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7.3.4. Work procedure
(1) Remove the control box cover. (4 screws)
(2) Connect the transmission cable to the transmission cable terminal.
(3) Firmly attach the transmission cables using the accessory cable ties.
RU08AH : Up to 9 locations, RU12AH : Up to 13 locations
(4) Attach the conduit connector on the wiring connecting port.
(5) Connect the power supply cable to the power supply cable terminal.
Example) In the case of RU12AH:
M1
Conduit connector
(Power supply cable)
En-11
Transmission cable
(To indoor unit)
M3
Cable tie *1
For branch A
Cable tie *1
For branch B
Cable tie *1
For branch C
Cable tie *1
For branch D
Cable tie *1
For branch I
Cable tie *1
For branch J
Cable tie *1
For branch K
Cable tie *1
For branch L
M2
Transmission cable
[To outdoor unit /indoor
unit (cooling only )]
Cable tie *1
*1) Accessories
Detail M1 : Power supply cable
Ground (Earth)
Wiring connecting
port
Lock nut
Conduit connector
Detail M2 : Transmission cable
Detail M3 : Transmission cable
To indoor unit
(cooling / heating)
(6) Fill the cable holes with putty in order to prevent small animals from entering.
(7) Install the Control box cover. (4 screws)
• Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
RB unit
30 in
(756 mm)
(1,361 mm)
or less
or less
8. FIELD SETTING
Use an insulated screwdriver to set the dip switches.
8.1. PC board layout
• Before turning ON the power supply, set the switches. (The switch settings will be
disabled after the power supply has been turned ON.)
Lock nut
To outdoor unit /
indoor unit
(Cooling only)
Earth (ground)
Supporter
54 in
54 in
54 in
(1,361 mm)
(1,361 mm)
or less
or less
CAUTION
DIP switch SET2
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