Siemens RAA11 Room Thermostat
Tamperproof for heating only or cooling only Two-position control Switching voltage AC 24…250 V
Use
The RAA11 room thermostat is used in heating-only or cooling-only systems to maintain the selected room temperature where tamperproof housing is needed.
Typical use:
- Schools
- Public buildings
- Storage rooms
- Maintenance rooms
Functions
The RAA11 room thermostat has separate outputs for heating only and cooling only. If the room temperature falls below the selected setpoint, the heating contact will close. If the room temperature exceeds the selected setpoint, the cooling contact will close.
Function diagrams
Equipment combinations
| Type of unit | Type reference | Data sheet*) |
| Motoric on/off actuator | SFA21… | 4863 |
| Thermal actuator (for radiator valve) | STA21… | 4893 |
| Thermal actuator (for small valve 2,5 mm) | STP21… | 4878 |
The documents can be downloaded from http://siemens.com/bt/download
Accessories
| Description | Type reference |
| Adapter plate 120 x 120 mm for 4“ x 4“ conduit boxes | ARG70 |
| Adapter plate 96 x 120 mm for 2“ x 4“ conduit boxes | ARG70.1 |
| Adapter plate for surface wiring 112×130 mm | ARG70.2 |
Technical design
Key features of the RAA11 room thermostat:
- Two-position control
- Gas-filled diaphragm
- No external adjustment facility
Notes
Mounting, installation, and commissioning
The thermostat should be located where the air temperature can be sensed as accurately as possible, without getting adversely affected by direct solar radiation or other heat or refrigeration sources. The mounting height is about 1.5 m above the floor.
The unit can be fitted to the most commercially available recessed conduit boxes or directly on the wall.
AC 250 V
Only authorized personnel may open the unit to perform service. The unit must be isolated from the main supply before opening. When installing the unit, fix the baseplate first, then hook on the thermostat body and make the electrical connections. Then fit the cover and secure it also refer to separate mounting instructions. The thermostat must be mounted on a flat wall. The local electrical regulations must be complied with. If there are thermostatic radiator valves in the reference room, set them to their fully open position.
Warning!
No internal line protection for supply lines to external consumers (Y1, Y2) Risk of fire and injury due to short circuits!
- Adapt the line diameters as per local regulations to the rated value of the installed overcurrent protection device.
Maintenance Mechanical design
The room thermostat is maintenance-free. The diaphragm is filled with environmentally friendly gas. The thermostat housing is made of plastic
Ordering
| Type (ASN) | Part number (SSN) | Description |
| RAA11 | S55770-T219 | Room thermostat RAA11 |
Disposal
The devices are considered electronic devices for disposal in terms European
Directive 2012/19/EU and may not be disposed of as domestic waste.
- Dispose of the device via the channels provided for this purpose.
- Comply with all local and currently applicable laws and regulations.
Technical data
|
Power supply |
Switching capacity Voltage
Current Frequency |
AC 24…250 V 0.2…6(2.5) A 50 or 60 Hz |
| No internal fuse
External preliminary protection with max. C 10 A circuit breaker in the supply line required under all circumstances |
||
| Screw terminals for | 2 x 1.5 mm2 (min. 0.5 mm2 ) | |
| Operational data | Switching differential SD | £1K |
| Setpoint setting range | 8…30 °C | |
| Environmental conditions | Operation
Climatic conditions Temperature Humidity Pollution degree |
to IEC 60721-3-3
Class 3K5 0…+50 °C <95 % r.h. normal, to EN 60730-1 |
| Transport / Storage Climatic conditions Temperature Humidity
Mechanical conditions |
to IEC 60721-3-2
Class 2K3/1K3 -20…+50 °C <95 % r.h. Class 2M2 |
|
| Industry standards | EU conformity (CE) | 8000064801*) |
| UK conformity (UKCA) | A5W00209372A*) | |
| RCM conformity | CE1T3561en_C1*) | |
| Environmental Compatibility | The product environmental declaration CE1E3561*) contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal). | |
| Safety standard
Degree of protection of housing |
II to EN 60730-1 IP30 to EN 60529 | |
| Weight | 0.14 kg | |
| Colour | white, NCS S 0502-G (RAL 9003) | |
The documents can be downloaded from http://siemens.com/bt/download.
Connection diagrams
Dimensions
Remarks
Heating:
Because of the unavoidable self-heating effects of the electrical current, loads of more than 3 Amperes connected to the unit can influence the control behavior and temperature accuracy negatively.
Cooling:
Because of the unavoidable self-heating effects of the electrical current, loads of more than 1 Amperes connected to the unit can influence the control behavior and temperature accuracy negatively.
© 2011 – 2023 Siemens Switzerland Ltd Room Thermostats RAA11
Reference
Download Manual:
Siemens RAA11 Room Thermostat Product SPECIFICATION GUIDE
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