Daikin VRV 5 - About Charging Refrigerant; About the Refrigerant

19 | Charging refrigerant
Installer and user reference guide
109
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
NOTICE
In case of maintenance and the system (outdoor unit+field piping+indoor units) does
not contain any refrigerant any more (e.g., after refrigerant reclaim operation), the
unit has to be charged with its original amount of refrigerant (refer to the nameplate
on the unit) and the determined additional refrigerant amount.
NOTICE
▪ Ensure that contamination of different refrigerants does not occur when using
charging equipment.
▪ Charging hoses or lines shall be as short as possible to minimise the amount of
refrigerant contained in them.
▪ Cylinders shall be kept in an appropriate position according to the instructions.
▪ Ensure that the refrigerating system is earthed prior to charging the system with
refrigerant. See "20.2 To connect the electrical wiring to the outdoor
unit"[4124].
▪ Label the system when charging is complete.
▪ Extreme care shall be taken not to overfill the refrigerating system.
NOTICE
Prior to charging the system, it shall be pressure tested with the appropriate purging
gas. The system shall be leak tested on completion of charging but prior to
commissioning. A follow up leak test shall be carried out prior to leaving the site.
19.2 About charging refrigerant
The outdoor unit is factory charged with refrigerant, but depending on the field
piping you have to charge additional refrigerant.
Before charging refrigerant
Make sure the outdoor unit's external refrigerant piping is checked (leak test,
vacuum drying).
Typical workflow
Charging additional refrigerant typically consists of the following stages:
1 Determining how much you have to charge additionally.
2 Charging additional refrigerant (pre-charging and/or charging).
3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of
the outdoor unit.
19.3 About the refrigerant
CAUTION
See "3Specific installer safety instructions"[414] to acknowledge all related safety
instructions.
This product contains fluorinated greenhouse gases. Do NOT vent gases into the
atmosphere.
Refrigerant type: R32