Daikin Sky Air Advance RZA200D7Y1B, Руководство по установке

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4 Installation
Installation manual
9
250D7Y1B
Sky Air Advance-series
4P573384-1 – 2019.04
4.2.2 To determine if oil traps are required
If oil flows back into the outdoor unit's compressor, this might cause
liquid compression or deterioration of oil return. Oil traps in the rising
gas piping can prevent this.
If Then
The indoor unit is installed
higher than the outdoor
unit Install an oil trap every 10 m (height
difference).
a
b
10 m
a Rising gas piping with oil trap
b Liquid piping
The outdoor unit is
installed higher than the
indoor unit Oil traps are NOT required.
4.3 Checking the refrigerant piping
4.3.1 Checking refrigerant piping: Setup
a
c
f
c
f
b d e h
g
i
a
b
A
B
d e
R32
R32
A Setup in case of pair
B Setup in case of twin
a Pressure gauge
b Nitrogen
c Refrigerant
d Weighing scale
e Vacuum pump
f Stop valve
g Main piping
h Refrigerant branch kit
i Branch piping
4.3.2 To check for leaks: Pressure leak test
1 Test for leaks by applying a bubble test solution to all piping
connections.
2 Discharge all nitrogen gas.
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
4.3.3 To perform vacuum drying
To remove all moisture from the system, proceed as follows:
1 Check that, with the vacuum pump turned off, the target
vacuum is maintained for at least 1 hour.
4.4 Charging refrigerant
4.4.1 About charging refrigerant
The outdoor unit is factory charged with refrigerant, but in some
cases the following might be necessary:
What When
Charging additional refrigerant When the total liquid piping
length is more than specified
(see later).
Completely recharging refrigerant Example:
▪ When relocating the system.
▪ After a leak.
Charging additional refrigerant
Before charging additional refrigerant, make sure the outdoor unit's
external refrigerant piping is checked (leak test, vacuum drying).
INFORMATION
Depending on the units and/or the installation conditions, it
might be necessary to connect electrical wiring before you
can charge refrigerant.
Typical workflow – Charging additional refrigerant typically consists
of the following stages:
1 Determining if and how much you have to charge additionally.
2 If necessary, charging additional refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is
done:
1 All refrigerant is recovered from the system.
2 The outdoor unit's external refrigerant piping is checked (leak
test, vacuum drying).
3 Vacuum drying on the outdoor unit's internal refrigerant piping is
performed.
NOTICE
Before completely recharging, perform vacuum drying on
the outdoor unit's
internal refrigerant piping as well.