14 Electrical installation
Installation and operation manual
19
FXAA15~63AUV1B
VRV system air conditioner
3P622285-1B – 2020.10
Class
Pipe outer diameter (mm)
Liquid pipe
Gas pipe
15~32
Ø6.4
Ø9.5
40~63
Ø12.7
Refrigerant piping material
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Flare connections:
Only use annealed material.
▪
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 maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
13.1.2
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
Pipe outer diameter
(Ø
p
)
Insulation inner
diameter (Ø
i
)
Insulation thickness
(t)
6.4 mm (1/4")
8~10 mm
≥10 mm
9.5 mm (3/8")
12~15 mm
≥13 mm
12.7 mm (1/2")
14~16 mm
≥13 mm
Ø
i
Ø
i
t
Ø
p
Ø
p
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
13.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING/SCALDING
13.2.1
To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerant 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.
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
▪
Pipe length
. Keep refrigerant piping as short as possible.
1
Flare connections
. Connect refrigerant piping to the unit using
flare connections.
2
Insulation
. Insulate the refrigerant piping, the insulating tape
should be wrapped from the L-shaped bend all the way to the
end inside the unit as follows:
d
f
b
e
g
a
c
h
d
b
i
a
Field piping
b
Indoor unit piping insulation tubing
c
Indoor unit piping
d
Insulating tubing tape
e
Insulating tape (accessory)
f
Large tie wrap (accessory)
g
Beginning of wrapping
h
L-shaped bend
i
Insulation tubing seam (make sure there are no gaps in
the insulation tubing seam)
NOTICE
Make sure to insulate all refrigerant piping. Any exposed
piping might cause condensation.
14
Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provide full
disconnection under overvoltage category III.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
14.1
Specifications of standard wiring
components
Component
Class
15+20
25~40
50
63
Power
supply
cable
MCA
(a)
0.3 A
0.4 A
0.5 A
0.6 A
Voltage
220~240 V
Phase
1~
Frequency
50 Hz
Wire sizes
1.5 mm
2
(3‑core wire)
H07RN-F (60245 IEC 66)
Transmission wiring
0.75 to 1.25 mm² (2‑core wire)
H05RN-F (60245 IEC 57)
User interface cable
