To Determine If Oil Traps Are Required; Checking The Refrigerant Piping; Checking Refrigerant Piping: Setup; To Check For Leaks - Daikin AZQS100B8V1B Manual De Instalación

NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
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
The indoor unit is installed Install an oil trap every 10 m (height
higher than the outdoor difference).
unit
a Rising gas piping with oil trap
b Liquid piping
The outdoor unit is Oil traps are NOT required.
installed higher than the
indoor unit
4.3

Checking the refrigerant piping

4.3.1

Checking refrigerant piping: Setup

f
a
c
R410A
b d e
a Pressure gauge
b Nitrogen
c Refrigerant
d Weighing machine
e Vacuum pump
f Stop valve
4.3.2

To check for leaks

NOTICE
Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).
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).
AZQS100~140B8V1B + AZQS100~140B7Y1B
Split system air conditioners
4P385528-1C – 2016.10
Then
a
10 m
b
1 Charge the system with nitrogen gas up to a gauge pressure of
at least 200 kPa (2 bar). It is recommended to pressurize to
3000 kPa (30 bar) in order to detect small leaks.
2 Check for leaks by applying the bubble test solution to all
connections.
3 Discharge all nitrogen gas.
4.3.3

To perform vacuum drying

1 Vacuum the system until the pressure on the manifold indicates
−0.1 MPa (−1 bar).
2 Leave as is for 4-5 minutes and check the pressure:
If the pressure...
Does not change
Increases
3 Evacuate for at least 2 hours to a pressure on the manifold of
−0.1 MPa (−1 bar).
4 After turning OFF the pump, check the pressure for at least
1 hour.
5 If you do NOT reach the target vacuum or cannot maintain the
vacuum for 1 hour, do the following:
▪ Check for leaks again.
▪ Perform vacuum drying again.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
4.4

Charging refrigerant

4.4.1 To determine the additional refrigerant
amount
To determine if adding additional refrigerant is necessary
If
L1≤30 m (chargeless length)
L1>30 m
INFORMATION
Piping length is the one way length of liquid piping.
To determine the additional refrigerant amount (R in kg)
30~40 m
R: 0.5 kg
INFORMATION
For details about the combination of your outdoor and
indoor unit, see the engineering databook.
4 Installation
Then...
There is no moisture in the
system. This procedure is
finished.
There is moisture in the
system. Go to the next step.
Then
You do not have to add
additional refrigerant.
You must add additional
refrigerant.
For future servicing, encircle the
selected amount in the tables
below.
L1 (m)
40~50 m
1.0 kg
Installation manual
7