42
EXCLUSIVE
Residual head of circulator
T
he residual head for the heating system is
represented in graphic 1, according to the flow
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 flow
rate into the heat exchanger is correct under any
installation conditions.
6-metre circulator
(factory setted)
Flow rate (l/h)
Residual
head
(mbar)
0
50
100
150
200
250
300
350
400
450
500
550
600
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
Portata impianto (l/h)
Pr
ev
alenza (mbar)
PMW
pump
modulation area
graphic 1
setted to
7-metre circulator
graphic 2
setted to
5-metre circulator
graphic 3
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
Pr
ev
al
en
za
[m
ba
r]
Portata impianto [l/h]
Prevalenza residua disponibile all'impianto circolatori UPM3 ZB 15-70 e FLEX AS 7m
[codd. 20091499 - 20091500/1/2 imposta
ti
a 7 m]
-
Flow rate (l/h)
Residual
head
(mbar)
PMW
pump
modulation area
0
50
100
150
200
250
300
350
400
450
500
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
Pr
ev
al
en
za
[m
ba
r]
Portata impianto [l/h]
Prevalenza residua disponibile all'impianto circolatori UPM3 ZB 15-50 e FLEX AS 5m
[codd. 20087320 e 20091499 - 20091500/1/2 imposta
ti
a 5 m]
Flow rate (l/h)
Residual
head
(mbar)
PMW
pump
modulation area
setted to
4-metre circulator
graphic 4
0
50
100
150
200
250
300
350
400
0
100
200
300
400
500
600
700
800
900
1000
Flow rate (l/h)
Residual
head
(mbar)
PMW
pump
modulation area
