Thanks GHAZ
That pressure doesn't sound out of the ordinary. Other considerations would be on a cooler day most of the chilled water valves would be shut, if installed the chilled water bypass valve may not be callibrated correctly to maintain the required system pressure differential, and most chillers would have around 20 to 60 psi press drop through the coooer, or the pump coud be oversized and the butterfly valve could be backed off to minimise cavitation.