5 Installation
Installation and operation manual
16
RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1 – 2018.07
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
Inch piping
Metric piping
Piping
Weight factor
Piping
Weight factor
Ø15.9 mm
0.18
Ø15 mm
0.16
Ø16 mm
0.18
Ø19.1 mm
0.26
Ø18 mm
0.24
Ø22.2 mm
0.37
Ø22 mm
0.35
5.6.4
To charge refrigerant: Flow chart
For more information, see
"5.6.5 To charge refrigerant" on page 17
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
Step 2
• Open valves C and B to the liquid line
• Execute pre-charging amount: Q (kg)
Step 3a
• Close valves C and B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Go to test run
Step 3b
Close valves C and B
R=Q
R>Q
R<Q
Continued on next page >>
p< p>
R410A
N2
C
A
B
Summary of Contents for VRV IV RXMLQ8T7Y1B Series
Page 37: ......
Page 38: ......
Page 39: ......
Page 40: ...4P543426 1 2018 07 Copyright 2018 Daikin 4P543426 1 0000000M...