Chicago Pneumatic CPC 40 G, Instruction Book

Page: 103 / 130

10.1.4 Maintenance
Compressor oil
For references used consult section Energy recovery
Oil change:
1. Check if the wheel (V1) is totally turned in clockwise (energy recovery in use).
2. Run the unit until warm. Stop the unit, switch off the isolating switch and close the air outlet valve of
the compressor.
3. Depressurize the compressor and drain the oil by opening the drain valve on the oil separator vessel.
See Oil and oil filter .
4. Resume oil change as described in section Oil and Filter Change in this book.
Thermostatic bypass valves
The inserts (thermostats) must be replaced by new ones when abnormal function is noticed. Examples:
regulating temperature is not within the normal range, ER heat exchanger remains cold,...
Heat exchanger (HE)
If the temperature rise over the energy recovery system declines over a period of time with the same basic
working conditions, the heat exchanger should be inspected. To clean the oil side, soak the heat exchanger
in a degreasing solution. To remove scale formation in the water compartment, a proper descaling process
should be applied. Consult your customer centre.
10.1.5 Energy recovery data
Reference conditions
See section Reference conditions and limitations .
Effective working pressure
Consult section Compressor data for the normal working pressure.
Maximum allowed pressure of the heat exchanger
Oil side 15 bar (217 psi)
Water side 10 bar (145 psi)
Reading settings
In addition to other data, the following temperatures can be read on the Elektronikon display:
For air-cooled units:
• The water inlet temperature of the energy recovery system
• The water outlet temperature of the energy recovery system
For water-cooled units:
• The water inlet temperature of the energy recovery system
• The water outlet temperature of the energy recovery system
Instruction book
2920 7101 41 101