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

7. Control functions

7.1 Menu overview, SCALA2

Fig. 13 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. 14 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. 15 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
Note
required outlet pressure.
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 or
the setpoint cannot be reached
The maximum runtime has been exceeded
The temperature is outside the range
* For fault number 4, dry-running, the pump must be reset
manually. For fault number 4, water shortage, and the
remaining faults, 1, 2, 3, 5, 6 and 7, the pump will reset
whenever the cause has disappeared or been remedied. See
section
8.3.2 Auto reset.
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