Robur CALDARIA CONDENSING 100, Installation And Use Instructions Manual, Page: 15 / 39

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15
To help the designer choose
the correct pump, Figure 21
shows the curve of flow
resistance values inside the
boiler
(for a Caldaria
Condensing 100)
In the case of an installation in
series the designer could use
the curve flow shown on
Figure 22, where there is the
pressure drop curve for a
general installation with n
burners: changing the n value
(n=1, 2, 3….) the designer
could obtain different flow
resistance value.
COROLLA 501 / 502
0
100
200
300
400
500
600
700
800
0 1000 2000 3000 4000 5000
l/h
m
bar
Figure 21
For example if we have one Caldaria Condensing 100 master and two Caldaria Condensing 100 slave
connected (with a total power of 300 kW) on the x we have a flow rate of 2000 x 6 =12000 l/h (12 m
3 /h) and
the correspondent value for the pressure drop.
0
100
200
300
400
500
600
700
800
0 x n 500 x n 1000 x n 1500 x n 2000 x n 2500 x n 3000 x n
l/h
m
b
a
r
Figure 22
We have to remember that the pump has to supply 2000 l/h with a pressure drop of 6 meters. To assure a
correct performance of the pump, it is necessary to use a pump with a curve flow/pressure-drop as plate as
possible.
5 Power supply system
5.1 Power supply
The electrical drawing of the Caldaria Condensing 100 series thermal assembly is shown in detail in chapter
11.
Some important electrical features of the thermal assembly are specified on the appliance's rating plate.
(Figure 5)
Boiler installation requires the connection to a 230 v - 50 Hz mains. The connection should be made in full
compliance with the applicable electrical standards.
However, it is always advisable to install a magneto thermal differential switch along the boiler's power
supply line.
In Figure 23 is shown the terminal block of the master board. In Figure 24 is shown an example of an
electrical connection of some external device.