JOHNSON CONTROLS
FORM 160.84-EG1 (617)
6
SUSTAINABILITY
Ninety-eight percent of the global-warming potential (GWP) of a centrifugal chiller is from
the indirect effect – or the greenhouse gases generated in the production of electricity to
run the chiller. Two percent of the GWP is from the direct effect or release of the refrigerant
gases into the atmosphere.
To address the direct effect, the YMC² chiller first reduces the chances for refrigerant leaks
by dramatically reducing the number of connections, down 57% compared to traditional
chiller designs. Then we have employed falling-film evaporator technology that reduces
the overall refrigerant charge by up to 30% and improves the efficiency of the evapora-
tor. This can help qualify your project for up to 2 more LEED points using the advanced
refrigerant-management credit. Finally, by eliminating the lubrication system, the YMC²
chiller lets you avoid all the environmental issues of handling and disposing refrigerant
saturated oil. Add it all up and you will see why you can count on the YMC² chiller to yield
a positive environmental result.
The YMC² chiller employs the most environmentally friendly refrigerants available, HFC-
134a or HFC-513A with no Ozone Depletion Potential and no phase-out date per the
Montreal Protocol.
Utilizing HFC-134a or HFC-513A will achieve better results than the soon-to-be phased-
out HCFC-123 when using the US Green Building Council's (USGBC) Template EAc4
(Enhanced Refrigerant Management) to calculate the refrigerant impact of your project.
The heat exchangers utilized on the YMC² chiller introduce a proprietary falling-film evap-
orator design that helps not only operate more efficiently, but also allows us to reduce our
refrigerant charges up to 30% beyond conventional chiller designs.
To ensure maximum efficiency, the YMC² chiller utilizes a hermetically sealed, permanent-
magnet motor. The compressor is directly driven by the motor, eliminating any losses from
using gears for power transmission. Active magnetic bearings are used to support the mo-
tor shaft allowing this chiller series to be completely OIL FREE, with no oil management
system required.
OPTISOUND™ CONTROL
YMC² chillers are equipped with the YORK OptiSound Control as standard. OptiSound
Control is a patented combination of centrifugal-chiller hardware and software that re-
duces operational sound levels, expands the chiller operating range, and improves chiller
performance. The OptiSound Control continuously monitors the characteristics of the
compressor-discharge gas and optimizes the diffuser spacing to minimize gas-flow dis-
ruptions from the impeller. It can also reduce part-load sound levels below the full-load
level.
We utilize a permanent-magnet motor and active magnetic-bearing technology to elimi-
nate driveline sound.
Introduction (Cont'd)
The OptiSound Control
continuously monitors
the characteristics of
the compressor
discharge gas
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