MT4/MT8
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MT4/MT8 Small linear thermoelectric Actuators APPLICATION Small linear actuators are used in room and zone applications for time-controlled two-point and pulse-width modulated (PWM*) regulation of heating and cooling systems such as fan coil units, radiators, floor heating systems, chilled ceilings, and convectors. • Fit on standard M30 x 1.5 heating/cooling valves, thermostatic radiator valves, and valve inserts for manifolds and compact radiators Fit to standard closing dimensions (11.5 mm ± 0.3 mm) Special valve adapters on request *Recommended controllers: Excel 10 and Excel 12 controllers (use with other, non-Honeywell Home controllers may adversely influence PWM-operation). SPECIAL FEATURES • No mounting tools required (easily mounted using valve adapter) Water-protected housing design in all mounting positions Pluggable cable for easy installation and servicing Auxiliary switch models for driving pumps or fans Normally-open and normally-closed models Compact design allows installation in limited space Visual indicator showing valve position and type of action (NO or NC) Noiseless operation Reliable long-term operation Overload protection (4 kV) for 230 V models TECHNICAL DATA Operating temperatures Max. medium 120 °C temperature: Specifications Maximum stroke: MT4: 4 mm MT8: 8 mm Power supply: MTx-024: 24 V AC/DC ± 20 % MTx-230: 230 V AC +10 % ... -15 % Stem force: 90 N Open/closing time: dependent on ambient temperature (see section "Electrical specifications") Protection standard: IP44 in all mounting positions Cable length: 1 m, other cable lengths upon request Cable wires: MTx-xxx: 2 x 0.5 mm2 MTx-xxxS: 4 x 0.35 mm2 Max. permissible MTx-xxxS: 5 (3) A auxiliary switch current: End position: MT4: 14.0 mm MT8: 18.0 mm Product Specification Sheet • EN0H-0490G

MT4/MT8 - Small linear thermoelectric Actuators Position Indicator When the operating current is applied, a PTC resistor heats up a wax element. After a delay, this wax element expands, causing stroke movement. The position indicator (the red indicator behind the window on the face of the actuator) shows the model's type of action (NO or NC) as well as the current stroke position. TRANSPORTATION AND STORAGE Keep parts in their original packaging and unpack them shortly before use. The following parameters apply during transportation and storage: Parameter Environment: Min. ambient...

MT4/MT8 - Small linear thermoelectric Actuators TECHNICAL CHARACTERISTICS Electrical specifications Ø Runtime for full nominal valve stroke* (valve stroke: 2.5 mm) (valve stroke: 6.5 mm) MT4 MT8 Initial current* Permanent current* Power consumption* * All values at nominal voltage 24 V AC/DC, 230 V AC, 50 Hz. **Average during first 500 m sec. Valve Action with "Typical" Valves Valve Action with VSxx Valves Normally open: 2-way valve, A-B open without power; Normally closed: 2-way valve, A-B shut without power; Note: This figure is a schematic diagram showing typical valve action. Actual...

MT4/MT8 - Small linear thermoelectric Actuators DIMENSIONS Overview Parameter Dimensions: All dimensions in mm unless stated otherwise. ORDERING INFORMATION The following tables contain all the information you need to make an order of an item of your choice. When ordering, please always state the type, the ordering or the part number. Options Action* Normally closed Normally open Normally closed Normally open Normally closed Normally open Normally closed Normally open Normally closed Normally open Normally closed Normally open Normally closed Normally open Normally closed Normally open...

MT4/MT8 - Small linear thermoelectric Actuators Accessories Description MT-CLIP Dimension Part No. Mounting Clip 10 units MT-ADAPT-HW Mounting adapter 10 units MT-ADAPT-HP MT-CABLE Mounting adapter for Herz/Polytherm valves 10 units Cable (only for actuators without auxiliary switch) Suitable for MT4-024/-230 and MT8-024/-230, 10 units EVA1-DANFOSS Danfoss adapter set RA/RAV/RAVL, 10 units Mounting adapter for Velta compact manifold HCA1VEL Mounting adapter for Giacomini manifold R453HY002 For more information homecomfort.resideo.com/europe Manufactured for and on behalf of the Pittway...