Biral ModulA RED Serie Instrucciones De Instalación Y Funcionamiento página 10

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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 GREEN in air-conditioning units and cooling systems
− 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)
− Glycol:
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.