1

Design

l indab | we simplify construction

We reserve the right to make changes

Actuators Actuator 24V

Technical information, Actuator 24 V

The actuator 24 V is a thermoelectric actuator for open-ing and closing valves on waterborne heating and cool-ing systems.Features, as protection in case of leaky valves, compact and modern casing, versions in normally closed and nor-mally open, valve adapter concept and an enhanced life time makes the actuator competitive and flexible.The actuator 24 V is controlled by a 24 V room thermo-stat with two-point output or pulse-width modulation.

Features

DesignCompact size, small dimensionsAvailable in normally closed (NC) or normally open (NO)Patented 100% protection against leaky valvesAll around function indicatorMaintenance-freeNoiselessHigh functional safety and long expected service lifeEnhanced over-voltage protectionLow power consumption360° installation positionSnap-on installationValve-adapter conceptAdaptation check on valve

General information

The actuator serves for optimum control of valves on heat-ing and cooling circuits. Control is done from a room ther-mostat with two-point output or pulse-width modulation.

Scope of Supply (standard)1x actuator (Version: normally closed)1x cable 1 meter1x installation manual with ten languages

Alternative Version:Version normally open

Type:A 4004: Version 24 V – normally closed A 4104: Version 24 V – normally open

Optional available extensions: First-Open function (only for normally closed)Non halogen connection cableOther cable length are available

Accessories:A valve adapter suiting your application can be enclosed in your order.

Functions

In general:The actuator mechanism of the actuator uses a PTC re-sistor-heated elastic element and a compression spring. The wax element is heated by applying the operating voltage and moves the integrated piston. The force gen-erated by the movement is transferred on to the piston lifter and thus opens and closes the valve.

Standard version:Normally Closed (valve closed) The valve is opened steadily by the piston motion upon switching on the operating voltage and after expiry of the dead time. The wax element cools down after the oper-ating voltage is cut and after expiry of the hold time, the valve is closed evenly by the closing force of the com-pression spring.The closing force of the compression spring is matched to the closing force of commercially available valves and keeps the valve normally closed.

Valve-AdapterA valve-adapter concept guarantees a perfect match of the actuator to almost any valve bottom or heating circuit distributor available on the market. Simply snap-on the actuator to the pre-installed valve adapter.

Function indicator:The function indicator of the actuator (all-round indicator) allows identifying the operating condition (valve open or closed) at a glance.

Extended version:First-Open function (for NC only)In its delivery condition, the actuator is kept open when de-energised due to the First-Open function (filling). This enables heating or cooling operation during the carcass construction phase even when the electric wiring is not yet complete. During the later electrical start-up, the First-Open function is unlocked by applying the operat-ing voltage for more than 6 minutes. The actuator will then be completely operable.

Alternative version:Normally Open (valve open) In case of the normally open version, ram motion is re-directed by mechanical means, resulting in precisely op-posite actuator function.

2

l indab | we simplify construction

We reserve the right to make changesWe reserve the right to make changes

Planning and installation notes

Connections Overview

Calculation of maximum cable length (copper cable) for 24 V rated voltageL = K × A / nA Conductor cross-section in mm²n Number of ActuatorsK Constant (269 m/mm²)L Cable length in m

We recommend the following cables for installing a 24 V system:Bell wire: Y(R) 0,8 mm²Light plastic-sheathed cable: NYM 1,5 mm²Flat webbed building wire: NYIF 1,5 mm²

Transformer:A safety isolating transformer according to EN 61558-2-6 (Europe) or class II FCC-quality proofed (North America) must always be used. Transformer dimensioning results from the making capacity of the Actuators.Rule-of-thumb formula: PTransformer = 6 W x n n = number of Actuators

Installation Positions

Preferred installation positions of the Actuator are verti-cal and horizontal. An up-side down position may reduce product life through special circumstances (e.g. contami-nated water).

Valve Adaptation

Valve adaptation is archived by a valve adapter which is available in different versions to suit the most common valve bottoms and heating circuit distributors (please consider when ordering).

