Grundfos DMB 1.0-10, Руководство пользователя

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6
I Connection for deaeration line
V Deaeration screw for manual deaeration
5. Installation
5.1 Installation location
Observe the permissible air humidity and the permissible ambient operation temperature, see section 1.3.7
Ambient and operating conditions.
5.1.1 Space required for operation and maintenance
The pump must be installed in a position where it is easily accessible during operation and maintenance work.
The control elements must be easily accessible during operation. Maintenance work on the dosing head and the valves must be
carried out regularly. Provide sufficient space for removing the dosing head and the valves.
5.1.2 Mounting surface
The pump must be mounted on a flat surface.
5.2 Mounting
Carefully tighten the screws, otherwise the plastic housing may be damaged.
5.2.1 Horizontal mounting
See fig. 3 on page 15.
• Use four M6 screws to mount the pump on the tank or on a console so that the suction valve is at the bottom and the discharge
valve is at the top (dosing always flows upwards).
5.2.2 Installation examples
See fig. 4 on page 15.
Pos. Components
1i Dosing tank
2i Electric agitator
3i Extraction device
5i Dosing pump
6i Relief valve
7i
Pressure-loading
valve
9i Calibration tube
10i Injection unit
15i Filter
5.3 Installation tips
l
For non-degassing media with a viscosity similar to water, the pump can be mounted on the tank (observe the permissible
suction lift).
l
Flooded suction preferred (not with Plus
3
system).
l
For media with a tendency to sedimentation, install the suction line with filter so that the suction valve remains a few
millimetres above the possible level of sedimentation.
With open outflow of the dosing medium or low counter-pressure
A positive pressure difference of at least 1 bar must be ensured between the co unter-pressure at the injection point and the pressure
of the dosing medium at the pump suction valve.
• If this cannot be ensured, install a pressure-loading valve immediately before the outlet or the injection unit.
Installation to avoid the siphon effect
See fig. 5 on page 16.
• To avoid the siphon effect, install a pressure-loading valve (7i) in the discharge line and, if necessary, a solenoid valve (14i) in
the suction line.
Installation with pressure relief valve and filter
See fig. 6 on page 16.
To protect the dosing pump against excessive pressure build-up, install a relief valve (6i) in the discharge line.
• For degassing media:
– Flooded suction