Pressure/Temperature Table - Daikin EWWD-VZ Installation, Maintenance And Operating Manual

Water-cooled water chillers with variable speed compressor

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Operation manual (84 pages)

Table Of Contents

Table of Contents

purge circuit with inert gas (e.g. nitrogen);

evacuate to a pressure of 0,3 (abs.) bar (or 0,03 MPa);

purge again with inert gas (e.g. nitrogen);

open the circuit.

The area should be checked with an appropriate refrigerant detector prior to and during any hot

work to make the technician aware of a potentially flammable atmosphere.

If compressors or compressor oils are to be removed, it should be ensured that it has been

evacuated to an acceptable level to ensure that there is no flammable refrigerant remaining

within the lubricant.

Only refrigerant recovery equipment designed for use with flammable refrigerants should

be employed.

If the national rules or regulations permit the refrigerant to be drained, this should be done safely,

using a hose, for example, through which the refrigerant is discharged into the outside

atmosphere in a safe area. It should be ensured that an inflammable explosive refrigerant

concentration cannot occur in the vicinity of an ignition source or penetrate into a building under

any circumstance.

In the case of refrigerating systems with an indirect system, the heat-transfer fluid should be

checked for the possible presence of refrigerant.

After any repair work, the safety devices, for example refrigerant detectors and mechanical

ventilation systems, should be checked and the results recorded.

It should be ensured that any missing or illegible label on components of the refrigerant circuit is

replaced.

Sources of ignition should not be used when searching for a refrigerant leak.

4.2