Johnson Controls VRF System Engineering Manual page 42

OPTIONAL PARTS
[ Electrical Wiring Connecting and Setting ]
Connection between Indoor Units
1
Perform the connection work as shown below.
Power Supply Cable 208/230V
Power Supply Cable
(208/230V)
Communication Cable
(No Polarity)
Do not run the connected wireless controller cable and the power supply cable (208/230V) in parallel in
2
the indoor units.
Stabilize the cable with plastic bands. Along with the wiring outside the indoor units, the communication
cables should not run with the power supply cable (208/230V). Keep a separation of more than 12
inches, or run the cable through a grounded metal conduit.
Unit Number Setting
3
The indoor unit numbers are set by the auto-address function. Therefore, an indoor unit number setting
is not required. If the indoor unit number is fixed, set the unit number of all indoor units respectively and
sequentially. It is recommended that the unit number settings begin with "1". The setting is set not to
overlap the unit number.
Unit Number Setting
DSW6 (Tens Digit)
1 2 3 4 5 6
Factory setting for DSW6 and RSW1 were set to "0".
Max. 63 units are available for setting.
3-14
Indoor Unit No.1
TB TB
1 2
R S
– A B 1 2
L N
1
Connecting Cable
(Accessory)
IR Receiver Kit
Use the field-supplied communication cable (AWG18)
for the wired controller cable. The total length
should be within 1640ft (500m). If the total length
is less than 98ft (30m), AWG22 cables can be used.
RSW1 (Units Digit)
Setting Set by inserting
Position slotted screwdriver
ON
into the groove.
OFF
Indoor Unit No.2 Indoor Unit No.3
TB TB TB
1 2 1
R S R S
– A B 1 2 –
L N L N
1 1
Wired Controller Cable
Ex.: Set for No. 16 Unit
DSW6 RSW1
ON
OFF
1 2 3 4 5 6
Set at "6".
Set No.1 pin ON.
TB
2
A B 1 2
TC-16002-rev.1