Daikin VRV IV Series - To Charge Refrigerant

16 | Piping installation
Installer and user reference guide
84
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
Parameters A and B:
Model A B
RKXYQ5 0.8 3.1kg
RKXYQ8 1.0 2.6kg
Metric piping. When using metric piping, replace the weight factors in the formula
by the ones from the following table:
Inch piping Metric piping
Piping Weight factor Piping Weight factor
Ø6.4mm 0.022 Ø6mm 0.018
Ø9.5mm 0.059 Ø10mm 0.065
Ø12.7mm 0.12 Ø12mm 0.097
16.4.4 To charge refrigerant
Charging refrigerant consists of 2 stages:
Stage Description
Stage 1: Pre-charging Recommended in case of larger systems.
Can be skipped, but charging will take longer then.
Stage 2: Manual charging Only necessary if the determined additional
refrigerant amount is not reached yet by pre-
charging.
Stage 1: Pre-charging
Summary – Pre-charging:
Refrigerant bottle Connected to the service ports of the stop valves.
Which stop valves to use depends on the circuits you
choose to pre-charge to:
▪ Circuits 1 and 2 together (manifold with refrigerant
line splitters required).
▪ First circuit 1, then circuit 2 (or vice versa).
▪ Only circuit 1
▪ Only circuit 2
Stop valves Closed
Compressor Does NOT operate
1 Connect as shown (choose one of the possible connections). Make sure that
all compressor unit stop valves, as well as valve A are closed.
Possible connections: