Publicité
Les langues disponibles
Les langues disponibles
Description of thermal regulation behaviour:
The thermal regulation behaviour of the circulation valve is de-
scribed in chart 1.
Residual volume of
flow according
to VP 554
Chart 1
With the water temperature rising during thermal disinfection
phase about 6K above the set control temperature, the Oven-
trop valve "Aquastrom T plus" installed in a circulation riser
automatically regulates from a minimum volume of flow to a
higher flow value. When reaching a temperature of approx.
73°C, the increased flow is limited to the minimum volume of
flow again. As a result, a higher differential pressure is
reached in the corresponding riser and thermal disinfection in
the succeeding risers is accelerated. These pipes thus reach
the required disinfection temperature faster than pipes which
are not supported hydraulically during disinfection phase.
This hydronic support helps to reduce the disinfection phase
in a circulation system and energy is saved as a result. When
disinfection is completed and the water temperature drops,
the valve "Aquastrom T plus" returns to normal operation and
the temperature is limited to the set nominal value.
Chart 2
Ajustable control
range 40 °C – 65 °C
Recommended control
range 55 °C – 60 °C
Valve limits the volume of
flow derived from the
nominal temperature
to a residual volume of flow
Presetting 6
Presetting 5
Presetting 4
Presetting 3
Presetting 2
Presetting 1
Set nominal
temperature
During normal operation (temperature range up to 60°C), the
circulation valve limits the volume of flow derived from the
nominal temperature to a residual volume of flow.
Disinfection
range > 70 °C
Valves opens about 6°C
after having reached
the minimum
residual volume of flow
Limitation of the volume of flow:
The maximum volume of flow (which is situated in the tempera -
ture range before the set nominal temperature) can be limited
with the help of the circulation valve "Aquastrom T plus". This
allows the hydronic balance of the circulation pipes especially
in case of an important drop in temperature, e.g. in case of
boiler breakdown or in case of too high a water consumption.
The volume of flow is limited within the preset flow range by
the temperature regulation according to the regulation
characteristics shown in chart 2. The flow values and the
corresponding presetting values can be taken from chart 3 on
page 17.
Temperature water [°C]
Disinfection
volume of flow
Temperature water [°C]
Having reached
approx. 73°C, valve
limits to residual volume
of flow again
7
Publicité
