To Charge Refrigerant - Daikin RDXYQ5T8V1B Installer And User Manual

16 | Piping installation

16.4.4 To charge refrigerant

Installer and user reference guide
84
Parameters A and B:
Model
RKXYQ5
RKXYQ8
Metric piping. When using metric piping, replace the weight factors in the formula
by the ones from the following table:
Inch piping
Piping
Ø6.4 mm
Ø9.5 mm
Ø12.7 mm
Charging refrigerant consists of 2 stages:
Stage
Stage 1: Pre-charging
Stage 2: Manual charging Only necessary if the determined additional
Stage 1: Pre-charging
Summary – Pre-charging:
Refrigerant bottle
Stop valves
Compressor
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:
A
0.8
1.0
Weight factor
0.022
0.059
0.12
Recommended in case of larger systems.
Can be skipped, but charging will take longer then.
refrigerant amount is not reached yet by pre-
charging.
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
Closed
Does NOT operate
B
3.1 kg
2.6 kg
Metric piping
Piping Weight factor
Ø6 mm 0.018
Ø10 mm 0.065
Ø12 mm 0.097
Description
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12