9
3. When including BS unit
NOTE
1. A single switch can be used to supply power to units on the
same system. However, branch switches and branch circuit
breakers must be selected carefully.
2. Do not ground the equipment on gas pipes, water pipes,
lightning rods or telephone ground wires. Improper ground-
ing could result in electric shock.
9-3
CONTROL BY 2 REMOTE CONTROLLERS
(Controlling 1 indoor unit by 2 remote
controllers)
• When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
MAIN/SUB CHANGEOVER
(1) Insert a screwdriver into the recess between the upper
and lower part of remote controller, and working from the 2
positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller.
(2) Turn the MAIN/SUB changeover switch on one of the two
remote controllers PC board to “S”. (Leave the switch of the
other remote controller set to “M”.)
Wiring Method
(See ‘‘8. ELECTRIC WIRING WORK’’)
(3)
Remove the electric parts box lid
(4) Add remote control 2 (slave) to the terminal block for
remote controller (P
1
, P
2
) in the electric parts box.
(There is no polarity.)
(Refer to Fig. 2 and 8-3.)
9-4
COMPUTERISED CONTROL (FORCED OFF
AND ON/OFF OPERATION)
(1) Wire specifications and how to perform wiring
• Connect input from outside to terminals T1 and T2 of the
terminal block for remote controller.
(2) Actuation
• The following table explains FORCED OFF and ON/OFF
OPERATIONS in response to input A.
(3) How to select FORCED OFF and ON/OFF
• Turn the power on and then use the remote controller to
select operation.
9-5
CENTRALIZED CONTROL
• For centralized control, it is necessary to designate the group
No. For details, refer to the manual of each optional control-
lers for centralized control.
10. FIELD SETTING
Make sure the electric parts box lids are closed on the
indoor and outdoor units.
Field setting must be made from the remote controller in
accordance with the installation condition.
• Setting can be made by changing the “Mode No.”, “FIRST
CODE NO.”, and “SECOND CODE NO.”.
• For setting and operation, refer to the “FIELD SETTING” in
the installation manual of the remote controller.
Wire specification
Sheathed vinyl cord or cable (2 wire)
Gauge
AWG18-16
Length
Max. 328 ft.
External terminal
Contact that can ensure the minimum
applicable load of 15 V DC, 10 mA.
FORCED OFF
ON/OFF operation
Input “ON” stops operation (impossible by
remote controllers).
Input OFF
→
ON
turns ON unit.
Input OFF enables control by remote con-
troller.
Input ON
→
OFF
turns OFF unit.
