"
5/8"
1-1/8"
1-5/16"
1"
1-1/8"
1-5/16"
1"
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