Applications; Venting The Pump; Product Introduction; Product Description - Grundfos ALPHA1 L Instrucciones De Instalación Y Funcionamiento
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- Instrucciones de instalación y funcionamiento (660 páginas) ,
- Manual de instrucciones (612 páginas) ,
- Instrucciones de instalación y operación (48 páginas)
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5.4 Venting the pump
1
2
Fig. 8
Venting the pump
Small airlocks trapped inside the pump may cause noise when
starting up the pump. However, because the pump is self-venting
through the system, the noise ceases over a period of time.
To speed up the venting process, do as follows:
1. Set the pump to speed III for approximately 10 minutes. How
fast the pump is vented depends on the system size and
design.
2. When you have vented the pump, that is when the noise has
ceased, set the pump according to the recommendations. See
section
7. Control
functions.
The pump must not run dry.
The pump is from factory set to radiator heating
mode.
6. Product introduction
6.1 Product description
ALPHA1 L model C is a complete range of circulator pumps.
= 10 min.
Max. 1.0 MPa (10 bar)
Min.
Max .
See section
6.1.1 Model type
These installation and operating instructions cover ALPHA1 L
model C. The model type is stated on the packaging.
6.2 Applications
The ALPHA1 L is designed for circulating liquids in all kinds of
heating applications. The pumps are suitable for the following
systems:
•
Systems with constant or variable flows where it is desirable to
optimise the pump duty point.
•
Systems with variable flow-pipe temperature.
ALPHA1 L is especially suitable for the following:
•
Installation in existing systems where the differential pressure
of the pump is too high during periods of reduced flow
demand.
•
Installation in new systems for automatic adjustment of the
performance to flow demands without the use of bypass
valves or similar expensive components.
High-efficiency ECM (Electronically Commutated Motor) pumps,
such as ALPHA1 L, must not be speed-controlled by an external
speed controller varying or pulsing the supply voltage.
The speed can be controlled by a low-voltage PWM (Pulse Width
Modulation) signal.
2 °C
0 °C
95 °C
55 °C
75 °C
95 °C
0.005 MPa
0.05 MPa
0.05 bar
0.5 bar
10. Technical data
for further information.
9
Capítulos
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