Relocation; Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin FXSN71A2VEB Installation And Operation Manual

a
b
a Drain plug
b Phillips 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 (c).
▪ Connect the power supply (a).
▪ Connect the user interface (b).
▪ Reattach the service cover.
a
a Power supply terminal block
b User interface terminal block
c Service cover with wiring diagram
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.
e f a
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.
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602815-1F – 2021.07
b
c
c d b
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
completed" [ 4 17]).
is not yet
11.3

Relocation

Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
12

Piping installation

12.1

Preparing refrigerant piping

12.1.1

Refrigerant piping requirements

NOTICE
Refrigerant R744 requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant and oil. Use K65 copper-iron alloy
tube system for high-pressure applications with a working
pressure of 120 bar at the air conditioner side and 90 bar
at the refrigeration side.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
NOTICE
If the ability to close the stop valves for field piping is
wanted, the installer MUST install a pressure relief valve
on the following piping:
▪ Outdoor unit to refrigeration indoor units: on liquid
piping
▪ Outdoor unit to air conditioning indoor units: on liquid
piping AND gas piping
Refrigerant piping diameter
Liquid piping
Ø9.5 mm
Refrigerant piping material
▪ Piping material: K65 copper-iron alloy (CuFe2P), maximum
operating pressure = 120 bar
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
9.5 mm (3/8") R420
12.7 mm (1/2")
(drawn)
12 Piping installation
"When installation of the system
Gas piping
Ø12.7 mm
(a)
Thickness (t)
Ø
≥0.65 mm
t
≥0.85 mm
Installation and operation manual
17