13
Heat insulation
(Be sure to insulate the tubing after finishing leak inspection.)
●
Be sure to insulate the tubing.
●
Wrap insulators (field supply) having a thickness of 10 mm
or more with heat resistance of 120 °C or more around the
discharge tubes and gas tubes, and insulators (field supply)
with Heat resistance of 80 °C or more around the suction
tubes and liquid tubes.
●
Use the supplied thermal insulation tape to bind the areas
where there are seams and gaps between the thermal
insulation that is wrapped around each tube.
●
Failure to conduct thermal insulation may cause water
leakage due to condensation.
3-6. Installing the Refrigerant Tubing
The size of the refrigerant tubing is as shown in the table below.
Table 3-1
10EAIRC 15EAIRC 20/25EAIRC
Gas tube
inch (mm)
Ø 5/8" (15.88)
(Brazing)
Ø 3/4" (19.05)
(Brazing)
Ø 7/8" (22.22)
(Brazing)
Liquid tube
inch (mm)
Ø 3/8" (9.52)
(Flare)
Ø 3/8" (9.52)
(Flare)
Ø 3/8" (9.52)
(Flare)
●
When brazing the gas tubing, cool the tubing with dampened
shopcloths as you work, as shown in the figure below, to
protect the unit’s thermistor from the heat generated by
brazing.
Thermistor (inside unit)
Dampenedshopcloths
Gas tubing
Fig. 3-15
●
Be sure to insulate both the gas tubing and liquid tubing.
In addition, wrap the supplied insulation material around
the tubing joints, and fasten in place with vinyl tape or other
means. Failure to insulate the tubing may result in water
leakage from condensation.
●
Plug all gaps at tube through-holes in the unit with insulation
or a similar substance to prevent air leakage.
●
When connecting air curtain type unit to a refrigerant system
where individual operation is possible, install 1 or 2 RAP
valve kits (CZ-P160RVK2) in parallel.
(For details on connecting the RAP valve kit, refer to the
manual that came with the kit.)
4. ELECTRICAL WIRING
4-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring closely
following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each unit
and a circuit breaker for overcurrent protection should be
provided in the exclusive line.
(3) To prevent possible hazards from insulation failure, the unit
must be grounded.
(4) Each wiring connection must be done in accordance with
the wiring system diagram. Wrong wiring may cause the
unit to misoperate or become damaged.
(5) Donotallowwiringtotouchtherefrigeranttubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsibility
for any damage or misoperation that occurs as a result of
such unauthorized changes.
(7) Regulations on wire diameters differ from locality to
locality. For field wiring rules, please refer to your LOCAL
ELECTRICALCODESbeforebeginning.
You must ensure that installation complies with all relevant
rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
● The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
● Use shielded wires for inter-unit control wiring between units
and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop designated by the
manufacturer, because special-purpose tools are required.
4-2. Recommended Wire Length and Wire Diameter
for Power Supply System
Indoor unit
Type
(B) Power supply
Time delay fuse or
circuit capacity
2.5 mm
2
EAIRC-MJ, EAIRC-MS Max. 130 m 10-16 A
Control wiring
(C) Inter-unit
(between
outdoor and
indoor units)
control wiring
(D) Remote
control wiring
(E) Control
wiring for
group control
(F) Inter-
Outdoor unit
control wiring
0.75 mm
2
(AWG #18)
Use shielded
wiring*
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
Use shielded
wiring
Max. 1,000 m Max. 500 m
Max. 200 m
(Total)
Max. 300 m
*
With ring-type wire terminal.
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