Area Of Use - flamco Flexcon VSV Montage- Und Bedienungsanleitung

ф Flamco
1. General
The purpose of Flexcon VSV and V-B intermediate vessels in sealed heating systems with
operating temperatures in excess of 70 °C is to reduce the temperature of the water entering the
expansion vessel. The expansion volume temperature may exceed the critical value of 70 °C due to
a number of frequently used components, e.g. pump-controlled return boost, standard connection
of the expansion pipe to the hot leg or high cold leg temperatures.
The temperature is reduced by storing the water in the Flexcon VSV and V-B. The hot water
entering the vessel from the top mixes with the cooler stored water volume. The expansion pipe
connection to the bottom of the vessel carries significantly cooler water to the diaphragm pressure
expansion vessel. In order to maintain the VSV and V-B intermediate vessel's function, these pipes
must not be insulated.
Given our practical experience and synchronization with various other users we recommend vessel
volumes based upon the following:
• Operating temperature up to 120 °C, 20 % of expansion volume.
• Operating temperature up to 140 °C, 30 % of expansion volume.
• Operating temperature up to 150 °C, 50 % of expansion volume.
2. Area of use
Parameters for use: see product label on vessel.
Please adhere to these parameters. They are there for your safety and must not be exceeded.
The vessel was designed in accordance with the terms of the European Pressure Equipment
Directive (97/23/EC). An EC type examination certificate for the Flexcon VSV and V-B intermediate
vessel is available.
Installation instructions, inspection precautions and operational safety measures
The Flexcon VSV and V-B intermediate vessels are supplied as an assembly, in either upright or
horizontal position. The vessels must be installed in closed rooms not susceptible to frost in such
a way that they can be serviced, checked and operated freely at all times. The minimum distances
for installation of individual vessels must be ascertained in relation to the conditions in situ during
planning and installation. The surfaces on which the units are to be set up must be prepared in
such a way as to guarantee long-term structural stability. The connections from the system to
the vessel (feed at the top, drain at the bottom) must be connected in situ.
It must be possible to shut off the vessel from the heating system; the isolating devices must be
safeguarded against unintentional closure (i.e. with a lockshield valve). If the vessel needs to be
emptied via a separate drain, there is an appropriate У2" opening at the bottom of the vessel.
A condition for safe use of Flexcon VSV and V-B intermediate vessels in heating systems is that
they are sufficiently safeguarded against excessive inlet temperature and operating pressure.
The most important features in this respect are:
• Each heat generator must have a suitable temperature controller to adjust the heating to match
heat consumption.
• Each indirectly-heated heat generator must have an overtemperature protection switch with
an independent sensor.
• Each directly-heated heat generator must be equipped with a suitable temperature limiter with
an independent sensor.
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