Installation guide

Warning
Please Note
The specifications of the product detailed on this
Set-Up Guide may change without notice. RDM
Ltd. shall not be liable for errors or for incidental
or consequential damages, directly and indirectly,
in connection with the furnishing, performance or
misuse of this product or document.
Ensure that all power is
switched off before
installing or maintaining
this product
Revision 2.7 Page 21 of 83
Mercury Plant Controller Installation Guide
Example: Danfoss AKS 33 with range: -1 bar to 12 bar
Span would be 190 (13 bar)
Offset would be -15 (-1 bar)
**Run smallest = on : - When all compressors are off (because the target pressure has been satisfied) the
controller, when the pressure rises, will always turn on the smallest compressor after the variable output has
reached 100%. If the ASC timer is running for the smallest compressor, the controller will NOT bring on any other
available compressors, the variable output will remain at 100% and the controller will wait until the ASC timer has
elapsed and then turn on the smallest.
Please note that this is true for any pressure condition.