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5 Installation
Installation manual
8
FNA25~60A2VEB(9)
Split system air conditioners
4P456958-1D – 2018.11
5.1.3
Guidelines when installing the drain
piping
Make sure condensation water can be evacuated properly. This
involves:
▪ General guidelines
▪ Connecting the drain piping to the indoor unit
▪ Checking for water leaks
General guidelines
▪
Pipe length.
Keep drain piping as short as possible.
▪
Pipe size.
Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 20 mm nominal diameter and
26 mm outer diameter).
▪
Slope.
Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
1~1.5 m
a
a
Hanging bar
O
Allowed
X
Not allowed
▪
Condensation.
Take measures against condensation. Insulate
the complete drain piping in the building.
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.
2
Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
3
Check for water leaks (see
"To check for water leaks" on
page 8
).
4
Install the insulation piece (drain pipe).
5
Wind the large sealing pad (= insulation) around the metal
clamp and drain hose, and fix it with cable ties.
6
Connect the drain piping to the drain hose.
≤4 mm
A
A'
A-A'
A
A'
f
6
5
2
c
e
4
b
a
d
b
a
d
c
3
1
2~6
1
a
Drain pipe connection (attached to the unit)
b
Drain hose (accessory)
c
Metal clamp (accessory)
d
Large sealing pad (accessory)
e
Insulation piece (drain pipe) (accessory)
f
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 if the
drain pump is not used or 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
Phillips screwdriver
To check for water leaks
Gradually pour approximately 1 l of water in the drain pan, and
check for water leaks.
b
a
a
d
c
e
b
c
a
Air outlet
b
Portable pump
c
Bucket
d
Refrigerant pipes
e
Drain outlet
5.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.2.1
To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerating piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.