TopDrive

Electro-thermal actuators in the operating mode normally closed for heating circuit manifolds and radiator valves.

Description

TopDrive actuators in the new, great design used in conjunction with room thermostats, time switches and building automation systems offer an efficient means of controlling temperatures in heating and cooling systems to suit individual requirements.
The normally closed (NC) operating mode, the easily and quickly fitted bayonet connection and the possibi­lity of overhead installation (360° in­stallation) ensure that the TopDrive actuators can be used for versatile applications in heating, ventilation, air conditioning and sanitary systems.
Homes, offices, schools, hotels, etc. are typical examples of properties with high saving potential, since heating and cooling systems are consistently used only as and when required.
Internal visual indication of valve position is standard and serves as a functional control feature during installation, commissioning and monitoring.

Advantages

  • Protection against leaking valves
  • Protection rating actuator IP 44, CE
  • 360° installation
  • Compatible to most valve bodies
  • Valve position visually indicated and tangible
  • Easy installation through bayonet connector

Functions

An electric resistance heats an expansion element. Any deviation from the nominal room temperature value triggers the actuator to transmit an appropriate stroke movement to the valve.
The thermostat and actuator operate according to the «ON  / OFF» principle. The variable, rhythmic opening and closing, depending on the heat demand, also produces an almost continuous control characteristic.
The valve is normally closed.

Technical Data

General

  • Type: Normally closed (NC)
  • Ambient temperature: 0 ... 60°C
  • Opening/closing time: Approx. 3 Min.
  • Hub: 4 mm
  • Nominal closing force: 100 N ± 7%
  • Protection type: IP 44
  • Electrical protection class II

Electric connection data

  • Operating voltage (AC or DC): 24 V or 230 V
  • Permissible voltage deviation: ±10%
  • Operating efficiency: 1.8 W
  • Inrush current:
    • 24 V: 0.2 A for max. 1 min
    • 230 V: 0.6 A for max. 100 ms
  • Recommended fuse protection: 0,35 A time delay, according to DIN 41662
  • Connecting cable length: 1 m
  • Connection cable: 2 × 0.75 mm2, PVC

Building categories

For installations in the heating and cooling area:

  • Apartment blocks, housing estates, multiple dwelling units
  • Residential care facilities, hospitals
  • Administration and service buildings
  • Hotels and restaurants, industrial kitchens
  • School buildings and sports facilities
  • Commercial and industrial buildings

Certificates

  • CE conformity symbol
  • The technical data conforms with the respective EN standards

Type Overview

TopDrive NC 230 V

Electro-thermal actuator, function NC (Normally Closed)
Order no. to fit valve/manifold from Fixture
257.2055.000 TacoSys / Heimeier / Strawa / Empur Messing / Oventrop / Delphistherm / Emmeti / Schlösser / Beulco / AC-FIX / Stramax / Roth / IVR M30 x 1,5
257.2058.000 Herz (RV 57) M28 x 1,5
257.2062.000 MNG / Cazzaniga / SBK / Empur-Edelstahl / SKV-Ventil frontal M30 x 1,5
257.2064.000 Giacomini Adapter
257.2080.000 Viega M30 x 1,5

TopDrive NC 24 V

Electro-thermal actuator, function NC (Normally Closed)
Order no. to fit valve/manifold from Fixture
257.1055.000 TacoSys / Heimeier / Strawa / Empur Messing / Oventrop / Delphistherm / Emmeti / Schlösser / Beulco / AC-FIX / Stramax / Roth / IVR M30 x 1,5
257.1058.000 Herz (RV 57) M28 x 1,5
257.1062.000 MNG / Cazzaniga / SBK / Empur-Edelstahl / SKV-Ventil frontal M30 x 1,5
257.1064.000 Giacomini Adapter
257.1080.000 Viega M30 x 1,5