APC INROOM ACPSC3000 Operations Instructions download pdf (Page 79)

InRoom CW/DX – Operating Instructions 79

10.5 Water circuit

Check the water circuit visually for leaks. A level indicator on the storage tank, if applicable, provides a visual

indication of changes in the water level. Lower water levels allow air in the circuit which reduces the heat

transfer capacity of the chilled water circuit and is detrimental to the operation of the pump.

Condenser (only on G, GE, GCW units)

Check for water side contamination of the plate condenser by comparing the cooling water inlet temperature

to the outlet temperature. If the difference is less than 3 K (5.4 R), the water ﬂ ow may be obstructed causing

heat transmission to be reduced.

Also, compare the outlet temperature with the medium condensation temperature (by measuring the con-

densation temperature at the high pressure side of the compressor). If this difference exceeds 7K (12.6 R),

the condenser is probably obstructed.

In this case the condenser should be ﬂ ushed and cleaned chemically.

10.6 Unit in general

Electric panel

Warning:

Follow proper lockout/tagout procedures when disconnecting power from the unit.

Check the connection terminals for tightness when the unit is installed.

General Maintenance

Clean the inside of the cabinet with a vacuum cleaner. Clean pipes to simplify the search for leaks. Check

the pipes, the compressor and the condenser for a tight seat. Vibrations of pipes and circuit components can

result in leaks. Also check the insulation of the water piping. Condensing air humidity on cold water pipes

indicates a loss of cooling capacity.

10.7 Competences

All repairs must be made by an APC certiﬁ ed service technician.

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APC INROOM ACPSC3000 Operations Instructions Page 79