English (GB)
7
4.3 How to set the correct pressure
The pump can be set to provide a water pressure between 1.5 to
5.5 bar (22 to 80 psi) at intervals of 0.5 bar (7 psi).
The factory setting is 3 bar (44 psi). See section
.
4.3.1 Boosting from a well or a tank
If you are boosting from a well or a tank, make sure not to set the
pressure setpoint too high. The difference between the inlet
pressure and outlet pressure must not exceed 3.5 bar (51 psi).
Fig. 10
Boosting from a well or a tank
4.3.2 Boosting from the mains
The pressure settings 4.5, 5.0 and 5.5 bar (65, 73 and 80 psi)
require a positive inlet pressure and these settings must only be
used when boosting from the water mains.
Fig. 11
Boosting from the mains
4.3.3 Self-learning setpoint
If the pump cannot reach the user-defined pressure setpoint, the
self-learning function will automatically lower the setpoint. See
section
4.4 Shaft seal run-in
The shaft seal faces are lubricated by the pumped liquid. A slight
leakage from the shaft seal of up to 10 ml per day or 8 to 10 drops
per hour may occur.
When the pump is started up for the first time, or when the shaft
seal has been replaced, a certain run-in period is required before
the leakage is reduced to an acceptable level. The time required
for this depends on the operating conditions, that is, every time
the operating conditions change, a new run-in period will be
started.
Under normal conditions, the leaking liquid will evaporate. As a
result, no leakage will be detected.
The leakage is visible where the screws are mounted on the base
plate. If the unlikely event of an internal leakage occurs, the liquid
will be drained through the bottom of the pump. Install the pump
in such a way that no undesirable collateral damage can arise.
5. Handling and storing the product
5.1 Handling the product
5.2 Storing the product
If the pump is to be stored for a period of time, for example during
the winter, drain it and store it indoors in a dry location. See
section
10. Starting up the product after standstill
Temperature range during storing must be -40 to 70 °C (-40 to
158 °F).
6. Product introduction
6.1 Product description
Fig. 12
Grundfos SCALA2 pump
The inlet and outlet openings include flexible connections of ± 5 °.
We recommend to use the default pressure of 3.0 bar
(44 psi) which will suit most applications.
The difference between the inlet pressure and outlet
pressure must not exceed 3.5 bar (51 psi).
Example: If the inlet pressure is 0.5 bar (7 psi), the
maximum outlet pressure is 4 bar (58 psi).
If you set the pressure too high, this might cause the
pump to operate for up to three minutes after the tap
is turned off.
Maximum setpoint
[bar (psi)]
Well application
3.0 (44)
Tank below ground level
3.5 (51)
Tank above ground level
4.0 (58)
TM
07 00
75 41
17
TM
07 00
76 41
17
TM
07
00
74
41
17
Take care not to drop the pump as it may break.
Maximum relative humidity during storing: 95 % RH.
T
M
06
38
18
10
15
Pos. Description
1
Air valve for built-in pressure tank
2
Operating panel. See section
.
3
Nameplate. See section
.
4
Plug for access to pump shaft. See section
.
5
Priming plug. See section
6
Outlet opening. See section
7
Inlet opening. See section
8
Drain plug. See section
.
9
Ventilation holes. They must not be flooded.
1
5
6
7
8
2
3
4
9
