Daikin VRV IV RKXYQ8T7Y1B, Installation And Operation Manual

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5 Installation
Installation and operation manual
17
8T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1B – 2016.04
f GWP = Global warming potential
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO
2
-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2 Fix the label on the inside of the compressor unit. There is a
dedicated place for it on the wiring diagram label.
5.7 Connecting the electrical wiring
5.7.1 Field wiring: Overview
Field wiring consists of:
▪ Power supply (always including earth)
▪ Communication (= transmission) wiring between the compressor
unit, the heat exchanger unit, and the indoor units.
Example:
g
f
F1/F2
(16 V)
F1/F2
(16 V)
220-240 V
1~ 50 Hz
e
c
a
d
b
220-240 V
1~ 50 Hz
380-415 V
3N~ 50 Hz
a Main switch
b Earth connection
c Power supply wiring (including earth) (sheathed cable)
F1/F2 Transmission wiring (sh shielded cable) (using
shielded cable for the transmission wiring is mandatory for
5 HP, and optional for 8 HP)
d Compressor unit
e Heat exchanger unit
f Indoor unit
g User interface
Branches
No branching is allowed after branching.
D
B
C
b2
b3
c1
c2
b1
a
A
A Central user interface (etc...)
B Compressor unit
C Indoor unit
D Heat exchanger unit
a Main line. The main line is the line to which the
transmission wiring of the heat exchanger unit is
connected.
b1, b2, b3 Branch lines
c1, c2 No branch is allowed after branch
5.7.2 Guidelines when connecting the electrical
wiring
Tightening torques
Wiring Screw size Tightening torque
(N•m)
Power supply wiring
(power
shielded ground)
M5 2.0~3.0
Transmission wiring M3.5 0.8~0.97
5.7.3 To connect the electrical wiring on the
compressor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located on the switch box cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1 Remove the service covers of the compressor unit and the
switch box.
2 Connect the transmission wiring as follows:
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
b
X2M
X2M
X2M X1M (A1P)
RKXYQ5 RDXYQ5
TO OUT/D TO IN/D
F1 F2 F1 F2
a1 a2 a2
a
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
b
a
RKXYQ8 RDXYQ8
TO OUT/D TO IN/D
F1 F2 F1 F2
8 HP 5 HP
a Sh shielded cable (2 wires) (no polarity)
a1, a2 Connection of shield to earth
b Terminal board (field supply)
WARNING
Shielded cable. Using shielded cable for the transmission
wiring is mandatory for 5 HP, and optional for 8 HP.
X2M
F1F2
F1F2
a1
X1M
X1M (A1P)
5 HP 8 HP
X2M
a2
F1
F2
X2M
a2
F1
F2
RKXYQ5 RDXYQ5 RKXYQ8 RDXYQ8
a1, a2 Earth (use the screw delivered as accessory)
When using shielded cable:
▪ In case of 5 HP ( a1 and a2 ): Connect the shield to the
earth of the compressor unit and the heat exchanger
unit.
▪ In case of 8 HP (only a2 ): Connect the shield only to
the earth of the heat exchanger unit.