Step 6A: To Automatically Charge Refrigerant - Daikin RYYQ8T7Y1B Installer And User Reference Manual

p < p >
h
A B
g
f
a
d
D
N2 R410A
C
b c e
a Pressure reducing valve
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
h Equalising line stop valve (only for RYMQ)
A Valve A
B Valve B
C Valve C
D Valve D
4 Do one of the following:
If
4a The calculated additional
refrigerant amount is reached
by above pre-charging
procedure
4b The total amount of
refrigerant could not be
charged by pre-charging
INFORMATION
If the total additional refrigerant amount was reached in
step 4 (by pre-charging only), record the amount of
refrigerant that was added on the additional refrigerant
charge label provided with the unit and attach it on the
back side of the front panel.
Additionally, input the additional refrigerant amount into the
system via setting [2-14].
Perform the test
"8 Commissioning" on page 48.
Charging refrigerant
5 After pre-charging, connect valve A to the refrigerant charge
port and charge the remaining additional refrigerant through this
port. Open all outdoor unit stop valves. At this point, valve A
must remain closed!
p < p >
A
d
b
R410A
a c
a Weighing scales
b Refrigerant R410A tank (siphon system)
c Vacuum pump
d Refrigerant charge port
A Valve A
INFORMATION
For a multi outdoor unit system, it is not required to
connect all charge ports to a refrigerant tank.
The refrigerant will be charged with ±22 kg in 1 hour time
at an outdoor temperature of 30°C DB or with ±6 kg at an
outdoor temperature of 0°C DB.
If you need to speed up in case of a multiple outdoor
system, connect the refrigerant tanks to each outdoor unit.
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV system air conditioner
4P370475-1C – 2016.11
Then
Close valves D and B and
disconnect the manifold
connection to the liquid line.
Close valves D and B,
disconnect the manifold
connection to the liquid line,
and perform steps 5~6.
procedure as described
NOTICE
▪ The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already
factory charged with refrigerant, so be careful when
connecting the charge hose.
▪ After adding the refrigerant, do not forget to close the
lid of the refrigerant charging port. The tightening
torque for the lid is 11.5 to 13.9 N•m.
▪ In order to ensure uniform refrigerant distribution, it
may take the compressor ±10 minutes to start up after
the unit has started operation. This is not a malfunction.
6 Proceed with one of the following:
6a "6.7.6 Step 6a: To automatically charge refrigerant" on
page 33
6b "6.7.7 Step 6b: To manually charge refrigerant" on page 34
INFORMATION
After charging refrigerant:
▪ Record the additional refrigerant amount on the
refrigerant label provided with the unit and attach it to
the backside of the front panel.
▪ Input the additional refrigerant amount into the system
via setting [2‑14].
▪ Perform
"8 Commissioning" on
6.7.6 Step 6a: To automatically charge
refrigerant
INFORMATION
The automatic refrigerant charging has limits as described
below. Out of these limits, the system cannot operate the
automatic refrigerant charging:
▪ Outdoor temperature: 0~43°C DB.
in
▪ Indoor temperature: 10~32°C DB.
▪ Total indoor unit capacity: ≥80%.
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the automatic refrigerant
charge operation mode.
Depending on the ambient limitation conditions (see above), the unit
will automatically decide which operation mode will be used to fulfill
the automatic refrigerant charge: cooling or heating. If above
conditions are fulfilled, cooling operation will be selected. If not,
heating.
Procedure
1 Idle (default) screen is shown.
2 Push BS2 once.
Result: Indication "
3 Push BS2 for more than 5 seconds, wait while the unit is
preparing for operation. 7‑segment display indication: "
" (pressure control is executed):
If
Heating operation is
started
Cooling operation is
started
6 Installation
the test procedure described
page 48.
".
Then
Indication " " till " " will be
displayed (start up control; waiting
stable heating operation).
Indication " " till " " will be
displayed (start up control; waiting
stable cooling operation).
Installer and user reference guide
in
33