Wiring Examples; Field Setting - Daikin FXLQ20P2VEB Installation And Operation Manual

Wiring examples

Fit the power supply wiring of each unit with a switch and fuse as
shown in figure 1.
1 Power supply
2 Main switch
3 Outdoor unit
4 Indoor unit
5 Remote controller
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
When including BS unit (See figure 3)
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
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.
Installation and operation manual
9
6 BS unit (only for heat
recovery system)
7 Power supply wiring
8 Transmission wiring
9 Switch
10 Fuse
(See figure 4)

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).
Wire specification
Gauge
Length
External terminal
F2 T1 T2
FORCED
OFF
Input A
2 Actuation
- The following table explains "forced off" and "on/off
operations" in response to input A.
Forced off
Input "on" stops operation
Input "off" enables control
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.
Sheathed vinyl cord or cable (2 wire)
2
0.75-1.25 mm
Maximum 100 m
Contact that can ensure the minimum
applicable load of 15 V DC, 10 mA
on/off operation
input off on: turns on the unit

(impossible by remote controllers)
input on off: turns off the unit by

remote controller
FXLQ20~63P2VEB + FXNQ20~63P2VEB
VRV System air conditioners
4P323720-1 – 2012.06