Multistack Flooded Chiller
Multistack Flooded Chiller
Multistack Flooded Chiller
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<strong>Multistack</strong> <strong>Flooded</strong> <strong>Chiller</strong><br />
Oil-Free MagLev Centrifugal Compressors-<br />
The direct result of aerospace and industrial technologies converging with<br />
advanced digital controls to provide a light weight, mechanically robust twostage<br />
centrifugal compressor. This technology allows for industry leading<br />
energy efficiency, reliability, and redundancy through the use of multiple<br />
smaller compressors on a common refrigerant circuit. Compressors feature a<br />
patented magnetic bearing system that eliminates vibration with only one<br />
major moving part. This design leads to ultra quiet operation with sound<br />
levels as low as 70 DBA.<br />
FlexSys Control System with 15” Touch Screen-<br />
At the heart of every MagLev chiller is the FlexSys control system with a 15” touch<br />
screen. With the most advanced technology found in the HVAC industry, FlexSys<br />
opens a whole new world of compressor control, chiller control, and system control.<br />
Please see the controls overview on Page 10 for additional information.<br />
Compressor Hub System-<br />
The FlexSys Hub System isolates all compressor communication, interlocks,<br />
and safeties locally within each compressor. This feature allows for precise<br />
control, maximum redundancy, and efficient real time communication to<br />
each compressor through an Ethernet connection. Available in the first<br />
quarter of 2010, each hub will feature a small micro processor that will act<br />
as a bypass to each compressor for redundancy usually reserved for mission<br />
critical applications.<br />
Dual Electronic Expansion Valves Standard-<br />
All <strong>Multistack</strong> MagLev chillers with multiple compressors feature two<br />
electronic expansion valves for maximum redundancy and reliability. This<br />
feature allows the chiller to run on one or two valves to always meter the<br />
proper amount of refrigerant. By using electronic valves in conjunction<br />
with level control, MagLev chillers are able to unload further than chillers<br />
with one large EXV, TXVs, or orifices.<br />
First-In-Class Electrical Enclosures-<br />
All enclosures on <strong>Multistack</strong> MagLev <strong>Flooded</strong> <strong>Chiller</strong>s are UL<br />
listed and built to NEMA 3R specifications. Features include:<br />
fully vented, louvered panels with FlexSys controlled cooling<br />
fans for maximum energy efficiency. A modular panel design<br />
provides simplistic trouble shooting, voltage separated<br />
cabinets for maximum resistance to transient voltages, EMI<br />
noise and increased safety.<br />
Individual Breakers-<br />
The need to isolate each compressor with individual breakers, while allowing other<br />
compressors to operate, only makes sense. This provides for better serviceability<br />
and redundancy. Ninety-five percent of all MagLev <strong>Flooded</strong> chillers in the world<br />
today are built using multiple compressors.<br />
Single Point Of Electrical Connection-<br />
Field installation time is decreased by MagLev single point<br />
electrical connection design. <strong>Chiller</strong> mounted breaker is<br />
optional and can be specified.<br />
Condenser Liquid Level Sensor-<br />
All <strong>Multistack</strong> MagLev flooded chillers are equipped with a condenser liquid level sensor. In<br />
addition, there is a second sight glass located on the side of the level sensor, mounted off the<br />
condenser. The canister has a full length sightglass providing a window for the technician to see<br />
what is happening with liquids and ensure proper system operation.
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