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13 Piping installation
Installation and operation manual
18
FXAA15~63AUV1B
VRV system air conditioner
3P622285-1B – 2020.10
▪
Rigid polyvinyl chloride pipe.
When connecting a rigid polyvinyl
chloride pipe (nominal Ø13 mm) directly to the drain hose as with
embedded piping work, use a field supplied drain socket (nominal
Ø13 mm).
a
b
c
a
Drain hose supplied with the indoor unit
b
Drain socket with nominal Ø13 mm (field supply)
c
Rigid polyvinyl chloride pipe (field supply)
▪
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.
≥50
mm
▪
Condensation.
Take measures against condensation. Insulate
the complete drain piping in the building.
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
B
C
a 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.
4
Attach the drain hose to the refrigerant piping bottom side using
adhesive vinyl tape.
A
B
C
b
a
A
Left-side piping
B
Left-back piping
C
Left-bottom piping
a
Remove the pipe port cover here for left-side piping
b
Remove the pipe port cover here for left-bottom piping
To check for water leaks
1
Remove the air filters (see
"7.2.3 To clean the air filter"
11]).
2
Gradually pour approximately 1 l of water in the drain pan, and
check for water leaks.
a
b
a
Drain pan
b
Plastic container
3
Reattach the air filters (see
"7.2.3 To clean the air filter"
11]).
13
Piping installation
13.1
Preparing refrigerant piping
13.1.1
Refrigerant piping requirements
CAUTION
Piping MUST be installed according to instructions given in
18]. Only mechanical joints (e.g.
braze+flare connections) that are compliant with the latest
version of ISO14903 can be used.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping diameter
For piping connections of the indoor unit use the following piping
diameters: