Daikin VRV IV Q+ Series Installation And Operation Manual page 29

i Liquid line stop valve
j Outdoor unit
k To indoor unit
l Stop valve
m Field piping
n Gas flow
o Stop valve service port
A Valve A
B Valve B
C Valve C
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.
Perform the test
"17 Commissioning" [ 4 37].
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!
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.
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.
14.4.6 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.
▪ Indoor temperature: 10~32°C DB.
▪ Total indoor unit capacity: ≥80%.
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546221-1B – 2020.10
Then
Close valve B and disconnect
the manifold connection to
the liquid line.
Close valve B, disconnect the
manifold connection to the
liquid line, and perform steps
5~6.
procedure as described
When " " or "
BS2 within 5 minutes. Open valve A. If BS2 is not pushed within 5
minutes, a malfunction code will appear:
If
Heating operation
Cooling operation
If
" ", " ", or "
appears
" ", or " " appears
INFORMATION
In case a malfunction code occurred during this automatic
charging procedure, the unit will stop and indicate "
flashing. Push BS2 to restart the procedure.
INFORMATION
▪ When a malfunction is detected during the procedure
in
(e.g, in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
problems based on error
malfunction accordingly. Resetting the malfunction can
be done by pushing BS1. The procedure can be
restarted from
refrigerant" [ 4 29].
▪ Aborting the automatic refrigerant charge is possible by
pushing BS1. The unit will stop and return to idle
condition.
14.4.7 Step 6b: To manually charge refrigerant
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
when charging
malfunction accordingly. Resetting the malfunction can
be done by pushing BS3. The procedure can be
restarted
refrigerant" [ 4 29].
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
14 Piping installation
" starts flashing (ready for charging), push
Then
" " will be flashing. Push BS2 to
restart the procedure.
Malfunction code " " will appear. Push
BS1 to abort and restart the procedure.
Then
" Push BS1 to finish the automatic
charging function procedure. The
ambient conditions are favourable to
execute the test run.
The ambient conditions are NOT
favourable to execute the test run. Push
BS1 to finish the automatic charging
procedure.
"19.1 Solving
codes" [ 4 38] and solve the
"Step 6a: To automatically charge
"Error codes
refrigerant" [ 4 30] and solve the
from "Step 6b: To manually
Installation and operation manual
"
charge
29