UK BIGRAC GEN 24 - Flipbook - Page 69
COMMERCIAL
COMMERCIAL INDEX
Refrigerant piping size and allowable piping length.
Check if reuse of existing refrigerant piping is possible based on the following chart.
The standards other than this one (difference of elevation, etc.) are identical to the requirements of ordinary refrigerant
piping.
Table 1 - Reusable existing piping (mm)
Material
O
External diameter
Thickness
1/2 H, H*
Ø6,35
Ø9,52
Ø12,70
Ø15,88
Ø19,05
Ø22,22
Ø25,40
Ø28,58
0,80
0,80
0,80
1,00
1,00
1,00
1,00
1,00
* It is impossible to reuse the size of Ø19.05, Ø22.22, Ø25.4 and Ø28.58 for material O. Change to material 1/2H or material H.
Table 2 - 1 Refrigerant piping size: 2,5 - 14,0 kW type (mm)
Liquid pipe
Ø6,35
Gas pipe
PZH3
Ø9,52
Ø9,52
Ø12,70
Ø15,88
Additional gas 15 g/m
Standard
40 m (30 m)
Type 36
Additional gas 10 g/m
Standard
15 m (7,5 m)
Type 50
Additional gas 15 g/m
Standard
20 m (7,5 m)
Type 60
Additional gas 15 g/m
Standard
30 m (7,5 m)
Type 71
Additional gas 17 g/m
Type 36 ~ 60
Ø6,35
Gas pipe
Ø9,52
Ø15,88
Ø19,05
Ø15,88
Ø9,52
Ø12,70
Type 71
Ø15,88
10 m (10 m)
PZH3
10 m (10 m)
Ø12,70
Ø15,88
30 m (30 m)
Standard
50 m (30 m)
Type 100 ~ 140
20 g/m
85 m (30 m)
35 m (15 m)
50 m (30 m)
25 m (15 m)
45 g/m
Type 50
PZ2
Type 60 ~ 71
Standard
40 m (30 m)
40 m (30 m)
20 m (15 m)
20 m (15 m)
10 m (10 m)
10 m (10 m)
30 m (20 m)
Standard
50 m (20 m)
Additional refrigerant charging amount per 1 m
Type 60 ~ 71
PZH2
20 g/m
40 g/m
10 m (10 m)
Standard
50 m (30 m)
30 m (30 m)
10 m (10 m)
35 m (15 m)
80 g/m
Standard
50 m (30 m)
Additional gas
Ø19,05
25 m (15 m)
45 g/m
Type 100 ~ 140
PZH2
Ø19,05
Ø12,70
Standard
85 m (30 m)
Additional gas
PZ2
Ø19,05
Standard
40 m (10 m)
Liquid pipe
PZ3
Ø12,70
Ø15,88
Tentative data
Type 25
PZ3
Ø12,70
25 m (15 m)
80 g/m
25 m (10 m)
80 g/m
25 m (15 m)
Type 100 ~ 140
Standard
75 m (30 m)
75 m (30 m)
35 m (15 m)
35 m (15 m)
Type 100 ~ 140
Standard
50 m (30 m)
50 m (30 m)
25 m (15 m)
25 m (15 m)
Additional refrigerant charging amount per 1 m
20 g/m
50 g/m
80 g/m
How to see table definition (example):
In case of type 71, standard size is liquid pipe Ø9,52 / gas pipe Ø15,88.
There is a limitation to liquid pipe Ø9,52 / gas pipe Ø12,70 and to liquid pipe Ø12,70 / gas pipe Ø15,88.
However, they are applicable for different diameter’s pipes.
Table 2 - 2 Refrigerant piping size: 20,0 - 25,0 kW type (mm)
Liquid pipe
Ø9,52
Gas pipe
Ø19,05
PZH4
Ø12,70
Ø22,22
Ø25,40
Type 200 ~ 250
Additional refrigerant charging amount per 1 m
Allowable
Cooling capacity down
Limited piping length
Unallowable
Ø15,88
Ø19,05
Ø22,22
Ø25,40
Ø19,05
Ø22,22
Ø25,40
100 m (30 m)
Standard
100 m (30 m)
100 m (30 m)
65 m (20 m)
65 m (20 m)
65 m (20 m)
80 g/m
80 g/m
80 g/m
120 g/m
120 g/m
120 g/m
50 m Maximum piping length
(50 m) Charge less piping length in a single connection
Table 3 - Deterioration Criteria for Refrigerant Oil
0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
6,5
7,0
7,5
8,0
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