Specifications

Cat 604-3 5
Features and Benefits
The Compressor Technology
Cutting-edge magnetic bearing technology enables outstanding
energy efficiency and reliable, long-life operation. The
Magnitude chiller’s exceptional efficiency is due to the direct
drive magnetic bearing compressor technology. This design
eliminates the friction inherent in traditional centrifugal
compressors that can reduce efficiency.
A digitally-controlled magnetic bearing system replaces
conventional lubricated bearings. The direct drive motor
eliminates the need for a lubricated gear box and associated
power losses. The frictionless compressor shaft is the
compressor’s only moving component, and it levitates on a
magnetic cushion. Sensors at each magnetic bearing provide
real-time feedback to the bearing control system.
Figure 1: Compressor Rotating Assembly
Low Operating Costs
The Magnitude chiller Integrated Part Load Value (IPLV) is
extremely low when compared with any other chillers in this
tonnage range - as low as 0.312. (See page 6 for IPLV
definition and discussion). There is a potential for significant
energy savings at part load and lower ambient temperatures
compared to fixed-speed chillers.
Sustainable Performance
All oil-lubricated chillers will deposit oil on heat transfer
surfaces and eventually lose some efficiency. Since the
Magnitude chiller uses a positive pressure refrigerant (HFC-
134a) and has no oil, the industry-leading efficiency can be
maintained for the life of the chiller. Additionally, over time
negative pressure chillers (such as those using HCFC-123)
may draw air and moisture into the system, which can
significantly increase energy consumption.
Ultra-Smart Controls
It is only fitting that this revolutionary chiller design be
matched with the advanced Daikin McQuay MicroTech®
control technology to give you the ultimate in chiller
performance and control. Our control design includes many
energy-saving features and interface enhancements not found
in any other unit controller system on the market today.
The chillers utilize digital control electronics to proactively
manage unit operation and provide control of external chilled
water and cooling tower pumps. The compressor runs at the
minimum speed necessary to maintain cooling capacity and lift
(which decreases with lower condenser water temperatures),
thus minimizing energy usage over the entire range of
operating conditions. The innovative design of the MicroTech
E controller will help keep your chiller running efficiently...
day in, day out, for years to come.
Extremely Low Vibration Levels
As a result of the magnetic bearings and low inertia design, the
compressor vibration levels are extremely low, minimizing
vibration that could be transmitted to the structure.
The unit is shipped with rubber waffle mounting pads. Spring
vibration isolators are usually not required.
Low Sound Levels
Continuing the legacy of industry-leading sound levels, the
Magnitude chiller has lower sound levels than comparably
sized centrifugal chillers.
Oil-Free Design Benefits
Totally Oil-Free Operation = Greater Efficiency
With no oil to coat the heat transfer surfaces, a gain in
heat exchanger efficiency can be realized.
No Oil Loss = Sustainable Performance
With no possibility of oil loss at light loads or due to worn
seals, the original energy saving efficiency can be
maintained for the life of the chiller.
No Oil Handling Equipment = Greater Reliability
With magnetic bearings operating in a magnetic electrical
field instead of oil-lubricated bearings, the oil handling
equipment is removed. No need for:
• oil pumps
• oil reservoirs
• oil coolers
• oil filters
• water regulating valves
• oil relief valves
• oil system controls, starter, piping, heaters, etc...
that are needed to maintain oil quality. These devices can
be a fault source in traditional chillers, and removing
them significantly increases unit and system reliability.
No Oil System = Reduced Maintenance Costs
With oil removed from the system, oil samples, oil
changes, oil system maintenance, oil filter changes and
leaks are eliminated.