Fujitsu AJYA36LALH Installation Manual page 11

6. 4. 1. Transmission wiring specifi cations
Follow the specifi cations below for the transmission cable.
Use Size
2
Transmission cable 0.33mm non-polar 2core, twisted pair
6. 4. 2. Wiring rules
(1)Total length of transmission cable
Total transmission line length: MAX 3600m
EF+EG+GH+HJ+HK+KL < 3600m (Fig.2)
In the following cases , Signal Amplifi er is required.
When the total length of the transmission line exceeded 500m.
AB+BC+BD > 500m (Fig.1)
When the total number of units* is over 64.
Transmission line length between each unit*
(2)Length of transmission cable between 1 network segment (NS)
EF+EG+GH+HJ+HK 500m (Fig.2)
KL 400m (Fig.2)
Unit* means indoor unit, outdoor unit, Touch Panel Controller and System Controller,
Signal Amplifi er, single split adaptor, Network Convertor etc..
Fig. 1
Outdoor unit
B
A
Terminal
resistor
Indoor unit
When AB+BC+BD>500m
:Signal Amplifi er is required.
Fig. 2
NS 1
Outdoor unit
Indoor unit
F
Terminal resistor
Transmission line
G
H
J
K
NS 2
Signal Amplifi er
L
Terminal resistor
Cable type Remarks
22AWG LEVEL 4 (NEMA)
LONWORKS ®
compatible cable
solid core diameter 0.65mm
400m
Transmission line
System
Controller
C
D
Touch
Panel
Controller
NOTE) Do not use loop wiring.
This may lead to parts
damage and erroneous
operation.
Touch
Panel
Controller
System
Controller
6. 4. 3. Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal
amplifi er.
To enable automatic address setting for the indoor unit, connect the indoor unit to out-
door units under the same refrigerant system.(Fig.4)
Example: Disable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Example: Enable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
En-10