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6 Piping installation
a
b
a
Drain hose supplied with the indoor unit
b
Drain socket with nominal Ø13 mm (field supply)
c
Ridgid polyvinyl chloride pipe (field supply)
▪ Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
1 Insert the drain hose in the drain pipe as shown in the following
figure, so it will NOT be pulled out of the drain pipe.
mm
To connect the piping on right side, right-back, or
right-bottom
INFORMATION
The factory default is right-side piping. For left-side piping,
remove the piping from the right side and install it on the
left side.
1 Attach the drain hose with adhesive vinyl tape to the bottom of
the refrigerant pipes.
2 Wrap the drain hose and the refrigerant pipes together using
insulation tape.
A
C
a b
B
A
Right-side piping
B
Right-bottom piping
C
Right-back piping
a
Remove the pipe port cover here for right side piping
b
Remove the pipe port cover here for right-bottom piping
To connect the piping on left side, left-back, or left-
bottom
INFORMATION
The factory default is right-side piping. For left-side piping,
remove the piping from the right side and install it on the
left side.
1 Remove the insulation fixing screw on the right side and
remove the drain hose.
2 Remove the drain plug on the left side and attach it to the right
side.
NOTICE
Do NOT apply lubricating oil (refrigerant oil) to the drain
plug when inserting it. The drain plug may deteriorate and
cause drain leakage from the plug.
3 Insert the drain hose on the left side and do not forget to tighten
it with the fixing screw; otherwise water leakage may occur.
Installation manual
10
c
a
b
b
4 Attach the drain hose to the refrigerant piping bottom side using
adhesive vinyl tape.
A
B
C
b
To check for water leaks
1 Remove the air filters.
2 Gradually pour approximately 1 l of water in the drain pan, and
check for water leaks.
6
Piping installation
6.1
Preparing refrigerant piping
6.1.1
Refrigerant piping requirements
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant piping.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class
20~42
a
a
Insulation fixing screw
Drain hose
a
b
C
Left-side piping
Left-back piping
Left-bottom piping
a
Remove the pipe port cover here for left-side piping
Remove the pipe port cover here for left-bottom piping
L1 liquid piping
Ø6.4
Daikin room air conditioner
b
A
B
L1 gas piping
Ø9.5
ATXF20~42E5V1B
3P650253-11H – 2022.10
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