Nortek 024KA, Руководство по установке

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4
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.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing.
• 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 length is 75 feet, and the vertical elevation difference
between the indoor and outdoor sections should not
exceed 20 feet.
• If precise forming of refrigerant lines is needed, a copper
tubing bender is recommended. Avoid sharp bends and
contact of the refrigerant lines with metal surfaces.
These units are equipped with single shot quick connect
couplings. Together with the indoor section and line set,
only 4 coupling connections are needed to provide a
100% sealed system.
1. Route the suction line and liquid line between indoor
and outdoor sections, remove protector caps and plugs
2. 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.
3. Make sure that 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 hand tight.
caution:
to prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. do not over tighten!
4. Using two wrenches, tighten the coupling halves until
seated or a definite resistance is felt.
5. Using a marker, mark a line from the coupling union
nut to the bulkhead then tighten an additional 1/6 turn.
See
Table 1 for torque values. Repeat for all couplings.
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 high and low
voltage wiring.
√
Verify factory wiring is in accordance with the unit wiring
diagram. Inspect for loose connections. See Figure 8
(page 14) .
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
Coupling
Size
Torque
Male
Coupling
Female
Coupling
Nut
Female
Coupling
Body
3/8” (10mm)
10-12 Ft-Lbs
(14-16 Nm)
3/4” 11/16” 5/8”
3/4” (19mm)
35-45 Ft-Lbs
(47-61 Nm)
1-1/8” 1-5/16” 1”
7.8” (22mm)
10-12 Ft-Lbs
(14-16 Nm)
1-1/8” 1-5/16” 1”
table 1. Torque Values