Biral ModulA RED Serie Instrucciones De Instalación Y Funcionamiento página 11

3. General information
The Biral series, ModulA consists of a complete range of circulation pumps with integrated
frequency converter, which enable independent or controlled adaptation of output to the actual
requirement of each system. Therefore, in many systems, energy consumption will be reduced
and the control behaviour of the system improved.
Besides this, current noise from control cabinets can be reduced effectively.
All necessary settings can be adjusted using the control panel for the pump.
3.1 Purpose
Biral circulation pumps of the ModulA series are intended for the circulation of liquids in the
following systems:
– ModulA RED in heating units
– ModulA BLUE in domestic hot water systems
The pumps can also be used in the following systems:
– Geothermal heat pumps
– Thermal solar equipment
The pumps are suitable for use in systems with variable and constant delivery volumes.
3.2 Requirements of the delivery medium
The pump is suitable for delivery of pure, thin, non-explosive and non-aggressive media
without fixed or long-fibred elements, which do not affect the pump either mechanically or
chemically.
– Heating water:
Requirements according to current standards that apply to water quality in heating systems:
(e.g. VDI 2035)
– Glykol:
The pump can be used for delivering water-glycol mixes. Maximum permissible viscosity:
50 mm²/s (cSt).
This corresponds to a water-ethylene-glycol mix with a glycol content of around 50% at –10°C.
The pump is controlled via an output-limiting function that protects against overload.
The delivery of glycol mixes affects the MAX characteristic curve because the delivery
capacity is reduced accordingly, based on the glycol content and temperature of the media.
So that the effect of the glycol is not reduced, temperatures above the nominal temperature
given for the medium should be avoided. Generally, the operating duration with high media
temperatures should be minimised. Before adding the glycol mix, it is vital that the system is
cleaned and rinsed.
To avoid corrosion or precipitations, the glycol mix should be checked regularly and changed
if necessary. If the glycol mix has to be further thinned, the specifications from the glycol
manufacturer should be adhered to.
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