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4.1 Single-phase versions
The single-phase versions can be switched on/off on the pressure
switch. See fig. 1.
On/off button on the pressure switch
Fig. 1
4.2 Three-phase versions
The three-phase versions are controlled by the CS 103 controller.
The CS 103 offers the following functions and operating buttons:
•
Automatic pump operation by means of the pressure switch.
•
Main switch, see fig. 2.
•
Stop button, see fig. 2.
•
Start button, see fig. 2.
•
Pump and system monitoring functions:
– Short-circuit and overload protection by means of an
automatic circuit breaker.
– Dry-running protection by means of an additional pressure
switch or level switch (accessory). See section 5.4.
Figure 2 shows the control panel of the CS 103 controller.
CS 103 control panel
Main switch
Fig. 2
5. Installation
5.1 Location
The booster set should be placed in a well-ventilated room to
ensure adequate cooling of the pump motors. It should be placed
with a 0.5 metre clearance in front and on the two sides.
The tank must be placed on the floor/wall anywhere around the
booster set.
On/off button
Pressure
switch
Stop
Start
5.2 Foundation
The booster set does not require a special foundation, but it
should be positioned on a plane and solid surface, e.g. a concrete
floor.
5.3 Pipework
The five-way fitting has two Rp 1 threads, one for the tank and
one for the discharge pipe.
The pipes connected to the booster set must be of adequate size.
To avoid resonance, expansion joints should be fitted in the
suction and discharge pipes. See fig. 3.
The booster set is not designed to support the
connected pipes and the tank. The pipes must be
Caution
fastened to parts of the building to ensure that
they cannot move or be twisted. See fig. 3.
The tank must be placed on the floor/wall anywhere around the
booster set.
The booster set should be tightened up before start-up.
2
1
1
Fig. 3
1. Expansion joint.
2. Pipe hanger.
Tank, expansion joints and pipe hangers shown in fig. 3 are not
included in the standard booster set.
5.4 Dry-running protection
Accessory for three-phase versions only: It is possible to
install a pressure switch (normally open (NO)) on the suction side
of the booster set to monitor the inlet pressure and to prevent the
booster set from running dry (a level switch can be used if the
suction side is connected to an open tank).
When the inlet pressure/level drops below the set value (0.4 bar),
the pump is cut out. When the correct pressure/level is restored
(1.2 bar), the pump is cut in automatically.
5.5 Tank selection
To ensure reliable operation, the booster set must be connected
to a diaphragm tank (or bladder tank). A 80-litre tank is
recommended, but the tank volume can be optimised according
to the pumping condition.
The optimised tank volume can be calculated from the following
formula:
⋅
⋅
Q 1000
--------------------------------------------------------------------------- - x
V
=
4n
V =
Tank volume [litres].
3
Q =
Mean flow [m
/h].
Δp =
Difference between cut-in and cut-out pressures.
Cut-in = Cut-in pressure [bar].
n
=
Maximum number of starts/stops per hour:
max.
n
= 100.
max.
k =
Constant for diaphragm tank (or bladder tank)
precharge pressure: k = 0.9.
5.6 Priming
Do not start the pump until it has been filled with liquid.
See installation and operating instructions for CHV pumps.
Start-up is carried out according to section 7.
2
(
(
)
Δp
)
1
+
cut-in
+
1
-- -
⋅
Δp
k
max
7
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