Unit installation

Use and Maintenance Manual Air-cooled water chillers and Heat Pumps R-PAE/R-PAH/EAH Rev. 1 del 03/09
5.8 Special maintenance operations
The operations listed here below must be performed only by skilled service personnel equipped with the suitable
equipment and only when the unit is stopped and disconnected from the power supply.
Operation Frequency
1 Filling up of compressor oil when necessary
2 Replacement of crankcase oil when necessary
3 Replacement of compressor valves when necessary
4 Check of cooling group performance when necessary
5 Setting of cooling group pressure switches when necessary
6 Replacement of cooling group pressure switches when necessary
7 Replacement of filter cartridge when necessary
8 Replacement of dehydrating filters when necessary
9 Setting of cooling circuit valves when necessary
10 Replacement of the cooling circuit valves when necessary
11 Filling up / replacement of refrigerant when necessary
12 Compressor replacement when necessary
13 Replacement of compressor lubricant pump when necessary
14 Heat exchanger replacement when necessary
15 Condensing coil replacement when necessary
16 Circulating pump replacement when necessary
For all the above mentioned operations and for any other operations not completely described on this manual, it is
necessary to contact EMICON A.C. S.p.A. After Sales Service. To guarantee the unit a long operation life and to keep
it always in the best efficiency conditions and to increase its service reliability, it is highly recommended to contact
EMICON A.C. S.p.A. After Sales Service to draw up a maintenance contract.
5.8.1 Process water
The process water cooled by the unit circulates into a closed circuit and for special applications it may be mixed with
anti-freeze substances. The fluid temperature is usually over +5°C and the unit has internal control devices which
prevent it from freezing with consequent damage of the gas-water exchanger. The process water must be regularly
checked in order to avoid:
1. being polluted with substances which may damage the cooling circuit components (for ex. If the water is used to
cool chemical distillers which produce corrosive liquids, it may happen that the water becomes corrosive itself because
of troubles in the exchange circuit supplied).
2. acidification due to the decomposition and toning of the antifreeze substances used in the applications with working
temperatures below +5°C.
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