Bedienungsanleitung Siemens RVP201 (Seite 24 von 46) (Englisch)

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Siemens Heating controllers RVP201 and RVP211 CE1P2464en

Building Technologies 3 Technical design 12.12.2007

3.6 Frost protection for the plant and the building

3.6.1 Frost protection for the plant

Frost protection for the plant provides protection against freezing by activating the heat-

ing circuit pump, if controller and heat generating equipment are ready to operate

(mains voltage present).

Frost protection for the plant can be provided with or without an outside sensor. The

switching differential is 1 K (fixed value).

Frost protection is always active, even if the control is switched off (operating modes

and

), with quick setback, and with Off through ECO.

If desired, frost protection for the plant can be deactivated with the coding switch “Frost

protection”.

Frost protection for the plant is accomplished in two steps:

1. If the outside temperature falls to 1.5 °C, the heating circuit pump will be activated

for 10 minutes at 6-hour intervals.

2. If the outside temperature falls to –5 °C, the heating circuit pump will be activated

and runs continuously.

The frost protection stage active at a time will be switched off when the outside tempera-

ture has exceeded the limit value by an amount equal to the switching differential of 1 K.

Frost protection for the plant is accomplished in two steps:

If the flow temperature falls to 10 °C, the heating circuit pump will be actuated

for 10 minutes at 6-hour intervals.

If the flow temperature falls to 5 °C, the heating circuit pump will be actuated

and runs continuously.

The frost protection stage active at a time will be switched off when the flow temperature

has exceeded the limit value by an amount equal to the switching differential of 1 K.

3.6.2 Frost protection for the building

Frost protection for the building protects the rooms from excessively low temperatures.

It acts in all operating modes as a minimum limitation of the room temperature. It can

be achieved with or without room unit, provided the heating curve slope is correctly set.

The frost protection for the building is given higher priority over the ECO automatic

energy saver. If desired, frost protection for the building can be deactivated with the

coding switch “Frost protection”.

• Without room unit:

− Attenuated outside temperature ≤ 5 °C: the control is switched on and the flow

temperature is controlled such that a room temperature of 5 °C will be maintained

− Attenuated outside temperature >6 °C: the control is switched off

• With room unit and with quick setback active:

− Room temperature ≤ 5 °C: the control is switched on and the flow temperature is

controlled such that a room temperature of 5 °C will be maintained

− Room temperature >6 °C: the control is switched off

• With room unit, but without quick setback:

− Same as without room unit

With outside sensor

Without outside sensor

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