47
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Bypass Adjustment (Parag. 1.32).
e appliance leaves the factory with the bypass open.
If necessary, the by-pass can be regulated to system requirements from minimum (by-pass closed) to maximum (by-pass open).
Adjust using a at head screwdriver, turn clockwise and open the by-pass, anticlockwise it is closed.
e bypass ensures minimum circulation of the water in the appliance and its correct operation if the systems are divided into
more than one zone.
Total head available to the system.
v6
v9
v9
A
B
C
D
X1
Y1 Y2
36
Key (Fig. 36):
X1 = Flow rate (l/h)
Y1 = Head (kPa)
Y2 = Circulator pump absorbed power (W)
A+B = Head available with by-pass closed
B = Head available with by-pass open
C+D = Power absorbed by the pump with by-pass open (dotted area)
D = Power absorbed by the pump with by-pass closed (dotted
area)
Speed (Fig. 36):
v6 = Speed 6
v9 = Speed 9
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