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Charging refrigerant
Installer and user reference guide
112
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
b
Refrigerant R32 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 ±1 kg per minute.
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.
Prerequisite:
Turn on the power of the indoor units and outdoor unit.
6
Activate setting [2‑20] to start the manual additional refrigerant charge mode.
For details, see
"21.1.8 Mode 2: field settings"
Result:
The unit will start operation.
7
Open valve A and charge refrigerant until the remaining determined
additional refrigerant amount is added, and then close valve A.
8
Close valve A and press BS3 to stop the manual additional refrigerant charge
mode.
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
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 the test procedure described in
NOTICE
Make sure to open all stop valves after (pre-) charging the refrigerant.
Operating with the stop valves closed will damage the compressor.
NOTICE
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.
