To Charge Refrigerant: Flow Chart - Daikin VRV IV+ RYYQ8U7Y1B Series Installer And User Manual

17 | Piping installation

17.4.4 To charge refrigerant: Flow chart

For more information, see
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Step 2+3
• Open valves C, D and B to the liquid and equalising line
• Charge the equalising line to maximally 0.05 MPa, then close valve C and
disconnect its connection to the manifold. Continue pre-charging through
the liquid line only
• Execute pre-charging amount: Q (kg)
R=Q
Step 4a
• Close valves D and B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Input the additional refrigerant amount via
setting [2-14]
• Go to test run
Installer and user reference guide
100
"17.4.5 To charge refrigerant" [
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
4
102].
p < p >
A B
N2 R410A
R<Q
D
C
R>Q
Step 4b
Close valves D and B
Continued on next page >>
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11