5
|
Preparation
Installer reference guide
22
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
a
a
1750
A
B
A
Wall-mounted type
B
Floor-standing type
a
Minimum clearance
Top view:
≥300
≥300
≥1000
(mm)
≤
20
a
a
Indoor unit
▪
Install the unit with a prebuilt fully enclosed casing with removable access panel,
suction air grille and discharge grille. These removable parts shall prevent access
to the unit and can ONLY be removed using a removal tool.
▪
In case of installation under a window sill, make sure that there is no short-circuit
of air.
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
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
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
