Blue Box SIGMA 2002 - Pressure Relief Valves; Water Quality

Blue Box - 40
4.10 PRESSURE RELIEF VALVES
Pressure relief valves are fitted on the high pressure side and low pressure side of the refrigerant circuit. The
valves must be vented, to outdoors, through a vent pipe.
The vent pipe must be sized no smaller than the relief valve and it must not be supported from the valve.
Caution: The relief valve must be directed into a safe zone where no
injuries can be caused to people.
4.11 WATER QUALITY
When well or river water is applied for chilled water or condenser water, corrosion or debris problems may occur
due to water quality. It is therefore necessary to analyse the quality of water by checking pH, electrical conductivity,
ammonia ion content, sulphur and chloride content, total hardness, etc. and where necessary provide chemical
treatment.
TABLE 3 - CONNECTION PIPE EXTERNAL DIAMETERS FOR VERSIONS LC/HP
MODEL
SIGMA 2002
LC/HP
Suction Liquid Suction Liquid Suction Liquid
[Delivery] [Suction] [Delivery] [Suction] [Delivery] [Suction]
[mm] [mm] [mm] [mm] [mm] [mm]
3.2 35 18 35 18 42 18
4.2 35 22 42 22 42 22
5.2 35 22 42 22 42 22
6.2 42 22 42 22 42 22
7.2 42 28 42 28 42 28
8.2 42 28 54 28 54 28
9.2 54 28 54 28 54 28
10.2 54 28 54 28 54 28
12.2 54 35 54 35 54 35
13.2 54 35 67 35 67 35
14.4 42 28 42 28 54 28
16.4 42 28 54 28 54 28
18.4 54 28 54 28 54 28
20.4 54 28 54 28 54 28
24.4 54 35 54 35 67 35
26.4 54 35 67 35 67 35
Diameter connection pipes between unit
and remote condenser/evaporator
Distance between unit and remote condenser/evaporator [m]
10 20 30