s 4 830
ACVATIX™
Electromotoric actuator SUA21/1
For zone valves
AC 230 V operating voltage, 2-position control signal
Positioning force 150 N
Direct mounting with M30 x 1.5 union nut (no tools required)
3-wire connection with integral 0.8 m connecting cable
LED indicates actuator motion
Parallel connection of multiple actuators are possible
Use
For Siemens zone valves V..I46..
Primarily in heating, ventilation and air conditioning systems for water-based
control of hot water and cold water.
Heating and cooling zones
Control valves for fan coil units
Zone valve for floor heating via heating distributors (manifolds)
Chilled ceiling units
On/off control for domestic hot water boilers
Shut off valve for wall mounted boiler applications
CB1N4830_02en
2015-08-11 Building Technologies
Type summary
1)
Type Stock No. Operating Positioning time Control signal Cable
voltage open close length
SUA21/1 S55176-A102 AC 230 V 10 s at 50 Hz 2-position, SPST 0.8 m
4832Z01
1)
SPST = single pole, single throw
Ordering
When ordering please specify the quantity, product name and type code.
Example: Type Stock No. Description Quantity
SUA21/1 S55176-A102 Electromotoric actuator 2
Delivery The valves and actuators are supplied in separate packages. The position of the
actuator stem is retracted when supplied for better valve assembly.
Equipment combinations
Zone valves kvs PN pmax DN Data
Type Description 3
[m /h] class [KPa] sheet
VVI46.15.. 2-port valve, internal thread Rp 300 15
VVI46.20.. 2-port valve, internal thread Rp 300 20
VVI46.25.. 2-port valve, internal thread Rp 250 25
2…5 PN 16 N4842
VXI46.15.. 3-port valve, internal thread Rp 300 15
VXI46.20.. 3-port valve, internal thread Rp 300 20
VXI46.25.. 3-port valve, internal thread Rp 250 25
kvs Nominal flow rate of cold water (5…30 °C) through the fully open valve (H 100) by a differential
pressure of 100 kPa (1 bar)
pmax Maximum permissible differential pressure across the valve's control path, valid for the entire
actuating range of the motorized valve
Room thermostats Type code Room thermostat compatible to SUA21/1
RAB.. RAB10; RAB10.1; RAB20; RAB20.1; RAB30; RAB30.1; RAB40.1
RCC.. RCC10; RCC20; RCC30
RDF.. RDF10; RDF10.1; RDF20; RDF30; RDF110..; RDF210..; RDF300..; RDF400..
Technical design
The actuator opens the valve electrically. It incorporates an electric motor and gear
mechanism. The maximum stroke is limited mechanically (valve seat). No power
consumption in end position. The actuator is connected with a 0.8 m cable, which
is an integral part of it. The actuator can open or close the valve via controller
(thermostat) output signal.
2-position SPST The actuator requires an on/off controller.
control signal Voltage at Y: Stem retracts Valve opens
No voltage at Y: Stem extends Valve closes
Caution Do not operate the SUA21/1 actuators in a 3-position control mode!
LED operating mode display, e.g. SUA21/1:
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L
L
Y BK 6
Voltage on Y: LED is lit
L BR 3
N N BL 4
Y Y No voltage on Y: LED is off at end
4830Z02
position
The LED is lit when the actuator stem retracts and the valve opens.
Engineering notes
The admissible temperatures (see «Technical data») must be observed.
Electrical installation Operate the actuator only with alternating current (see «Technical data»).
Installation must be carried out in compliance with local installation regulations.
The cable should not be twisted.
Magnets can damage the actuator.
A means of isolation from the power supply must be provided, for example: con-
necting a circuit breaker or switch fuse upstream of the control unit.
Caution Phase cut and pulse-duration-modulated (PDM) signals are not suitable.
Regulations and requirements to ensure the safety of people and property
must be observed at all times!
