5 Preparation
Installer and user reference guide
11
FFA25~60A2VEB(9)
Split system air conditioners
4P550955-4 – 2018.08
▪
Paper pattern for installation
(upper part of packing)
(accessory). When selecting the installation location, use the
paper pattern. It contains the dimensions of the unit and the
required ceiling opening.
▪
Air flow directions
. You can select different air flow directions.
Choose the one best suited for the room. Also make sure the "Air
flow direction" field setting corresponds with the actual situation
(see
"7.1 Field settings" on page 18
).
Example:
a
b
c
a
4-way air flow (all air outlets open)
b
3-way air flow (1 air outlet closed) (optional blocking pad kit
required)
c
2-way air flow (2 air outlets closed) (optional blocking pad
kit required)
▪
Ceiling insulation
. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10 mm
thickness, polyethylene foam).
Do NOT install the unit in the following places:
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
▪
Spacing
. Mind the following requirements:
(mm)
≥1500
≥1500
≥2000
≥4000
≥1500
A
B
C
b
a
d
a
c
A
Minimum distance to the wall
B
Minimum and maximum distance to the floor (see below)
C
≥295 mm
: In case of installation with BYFQ60B
≥300 mm
: In case of installation with BYFQ60C
a
Indoor unit
b
Lighting (the figure shows ceiling-mounted lighting, but
recessed lighting is also allowed)
c
Air fan
d
Static volume (example: table)
▪
Minimum and maximum distance to the floor
:
▪ Minimum: 2.5 m to avoid accidental touching.
▪ Maximum: Depends on the air flow directions and the capacity
class. Also make sure the "Ceiling height" field setting
corresponds with the actual situation. See
"7.1 Field
settings" on page 18
.
5.3
Preparing refrigerant piping
5.3.1
Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Refrigerant piping material
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade
Thickness (t)
(a)
6.4 mm (1/4")
Annealed (O)
≥0.8 mm
t
Ø
9.5 mm (3/8")
12.7 mm (1/2")
(a)
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class
L1 liquid piping
L1 gas piping
25+35
Ø6.4
Ø9.5
50+60
Ø6.4
Ø12.7
5.3.2
Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Ambient
temperature
Humidity
Minimum thickness
≤30°C
75% to 80% RH
15 mm
>30°C
≥80% RH
20 mm
5.4
Preparing electrical wiring
5.4.1
About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Summary of Contents for FFA50A2VEB9
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