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Siemens 

RDD100.1DHW   Room thermostat with independent DHW control 

CB1N1421en_01 

Building Technologies 

 

2013-03-14 

Equipment combinations 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 

Mechanical design 

The room thermostat consists of 2 parts: 

  Plastic housing which accommodates the electronics, the operating elements 

and the room temperature sensor 

  Mounting plate with screw terminals 

The housing engages in the mounting plate and is secured with a screw. 
 
 

 

1)  Operating mode touchkey  

2)  Touchkey for increasing a value 

3)  Touchkey for decreasing a value 

 

4)  DHW switch On/Off touchkey 

 

Description 

Product No. 

Data Sheet 

Electromotoric actuator  

 

SFA21.. 

4863 

Electrothermal actuator 
(for radiator valves) 

 

STA23.. 

4884 

Electrothermal actuator 
(for small valves 2.5 mm)

 

STP23.. 

4884 

Damper actuator 

 

GDB.. 

4634 

Damper actuator 

 

GSD.. 

4603 

Damper actuator  

 

GQD.. 

4604 

Rotary damper actuator 

GXD.. 

4622 

Operation and settings  

Summary of Contents for RDD100.1 DHW

Page 1: ... Off control of DHW Comfort Economy and Protection mode Adjustable commissioning and control parameters Battery powered DC 3 V 2 x 1 5 V AAA Use The RDD100 1DHW is used to control the room temperature in heating systems with independent control of DHW Typical applications Apartments For the control of the following plant components and of DHW Thermal valves or zone valves Gas or oil boilers Fans P...

Page 2: ...ol parameters Independent DHW Temperature control The unit acquires the room temperature with its built in sensor and maintains the setpoint by delivering control commands The switching differential is 1 K Q14 T C ON OFF W SD 1421D01 T Room temperature SD Switching differential W Room temperature setpoint Q14 Output signal for heating Type summary Product No Stock No Features RDD100 1DHW S55770 T2...

Page 3: ...h screw terminals The housing engages in the mounting plate and is secured with a screw 1 Operating mode touchkey 2 Touchkey for increasing a value 3 Touchkey for decreasing a value 4 DHW switch On Off touchkey Description Product No Data Sheet Electromotoric actuator SFA21 4863 Electrothermal actuator for radiator valves STA23 4884 Electrothermal actuator for small valves 2 5 mm STP23 4884 Damper...

Page 4: ...ption 1 Indicating that batteries need to be replaced 6 F Room temperature in degrees Fahrenheit 2 Protection mode protection mode symbol can be enabled via parameter settings 7 Touchkey lock activated 3 Comfort mode 8 C Room temperature in degrees Celsius 4 Economy mode 9 Heating On 5 Display of room temperature setpoint etc 10 DHW On 11 Current room temperature Display ...

Page 5: ...h all LCD segments flash indicating that reset was made correctly After the reset the ther mostat is ready for commissioning by qualified HVAC personnel The control parameters of the thermostat can be set to ensure optimum perform ance of the entire system Please refer to Operating Instructions CB1B1421 sec tion Do you want to change parameters If the temperature on the display does not agree with...

Page 6: ...erature falls below 5 ºC the unit automatically activates the heating out put The symbol appears only if the icon is enabled via parameter settings When this DHW function is activated symbol appears on LCD Maintenance notes The thermostats are maintenance free Disposal In terms of disposal the room thermostats are classified as electronic scrap con forming to the European Directive 2011 65 EU WEEE...

Page 7: ...ity As per IEC 60721 3 3 Class 3K5 0 50 C 95 r h Transport Climatic conditions Temperature Humidity Mechanical conditions As per IEC 60721 3 2 Class 2K3 25 60 C 95 r h Class 2M2 Storage Climatic conditions Temperature Humidity As per IEC 60721 3 1 Class 1K3 25 60 C 95 r h conformity to EMC directive Low voltage directive 2004 108 EC 2006 95 EC C Tick conformity to EMC emission standard AS NSZ 4251...

Page 8: ... N1 M1 Y2 1421S02 T T DHW Room thermostat with direct control of a gas fired wall hung boiler with inde pendent control of DHW Room thermostat with direct control of a gas fired floor standing boiler with in dependent control of DHW T N1 Y1 1421S03 M1 DHW F1 Thermal reset limit thermostat F2 Safety limit thermostat M1 Circulating pump N1 RDD100 1DHW room thermostat Y1 Mixing 3 port valve with manu...

Page 9: ...127 21 5 83 5 4 1 7 1 0 5 Ø80 Ø60 1421M01 Remarks Heating Because of the unavoidable self heating effects of the electrical current any loads of more than 3 Amperes connected to the unit can influence the control behavior and temperature accuracy in a negative way All dimensions in mm 2013 Siemens Switzerland Ltd Subject to change ...

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