14 Piping installation
Installation and operation manual
27
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
14.4.4
To charge refrigerant: Flow chart
29].
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
Step 2+3
• Close valves C, D and A
• Open valve B to the liquid line
• Execute pre-charging amount: Q (kg)
• Disconnect the manifold from the gas line and the high pressure/low
pressure gas line
Step 4a
• Close valve 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
Step 4b
Close valve B
R=Q
R>Q
R<Q
Continued on next page >>
p< p>
R410A
N2
C
D
A
B
Summary of Contents for REYQ8U7Y1B
Page 51: ......