Actuator

ThermostatR20...

Time-switch

24 V ACL1 L2

Stroke

VoltageDead-time

Hold time Time

TimeBreakMake

On

OffVoltage on

Stroke

VoltageDead-time

Hold time Time

TimeBreakMake

On

OffVoltage on

1) in dependence of the adaptor even higher2) in all installation positions3) special length on demand, but < 5.0m4) referring to standard valves

Actuator with valve adaptor

Actuators Actuator 24V

Technical information

Type A 4004 / A 4104Version normally closed / normally openVoltage 24 V AC/DC , +20%...-10 %, 0-60 HzMax. inrush current 250 mA during 2 min max.Operating current 75 mAOperating power 1.8 WClosing and opening times approx. 3 min.Actuator travel 4 mmActuating force 100 N ± 5%Fluid temperature 0 – 100 °C1)

Storage temperature -25 to +60°CAmbient temperature 0 to +60°CProtection type / protection class IP 542) / IIICE conformity according to EN 60730Housing / housing colour Polyamide / greyWeight 100 g with a 1 m connecting cableConnecting cable / length3) 2 x 0.75 mm2 PVC, grey / 1 m

Characteristic curves

Normally closed (NC)

Normally open (NO)

Actuator measurements

3

l indab | we simplify construction

We reserve the right to make changes

Actuators Alpha-Actuator

Technical information, Alpha-Actuators

Alpha-Actuator 4: Proportional AA 5004The Alpha-Actuator 4: Proportional is a thermo-electronic actuator for opening and closing valves in direct propor-tion to the applied control voltage. Powerless control is by a 0-10 V signal which is provided either by a room ther-mostat or by a central BMS system. If a control voltage is applied, the actuator opens the valve proportionally to the detected actuator travel. The wide choice of valve adapt-ers guarantees perfect adaptation to 99 % of all valve bot-toms and distributors available on the market.

Features

Control by a 0-10 V DC signalShort response times, resulting in improved control re-sponseFaster response times by stand-by operationSelf-calibration once every 24 hSmall dimensionsFirst Open functionFunction displayMaintenance-freeNoiselessHigh functional safety and long expected service life Low power consumptionPlug-in connecting cable360° installation positionPlug-in installationValve adapter systemAdaptation check on valve bottom100 % protection in case of leaky valvesAntitheft function by means of removable clear view visor

General information

Single room control of heating circuit distributors, radia-tors, cooling ceilings and similar units.Ideally suited in combination with central DDC systems in building services management systems

Scope of delivery (standard)1 x Alpha-Actuator 4: Proportional with first-open func-tion1 x connection line, 1 metre (plug-in type)1 x installation instructions in 10 languages

TypeAA 5004: Version 0 – 10 V; 100 kΩ - normally closed

Alternative designAA 5014: Version 2 - 10 V; 100 kΩ - normally closedAA 5024: Version 10 – 0 V; 100 kΩ - normally closed

Optionally available extensionsNon halogen connection lineOther control voltage variantsInput resistance 10 kWConnection line up to 20 mOperation voltage: DC

AccessoriesA valve adapter suiting your application can be enclosed in your order.

Functions

In generalThe actuator mechanism of the Actuator uses a PTC re-sistor heated wax element and a compression spring. The wax element is heated by applying the operating voltage and moves the integrated piston. The force gen-erated by this movement is transferred to the piston, thus opening or closing the valve.

Standard VersionFor the variant “normally closed”, the valve is opened once by 0.5 mm and then closed again after applying the oper-ating voltage of 24 V AC. For this, the first open function in unlocked and the valve closing point is detected. This ensures an optimum match with the specific valve used.If a control voltage of 0.5 – 10 V is applied after the cali-bration process, the actuator opens the valve – after the dead time has elapsed – with the piston movement, even-ly and permanently corresponding to the valve travel. An internal optical path measurement controls the tempera-ture required for the maximum stroke of 4 mm (minus over-elevation) and consequently the energy intake of the wax element. No excess energy is stores inside the wax element. If the control voltage is reduces, the elec-tronic control system immediately adapts the heat input to the wax element. In the range of 0 – 0.5 V, the actua-tor remains in a quiescent state in order to ignore ripple voltage occurring in long cables (Umin). After the waiting time is elapsed, the valve is closed evenly with the clos-ing force of the compression spring.The closing force of the compression spring is matched to the closing force of commercially available valves and keeps the valve closed when de-energized (NC).

