Control Functions; Menu Overview, Scala2 - Grundfos SCALA2 Installation And Operating Instructions Manual

7. Control functions

7.1 Menu overview, SCALA2

Fig. 12 SCALA2 operating panel
SCALA2 Function
On/off
Increases the outlet pressure
Decreases the outlet pressure
Resets alarms
Indicates the required outlet pressure
Indicates that the pump has been stopped manually
Indicates that the operating panel is locked
7.1.1 Pressure indicator, SCALA2
The pressure indicator shows the required outlet pressure from
1.5 to 5.5 bars (22 to 80 psi) in 0.5 bar (7.5 psi) intervals. The
illustration below shows a pump set to 3 bar (44 psi) indicated by
two green lights and a pump set to 3.5 bar (51 psi) indicated by
one green light.
Fig. 13 SCALA2 outlet pressure indication
8
BAR
5.5
}
5.0
4.5
}
4.0
3.5
}
3.0
2.5
}
2.0
1.5
Fig. 14 Pressure indication table
The pressure settings 4.5, 5.0 and 5.5 bar (65, 73
and 80 psi) require a minimum positive inlet
pressure which is maximum 4 bar (58 psi) lower
than the required outlet pressure.
Note
Example: If the required outlet pressure is 5 bar,
the minimum inlet pressure must be 1 bar (14.5
psi).
7.1.2 Indicator lights, SCALA2
Indications Description
Operating indications
The operating panel is locked
Power supply failure
The pump is blocked, e.g. the shaft seal has
seized up
Leakage in the system
Dry-running or water shortage*
The maximum pressure has been exceeded
The maximum runtime has been exceeded
The temperature is outside the range
* For fault number 4, dry-running, the pump will try to reset
automatically in a sequence of three attempts within the first
minute. After this, eight attempts within an hour and
repeatedly once every 24 hours. For the remaining faults, 1, 2,
3, 5, 6 and 7, the pump will reset whenever the cause has
disappeared or been remedied.
For further information about system status, see section
12.1 Grundfos Eye operating indications.
PSI Water colum kPa MPa
[m]
80 55 550 0.55
73 50 500 0.50
65 45 450 0.45
58 40 400 0.40
51 35 350 0.35
44 30 300 0.30
36 25 250 0.25
30 20 200 0.20
22 15 150 0.15