General Information; Intended Use; Requirements Of The Pumped Medium - Biral AX RED Serie Instructions D'installation Et D'entretien

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3. General information

The Biral series, AX... 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 Intended use

Biral circulation pumps from the AX... series are intended for circulating fluids in the following
equipment:
– AX... RED: Heating systems (floor heating, single and dual pipe heating systems)
– AX... BLUE: in domestic hot water systems
The pumps are suitable for use in systems with variable or constant pumped volumes.

3.2 Requirements of the pumped medium

AX... is suitable for the circulation of the following media:
– Pure, thin, non-explosive and non-aggressive media without solid or long fibrous elements,
which will not affect the pump either mechanically or chemically.
– Cooling liquids free of mineral oil
– Softened water
– 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.
For the delivery of a liquid with density that
differs from water and/or kinematic viscosity,
the delivery output is reduced.