Control Functions; Elements On The Control Panel; Display; Setting The Pump - Grundfos ALPHA2 Instrucciones De Instalación Y Funcionamiento

8. Control functions

8.1 Elements on the control panel

Fig. 9 Control panel
Pos. Description
Display showing the power
1
consumption in watt or the flow.
Light field indicating high and low flow
2 Production code:
• 1st and 2nd figures: year
• 3rd and 4th figures: week
3 Light field indicating fixed speed
4 Light field indicating constant pressure
5 Light field indicating AUTO
Push-button for selection of pump
6
setting

8.2 Display

The display (1) is on when you have switched on
the power supply.
The display shows the actual pump power
consumption in watt (integer) or the actual flow
during operation.
If a fault is indicated, correct the fault and reset
the pump by switching the power supply off and
on.
If the pump impeller is rotated, for example
when filling the pump with water, sufficient
energy can be generated to light up the display
even if the power supply has been switched off.
Light field indicating high and low flow
• The light field blinks for low flow
– If the flow is lower than 1 gpm, the light
field alternately flashes between "0" and
"1" randomly.
• The light field shows HI for high flow
– If the flow is higher than 12 gpm, the light
field shows "HI" on user interface.
14
8.2.1 Light fields indicating the pump setting
The pump has optional performance settings
which you can select with the push-button. See
fig. 9.
The pump setting is indicated by light fields in
the display. See fig. 10.
Fig. 10
For more information about the function of the
settings, see section

8.3 Setting the pump

You can change the pump setting by pressing
the push-button.
8.3.1 Factory default setting
The pump's factory default setting is the
AUTO
8.3.2 Changing from recommended to
Heating systems are "slow" systems that cannot
be set to the optimum operation within minutes
or hours.
However, if the recommended pump setting in
ADAPT
some applications does not give the desired
distribution of heat in the rooms of the house,
you can change to an alternative pump setting.
8.4 Selection of control mode by
application
Application
Floor heating
Two-pipe system
Ventilation
Boiler-shunt
One-pipe system
Domestic hot water
See also sections
8.6 Pump performance and operating mode
selection.
Light fields
9. Fault finding the
setting.
ADAPT
alternative pump setting
Control mode
Constant pressure
AUTO
Speed 1, 2 or 3
Speed 1, 2 or 3
Speed 1, 2 or 3 or
constant pressure
Speed 1, 2 or 3
8. Control functions
product.
ADAPT
and