Bosch MDCI8-1 Installation Manual page 11

NOTE
The air conditioning units can be connected to a Central Control
Monitor (CCM). Before operation, ensure the wiring is completed and
all internal and external units are addressed.
5.2 Indoor Unit Wiring
Power Supply
■
Table 5-2
Capacity(KW)
Phase
Indoor
Voltage and Frequency
Unit
Power
Power Wiring Size
Circuit Breaker (A)
Indoor Unit/Outdoor Unit
Signal Wire (mm )
2
Single phase indoor unit
L N X Y E
Y/G
XT1
Power Supply
To Central Control
Monitor (CCM)
COMM. BUS
Please use 3-core shielded wire, and
connect the shielded layer to Grounding
1 Communication wires are polarity sensitive. Three core shielded
cable must be used to prevent interference. Shielded layers must be
connected to ground.
2 The control between units is a BUS type. Units addresses must be set
during commissioning.
CAUTION
Indoor/Outdoor unit signal wire is a low voltage circuit. Do not
connect signal wires to electrical power voltage terminals.
Mini VRF Heat Pump Outdoor Unit
1.8~16
1-Phase
220-240V~ 50Hz
Wire size must comply with local
standards
16
3-core shielded wire
3X0.75
Display
board
P Q
E
XT3 Wire controller
To Outdoor
To wire controller
COMM.BUS
The reserved wire control
function is indicated in broken
line table, users can purchase
the wire controller when
necessary.
Fig. 5-5
NOTE
The wire diameter and continuous length has been calculated and
cannot have more than a 2% fluctuation in voltage.
Indoor unit power supply wiring
Indoor Power Supply
Circuit Breaker
Manual swtich
CAUTION
1 Ensure the correct wires correspond with the correct pipework
installation.
2 Ensure power cables and signal cables are installed in separate
containment. A minimum distance of 300mm when power capacity
output is less than 10A and a minimum of 500mm for a power
capacity output over 10A.
Indoor/Outdoor unit signal wiring
Outdoor Unit
Indoor/Outdoor
Unit Signal Wire
(open)
In broken line table, users can purchase the wired
controller when necessary.
5.3 Function setting dial switches instructions
• SW3(SW-1) definition: Auto Addressing Dial
ELECTRICAL WIRING | 11
Wire Distribution Box
Indoor Unit
Fig. 5-6
Fig. 5-7
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