Use And Care Manual

Construction details
Supply manifold
663 series
Supply manifold has manual
balancing valves for regulating flow
delivered to system circuits. The
balancing is accomplished by turning
a hex wrench into the balancing valve
in each supply outlet.
The chart on page 7 shows the
number of turns for reaching the
desired value of flow and Δp.
663 and TwistFlow 668S1 series
Return manifold
The return manifold is equipped
with manual shut-off valves (1)
which are used to shut off the flow
to individual circuits.
They can also be used with a
thermo-electric actuator which,
when used with a room
thermostat, maintains the room
temperature at the set limits when
thermal load varies. The stem (2)
is made of polished stainless steel
to minimize friction and prevent
the formation of harmful corrosion.
The control device upper part
features a double EPDM O-ring
seal (3) - (4) on the sliding stem.
The valve (5) is made of EPDM and
is molded to optimize the hydronic
characteristics of the valve and
minimize noise as the fluid passes
through and as it gradually opens
and closes when operating with a
thermo-electric actuator.
TwistFlow 668S1 series
Supply manifold
The supply manifold is equipped
with flow meters and built-in flow
rate balancing valves.
Acting on the regulating valve with
the special cone-shaped valve
plug (1), the flow rate to the single
circuits can be accurately adjusted
to the required value, just by
reading the value on the single flow
meter with a scale of 1/4 - 2 gpm
(2). This simplifies and speeds up
the operation of circuit calibration,
with no need for reference graphs.
After adjustment, the valve can be
locked open by means of its
tamper-proof cover (3), which also
acts as a knob for adjusting the
flow rate.
This valve makes it possible to seal
off the single circuit, should this be
necessary.
Exterior shape of the manifolds and mounting brackets
The exterior of the manifold deserves special mention because it
can be cast in any shape to meet any requirements.
In the example shown below, indentations have been created in the
manifold to correspond to the plastic pipes exiting from the upper
manifold, thus partially accommodating the pipes and reducing
their overall thickness. This does not interfere with the pressure loss
values because the sections with the indentations (a) are equal to
the sections in which the pipes are branched (b) and (c) and where
the regulating parts (micrometric regulating and shut-off valve)
obstruct the passage of the fluid.
The partial accommodation of the pipes in the indentations created
in the manifold is further enhanced by the angle of the mounting
brackets, which are slanted to create a 1” (25 mm) offset between
the upper and lower manifolds.
As shown in the figure below, this offset positions the pipes so that
they perfectly match the profile of the manifold during installation.
End fitting and automatic air vent valve
The end fitting consists of a fill/drain cock (1)
and an automatic air vent valve with a
hygroscopic safety cap (2). It has been
specifically designed to close the air vent valve
automatically if there is water near the vent
itself.
BAGNO
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
HOBBY WC
SOGGIORNO
CAMERA
CALEFFI
BAGNOHOBBY WC
SOGGIORNO
CAMERA
CALEFF
CALEFF I
CALEFF I
1” (25 mm)
2
1
CALEF F I
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