Reference Designation
1 Water inlet pipe
2 Water outlet pipe
3 Temperature sensor, water inlet pipe
4 Temperature sensor, water outlet pipe
5 Oil drain plug
6 Oil flexible from compressor oil separator vessel to ER unit
7 Oil flexible from ER unit to oil filter housing
PRV Pressure relief valve
BV2 Location of heat exchanger by-pass valve (BV2)
HE Heat exchanger
V1 Selector valve
AR Oil separator tank
OF Oil filter housing
BV1 Location of oil cooler bypass valve (BV1)
Field installation
The main components are assembled ex-factory as a compact unit which fits inside the bodywork
of the compressor. Consult your dealer for installing and connecting the energy recovery unit.
6.2 Energy recovery systems
General
The energy recovery systems can be applied as low temperature rise/high water flow systems or
as high temperature rise/low water flow systems.
Low temperature rise/high water flow systems
For this type of application, the temperature difference between the water in the energy recovery
system and the compressor oil is low. As a consequence, a high water flow is needed for
maximum energy recovery.
Example: The heated water is used to keep another medium at a moderately high temperature, in
a closed circuit, e.g. central heating.
High temperature rise/low water flow systems
For this type of application, a high water temperature rise in the energy recovery system is
obtained, which consequently brings on a low flow rate.
Example: An open circuit where cold water from a main supply is heated by the energy recovery
system for use in a factory, e.g. pre-heating of boiler feed water.
Instruction book
2920 7109 51 107
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