Mounting notes
The mounting instructions 74 319 0718 0 are enclosed in the packaging.
Valve and actuator are easy to assemble on site before commissioning:
Remove protective cover from the valve body.
Put the actuator in position and tighten the union nut manually.
Warning Do not use pipe wrenches, spanners or similar tools.
Orientation
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Commissioning notes
Check wiring.
Check the functions of the actuator.
Maintenance notes
SUA21/1 actuators require no maintenance.
Repair Faulty actuators cannot be repaired and must be replaced by complete units.
The actuator can be replaced without removing the valve.
Warning The operating voltage must be switched off during this process
Disposal The device contains electrical and electronic components and must not be dis-
posed of as domestic waste. This applies in particular to the PCB.
Legislation may demand special handling of certain components, or it may be
sensible from an ecological point of view.
Current local legislation must be observed.
Warranty
The technical data given for these applications is valid only when the valves are
used with the actuators described under «Equipment combinations».
The use of type SUA21/1 actuators with any third-party valves invalidates any
warranty offered by Siemens Switzerland Ltd.
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Technical data
SUA21/1
Power supply Operating voltage AC 230 V
Voltage tolerance ±15%
Frequency 50/60 Hz
Power consumption 6 VA at 50 Hz (when running only)
Primary fuse external
Signal inputs Control signal 2-position (SPST) 1)
2)
Parallel operation permitted
Operating data Position with de-energized contact Y see «Technical design»
Positioning time (open/close) 10 s at 50 Hz
8.3 s at 60 Hz
Positioning force 150 N
Nominal stroke 2.5 mm
Permissible temperature of medium
in the connected valve 1…110 °C
Electrical connection Connecting cable (integral) 3-core, 0.8 m
3 x 0.75 mm2 (18 AWG)
Mounting Fixing on valve plastic union nut M30 x 1.5
Orientation upright to 85° horizontal; do not suspend
Norms and standards CE-conformity
EMC-directive 2004/108/EC
Emission/Immunity EN 60730-1:2000 +A16:2007
Low voltage directive 2006/95/EC
Electrical safety EN 60730-1:2000 + Amendments
EN 60730-2-14:1997 + Amendments
Product standards for automatic elec-
tric controls EN 60730-2-14:[1997]
Housing protection degree IP40
Protection class II to EN 60730-1
Environmental compatibility ISO 9001 (Quality)
RL 2002/95/EG (RoHS)
Dimensions / Weight Dimensions Refer to «Dimensions»
Weight 320 g
Materials Cover, base PBT
Housing colors Cover, base plastic / light gray, RAL 7035
Union nut Silver-grey, RAL 7001
1)
Phase cut and pulse-duration-modulated (PDM) signals are not suitable, 3 position operation not
permissible, SPST = Single Pole, Single Throw
2)
Consider controller’s output power
General Operation Transport Storage
ambient conditions EN 60721-3-3 EN 60721-3-2 EN 60721-3-1
Environmental conditions Class 3K3 Class 2K3 Class 1K3
Temperature 1…50 °C -25…70 °C -5…50 °C
Humidity 5…85% r. h. <95% r. h. 5…95% r. h.
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Connecting cable
SUA21/1 SPST black
6 Y control signal OPEN (AC 230 V)
brown
3 L phase (AC 230 V)
blue
4832Z04en 4 N neutral
Connection diagram
SUA21/1
L external
L N1
N1 = room thermostat
Y1 = actuator SUA21/1
Y / Y11 N Y/Y11 = control signal OPEN
L = phase
N = neutral
L Y Y1
N
4830A01
N
Dimensions
95 mm 56 mm
70 mm
77 mm
4830M01
M30 x 1.5
Revision numbers
Product number Valid from rev. no.
SUA21/1 ..C
6/6 2011 Siemens Switzerland Ltd. Subject to change
Siemens Electromotoric actuator CB1N4830_02en
Building Technologies 2015-08-11
