Siemens RDG100 User Manual

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Siemens RDG100, RDG100T, RDG110, RDG140, RDG160 Basic Documentation CE1P3181en
Building Technologies Functions 14 Dec 2011
The RDG1xx.. can also be used on universal applications, e.g. fan coil-based
cooling and floor heating, or chilled ceiling and electric 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 (adjustable via parameter P37),
the thermostat changes over to heating mode.
It stays in heating mode until the temperature falls below 16°C (adjustable
viaparameter P36)
 When the water temperature is below 16 °C (P36), the thermostat changes
over to cooling mode.
It stays in cooling mode until the temperature rises above 28°C (P37).
 If the water temperature is between the 2 changeover points immediately after
power-up (inside the hysteresis), the thermostat starts in previous mode.
The water temperature is acquired at 30-second intervals and the operating state is
updated accordingly.
P36
M
T
w
[°C]
P37
3191D124
M Operating mode
Cooling mode
T
w
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
X2
M
T
X2
M
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”.
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 Electric 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

Siemens RDG100 Specifications

General

Brand	Siemens
Model	RDG100
Category	Thermostat
Language	English