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13 Piping installation
Installation and operation manual
18
EKVDX32~100A2VEB
VRV system air conditioner
4P555815-1A – 2021.08
≥100
≤625
(mm)
a
a
T-joint
12.2.4
To connect the drain piping to the indoor
unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
1
Push the drain hose as far as possible over the drain pipe
connection.
1
a
b
a
Drain pipe connection (attached to the unit)
b
Drain hose (accessory)
2
Install the metal clamp.
3
Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
4
Gradually put approximately 1 l of water in the drain pan, and
check for water leaks.
≤4 mm
ba
c
2
3
4
c
a
Drain pipe connection (attached to the unit)
b
Drain hose (accessory)
c
Metal clamp (accessory)
5
Wind the self-adhesive sealing pad (accessory) around the
metal clamp and drain hose.
5
5
d
d
Sealing pad (accessory)
6
Connect the drain piping to the drain hose.
6
e
e
Drain piping (field supply)
NOTICE
▪ Do NOT remove the drain pipe plug. Water might leak
out.
▪ Use the drain outlet only to discharge the water before
maintenance.
▪ Insert and remove the drain plug gently. Excessive
force may deform the drain socket of the drain pan.
Pull out the plug.
▪ Do NOT wiggle the plug up and down.
a
Push in the plug.
▪ Set the plug and push it in using a Phillips screwdriver.
a
b
a
Drain plug
b
Philips screwdriver
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.