Stulz Tel-Air-2 Series, Operating Instructions Manual

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STANDARD COMPONENTS with ELECTRONIC CONTROL
C2020 I/O CONTROLLER
This microprocessor-based electronic board is equipped with a set of terminals which are
necessary to connect the board to the controlled devices (e.g. valves, compressors, fans).
Software with working logic and parameter settings are written in the EEPROM so that they
remain permanently stored even in case of power failure.
C2020 controller is housed inside the electrical panel and can control only one air conditioner.
C2020 controllers on different units (up to 5) can be connected in a LAN for the facility of data
transfer (e.g. for sequencing).
A keypad can be connected to C2020 to display information about working conditions, status of
the air conditioner and eventual alarms. If option code KPDC1010BI is ordered, the keypad of
Tel-Air-2 units is installed on-board and accessible from the front side of the unit without
removing any panels. Ordering accessory ACTKPDC1010, it is possible to choose also the wall-
mounted version (not inside the unit), provided in a separate plastic box. When two or more units
are linked in a sequencing LAN, with only one keypad connected to the master controller it is
possible to display data of all units, selecting it via the keypad itself.
C2020 controller can be optionally linked to a supervisory/telemonitoring system via serial line,
providing it with the necessary options.
For controller input / output assignation, please refer to the electrical diagram on
part 2 manual, specific for each unit.