En
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8
6.3 Setting the pressure switch
The cut-out pressure must be lower than the
maximum operating pressure of the pump and tank.
Remove the cover from the pressure switch to
access the adjusting screws. See fig. 1.
Fig. 1
Pressure switch
Setting the cut-out pressure
1. Turn screw (pos. A) clockwise to increase the
cut-out pressure.
Turn it counter-clockwise to reduce the cut-out
pressure.
The differential pressure range remains
unchanged.
2. Start the pump and check by reading the
pressure gauge whether the desired cut-out and
cut-in pressures have been obtained.
Setting the cut-in pressure
1. Turn screw (pos. B) clockwise to reduce the
cut-in pressure.
Turn it counter-clockwise to increase the cut-in
pressure.
The differential pressure range is widened and
narrowed respectively.
2. Start the pump and check by reading the
pressure gauge whether the desired cut-out and
cut-in pressures have been obtained.
Repeat the procedure until the right cut-in and
cut-out pressures have been obtained.
7. Operation and maintenance
8. Frost protection
If there is a risk of frost, the tank and pump must be
drained.
9. Technical data
Ambient temperature
M40 °C.
Storage temperature
Minimum -10 °C.
M45 °C.
Liquid temperature
+35 °C.
System pressure
Maximum 6 bar.
Inlet pressure
At inlet pressures above 1.5 bar the discharge
pressure must be at least 2.5 bar.
Supply voltage
1 x 220-240 V, 50 Hz.
Insulation class
F.
Enclosure class
IP44.
Relative air humidity
Maximum 95 %.
Sound power level
The sound power level of the pump is lower than
72 dB(A).
Start/stop frequency
Maximum 20 per hour.
Warning
Switch off the power supply before
adjusting the pressure switch.
Fit the cover on the pressure switch
before you switch on the power supply
to check the cut-in and cut-out
pressure.
T
M
0
5
2
7
1
1
041
2
Warning
Prior to start-up, the system should be
flushed through with clean water and
drained to remove possible impurities.
Caution
Do not cover the motor of the booster
system as an adequate supply of cool
air must reach the motor cooling fan.
