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Idiomas disponibles
TWO WAY operation
No temperature or pressure safety
devices (which may not be discon-
nected) are incorporated in the sys-
tem as these are considered to be
part of the supply requirements.
No particular types of approval stand-
ards are required or planned.
CIRCUIT BALANCING
For proper and optimal system oper-
ation and for a higher distribution
yield, the hydraulic circuits must be
correctly balanced. The entry into
force of the recent European direc-
tives on the use of high efficiency
pumps has promoted the use of vari-
1200
1100
Pos. 1
1000
900
800
700
600
500
400
300
200
100
0
0
200
able flow pumps, making the fixed
speed pumps obsolete.
The variable flow pump is ideal in sys-
tems designed with two-way meter
cases. However, it is also possible
for certain applications to move from
TWO WAY to THREE WAY by acting
on the FCV by-pass, closing/opening
the path.
Balancing TWO-WAY systems:
To begin adjusting, first set the maxi-
mum speed of the pump.
With a screwdriver turn the manual
limit
valve (1) until you reach the
design flow rate, reading it on the
heat counter.
BY-PASS FLOW
Pos. 2
Pos. 3
400
600
800
1000 1200 1400 1600 1800 2000
FLOW (l/h)
THREE WAY operation
By-pass balancing THREE-WAY
systems:
Once you have balanced the heating
circuit, as for the TWO WAY system,
use the chart below As input data use
the design flow rate and load loss.
The intersection between the two val-
ues represents the take off point in
which the by-pass has to operate,
therefore with a screwdriver bring
the adjusting screw (2) to the position
corresponding to the take off point
identified.
Eg: with 1000 l/h and 350 mbar, the
take off point falls within "Pos.4".
Pos. 4
Fig. 11
Pos. 0
Pos. 1
Pos. 2
Pos. 3
Pos. 4
Fig. 12
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