19
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 grounding could result in electric shock.
8-3 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 the remote controller.
(Refer to Fig. 28)
(2)
Turn the
MAIN/SUB changeover
switch on one of the
two remote controller PC boards to “S”.
(Leave the switch of the other remote controller set to
“M”.)
(Refer to Fig. 29)
Wiring Method
(See ‘‘7.ELECTRIC WIRING WORK’’)
(3)
Remove the service lid.
(4) Add remote control 2 (slave) to the terminal block
(6P) for remote controller (P
1
, P
2
) in the electric
parts box.
(There is no polarity.) (Refer to Fig. 26 and section
7-3 for the wiring size.)
8-4 COMPUTERISED CONTROL (FORCED OFF AND ON/OFF OPERATION)
(1)
Wire specifications and how to perform wiring
•
Connect the input from outside to terminals T1 and T2 of the terminal block (6P).
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 15V DC, 10 mA.
Upper part of
remote controller
Lower part of
remote controller
Insert the screwdriver here
and gently work off the
upper part of the remote controller.
Fig. 28
S
M
S
S
M
Remote
controller
PC board
(Factory setting)
(Only one remote
controller needs
to be changed if
factory settings
have remained
untouched.)
Fig. 29
Input A
Fig. 30
F2
T1
T2
FORCED
OFF
01_EN_3PN07521-1.fm Page 19 Monday, June 19, 2006 5:05 PM
