6
RAU-SVX01G-GB
Installation
Table 1 –
Dimensions of recommended slings and swing-bar:
190
260
300
350
400
450
500
600
700
800
A (mm)
1500
1500
1500
1500
1500
1500
2400
2400
2300
2300
B (mm)
1800
1800
1800
1800
1800
1800
1800
1800
2200
2200
Weight - crated (kg)
555
625
691
869
959
985
1123
1251
1695
1754
Refrigerant lines
Figure 2 –
Refrigerant fl ow chart
1 = Compressor
2 = Condenser coil
3 = Subcooler coil
4 = Schraeder valve
5 = Coil header
6 = Relief valve
7 = High pressure switch
8 = Low pressure transducer
9 = High pressure transducer
10 = Stop valve
Calculating and fi xing the capacity of refrigerant lines is necessary to assure the oil return to the compressor, avoid
refrigerant phase changes and limit pressure drop.
Liquid lines
Calculate capacity of liquid line, as per the following criteria.
1.
Maximum load operating conditions.
2. To avoid any evaporation risk:
– Consider the vertical risers
– Maximum pressure drop must not exceed 1 to 2°C
3. Liquid circulation speed in a 0.5 to 2m/s range.
Discharge lines
Discharge lines should be calculated to obtain the gas displacement speed in horizontal and vertical lines required to
drive compressor oil. Determine diameter of discharge lines as per the following criteria.
1.
Speed above 2.5 m/s horizontally. (Consider minimum speed at minimum load).
2. Speed above 5.0 m/s vertically (Vertical risers, consider speed at minimum load).
3. Maximum speed 20 m/s.
4. Horizontal pipe run must be pitched of 1cm/m in the same direction as the refrigerant circulation.
5. An oil trap is necessary for vertical risers greater than 3m. For major elevations add an intermediate oil trap
every 5m.
6. Maximum pressure drop between 20 to 50 kPa.
7.
Install a fi lter drier adapted to refrigerant capacity.
Summary of Contents for RAUL 190
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