Atlas Copco GA 11+ Instruction Book page 87

Instruction book
Energy recovery system in use (see drawing)
Bypass valves in position (A): the heat exchanger (HE) is integrated in the water side of the ER.
• Compressor start-up
When the compressor is started up from cold, the oil temperature will be low. Bypass valve (BV1)
shuts off the oil supply to the oil cooling system to prevent the compressor oil from being cooled.
The oil flows from the oil separator vessel (AR) through the oil filter(s) (OF) back to compressor
element (E).
All energy input is used to rapidly warm up the compressor oil. No energy is recovered.
• Maximum energy recovery
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Position of bypass ball valves
Attention: It is NOT allowed to use the ball valves at an in-between position!
ER label
85