Bosch CLIMATE 5000 VRF RDCI Series Installation Manual page 20

20 | ELECTRIC WIRING
8.6 Electric wiring of indoor/outdoor units
CAUTION
Install a separate power supply for indoor unit and outdoor unit.
■
An all-pole disconnection device which has at least 3 mm separation
■
distance in all poles and a residual current device (RCD) shall be
incorporated into the fixed wiring in accordance with national wiring
regulations.
All indoor units must be connected to the same electrical power
■
supply incorporating a leak protector and must be able to be isolated
off one switch. Each indoor unit must also have an electrical
isolation as per the national wiring regulations.
3 Core shielded cable must be used for communication wires.
■
8-6-1 Outdoor unit power wiring
With power facilities
■
Outdoor unit
Leakage
power supply
protector
380-415V 3N~ 50Hz
Leakage
protector
Manual
switch
Branch box
Power facilities 1
(with leakage protector)
Leakage
protector
Manual
switch
Branch box
Power facilities 12
(with leakage protector)
6 720 862 437 (2016/10)
Manual
switch
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
Fig. 8-4
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Fig. 8-5
Indoor power supply
■
Indoor power
Leakage protector
Manual switch
1 2 3
9 10 11
CAUTION
Ensure the correct communication wires are with the correct
■
system.
Electrical power supply and communication cables must be installed
■
in separate containment. (Current capacity of power supply: less
than 10A--300mm, less than 50A--500mm.)
When connecting multiple outdoor units, ensure the address
■
settings have been done prior to powering on.
8.7 Signal wire of indoor/outdoor units
Communication wiring must be 3 core shielded cables and must be
■
> 0.75mm in size. Communication cables are polarity sensitive.
Outdoor unit Outdoor unit Outdoor unit
(master unit) (slave unit) (slave unit)
(P Q E)
(H1 H2 E) (H1 H2 E)
Signal wire between outdoor units
(P Q E)
SBOX
Signal wire for indoor/
outdoor units
P
(open)
Q
P
(open) group control
Q
The indoor unit where the communication wire ends (last leg), should have a
resister (suppled) fitted between port P and port Q
8.8 Example for power wire connection
Power(380-415V 3N~ 50Hz)
L1 L2 L3 N
L1 L2 L3 N
Outdoor unit (master unit)
L1 L2 L3 N H1 H2 E P Q E
SBOX
Signal wire between indoor/outdoor units
P Q E
Indoor unit
L N P Q E L N P Q E A B C D E
Branch Box Branch Box
Power wire between indoor units
A B C D E
Wire controller
Branch box Indoor unit
4 5 6 7 8
12 13 14
15 16
Fig. 8-6
Outdoor unit
(slave unit)
Shielded layers must terminate to
ground.
(H1 H2 E)
(H1 H2 E)
P
(open)
Q
SBOX SBOX SBOX
P
(open)
Q
P
(open)
Q
Fig. 8-7
Outdoor unit (slave unit) Outdoor unit (slave unit)
L1 L2 L3 N H1 H2 E P Q E L1 L2 L3 N H1 H2 E
Signal wire between outdoor units
Indoor unit Indoor unit
L N P Q E A B C D E L N P Q E A
Branch Box Branch Box
Signal wire between indoor unit and wire controller
A B C D E A
Wire controller Wire controller
Fig. 8-8
RDCI Series – All DC Inverter Outdoor Units
P Q E
B C D E
B C D E