Wiring Method; Unit Wiring - Fujitsu AIRSTAGE UTY-VKGX Installation Manual

5.1. Wiring method

PROPER SYSTEM DIAGRAM
General-purpose
KNX device
KNX Network
Outdoor unit
KNX
Convertor
(UTY-VKGX)
Indoor unit
VRF
Outdoor unit
Maximum controllable indoor unit
number per 1 KNX Convertor
Maximum controllable outdoor unit
number per 1 KNX Convertor
Maximum connectable KNX
Convertor number per 1 VRF System
En-3
Lighting facilities
Security system
Automatic fi re
alarm interface
Ventilation system
Indoor unit
VRF network system
Transmission cable
(non-polar
2-conductor)
128
100
9
ELECTRICAL WIRING
General-purpose
INDOOR UNIT
KNX device
TRANSMISSION CABLE
OUTDOOR UNIT
MASTER OR SLAVE
OUTDOOR UNIT
Power supply
cable
Transmission cable
to VRF network
Note :
• Do not bind the power supply cable and transmission cable to avoid an
erroneous operation.
• Use shield cable for transmission cable.
The shield metal should be earthed (grounded).
• Do not forget to earth (ground) this product.
• Install all-pole circuit breaker *1 to the easily accessible location.
*1: circuit breaker with a contact gap of more than 3 mm and breaking
capacity is 16(A).
• Before connecting cables, turn off the power of the VRF units connected
to the convertor.
• The symbol don't mean protective earth.
Don't connect the protective earth line to the symbol.

5.2. Unit wiring

5.2.1. Power supply cable
Keep the ground cable longer than the other cables.
Earth (Ground)
cable
(1) Use ring terminals with insulating sleeves as shown in the fi gure below
to connect to the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate
tool so that the cables do not come loose.
(3) Use the specifi ed cables, connect them securely, and fasten them so
that there is no stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads
may be damaged and prevent the screws from being properly tight-
ened.
(5) Do not tighten the terminal screws too much, otherwise, the screws
may break.
(6) See the table for the terminal screw tightening torques.
(7) Do not fi x 2 or more power supply cables with 1 screw.
1Ø 50/60 Hz
220-240 V
BREAKER
KNX CABLE
(Twisted pair)
TRANSMISSION
This product
KNX cable
Power supply cable
EARTH
POWER
SUPPLY
CABLE