Mohlenhoff OEM-Actuator 24 V Manual

Normally Open (valve open)
In case of the normally open version, ram motion is redirected by
mechanical means, resulting in precisely opposite actuator function.
Functions
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 operating voltage is cut and after
expiry of the hold time, the valve is closed evenly by the closing 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 normally
closed.
Valve-Adapter-Concept
A valve-adapter concept guarantees a perfect match of the actuator
to almost any valve bottom or heating circuit distributor available
on the market. imply snap-on the OEM-Actuator to the pre-installed
valve adapter.
Function Display
The function display of the OEM-Actuator (all-round display) allows
identifying the operating condition (valve open or closed) at a glance.
Standard Version
Alternative Version
The actuator mechanism of the OEM-Actuator uses a PTC resistor-
heated elastic element and a compression spring. The wax element
is heated by applying the operating voltage and moves the integrated
piston. The force generated by the movement is transferred on the
piston lifter and thus opens and closes the valve.
First-Open function (for NC only)
In its delivery condition, the OEM-Actuator is kept open when de-
energised due to the First-Open function (filling). This enables heating
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 operating
voltage for more than 6 minutes. The OEM-Actuator will then be
completely operable.
Actuators
Technical Information
OEM-Actuator
OE -Actuator 24 V
The OEM-Actuator serves for optimum control of valves on heating
circuit distributors. Control is done a room thermostat with two-
point output or pulse-width modulation.
Application
General Information
Scope of Supply (standard)
l1x OEM-Actuator (Version: normally closed)
l1x cable 1 meter
l1x installation manual with ten languages
Alternative Version:
lVersion normally open
Type
A 4004: Version 24 V  normally closed
A 4104: Version 24 V  normally open
Optional available extensions:
l First-Open function (only for normally closed)
l non halogen connection cable
l Other cable length are available
Accessories
A valve adapter suiting your application can be enclosed in the
actuator packing.
Customer-specific Version
Customer-specific versions are possible on request.
Ordering Information
Our staff will be glad to assist you in finding the actuator fitting your
application. Call us at: +49 5341 - 84 75 - 0
Features
lOEM design
lCompact size, small dimensions
lAvailable in normally closed (NC) or normally open (NO)
lPatented 100% protection against leaky valves
lAll around function indicator
lMaintenance-free
lNoiseless
lHigh functional safety and long expected service life
lLow power consumption
l360° installation position
lnap-on installation
lValve-adapter concept
lAdaptation check on valve
The OEM-Actuator 24 V is a thermoelectric actuator for opening and
closing valves on heating circuit distributors of concealed floor heating
and cooling systems.
The OEM-Actuator has been developed especially for customer-
specific usage in the oem business. Features, as protection in case of
leaky valves, compact and modern casing, versions in normally closed
and normally open, valve adapter concept and an enhanced life time
have been of particular importance. This allows to fulfill the
requirements within the bounds of technical reliability, improved
installation and customer-/service friendliness for manufacturer of
concealed floor heating and cooling systems. Additional
differentiations through customer specific versions are possible.
The OEM-Actuator 24 V is controlled by a 24 V room thermostat with
two-point output or pulse-width modulation.
In General
Extended Version

Actuators
Technical Data
Technical Information
OEM-Actuator
Type A 4004 / A 4104
Version normally closed / normally open
Voltage 24 V AC/DC, +20%...10%, 0 0 Hz
Max. inrush current 250 mA during 2 min max.
Operating current 75 mA
Operating power 1.8 W
Closing and opening times approx. 3 min.
Actuator travel 4 mm
Actuating force 100 N ± 5%
Fluid temperature 0 - 100 °C 1)
Storage temperature -25 to + 0°C
Ambient temperature 0 to + 0°C
Protection type / protection class IP 54 2) / III
CE conformity according to EN 0730
Housing / housing colour Polyamide / grey
Weight 100 g with a 1 m connecting cable
Connecting cable / length 3) 2 x 0.75 mm2 PVC, grey / 1 m
Technical changes reserved. 8-D58-40-342 Index 25. Reprint, in whole or in part, is only admissible with our approval.
Characteristic Curves
Normally Closed (NC) Normally Open (NO)
max
4
3
2
1
0
max
4
3
2
1
0
on
off voltage on
time
make break
stroke [mm]
voltage
time
dead
time hold time
on
off voltage on
time
make break
stroke [mm]
voltage
time
dead
time hold time
Möhlenhoff Wärmetechnik GmbH
Museumstraße 54a
38229 alzgitter / Germany
Telefon [phone]·8475-0
Telefax +49 (0)53 41·8475-99
E-Mail: [email protected]
Internet: www.moehlenhoff.com
OE -Actuator with valve adapter
1) in dependence of the adapter even higher
2) in all installation positions
3) special length on demand, but < 5.0 m
4) referring to standard valves
Planning and Installation Notes
Valve Adaptation
Installation Positions
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).
Prefered installation positions of the OEM-Acutator are vertical and
horizontal. An up-side down position may reduce product life through
special circumstances (e.g. contaminated water).
Calculation of maximum cable length (copper cable) for 24 V rated voltage
L = K x A / n
A Conductor cross-section in mm²
nNumber of Actuators
KConstant (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 mm2
Light plastic-sheathed cable: NYM 1,5 mm2
Flat webbed building wire: NYIF 1,5 mm2
Transformer:
A safey 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 OEM-Actuators.
Rule-of-thumb formula:P
Transformer = 6 W x
n = number of OEM-Actuators
Connections Overview
24 V AC
L1 L2
OEM-Actuator
A 4004 / A 4104
time-switch
Thermostat
R 20..
+4 mm
47 mm
54 mm
4)
44 mm