Hitachi RAC-35WPC, Technical Catalogue

Page: 37 / 42

OPTION LIST
35
iii) Install the electrical box cover paying attention
not to clamp the cable. Read the installation
manual of each room air-conditioner for
confirming how to connect and how to
assemble the cable of the RAC adaptor.
C CAUTION:
– Disconnect the power plug before performing this work
–
Turn OFF the break power source in case the power is
supplied from the outdoor unit.
x
Connection of Transmission Cable
H-LINK transmission cable connecting to RAC adaptor shall
be connected to H-LINK.
CAUTION:
– DO NOT connect incorrect wiring. It may cause the
failure of the RAC Adaptor. Especially pay attention not
to apply high voltage e.g. AC400/230V.
–
DO NOT perform the wiring work while power to the
central station or the RAC Adaptor is still being
supplied. It may cause malfunction. Turn OFF devices
when performing the wiring work.
– The RAC Adaptor side cable should not overload to the
connector.
– DO NOT clamp the cable when attaching the RAC
adaptor cover.
– Band should not be loose and in fixed position.
10.2.4. DIP SWITCH SETTING
1) Switch OFF the power of room air conditioner before
setting the DIP switch. If the power is ON, the settings
are INVALID.
2) The position of the DIP switch is shown below.
CAUTION:
–
DO NOT turn ON various pins of DSW1 and DSW2
3) Set the refrigerant cycle# by RSW1 and DSW1
DSW1 (Ten digit) RSW1 (Last digit)
DSW1 and RSW1 are set “0” before shipment. Up to 15
cycles can be set.
E.g. Setting in Ref No. 5
4) Set the unit No. by RSW2 and DSW2
DSW2 (Ten digit) RSW2 (Last digit)
DSW2 and RSW3 are set “0” before shipment. Up to 15
cycles can be set.
E.g. Setting in Unit No. 15
5) Slave unit.
In case of setting various RAC adaptors in the same
refrigerant cycle, set the RAC adaptor with smallest
Unit# as a master unit. In case of setting only one RAC
adaptor in a refrigerant system, this adaptor should be
a master unit. Set this procedure by DSW3.
Master Unit setting Setting before shipping
(slave unit setting)
z
: Master Unit setting
{
: Setting before Shipping (Slave Unit setting)
Use enclosed
c
connector
Connector
((Accessory)
RAC Adaptor
H
H-L LINK wiring
To other
c
connection
device of H--LINK
Fixed position
Band
PCB
RSW1 (Refrigerant
c
cycle# setting
RSW1
Unit# setting
DSW1 (Refrigerant
c
cycle# setting)
DSW2 (Unit#
s
setting)
LED
H--LINK
ttransmission
DSW3
Unit# setting
L
LED
DSW4
(Fuse recovery
a
and terminal
resistance
s
setting
ON
OFF
Position
Turn by using
a
a screw driver
ON
OFF
No. 1 pin is OFF
RSW1
The p position is Set 5
ON
OFF
Position
Turn by using a
s
screw driver
ON
OFF
No. 1 pin is OFF
RSW2
The position is Set 5
ON
Ç Ç
ON
Ç Ç