English (GB)
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5. Handling and storing the product
Always lift directly on the pump head or the cooling fins when
handling the pump. For large pumps, it may be necessary to use
lifting equipment. See section 2.3 Lifting the product.
6. Product introduction
6.1 Product description
Grundfos MAGNA1 is a complete range of circulator pumps with
integrated controller enabling adjustment of pump performance to
the actual system requirements. In many systems, this reduces
the power consumption considerably, reduces noise from
thermostatic radiator valves and similar fittings and improves the
control of the system.
You can set the desired head on the operating panel.
6.2 Intended use
The pump is designed for circulating liquids in the following
systems:
• heating systems
• domestic hot-water systems
• air-conditioning and cooling systems.
You can also use the pump in the following systems:
• ground-source heat-pump systems
• solar-heating systems.
6.3 Pumped liquids
The pump is suitable for thin, clean, non-aggressive and
non-explosive liquids, not containing solid particles or fibres 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, for
example the German standard VDI 2035.
The pump is also suitable for domestic hot-water systems.
We strongly recommend that you use stainless-steel pumps in
domestic hot-water applications to avoid corrosion.
In domestic hot-water systems, we recommend that you use the
pump 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 65 °C to eliminate the risk of lime
precipitation.
6.3.1 Glycol
You can use the pump for pumping water-ethylene-glycol
mixtures up to 50 %.
Example of a water-ethylene-glycol mixture:
Maximum viscosity: 50 cSt ~ 50 % water and 50 % glycol mixture
at -10 °C.
The pump has a power-limiting function that protects it against
overload.
The pumping of glycol mixtures affects the maximum curve and
reduces the performance, depending on the
water-ethylene-glycol mixture and the liquid temperature.
To prevent the glycol mixture from degrading, avoid temperatures
exceeding the rated liquid temperature and minimise the
operating time at high temperatures.
Clean and flush the system before you add the glycol mixture.
To prevent corrosion or lime precipitation, maintain the glycol
mixture regularly. If further dilution of the supplied glycol is
required, follow the glycol supplier's instructions.
Fig. 19 Pumped liquids
If the pump is not used during periods of frost, add
antifreeze or let the pump run in regular intervals to
prevent frost bursts.
Observe local regulations concerning limits for
manual lifting or handling.
Observe local regulations regarding pump-housing
material.
Do not pump aggressive liquids.
Do not pump flammable, combustible or explosive
liquids.
Additives with a density or kinematic viscosity higher
than water reduces the hydraulic performance.
TM06 8055 0717
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