U-5~18MX4XPQ
Urban Multi air conditioner
4PW28163-1
Installation manual
14
Fixing transmission wiring (See figure 23)
Inside switchbox
Outside unit
Sequential start
The outdoor unit PC board (A1P) is factory set at "Sequential start
available".
Setting the cool/heat operation
1
Performing cool/heat setting with the remote controller
connected to the indoor unit.
Keep the cool/heat selector switch (DS1) on the outdoor unit PC
board at the factory setting position IN/D UNIT. (See figure 22)
2
Performing cool/heat setting with the cool/heat selector.
Connect the cool/heat selector remote controller (optional) to the
A/B/C terminals and set the cool/heat selector switch (DS1) on
the outdoor unit PC board (A1P) to OUT/D UNIT. (See figure 25)
8.8.
Field line connection: power wiring
The power cord must be clamped to the plastic bracket using field
supplied clamp material.
The green and yellow striped wrapped wires must be used for
grounding. (See figure 21)
1
Heating/cooling switching remote control cord (when a heating/
cooling switch remote control (optional) is connected) (ABC) (not
for U-5~18MX4)
2
Fix to the indicated plastic brackets using field supplied clamping
material.
3
Wiring between the units (Outdoor - outdoor) (F1+F2 right)
4
Wiring between the units (Indoor - outdoor) (F1+F2 left)
5
Wiring for multi connection (only for U-20~54MX4) (Q1+Q2)
6
Plastic bracket
■
Be sure to follow the limits below. If the unit-to-unit
cables are beyond these limits, it may result in
malfunction of transmission.
-
Maximum wiring length:
1000 m
-
Total wiring length:
2000 m
-
Maximum interunit wiring length
between outdoor units:
30 m
-
Transmission wiring to cool/heat
selector:
500 m
-
Maximum number of branches:
16
■
Maximum number of outdoor units connectable: 10.
■
Up to 16 branches are possible for unit-to unit cabling.
No branching is allowed after branching.
(See figure 16)
■
Never connect the power supply to transmission
wiring terminal block. Otherwise the entire system
may break down.
■
Never connect 400 V to the terminal block of the
interconnecting wiring. Doing so will break the entire
system.
-
The wiring from the indoor units must be
connected to the F1/F2 (In-Out) terminals on the
PC board in the outdoor unit.
-
After installing the interconnecting wires inside the
unit, wrap them along with the on-site refrigerant
pipes using finishing tape, as shown in figure 12.
For the above wiring, always use vinyl cords with 0.75
to 1.25 mm
2
sheath or cables (2-core wires). (3-core
wire cables are allowable for the cooler/heater
changeover remote controller only.)
1
Outdoor unit
2
Indoor unit
3
Main line
4
Branch line 1
5
Branch line 2
6
Branch line 3
7
No branch is allowed after branch
8
Central remote controller (etc...)
A
Transmission wiring between outdoor unit and indoor
unit(s)
B
Transmission wiring between outdoor units
1
Liquid pipe
2
Gas pipe
3
Insulator
4
Interconnecting wiring
5
Finishing tape
■
Be sure to keep the power line and transmission line
apart from each other.
■
Be careful about polarity of the transmission line.
■
Make sure that the transmission line is clamped as
shown in figure 23.
■
Check that wiring lines do not make contact with
refrigerant piping.
■
Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
■
When you do not use a wire conduit, be sure to
protect the wires with vinyl tubes etc, to prevent the
edge of the knock-out hole from cutting the wires.
1
Remote controller
1
Cool/heat selector
For low-noise operation, it is necessary to get the optional
'External control adaptor for outdoor unit' (DTA104A61/62).
For details, see the installation manual attached to the
adaptor.
1
Power supply (400 V, 3 N~50 Hz)
2
Fuse
3
Earth leakage breaker
4
Grounding wire
5
Power supply terminal block
6
Connect each power wire
RED to L1, WHT to L2, BLK to L3 and BLU to N
7
Ground wire (GRN/YLW)
8
Clamp the power wire to the plastic bracket using a field supplied
clamp to prevent external force being applied to the terminal.
9
Clamp (field supply)
10
Cup washer
11
When connecting the earth wire, it is recommended to perform
curling.
■
Do not allow the ground wires to contact the
compressor lead wires. If the wires contact each
other, adverse effects may occur to other units.
■
When connecting or disconnecting a power supply
cord, make sure that the current-carrying conductors
become taut before the earthing conductor.
Содержание U-10MX4XPQ
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