Technical data

/08.2011/18/9
EN
4.3 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.
4.2 Intended use
This A/C unit is used to control room temperature and air humidity. The A/C unit is designed for indoor in-
stallation. Any use beyond this is not deemed to be use as intended. STULZ is not liable for any damage
resulting from such misuse. The operator alone bears the risk.
Electrical box
Downflow unit Upflow unit
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 (dehumidifying circuit). A humidification
can be obtained by using the optional humidifier.
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.