McQuay M5WSS Manuel d'installation Page 37

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Unit has to be sufficiently vacuumed to -0.1MPa (-76cmHg). Leave the vacuum for 5 minutes to ascertain
the gauge pointer do not raise again.
Refrigerant Piping Length, Elevation and Bends
When piping length becomes too long, both the capacity and reliability drop. As the number of bends
increases, system-piping resistance to the refrigerant flow increase thus lowering the capacity of the unit
and as a result the compressor may become defective. Always choose the shortest path and follow the
recommendation as tabulated below.
34
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