Beretta EXCLUSIVE 25C, Installation And User Manual

Page: 45 / 50

EXCLUSIVE
43
Residual head of circulator
The residual head for the heating system is
represented in graph 1, according to the low
rate. The piping on the heating system must be
sized taking into account the available residual
head value.
Bear in mind that the boiler will operate correctly
if there is sufficient water circulation in the heat
exchanger.
To this end, the boiler is fitted with an automatic
by-pass which is designed to ensure water low
rate into the heat exchanger is correct under any
installation conditions.
graph1
6-metre circulator (as
standard)
600
550
500
450
400
350
300
250
200
150
100
50
0
0 100 200 300 400 500 600 700 800 900 1000 1100 1200
Flow rate (l/h)
graph 2
7-metre circulator
(optional)
700
650
600
550
500
450
400
350
300
250
200
150
100
50
graph 3
5-metre circulator
(optional)
0
500
450
400
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Flow rate (l/h)
350
300
250
200
150
100
50
graph 4
4-metre circulator
(optional)
0
400
350
300
0 100 200 300 400 500 600 700 800 900 1000 1100 1200
Flow rate (l/h)
250
200
150
100
50
0
0 100 200 300 400 500 600 700 800 900 1000
Flow rate (l/h)
4
R
esi
d
u
al
h
ead
(
m
b
ar
)
R
esi
d
u
al
h
ead
(
m
b
ar
)
R
esi
d
u
al
h
ead
(
m
b
ar
)
R
esi
d
u
al
h
ead
(
m
b
ar
)