MT4/MT8 Small linear thermoelectric Actuators
EN0H-0490GE23 R0421
Actuators
MT4/MT8Small 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).
APPROVALS
- CE
- UKCA
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
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Operating temperatures |
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Max. medium temperature: |
120 °C |
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Specifications |
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Maximum stroke: |
MT4: 4 mm MT8: 8 mm |
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Power supply: |
MTx-024: 24 V AC/DC ± 20 % MTx-230: 230 V AC +10 % … -15 % |
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Stem force: |
90 N |
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Open/closing time: |
dependent on ambient temperature (see section “Electrical specifications”) |
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Protection standard: |
IP44 in all mounting positions |
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Cable length: |
1 m, other cable lengths upon request |
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Cable wires: |
MTx-xxx: 2 x 0.5 mm2MTx-xxxS: 4 x 0.35 mm2 |
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Max. permissible auxiliaryswitch current: |
MTx-xxxS: 5 (3) A |
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End position: |
MT4: 14.0 mmMT8: 18.0 mm |
METHOD OF OPERATION
When the operating current is applied, a PTC resistor heats up a wax element. After a delay, this wax element expands, causing stroke movement.
TRANSPORTATION AND STORAGE
Keep parts in their original packaging and unpack them shortly before use.The following parameters apply during transportation and storage:
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Parameter |
Value |
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Environment: |
clean, dry and dust free |
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Min. ambient temperature: |
20 °C |
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Max. ambient temperature: |
50 °C |
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Max. ambient relative humidity: |
95 % * |
INSTALLATION GUIDELINESMounting and dismounting
Position Indicator
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.
Wiring
Opening and Closing Time
Note: Connection leads must not touch piping (heat transfer).
Note: Opening and closing times depend upon ambient temperature and model.
Product Specification Sheet · EN0H-0490GE23 R0421 · Subject to change
MT4/MT8 – Small linear thermoelectric Actuators
TECHNICAL CHARACTERISTICSElectrical specifications
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Initial current* |
Permanent current* |
Power consumption* |
Ø Runtime for full nominal valve stroke* |
OS.-No. |
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(valve stroke: 2.5 mm) MT4 |
(valve stroke: 6.5 mm) MT8 |
||||
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~0.2 A** |
< 0.1 A |
< 2 VA |
4.0 min |
6.0 min |
MTx-024-xx, MTx-024S-xx |
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~0.4 A** |
< 0.01 A |
< 2 VA |
4.0 min |
6.5 min |
MTx-230-xx, MTx-230S-xx |
* 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
OS.-No.MTx-024-xx, MTx-024S-xx MTx-230-xx, MTx-230S-xx
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 function can vary depending upon the individual type of valve.
Product Specification Sheet
- EN0H-0490GE23 R0421
- Subject to change
MT4/MT8 – Small linear thermoelectric Actuators
DIMENSIONS
Overview
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Parameter |
MT4-xxx |
MT8-xxx |
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Dimensions: |
H |
59 |
67 |
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L |
45 |
45 |
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W |
42 |
42 |
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|
X |
6 |
6 |
Note: All dimensions in mm unless stated otherwise.
MT4-xxx 59 45 42 6
MT8-xxx 67 45 42 6
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
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Action* |
Additional features |
Voltage |
Max. stroke |
OS.-No. |
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Normally closed |
24 V AC/DC |
4 mm |
MT4-024-NC |
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Normally open |
MT4-024-NO |
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Normally closed |
2.5 m cable length |
MT4-024-NC-2.5M |
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Normally open |
2.5 m cable length |
MT4-024-NO-2.5M |
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Normally closed |
with auxiliary switch |
MT4-024S-NC |
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Normally open |
with auxiliary switch |
MT4-024S-NO |
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Normally closed |
230 V AC/DC |
MT4-230-NC |
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Normally open |
MT4-230-NO |
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Normally closed |
2.5 m cable length |
MT4-230-NC-2.5M |
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Normally open |
2.5 m cable length |
MT4-230-NO-2.5M |
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Normally closed |
with auxiliary switch |
MT4-230S-NC |
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Normally open |
with auxiliary switch |
MT4-230S-NO |
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Normally closed |
24 V AC/DC |
8 mm |
MT8-024-NC |
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Normally open |
MT8-024-NO |
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Normally closed |
2.5 m cable length |
MT8-024-NC-2.5M |
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Normally open |
2.5 m cable length |
MT8-024-NO-2.5M |
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Normally closed |
with auxiliary switch |
MT8-024S-NC |
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Normally open |
with auxiliary switch |
MT8-024S-NO |
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Normally closed |
230 V AC/DC |
MT8-230-NC |
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Normally open |
MT8-230-NO |
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Normally closed |
2.5 m cable length |
MT8-230-NC-2.5M |
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Normally open |
2.5 m cable length |
MT8-230-NO-2.5M |
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Normally closed |
with auxiliary switch |
MT8-230S-NC |
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Normally open |
with auxiliary switch |
MT8-230S-NO |
*Without power, in combination with standard 2-way valve; “normally closed” = stem extends, “normally open” = stem retracts
Accessories
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Description |
Dimension |
Part No. |
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MT-CLIP |
Mounting Clip |
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10 units |
MT-CLIP |
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MT-ADAPT-HW |
Mounting adapter |
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10 units |
M30 x 1.5 |
MT-ADAPT-HW |
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MT-ADAPT-HP |
Mounting adapter for Herz/Polytherm valves |
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10 units |
MT-ADAPT-HP |
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MT-CABLE |
Cable (only for actuators without auxiliary switch) |
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Suitable for MT4-024/-230 and MT8-024/-230, 10 units |
MT-CABLE-1.5M |
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MT-CABLE-2.5M |
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MT-CABLE-5M |
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MT-CABLE-10M |
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EVA1-DANFOSS |
Danfoss adapter set |
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RA/RAV/RAVL, 10 units |
M30 x 1.5 |
EVA1-DANFOSS |
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HCA1VEL |
Mounting adapter for Velta compact manifold |
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HCA1VEL |
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R453HY002 |
Mounting adapter for Giacomini manifold |
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R453HY002 |
For more information homecomfort.resideo.com/europe
Ademco 1 GmbH Hardhofweg 40 74821 MOSBACH GERMANY Phone: +49 6261 810 Fax: +49 6261 81309
Manufactured for and on behalf of the Pittway Sàrl, La Pièce 4, 1180 Rolle, Switzerland by its Authorised Representative Ademco 1 GmbHEN0H-0490GE25 R0421Subject to change© 2021 Pittway Sàrl. All rights reserved. This document contains proprietary information of Pittway Sàrl and its affiliated companies and is protected by copyright and other international laws. Reproduction or improper use without specific written authorisation of Pittway Sàrl is strictly forbidden. The Honeywell Home trademark is used under license from Honeywell International Inc.
References
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