first page

MODULATING ELECTRONIC CONTROLLERS FOR UNDERFLOOR PANELS

RTA 72

NOW OBSOLETE

 click on picture to enlarge

 Path - First Page - Products - Thermostats and ambient controllers - RTA 72

APPLICATION

Room temperature regulation, for heating systems (single dwellings or zoned) by modulating PI control of a valve operated by a reversible actuator. Room temperature is monitored by an NTC 10 kΩ sensing element inside the controller or by a remote room detector.

Possibility of increasing stability of room temperature by a detector on flow pipe.

Detectors recommended for all models:

  • 1 plant flow detector.

Essential detectors for /D models:

  • 1 room detector.

FEATURES

  • Power supply: 230 V ~.

  • Consumption: 4 VA.

  • Protection: IP 20.

  • Voltage-free output contacts: rating: 250 V ~, 5 (3) A.

  • Control of actuators with run times 60 ... 120 seconds.

  • Setting range: 5 ... 30 °C.

  • PI control action.

  • Proportional band: ± 1 °C.

  • Possibility of limiting setting range by means of pins supplied on request.

 

Code  

Description 

Data sheet
RTA 725   Controller with 24-hour timeswitch and incorporating room detector. B 330
RTA 725/D   Controller with 7-day timeswitch and incorporating room detector.
RTA 726   Controller with 24-hour timeswitch for remote room detector.
RTA 726/D   Controller with 7-day timeswitch for remote room detector.

DETECTORS & ACCESSORIES

Code   Description Setting range

Sensing element

 Data sheet

for all models:

SIH 010  

Plant flow immersion temperature detector.

 0 ... 99 °C NTC 10 kΩ N 140

for /D models:

SAB 010  

Room temperature detector.

 0 ... 40 °C NTC 10 kΩ N 111
SAB 020  

Room detector for large spaces (2 in parallel).

 0 ... 40 °C NTC 20 kΩ