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Thanks, Chilbrig. I do have confidence in these chillers. They have apparently fared well cooling the London Millenium Dome.

Is it because the evaporator is flooded that to avoid liquid slop-over...

Anybody have any experience of knowledge on/of Carrier's 30GX-122A-PEE R134a twin screw water chiller?

So far I'm pretty confident in specifying this chiller for a London project.

30RB0432---PEE - Multiple Scrolls - R410A

Another chiller system I have been asked to consider for a project. Any comments on this reasonably new product?

What's the latest, with regards to reliability, on the McQuay Stargate Single-Screw Compressors (Frame 3200)?

Any opinions, experiences ??

1) Pump Down - Will work if LLSV is not leaky. Will still work if LP control is bust except the compressor might bust next.

2) Fans Off - Coil will of course not defrost properly if the fans do...

Indeed, whenever temperature is controlled by thermostat and refrigeration is stopped by either pump down or simultaneous compressor and solenoid shutdown then the solenoid valve would, eventually,...

Our Company's Standard Freezer Room Defrost Philosophy:

1) Close liquid line solenoid valve for refrigerant pump-out. (Stops cooling and prevents migration from evaporator to compressor).
2) Turn...