Daikin RR20AVAK9 Installation & Service Reference page 20

• Insert the flare nuts mounted on the connection parts of both indoor
and outdoor unit into the copper pipes.
• The exact length of pipe protruding from the face of the swaging block
is determined by the flaring tool. See Figure 13C.
• Affix the pipe firmly on the swaging block. Match the centers of both
the flare die and the flaring punch. Tighten the flare punch fully.
Piping Connection to the Units
• Align the center of the piping and sufficiently tighten the flare nut
with your fingers. See Figure 14.
• Tighten the flare nut with a torque wrench until the wrench clicks.
When tightening the flare nut with the torque wrench, make sure you
tighten in the direction of the arrow on the wrench.
• The refrigerant pipe connections are insulated by closed cell polyure-
thane.
Ǿ Tube, D
Inch mm
1/4 6.35
3/8 9.52
1/2 12.70
5/8 15.88
3/4 19.05
Electrical Wire Connection
• All wires must be firmly connected.
• Make sure none of the wires touch the refrigerant pipings, compressor or any moving parts.
• The connecting wire between the indoor unit and the outdoor
unit must be clamped by using provided cord anchor.
• The power supply cord must be equivalent to H07RN-F, which is
the minimum requirement.
• Make sure no external pressure is applied to he terminal con-
nectors and wires.
• To avoid gaps, make sure all covers are properly fixed.
• Use round, crimp-style terminal for connecting wires to the power
supply terminal block. Connect the wires by matching to the
indication on the terminal block. Refer to the wiring diagram
attached to the unit.
• Always use the correct screwdriver to tighten the terminal screws. Unsuitable screwdrivers can damage the screw's head.
A (mm)
Imperial Rigid
(Wing-Nut Type) (Clutch Type)
1.3 0.7
1.6 1.0
1.9 1.3
2.2 1.7
2.5 2.0
Figure 14
Flare Joint
Indoor Piping
Pipe Size
mm (in)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
19.05 (3/4")
Attach insulation sleeve
Round crimp-style terminal
20
Flared Tube
Torque Wrench
Spanar
Torque
Nm / (ft-Ib)
18 (13.3)
42 (31.0)
55 (40.6)
65 (48.0)
78 (57.6)
Electric wire
Figure 15