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Verfügbare Sprachen
Verfügbare Sprachen
EN
8.2 Limiting the maximum
adjustable temperature
To limit the adjustment of the head knob till a certain
high temperature, proceed as follows:
1 Remove the red pin.
2 Set the desired temperature.
(e.g. 20 °C pos. 3).
3 Find the black dot i located between position 5 and
0 (Fig. I).
4 Push through the pin into the first hole on the
left of the black dot. (Fig. L).
black dot
5
5
9
Fig. I
Fig. L
Once the operation is completed the head knob
cannot be set on temperature higher than 3.
EN
Inconvenient
Radiator does not cool off.
Solution
• Check if thermostatic head has been properly in-
stalled.
• Check that no foreign objects (dirt particle, a.s.o.)
have been entering on the thermostatic valve seat.
To verify it, take out the thermostat head from valve,
and check if the rod of thermostatic shutter moves
freely or is blocked. In case it is blocked the full in-
sert thermostatic shutter has to be dismantled and
replaced. Same procedure applies if the gasket of
the themostatic valve has been damaged by foreign
objects.
• Check if pressure differential is too high: differentials
higher than 1 bar could bring the valve shutter to an open
position and cause the valve to leak.
Inconvenient
Noise or jamming.
Solution
• Check that inlet and outlet connection have not been
inverted.
• Check that heating system is provided with overpres-
sure valve (of differential by-pass).
• Check that overpressure valves is correctly in-
stalled and correctly set, valve differential pres-
sure higher than 0.3 bar can cause noise when in
throttling condition.
• Check that pump capacity is adequate to the sys-
tem (not too high).
EN
Straight and square valves DN10 and DN 15
1000
-1 K
Kv=0,31
-2 K
Kv=0,55
MAX Kv=1,17
100
10
10
100
Q [ℓ/h]
8.3 Locking of a fixed temperature
If you desire to set a temperature on the knob please
insert the locks in the spaces to the right and to the
left of the black point after setting the required
temperature (see 8.1 and 8.2)
Once the operation is completed the head knob does
not rotate anymore.
9
Anti-freeze position
NB
In zero position "0" (closed) there is danger of freez-
ing. With the thermal expansion valve you have the
possibility of protecting the housing from freezing
and damage, even in your absence. Naturally, the
heating system is supposed to be in function.
• Set the knob so that the freezing symbol (
responds to the reference pointer.
In this case, the desired temperature set up on the
thermal expansion valve corresponds to a temper-
ature of 7 °C.
10 Aeration of the rooms
When you air the rooms, turn the knob to be anti-
freeze position ( ). In this way you avoid dispersing
the heat. You will also avoid overheating the rooms
after having reclosed the window.
13 Technical specification
Max operating pressure
Max differential operating pressure 0,3 bar*
Max ambient temperature
Max system water temperature
Storage temperature
Regulation range
Nominal lift
Antifreeze intervention
Nominal flow rate straight and angle valve 175 l/h
Response time
* Pressure differentials greater than 0.3 bar at the ends
of the valve could cause noise in lamination conditions.
14 Diagram Δ as a function of flow rate qm
(see page 106)
1000
EN
11 Maintenance
Head does not need any maintenance.
The elimination of any difficulty must be done by a com-
petent technical, following the thermostatic valve as-
sembly instructions.
12 Troubleshooting
Inconvenient
Radiator is not warming up.
Solution
• Check if radiator has been vented (air bled off).
• Check if the heating system is correctly functioning.
• Check if the distance X between the seat of the body
) cor-
Inconvenient
Desired environment temperature is not reached.
Solution
• Check the inlet water temperature in heating sys-
• Check the radiant surface is correctly proportioned
• Check if pump pressure head in heating systems
• Check if radiator or thermostatic head are covered
EN
Full valve transformation
thermostatic
10 bar
40 °C
100 °C
to -10 from 50 °C
7 ÷ 28 °C
0,22 mm/K
7 °C
25 minuti
EN
EN
valve and the edge of the metal rod, with valve close
(rod pushed), correspond to 11,8 mm (see Fig. A) .
tem is adequate.
to room dimensions.
is adequate.
by heavy curtains, or located into recessed posi-
tions or covered by radiator covers.
EN
EN
Key
tube
Ø 19
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