Applications; Pumped Liquids; Installation; Positioning - Grundfos MAGNA 2000-Serie Montage- Und Betriebsanleitung

3. Applications

The GRUNDFOS MAGNA is designed for circulating
liquids in heating and air-conditioning systems.
The pump can also be used in domestic hot-water
systems.
The pump range is primarily used in
• systems with a variable flow.
The pump range can also be used in
• systems with a constant flow where it is
desirable to optimise the setting of the pump duty
point,
• systems with variable flow-pipe temperature.

3.1 Pumped liquids

Thin, clean, non-aggressive and non-explosive
liquids, not containing solid particles, fibres or
mineral oil.
In heating systems, the water should meet the
requirements of accepted standards on water quality
in heating systems, e.g. the German standard
VDI 2035.
In domestic hot-water systems, it is advisable to
use GRUNDFOS MAGNA pumps only for water with
a degree of hardness lower than approx. 14 °dH.

4. Installation

Warning
The pump must not be used for the
transfer of inflammable liquids such as
diesel oil, petrol or similar liquids.
Arrows on the pump housing indicate the liquid flow
direction through the pump.

4.1 Positioning

GRUNDFOS MAGNA must be installed with the
pump head in horizontal position. See page 297.

4.2 Changing the control box position

Warning
Before any dismantling of the pump,
the system must be drained or the
isolating valves on both sides of the
pump must be closed as the pumped
liquid may be scalding hot and under
high pressure.
Procedure:
Step Action
Remove the two
1
screws.
Pull the stator and
2 the pump head
approx. 5 mm out.
Turn the stator and
3 the pump head to
the desired position.
Push the stator and
4 the pump head into
place.
5 Refit the two screws.
4.2.1 Control box position
For permissible control box positions, see the Quick
Guide.
Illustration
9