Honeywell evohome Thermal actuator, passive (NC) MT4-230-NC Data Sheet
Product codes
MT4-230-NC
® U.S. Registered Trademark
EN0B-0490GE51 R1006
Copyright © 2006 Honeywell Inc. • All rights reserved
MT4-024/MT4-230
MT8-024/MT8-230
SMALL LINEAR THERMOELECTRIC ACTUATORS
Smart-T
PRODUCT DATA
APPLICATION
Smart-T 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.
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.
manifolds and compact radiators.
• Special valve adapters on request.
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
• Low power consumption models
• Normally-open and normally-closed models
• Compact design allows installation in limited space
• Visual indicator showing valve position and type of
• Auxiliary switch models for driving pumps or fans
• Low power consumption models
• 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
• Reliable long-term operation
• Overload protection (4 kV) for 230 V models
SPECIFICATIONS
Max. stroke
MT4: 4 mm
MT8: 8 mm
MT8: 8 mm
Power supply
MTx-024: 24 Vac/dc ± 20%
MTx-230: 230 Vac +10% ... -15%
MTx-230: 230 Vac +10% ... -15%
Stem force
90 N
Opening/closing time
dependent on ambient tem-
perature (see Table 3)
perature (see Table 3)
Ambient temperature
max. 50°C
Electrical
specifications
specifications
See Table 3 on page 3.
Protection standard
IP44 in all mounting positions
Cable length
1 m, other cable lengths upon
request
request
Cable wires
MTx-xxx: 2 x 0.5 mm
2
MTx-xxxS: 4 x 0.35 mm
2
Max. permissible
auxiliary switch
current
auxiliary switch
current
MTx-xxxS: 5 (3) A
Medium temperature
max. 120 °C