Daikin FXDA10A2VEB, Installation And Operation Manual

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13 Piping installation
Installation and operation manual
16
FXDA10~63A2VEB
VRV system air conditioner
3P599562-1 – 2020.05
a
b
a Drain plug
b Philips screwdriver
To check for water leaks
The procedure differs depending on whether installation of the
system is already completed. When installation of the system is not
yet completed, temporarily connect the user interface and power
supply to the unit.
When installation of the system is not yet completed
1 Temporarily connect electrical wiring.
▪ Remove the service cover.
▪ Connect the power supply (a).
▪ Connect the user interface (b).
▪ Reattach the service cover.
L
N
a b
a Power supply terminal block
b User interface terminal block
2 Turn ON the power supply.
3 Start fan only operation (see the reference guide or the service
manual of the user interface).
4 Remove the water inlet cover (1 screw).
5 Gradually pour approximately 1 l of water through the water
inlet, and check for leaks.
b d f e a c
a Water inlet
b Portable pump
c Water inlet cover
d Bucket (adding water through water inlet)
e Drain outlet for maintenance
f Refrigerant pipes
6 Turn OFF the power.
7 Disconnect the electrical wiring.
▪ Remove the service cover.
▪ Disconnect the power supply.
▪ Disconnect the user interface.
▪ Reattach the service cover.
When installation of the system is already completed
1 Start cooling operation (see the reference guide or the service
manual of the user interface).
2 Gradually pour approximately 1 l of water through the water
inlet, and check for leaks (see
"When installation of the system
is not yet completed" [
4
16]).
13 Piping installation
13.1 Preparing refrigerant piping
13.1.1 Refrigerant piping requirements
CAUTION
Piping MUST be installed according to instructions given in
"13 Piping installation" [
4
16]. Only mechanical joints (e.g.
braze+flare connections) that are compliant with the latest
version of ISO14903 can be used.
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
For piping connections of the indoor unit use the following piping
diameters:
Class Pipe outer diameter (mm)
Liquid piping Gas piping
10~32 Ø6.4 mm Ø9.5 mm
40~63 Ø6.4 mm Ø12.7 mm
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