Bedienungsanleitung Siemens RDG160 (Seite 17 von 60) (Englisch)

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Siemens RDG100, RDG100T, RDG110, RDG140, RDG160 Basic Documentation CE1P3181en

Building Technologies Functions 19 Jun 2009

The changeover sensor ensures changeover from heating to cooling mode based

on the acquired water temperature. We recommend activating the purge function

(parameter P50) with 2-port valves. This function ensures correct acquisition of the

medium temperature even if the 2-port valve is closed for an extended period of

time. The valve is then opened for 1 to 5 minutes (adjustable) at 2-hour intervals

during off hours.

The purge function (parameter P50) must be disabled if the thermostat is used in

compressor-based applications.

In very warm and humid climates, the fan can be run periodically or continuously at

a low fan speed (e.g. in empty apartments or shops) in Energy Saving mode by

setting parameter P61, in order to avoid damage from moisture due to lack of air

circulation. See also section 4.9 “Fan control”, under “Fan kick function”.

Limit the on/of

f switching cycle to protect the compressor and reduce wear and

tear. The minimum output on-time and off-time for 2-position control output can be

adjusted from 1 to 20 minutes via parameters P48 and P49.

The factory setting is 1 minute.

Readjusting the setpoint or heating / cooling mode changeover immediately results

in calculation of the output status; output Y11/Y21 may not hold the minimum 1-

minute on/off time.

If parameter P48 or P49 is set to above 1 minute, the minimum on/off time for the

control output is maintained as set, even if the setpoint or changeover mode is

readjusted.

This function is only available for on/off control with RDG100, RDG100T and

RDG110.

All heating sequences can also be used for floor heating.

You can use fan coil heating / cooling sequences for floor heating or cooling by

disabling the fan via parameter P52.

The temperature should be limited for 2 reasons: comfort and protection of the

floor.

The floor temperature sensor, connected to multifunctional input X1 or X2, acquires

the floor temperature. If the temperature exceeds the parameterized limit (parame-

ter P51), the heating valve is fully closed until the floor temperature drops to a level

2 K below the parameterized limit.

This function is factory-set to OFF (disabled).

Input X1 or X2 must be commissioned accordingly (P38 or P40 = 1).

See section 4.10 “Multifunctional input”.

Living roo

ms:

Up to 26 °C for long-term presence, up to 28 °C for short-time presence.

Bath rooms:

Up to 28 °C for long-term presence, up to 30 °C for short-time presence.

Purge function

Caution

Avoid damage from

moisture

Minimum output

on-time / off-time

Floor heating /

Floor cooling

Floor temperature

limitation function

Recommended values

for P51:

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