Application Area; Function; Installation And Assembly - Kemper CONTROL-PLUS Operating Instructions Manual

2

Application area

The flowmeter valve with integrated vortex hydrodynamic sensor and Pt1000 is used for the
precise measurement of volume flow rates and temperatures in drinking water systems aimed at
setting predefined volume flows in accordance with the calculation base. The flowmeter valve is
also suitable for hot water circuits with the usual additives (glycol) for water after-treatment, and
for well water (filtered). For Figure 138 4G, KEMPER recommends using an optionally available
hand-held measuring instrument (readout and meter) with digital display and storage facilities
(Figure 138 00 002) for the volume flow, temperature and flow rate parameters. For Figure 138
6G the sensor can be connected to the BMS or DDC technology to display the volume flows and
temperatures. The flowmeter valves are on both sides equipped with external threads complying
with DIN 3546, part 1, for the universal connection of fittings for copper, steel, stainless steel and
multilayer composite pipes ranging from DN 15 to DN 50.
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Function

The function of the flowmeter sensor is based on the principle of Karman's vortex trail. The
vortices are shed at the damming body placed in the current in proportion to the flow rate. Any
vortices created are detected via a piezoelectrical paddle and converted into a frequency signal
by the integrated electronic circuits. A Pt1000 is additionally integrated in the damming body for
measuring the temperature. The flowmeter valve may not be applied to throughflow volumes be-
low the measuring range as no assessable vortices occur below this measuring range. The results
of measurements taken below the measuring range are hence misleading and erroneous (please
pay attention to the measuring range!). With the KEMPER portable 'Control-plus´ measuring
device (reading and measuring device, Figure 138 00 002), any application below the measuring
range is detected automatically.
4

Installation and assembly

The installation position is arbitrary as a matter of principle. If there is a risk of sediments being
deposited in horizontal pipes, mounting the sensor on top of the pipe is recommended. The mea-
suring section may not contain any foreign bodies.
Inflow side installation: following valves and/or fittings a minimum of 5 x DN, following pumps a
minimum of 30 x DN
Outflow side installation: the connection diameter on the outflow side may not be smaller than
the valve diameter.
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