WDE
32
EN/36B/08.2018 © STULZ SpA – all rights reserved
RFS
Range
50 ÷ 500 Pa
Pressure differential
20 Pa ± 15%
P1 : Connection of the high pressure
P2 : Connection of the low pressure
Adjustment:
Using a screwdriver, you can adjust the desired differential
pressure, over which the filter control triggers, at the central
screw.
Technical features:
Power supply: 1.5 (0.4) A; 250 Vac - 0.1 A; 24 Vac
Humidity:
0...50% rel. h., non condensing
Operating temperature: -20/+85°C
Max. pressure: 50 mbar
Contacts:
Micro switch with contacts of AgCdO (on/off)
Housing:
Plastic
Protection:
IP54
Protection class:
I
Diaphragm: Silicone
Pressure connection: Ø 6 tube
Wiring:
Contact 3-1 opens, when the differential pressure increases to the
adjusted value. Simultaneously contact 3-2 closes, the signal is
transmitted by this contact.
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 electric box 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, state of the
air conditioner and alarms. Ordering accessory ACTKPDC1010H, the keypad is supplied in wall-
mounted version (not inside the unit), housed 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. Only one unit at a time can be displayed, selecting it via the keypad itself.
The C2020 controller can also be connected to a remote monitoring / supervision system with a
RS485 serial line and ordering the necessary serial interface ACTSERC1010 (cable not supplied).
