Installation and operation manual
9
FXLQ20~6 FXNQ20~63P2VEB
VRV System air conditioners
4P323720-1 – 2012.06
Wiring examples
Fit the power supply wiring of each unit with a switch and fuse as
shown in
figure 1
.
Complete system example (3 systems)
When using 1 remote controller for 1 indoor unit. (Normal operation)
(See figure 2)
For group control or use with 2 remote controllers
(See figure 4)
When including BS unit
(See figure 3)
PRECAUTIONS
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.
For a group control remote controller, choose the remote
controller that suits the indoor unit which has the most functions.
Do not ground the equipment on gas pipes, water pipes,
lightning rods or crossground with telephones. Improper
grounding could result in electric shock.
Field setting
Field setting must be made on the remote controller in function of the
installation condition.
Setting can be made by changing the "Mode number", "First
code No." and "Second code No.".
For setting and operation, refer to the "Field settings" in the
installation manual of the remote controller.
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". Refer to the installatoin manual of the remote
controller.
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 board (remote controller to transmission wiring).
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 operation
- Turn the power on and then use the remote controller to
select operation.
- Set the remote controller to the field set mode. For details,
refer to the chapter "How to set in the field", in the remote
controller manual.
- When in the field set mode, select mode No. 12, then set the
first code No. to "1". Then set second code (position) No. to
"01" for forced off and to "02" for on/off operation. (forced off
at factory set.)
Centralized control
For centralized control, it is necessary to designate the group No. For
details, refer to the manual of each optional controller for centralized
control.
1
Power supply
6
BS unit (only for heat
recovery system)
2
Main switch
3
Outdoor unit
7
Power supply wiring
4
Indoor unit
8
Transmission wiring
5
Remote controller
9
Switch
10
Fuse
1
Outdoor unit
2
Indoor unit
3
Remote controller (optional accessories)
4
Most downstream indoor unit
5
For use with 2 remote controllers
6
BS unit
Wire specification
Sheathed vinyl cord or cable (2 wire)
Gauge
0.75-1.25 mm
2
Length
Maximum 100 m
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
input off
on: turns on the unit
(impossible by remote controllers)
Input "off" enables control
input on
off: turns off the unit by
remote controller
F2
T1
T2
FORCED
OFF
Input A
