To Charge Refrigerant: Flow Chart - Daikin RXYLQ10T7Y1B Series Installation And Operation Manual

R=[(X ×Ø22.2)×0.37+(X ×Ø19.1)×0.26+(X
1 2
(X ×Ø12.7)×0.12+(X ×Ø9.5)×0.059+(X
4 5
R Additional refrigerant to be charged [in kg and rounded off
to 1 decimal place]
X Total length [m] of liquid piping size at Øa
1...6
A, B Parameters A and B (see tables below)
▪ Parameter A:
In case of a multi-outdoor-unit system, add the sum of the
individual outdoor unit charge factors.
Parameter A
(a)
Piping length CR
≤30 m 105%<CR≤130%
>30 m 105%<CR≤130%
(a) Piping length is considered the distance from the outdoor
unit to the farthest indoor unit
CR Total indoor unit capacity connection ratio
14.4.4

To charge refrigerant: Flow chart

For more information, see "To charge
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
Step 2
• Open valves C and B to the liquid line
• Execute pre-charging amount: Q (kg)
R=Q
Step 3a
• Close valves C and B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Go to test run
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1B – 2020.10
×Ø15.9)×0.18+
3
×Ø6.4)×0.022]+A+B
6
A
8 HP 10~14 HP
0.5 kg
1.2 kg 1.5 kg
refrigerant" [ 4 26].
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
▪ Parameter B:
Parameter B
8+10 HP
3.5 kg
Metric piping. When using metric piping, replace the weight factors
in the formula by the ones from the following table:
Inch piping
Piping Weight factor
Ø6.4 mm 0.022
Ø9.5 mm 0.059
Ø12.7 mm 0.12
Ø15.9 mm 0.18
Ø19.1 mm 0.26
Ø22.2 mm 0.37
p < p >
A B
N2 R410A
R<Q
Step 3b
Close valves C and B
14 Piping installation
12+14 HP
3.8 kg
Metric piping
Piping Weight factor
Ø6 mm 0.018
Ø10 mm 0.065
Ø12 mm 0.097
Ø15 mm 0.16
Ø16 mm 0.18
Ø18 mm 0.24
Ø22 mm 0.35
C
R>Q
Continued on next page >>
Installation and operation manual
25