Transmission Wiring Connection Procedure; Power Wiring Connection Procedure - Daikin RXYN10AY1 Installation Manual

• If small animals might enter the unit, block off any gaps (hatching
parts) with material (field supply).
Knockout hole
(For transmission wiring)
Knockout hole
(For power wiring and
ground wiring)

7-3 Transmission Wiring Connection Procedure

Referring to the following figure connect the transmission wiring.
Do not open the lid of EL. COMPO. BOX 2
(on the left-hand side), which is not touched
Prohibited
during the installation work.
EL. EL. COMPO. BOX 1
COMPO.
Prohibited
A5P A1P
BOX 2
IN/D OUT/D
A B C F1 F2 F1 F2
To outdoor unit of another
A B C
refrigerant system
Connect the line (with polarity-sensitive terminals)
so that the terminal signs coincide.
COOL/HEAT selector
Use two-conductor transmission
wirings (with no polarity).
F1 F2 F1 F2 F1 F2 F1
Outdoor unit side Indoor unit side Outdoor unit side Indoor unit side
BEV unit 1 BEV unit 2
F1 F2 F1 F2
Indoor unit Indoor unit
CAUTION
• Do not connect the power wiring to terminals for the transmission
wiring. Doing so would destroy the entire system.
• Do not coat stranded wires with solder.
• When connecting wires to the terminal block on the PC-board, too
much heat or tightening could damage the PC-board. Attach with
care.
See the table below for the tightening torque of the transmission
wiring terminals.
Screw size
M3 (A5P)
M3.5 (A1P)
• All transmission wiring is to be procured on site. All wiring should
use sheathed vinyl cord 0.75-1.25 mm
only for the COOL/HEAT selector.)
English
Burr
Do not connect power supply
wirings by any means.
F2
Tightening torque (N · m)
0.53 - 0.63
0.80 - 0.96
2
or cable (duplex). (Triplex
• As shown below, secure the transmission cable with the acces-
sory clamp (1) at three points in the EL. COMPO. BOX1.
In the EL. COMPO. BOX1 (A1P)
Use the accessory clamp (1) and fix the
cable to the spacer on the upper right-
hand side of the PCB (A5P).
Use the accessory clamp (1)
to fix to the EL. COMPO. BOX1.
• Outside the units, the transmission wiring must be finished simul-
taneously with the local refrigerant piping, and wound with tape
(field supply).
Liquid pipe
Finishing tape
• Transmission wiring should be done within the following limita-
tions.
If they are exceeded, transmission problems may occur.
Between outdoor unit and indoor unit
Between outdoor unit and outdoor unit of other systems
Max. wiring length
Max. total wiring length
Max. no. of branches
Max. no. of outdoor units of other system that can be
connected
Transmission wiring to COOL/HEAT selector
Max. wiring length
Branch
F1 F2

7-4 Power Wiring Connection Procedure

• Be sure to connect the power supply wiring to the power supply
terminal block and hold it in place using the accessory clamp (1)
as shown in the following figure.
• The ground wiring should be bound to the power wiring using the
accessory clamp (1) to prevent outside force from being applied
to the terminal area.
Gas pipe
Transmission wiring
Insulation material
: 1,000 m
: 2,000 m
: 16
[Note]
No branch is allowed
after branch
: 10
: 500 m
Subbranching
F1 F2 F1 F2
F1 F2 F1 F2
9