Siemens RDG160KN Manuel de service télécharger pdf (Page 16)

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Siemens RDG100…/RDG110…/RDG140.../RDG160… Basic Documentation CE1P3076.en

Building Technologies Functions 19 Jun 2009

The RDG1xx.. can also be used on universal applications, e.g. fan coil-based

cooling and floor heating, or chilled ceiling and electrical heater, etc.

For more detailed information, refer to subsection 4.7.9 ff.

4.6 Additional features

The water temperature acquired by the changeover sensor (QAH11.1 + ARG86.3)

is used to change over from heating to cooling mode, or vice versa. When the

water temperature is above 28 °C (parameter P37), the thermostat changes over to

heating mode, and to cooling mode when below 16 °C (parameter P36).

If the water temperature is between the 2 changeover points immediately after

power-up, the thermostat starts in heating mode.

The water temperature is acquired at 30-second intervals and the operating state is

updated accordingly.

[°C]

M Operating mode

Cooling mode

Water temperature

Heating mode

The QAH11.1 cable temperature sensor for automatic heating / cooling changeover

can be replaced by an external switch for manual, remote changeover:

3076Z03

QAH11.1

T °C

Contact open  heating mode

Contact closed  cooling mode

The sensor or switch can be connected to input terminal X2 (factory setting) or X1

or D1 (switch only), depending on the commissioning of the inputs (P38, P40, P42).

See also section 4.10 “Multifunctional input”.

The thermost

at acquires the room temperature via built-in sensor, external room

temperature sensor (QAA32), or external return air temperature sensor (QAH11.1)

connected to multifunctional input X1 or X2.

Inputs X1 or X2 must be commissioned accordingly. See section 4.10 “Multi-

func

tional input”.

1) Heat pump application covered by RDG110

(SPDT = relay with NO and NC contact)

2) With ECM fan control DC 0…10 V

Key Y1 Heating or heating/cooling valve actuator M1 1-speed or 3-speed fan

Y2 Cooling valve actuator B1 Return air temperature sensor or external

room temperature sensor (optional)

E1 Electrical heater B2 Changeover sensor (optional)

Note The diagrams above only show the water-based fan coil applications, but not the compressor

Universal applications

Automatic heating /

cooling changeover

Remote heating /

cooling changeover

External / return air

temperature sensor

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Siemens RDG160KN Manuel de service Page 16

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