Application

The electrothermic actuators series 22C, are used for ON/OFF control of the heat emission of terminal control units in heating and air conditioning systems, through an electric signal transmitted by a room or timing thermostat.

The use of electrothermic actuators instead of pure thermostatic actuators allows remote control. The room thermostat, timing thermostat, or control component controlling the system can be situated in the most suitable point of each room to provide regulation and wired back to the electrothermic control head.

Operation

Operation of the thermoelectric actuators series 22C depends on a wax thermostatic element mounted in the actuators and activated by a PTC thermistor against a signal sent by a room thermostat (or timing thermostat).
When the thermostatic element expands, it supplies the thrust required for automatic movement of the valve. The 4-wire version is provided with an auxiliary contact for additional commands (metering, control of pump, fan or other equipment).
The actuator has a mechanical/visual zone that allows for the status of actuator to be seen by virtue of a transparent zone on the actuator cover. Red = plug valve closed - Black = plug valve open.

22C

Electrothermic actuator with wax thermostat element and auxiliary microswitch (only for versions NC4 and NA4).
Cable Ø = 7,2 mm.

22C series available in the following versions :

• • NA (Normally open)
• • NC (Normally closed)
• 2-wire (Standard)
• 4-wire (With auxiliary contact)
• New compact design.
• Availability to check status of actuator (On/off) by transparent window on the cover
• CE Marked in accordance with the following standards :
• EEC EMC (CEI-EN 55104/95 ; CEI-EN55014/93), EMC directive EN 60730-1; EN 60730-2-14, low voltage directive
• ENEC approved.