Pumped Liquids - Grundfos MAGNA3 Manual

MAGNA3
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Pumped liquids

The pump is suitable for thin, clean, non-aggressive
and non-explosive liquids, not containing solid
particles or fibers that may attack the pump
mechanically or chemically.
In heating systems, the water must meet the
requirements of accepted standards on water quality in
heating systems.
In domestic hot-water systems, we recommend that
you use MAGNA3 pumps only for water with a degree
of hardness lower than approximately 14 °dH.
In domestic hot-water systems, we recommend that
you keep the liquid temperature below 149 °F (65 °C)
to eliminate the risk of lime precipitation.
You can use MAGNA3 pumps for pumping water and
glycol mixtures up to 50 %.
Example of a water and ethylene glycol mixture:
Maximum viscosity: 10-50 cSt ~ 50 % water and 50 %
ethylene glycol mixture at +14 °F (10 °C).
The pump is controlled by a power-limiting function
that protects against overload.
The pumping of glycol mixtures will affect the
maximum curve and reduce the performance,
depending on the water and ethylene glycol mixture
and the liquid temperature.
To prevent the ethylene glycol mixture from degrading,
avoid temperatures exceeding the rated liquid
temperature and minimize the operating time at high
temperatures.
You must clean and flush the system before the
ethylene glycol mixture is added.
To prevent corrosion or lime precipitation, maintain the
ethylene glycol mixture regularly. If further dilution of
the supplied ethylene glycol is required, follow the
glycol supplier's instructions.
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