4

l indab | we simplify construction

We reserve the right to make changesWe reserve the right to make changes

Actuators Alpha-ActuatorValve Adapter ConceptA valve adapter concept guarantees a perfect match of the actuator to almost any valve bottom or heating circuit distributor available on the market. Simply snap-on the Actuator to the pre-installed valve adapter.

Function displayThe function display (all-round display) of the Actuator shows at the first glance whether the valve is “open” or “closed”.

First open function (for NC only)In its delivery condition, the Actuator is kept open when de-energized due to the First open function (filling). This enables heating and cooling operation during the car-cass construction phase even when the electric wiring is not yet complete. During the later electrical start-up, the first open function is unlocked by applying the operating voltage for more than 6 minutes. The Actuator will then be completely operable.

Stand-by operationThe wax element is maintained at stand-by temperature 20 minutes after the control voltage has dropped below Umin.

Technical data

Type AA 5004Version Normally closedOperating voltage 24 V AC, -20%...+40%, 50-60 HzMax. inrush current <250 mA during 2 min. max.Operating current 83 mAOperating power 2 WControl voltage 0 – 10 V DCInput resistance 100 kΩ, (10 kΩ as option)Actuator travel 4mm (minus over-elevation);max.3,5 mmAverage actuation delay 30 s/mmActuating force 100 N+/- 5%Fluid temperature 0 - 100 °C 1)

Storage temperature -25 to +65°CAmbient temperature 0 to +60°CProtection type IP 54 2)

CE conformity according to 60730Housing / housing colour polyamide, white (RAL 9003)Weight 100 g without adapter and cableConnecting cable 3 x 0.22 mm2 PVC, whiteCable length/weight 1 m / 30 gSpecial length of connecting cable up to 20 m max.

Characteristic curves

Normally closed (NC)

Actuator measurements

1) Or higher, depending on the adapter length2) In all mounting positions with plug-in connection line3) Using standard valves

Active voltage control range

Over-elevation range

Pat

h (m

m)

Valv

e tr

avel

=0

Valv

e ad

apte

r bo

rder

UST in V

5

l indab | we simplify construction

We reserve the right to make changes

Vertical Horizontal Up-side down

Actuators Alpha-Actuator

Planning and installation notes

Connections Overview

Calculation of maximum cable length (copper cable) for 24 V rated voltageL = K × A / nA Conductor cross-section in mm²n Number of ActuatorsK Constant (269 m/mm²)L Cable length in m

We recommend the following cables for installing a 24 V system:Bell wire: Y® 0,6 mm²Light plastic-sheathed cable: NYM 1,5 mm²Flat webbed building wire: NYIF 1,5 mm²

Transformer: A safety isolating transformer according to EN 61558-2-6 (Europe) or class II FCC-quality proofed (North America) must always be used. Transformer dimensioning results from the making capacity of the Actuators.Rule-of-thumb formula: PTransformer = 6 W x n n = number of Actuators

Installation positions

Preferred installation positions of the Alpha-Actuator are vertical and horizontal. An up-side down position may reduce product life through special circumstances (e.g. contaminated water).

Valve adaption

Valve adaption is archived by a valve adapter which is available in different versions to suit the most common valve bottoms and heating circuit distributors (please consider when ordering).

24 V AC 0-10 V DC

Blue

Red

Black

Alpha-ActuatorAA 5004

Antitheft deviceThe Actuator can be protected against unauthorized ac-cess simply by removing the visor, e.g. on the radiator.