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© STULZ GmbH – all rights reserved EN/06.2017/G18D
cyberair 3PrO cw2 Original instructiOns
3.2 Intended use
This A/C unit serves to control room temperature and air humidity within the application limits stated in
chapter 4.1. The A/C unit is designed for indoor installation. Any use beyond this is not deemed to be
use as intended.
3.3 Function of the A/C unit
The A/C unit is exclusively operated by the controller in the front panel and the main switch in the electric box.
To adapt the airflow to the needs of the system the fan speed can be adjusted gradually at the controller by
means of a 0-10V signal. Minimum speed corresponds to 4V.
At the air inlet a temperature and hunidity sensor is installed. The setpoints can be set at the controller.
To control the supply air temperature the controller adjusts the 3 way valve, which is part of the chilled water
circuit and controls the amount of chilled water which flows through the chilled water coil. For optional heating
two variants are available: electrical heating and hot water reheat
To achieve a dehumidification, the fan speed is reduced.
A humidification can be obtained by using the optional humidifier.
Electrical box
Downflow unit
Upflow unit
The A/C unit control is effected by the
on board I/O controller. The operational
conception is designed such as to allow
to control up to 19 units from one unit.
These units can be installed separately
with a maximum control line length of
1000 m.
