12 Unit installation
Installation and operation manual
15
FXFA20~125A2VEB
VRV system air conditioner
3P599604-1C – 2020.10
a
c
b
d
a
Centre of the unit
b
Centre of the ceiling opening
c
Paper pattern for installation (upper part of the packing)
d
Screws (accessories)
▪
Ceiling opening and unit
:
▪ Make sure the ceiling opening is within the following limits:
Minimum
: 860 mm to be able to fit the unit.
Maximum
: 910 mm to ensure enough overlap between the
decoration panel and the suspended ceiling. If the ceiling
opening is larger, add extra ceiling material.
▪ Make sure the unit and its hanger brackets (suspension) are
centered within the ceiling opening.
(mm)
710
840
860~910
950
c
d
e
f
780
840
860~910
950
c
d e
f
a
b
a
Drain piping
b
Refrigerant piping
c
Hanger bracket pitch (suspension)
d
Unit
e
Ceiling opening
f
Decoration panel
Example
If A
(a)
Then
B
(a)
C
(a)
A
C
B
860 mm
10 mm
45 mm
910 mm
35 mm
20 mm
(a)
A:
Ceiling opening
B:
Distance between the unit and the ceiling opening
C:
Overlap between the decoration panel and the suspended
ceiling
▪
Installation guide
. Use the installation guide to determine the
correct vertical position.
2
1
2
1
2
1
2
1
A
B
1
1
2
C
a b c
2
1
2
D
A
In case of installation with standard decoration panel
B
In case of installation with fresh air intake kit
C
In case of installation with self-cleaning decoration panel
D
In case of installation with design decoration panel
a
Suspended ceiling
b
Installation guide (accessory)
c
Unit
▪
Level
. Make sure the unit is level at all 4 corners using a level or a
water-filled vinyl tube.
c
b
b
a
a
Level
b
Vinyl tube
c
Water level
NOTICE
Do NOT install the unit tilted.
Possible consequence:
If
the unit is tilted against the direction of the condensate flow
(the drain piping side is raised), the float switch might
malfunction and cause water to drip.
12.2.2
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 25 mm nominal diameter and
32 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
