Engelmann
The heat meter specialists
®
Engelmann Sensor GmbH, Rudolf-Diesel-Straße 24-28 , 69168 Wiesloch-Baiertal, Germany
Phone.: +49 (0)6222-9800-217 , Fax: +49 (0)6222-9800-50, E-Mail: info@engelmann.de, www.engelmann.de
Article-No. 1080700010 - 2011-04-01
Page 1
Calculator with Ultrasonic
DE-09-MI004-PTB018 / 22.72/09.01
Installation and Operating Instructions
4.1 Safety instructions
– Look out for sharp edges (pipes, fl anges).
– Installation and deinstallation should only be carried out by
qualifi ed technical personnel.
– Mounting and dismounting may only be carried out without
pressure in the heating or cooling system.
– After installation a hydraulic pressure test should be carried out
using cold water to check for leaks.
– For safe operation, the instrument must be used only under the
stated operating conditions (see section 15: Technical Data).
In addition, the guarantee only applies if the allowed operating
conditions have been adhered to.
– The security seals may not be damaged, otherwise the guaran-
tee is no longer valid.
– Protection against lightning is not guaranteed; lightning protec-
tion must be implemented at the installation site.
4 Mounting the Flow Sensor
1 Application and Function
The
SENSOSTAR
®
2C US
Ultrasonic Meter is designed for the
measurement of heat and cooling energy. The connected fl ow sen-
sor must be installed in the return fl ow. Optionally, the meter can be
set in the factory to measure fl ow volume in the forward fl ow (state
when ordering – not for cooling meters!).
The instrument has an optical interface for read-out and parameteri-
zation. Optionally, the instrument can be equipped at the factory with
an M-bus interface, up to two pulse outputs (for energy and volume)
or alternatively with two pulse inputs. It is also possible to power the
instrument using a power pack (not available in combination with
M-bus power supply.)
4.2 General information on the fl ow sensor
– Be careful not to pick up the fl ow sensor on the plastic housing.
Always pick up and carry the sensor on the threaded or fl anged
connections.
– All cables must be laid at a minimum distance of 20 cm to high-
voltage current cables.
– If more than one sensor is being installed in a unit, care must
be taken to be sure that all the meters have the same installati-
on conditions.
– Overpressure must be applied in order to avoid cavitation in the
complete measurement range; this means at least 1 bar up to
qp and approx. 3 bar at overload qs (specifi cations for approx.
80°C).
– The fl ow sensor left the factory in conformance with all ap-
plicable safety regulations. Calibration, maintenance, repairs
and the exchange of parts may only be carried out by qualifi ed
technical personnel who are familiar with the dangers involved.
Further technical support can be provided by the manufacturer
upon request. Verifi cation seals on the fl ow sensor may not be
damaged or removed – otherwise the guarantee and verifi ca-
tion of the instrument no longer apply!
4.3 Technical data of the fl ow sensor
– Environmental class A (EN1434), for indoor installation
– Mechanical class M1*)
– Electromagnetic class E1*)
*) as per Measurement Instrument Directive 2004/22/EU
2 Scope of Delivery
• Calculator
SENSOSTAR
®
2C US
• Installation kit: 1 O-ring; 5 selfl ock seals + 5 sealing wires;
2 screws + 2 dowels for direct screw mounting (if this
technique is used - see section 9.3)
• Installation and Operating Instructions
• 2 gaskets for the fl ow sensor
3 General Information
All details and specifi cations listed in instrument data sheet or in
these installation and operating instructions must be adhered to:
• The valid statutory provisions and standards for the application of
instrument for the measurement of heat energy are: EN1434 parts
1+6 and the Directive 2004/22/EC with annexes I and MI-004.
• The instrument may only be installed or exchanged by qualifi ed
and authorized technical personnel.
• The regulations for electrical installations must be adhered to
• The applicable verifi cation regulations and periods for the country
in which the instrument is to be installed must be observed.
• The instrument left the factory in conformance with all applicable
safety regulations.
• The instrument must be stored and transported frost-free. The
temperature during storage or transport may not fall below 1°C.
The relative humidity during storage and transport may not be
more than 80%.
• The instrument identifi cation and the seals required for verifi cation
of the instrument must not be damaged or removed – otherwise
the guarantee and verifi cation of the instrument no longer apply!
• To clean the instrument (only if necessary) use a slightly moist
(not dripping wet!) cloth.
• To protect against damage and dirt the instrument should only be
removed from the packaging directly before installation.
• All electrical connections of the instrument must be laid at a
minimum distance of 50 cm to sources of electromagnetic
interference (switches, controllers, pumps, etc.)
• All instrument connections must be laid at a minimum distance
of 10 cm to other current-carrying wires.
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