York JVOHQ Series Installation & Maintenance Manual page 59

8.3 Calculating Refrigerant's Additional Charge
Although the unit is charged with refrigerant, the supplementary refrigerant quality is determined and
charged into the system based on the length of refrigerant piping. The actual additional charge volume
is determined according to the following requirements.
After completing the charging, report the additional charge to the local service center.
1. Calculation method of additional refrigerant filling amount is given in the below table:
Sl
Symbol
No.
Calculation method of the amount of refrigerant added to the liquid pipe (W1 kg)
Piping
diameter
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
ø22.2
ø25.4
ø28.58
1 W1
NOTE:
If the indoor units are all Cassette, in addition the models are
JDCK028H0PAGQ,JDCK040H0PAGQ,JDCK080H0PAGQ,JDCK090H0PAGQ,
the minimum amount of additional refrigerant W1 is shown in the table below
Outdoor Unit HP
W1: the minimum
amount of additional
refrigerant (kg)
Outdoor Unit HP
W1: the minimum
amount of additional
refrigerant (kg)
Calculation method of additional refrigerant charge in indoor unit (W2 kg)
Indoor Unit model
18 ~ 36 type
40 ~ 160 type
2 W2
224 and above
NOTE:
The maximum amount of refrigerant additional to the indoor unit W2 is 6.0kg
Indoor unit connection ratio (total indoor unit capacity / outdoor unit capacity)
Additional charge (W3 kg)
Indoor capacity ratio
3 W3
<100%
100% to 130% or less
4 W
Table 8.1 Additional Refrigerant Charge Calculation
Piping total Supplementary refrigerant charging
length (m) amount for 1m total length of piping
m
m
m
m
m
m
m
m
Total additional charge of liquid pipe =
8~10 12 14~18
2 3
50 52~58 60~66
9 10
Total additional charge ( W kg) = W1+W2+W3
Content
x 0.03=
x 0.06=
x 0.12=
x 0.19=
x 0.28=
x 0.36=
x 0.52=
x 0.67=
20~24 26 28~34
3 4 5
68~72 74 76~78
11 12 13
Refrigerant additional charge(kg/unit)
0.3
0.5
1.0
Refrigerant additional charge(kg)
0
0.5
55
Additional charge
(kg)
kg
kg
kg
kg
kg
kg
kg
kg
kg
36~42 44~48
6 7 8
80~96
14 16
Additional
Charge
kg
kg
kg