Fujitsu Airstage J-II Series Design & Technical Manual page 534

3-8. SIGNAL AMPLIFIER
„ MODEL: UTY-VSGXZ1
„
If the total length of transmission line exceeds 1,640ft. (500m), or the number of units exceeds 64
units, A signal amplifier will be required.
● Transmission line length can be extended up to 11,811 ft. (3,600m) with multiple signal amplifier.
● Up to 8 Signal Amplifier(Filter mode is OFF) can be installed in 1 VRF network system.
● Up to 32 Signal Amplifier(Filter mode is ON) can be installed in 1 VRF network system.
● When indoor unit is installed 321 or more, install one Signal amplifier (Filter mode is ON) for every 64
units. (However, only when VR-II Series is installed.)
To prevent the drop of signal level by taking distance of length or quantity of unit in VRF
network with installing signal amplifier, signal level can be recovered.
„ ELECTRICAL WIRING
„
z Except in the case of V and S Series (Indoor unit is installed 320 units or less)
„
1Ø50 Hz
220-240 V
SWITCH
INDOOR UNIT
TRANS-
MISSION
TERMINAL
RESISTOR*
(DIP SW setting)
X1 X2
IN/U-
OUT/U
FUSE (3 A)
POWER
SUPPLY
L N
X1 X2
Z1 Z2 H1 H2
OTHER MULTI
CYCLE OUT/U
OUTDOOR UNIT
(MASTER UNIT)
- (05 - 171) -
Network
Network
Segment B
Segment A
SIGNAL AMPLIFIER
NO HIGH VOLTAGE
TRANSMISSION
CH A CH B
X1 X2 X1 X2
TERMINAL
RESISTOR*
TO SLAVE
UNIT
INDOOR UNIT
TRANS-
MISSION
X1 X2
Transmission Line