Upflow supply (OPA-OPU models)
Standard version with front air intake and
upflow air delivery.
Front air intake and front air outlet delivery with
distribution plenum with adjustable grilles.
Bottom air intake with raised floor support,
blind front panel and upflow air delivery.
Special versions
“Water to air free cooling”: using renewable
energy sources ‘Two Sources’ option utilising excess energy
from building HVAC systems
YC-OPA…/FC, YC-UPA…/FC air conditioners are equipped with a
“Free cooling” system consisting of an additional chilled-water cooling
coil integrated in the aluminium fins of the unit’s direct expansion
one, with a three-way modulating valve controlled by the controller.
As long as the outside conditions allow the water to respond totally
or partially to the cooling request, the controller cuts out or minimises
the compressors’ intervention, so reducing substantially the energy
consumption. This system consists of the same chilled-water cooling coil as the
“Free cooling”, but fed by the building water chiller. A built in frigorific
circuit enters in operation in case of lack of chilled water. The result is
the maximum security or a remarkable reduction of both consumption
and running costs. This system can also use the direct-expansion coil
circuit as primary cooling source and, in case of an emergency, the
chilled-water coil connected with the tap water network.
The “Two Sources” version is available for units with direct expansion
circuit YC-OPA…./TS, YC-UPA…./TS as well as units with built in
water cooled condenser (accessory) and with double chilled water coil
YC-OPU…/TS, YC-UPU…/TS: one for district water and the other
for tap water or water from a chiller (emergency).
The water cooled condensers of the frigorific circuit are equipped with
a pressostatic system for the regulation of the condensing pressure
(flooding valves).
The pumps and the expansion tank are not included in Johnson
Control’s supply. The system widely uses the outdoor air—a renewable
energy source—in lieu of or in addition to the mechanical cooling.
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