Electronic expansion valve Control Panel
Electronic expansion valves are one of the most recent pieces of
equipment that enable us to improve the energy efficiency at partial
loads of direct expansion machines. These valves are installed at
the inlet of the evaporator, substituting the traditional thermostatic
expansion ones: this allows more precise control of the quantity of
refrigerant entering the evaporator, and guarantees good capacity
regulation, typically between 100% and 50%. Electronic expansion
valves also allows control of the amount of overheated gas at the
outlet of the evaporator, thus allowing a significant reduction of the
condensation pressure during winter or night-time operation whilst
maintaining the evaporation pressure unchanged. Adoption of the
electronic expansion valve (optional) guarantees a significant increase
of the EER values. All the units are equipped with a complete control panel with main
isolator switch. Magnetothermic switches, contactors, and all necessary
protection is provided, as required by legal codes and standards.
The control panel of the units equipped with compressors (“A” as third
letter of the identification code) has as standard a phase sequencer,
which prevents the compressor from getting damaged when counter
running. Also, the control panel has 4 configurable input and output for
remote signalling, as well as two terminals for starting up and stopping
the unit from remote position.
The condenser fan speed controller (accessory) is installed in the unit
and controlled with a 0-10V signal from the microprocessor. All the
control parameter are managed by the microprocessor.
The controller is valid for all the AC 230V motors.
One or two completely independent
compressors
EC fans control and power lines available as alternatives.
Models with “1” as the last digit of the unit model number have a single
circuit and a single compressor. Those with “2” as the last digit on the
other hand have two completely independent refrigerant circuits and
two compressors.
The circuits are fitted with all the safety and regulation devices
necessary for efficient and reliable operation.
The evaporator coil can be single or double circuit depending on the
number of compressors.
Hydraulic circuit
Air conditioners with chilled water coil, YC-OPU and YC-UPU,
include a finned coil and a three-way motorised valve for water flow
regulation. The hydraulic circuit is provided with copper tubes. The
coils are optimised for both water with a temperature of 7/12 and for
higher ones such as 15/20.
Modulating controller display and keypad
Modulating regulation of the cooling capacity Large surface filters
If a very precise regulation and high response speed are required, a
modulating valve is installed as standard. This valve is recommended in
case of functionment with a lot of fresh air. The units are equipped with self-extinguishing media class G4 filters.
The filters are installed inclined before the cooling coil in order to offer
a larger surface and allow lower air crossing speeds, with lower energy
consumption.
M5 or F7 filters ON COILS available as accessories.
Design suitable to civil environments
YORK ® YC-P Series air conditioners have a pleasant and functional
design, suitable for installation in civil environments. Their structure
consists of aluminium profiles and closing panels hinged on them. Both
panels and profiles are epossidic painting RAL 7024.
Two versions are available for up flow units (YC-OP): front grille & top
air discharge (standard), or blind front panel, suction from the bottom
and top discharge (optional).
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