UK BIGRAC GEN 26 LR - Flipbook - Page 73
RANGE
COMMERCIAL
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
1/2 H, H*
External diameter
Ø6,35
Ø9,52
Ø12,70
Ø15,88
Ø19,05
Ø22,22
Ø25,40
Ø28,58
Thickness
0,80
0,80
0,80
1,00
1,00
1,00
1,00
1,00
Ø19,05
Ø15,88
Ø19,05
Ø15,88
*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
Type 71
Ø9,52
Ø12,70
Ø15,88
Ø12,70
10 m (10 m)
10 m (10 m)
30 m (30 m)
Additional refrigerant charging amount per 1 m
PZH4
Ø12,70
Ø15,88
60 m
20 g/m
Type 100 ~ 140
80 g/m
100 m
85 m (30 m)
35 m (15 m)
40 g/m
Type 71
10 m (10 m)
PZH3
30 m (30 m)
10 m (10 m)
Type 100 ~ 140
Standard
50 m (30 m)
20 g/m
25 m (15 m)
85 m (30 m)
35 m (15 m)
45 g/m
35 m (15 m)
80 g/m
Standard
50 m (30 m)
Type 100 ~ 140
35 m (15 m)
80 g/m
Standard
85 m (30 m)
Additional gas
Ø19,05
25 m (15 m)
30 g/m
Additional refrigerant charging amount per 1 m
PZ3
Ø19,05
Standard
40 m (10 m)
Liquid pipe
PZH4
Ø12,70
Ø15,88
Tentative data
Type 25
PZ3
Ø12,70
50 m (30 m)
25 m (15 m)
25 m (15 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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