Sinclair MS-E48AIN, Service Manual

Page: 52 / 100

5.10 Refrigerant Charging
The refrigerant has been charged into the outdoor unit before shipped from the manufacturer, while
additional refrigerant still need be charged into the refrigerant pipe during the field installation.
5.10.1 Calculation of the Additional Refrigerant Charging
1) Get the refrigerant charge of the outdoor unit from the nameplate.
Note:
‹
The refrigerant charge of the outdoor unit does not include the charged additionally in the indoor unit,
DB module and the refrigerant pipe.
‹
For the length of the connecting pipe is decided on the field, the amount of additional refrigerant shall
be decided depending on the dimension and the length of the liquid pipe used on the field.
‹
Record the additional refrigerant charge for future maintenance.
‹
It does not need to add refrigerant if the total length of liquid pipe is within 30m.
2) Calculating the Mass of Additional Refrigerant
Additional Refrigerant Charge (kg) =
Σ
the Liquid Pipe Length of
Φ
6.35
×
0.022kg/m +
Σ
the Liquid Pipe
Length of
Φ
9.52
×
0.054kg/m
-
1.47(kg)
‹
If the additional refrigerant charge is negative, it does not need to add the refrigerant.
3) Example: MS-E56AIN
Serial No. Model
Indoor unit 1 Cassette type MC-C12AI
Indoor unit 2 Duct type MC-D09AI
Indoor unit 3 Wall mounted type MS-H07AIZ
Indoor unit 4 Wall mounted type MS-H09AIZ
Indoor unit 5 Duct type MC-D09AI
Indoor unit 6 Wall mounted type MS-H09AIZ
Serial No. Diameter(mm) Length(m)
L1
Φ
9.52 20
L2
Φ
9.52 10
L4
Φ
9.52 10
1A
Φ
6.35 5
1B
Φ
6.35 5
1C
Φ
6.35 5
2A
Φ
6.35 5
2B
Φ
6.35 5
2C
Φ
6.35 5
DB
DB
47