About Charging Refrigerant; To Determine The Additional Refrigerant Amount - Daikin VRV IV W+ Series Installer And User Reference Manual

18 | Piping installation

18.5.2 About charging refrigerant

18.5.3 To determine the additional refrigerant amount

Installer and user reference guide
96
NOTICE
In case of a multiple outdoor system, turn on the power of all outdoor units.
NOTICE
Be sure to turn ON the power 6 hours before operation in order to have power
running to the crankcase heater and to protect the compressor.
NOTICE
If operation is performed within 12 minutes after the indoor and outdoor units are
powered on, the compressor will not operate before the communication is
established in a correct way between outdoor unit(s) and indoor units.
NOTICE
Before starting charging procedures, check if the 7‑segment display indication of the
outdoor unit A1P PCB is as normal (see
malfunction code is present, see
4
codes" [ 136].
NOTICE
Close the front panel before any refrigerant charge operation is executed. Without
the front panel attached the unit cannot judge correctly whether it is operating
properly or not.
The outdoor unit is factory charged with refrigerant, but depending on the field
piping you have to charge additional refrigerant.
Make sure the outdoor unit's external refrigerant piping is checked (leak test,
vacuum drying).
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.
INFORMATION
For final charge adjustment in the test laboratory, please contact your local dealer.
NOTICE
The refrigerant charge of the system must be less than 100 kg. This means that in
case the calculated total refrigerant charge is equal to or more than 95 kg you must
divide your multiple outdoor system into smaller independent systems, each
containing less than 95 kg refrigerant charge. For factory charge, refer to the unit
name plate.
In case of heat pump system
Formula:
"20.2.4 To access mode 1 or
"23.1 Solving problems based on error
VRV IV water-cooled system air conditioner
4
2" [ 118]). If a
RWEYQ8~14T9Y1B
4P452191-1B – 2020.10