YORK ® YC-R Series
Close Control Air Conditioners
A complete range from 23.9 kW up to 34.4 kW
Applications
“R” Series YORK air conditioners consist of a family of units specially
designed and constructed to have the same dimensions as the racks.
In the design of air conditioning plant for large Data Centres, the
reduction of energy consumption is of ever increasing importance.
For this reason the following concepts have become consolidated
international standard practice:
• The racks containing the servers are more often positioned according
to the “hot corridor aisle” and “cold corridor/aisle” layout.
• The working air temperatures are now allowed to go up to 30-
35°C in the hot corridor and 20-25°C in the cold one, with very low
humidity (never above 30%). Consequently, also the water
temperature is allowed to rise up to 20-28°C, using the Free Cooling
system to the best effect.
• Server capacities keep going up while their dimensions keep going
down. This means that more servers can be installed in a rack so that
some of these racks, remaining empty, can be removed. At the same
time the heat dissipated rises and more capacity is required from the
air conditioners.
• The servers work day and night albeit with a night time reduction
of their capacity. It is therefore essential for the air conditioning
installation to have an efficient modulating cooling capacity control
and to be designed for minimum energy consumption and minimum
environmental impact.
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