Daikin FFQ09Q2VJU Manuel D'installation page 13

Use a round crimp-style terminal for connection to the terminal block for power supply. If it cannot be used due to
unavoidable reasons, be sure to observe the following instructions:
forces are not applied to the terminals.
Use copper wire only.
For electric wiring work, refer also to
For remote controller wiring details, refer to the installation manual attached to the remote controller.
A circuit breaker capable of shutting down power supply to the entire system must be installed.
The remote controller wiring should be procured locally.
Table 3
Wiring between units
Remote controller wiring
Wiring to ground terminal
* This will be the total extended length in the system when doing group control.
CAUTION
Arrange the wires and fix a cover firmly so that the cover does not float during wiring work.
Do not clamp remote controller wiring together with wiring between units. Doing so may cause malfunction.
Not following this guideline may result in malfunction due to electrical noise.
English
Wiring
Attach insulation sleeve
Round crimp-style terminal
Wire
Wire size and length must comply with
local codes.
Sheathed (2 wire)
Wire size and length must comply with
local codes.
attached to the electrical wiring box cover.
Size
–
AWG 18 - 16
–
Length (ft.)
–
Max.1640*
–
12