Siemens raa20 series User Manual
CE1N3002en
25.02.2008
Building Technologies
3
002
RAA20 RAA200
Room thermostats RAA20..
Adjustable for heating only or cooling only
• 2-position control
• Switching voltage AC 24…250 V
Use
The RAA20.. room thermostat is used in heating only or cooling only systems to maintain the selected room temperature.
Typical use:
• Residential buildings
• Light industrial buildings
In conjunction with
• zone valves or thermal valves
• gas or oil burners
• fans
• pumps
Functions
The RAA20.. 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.
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Siemens Room Thermostat RAA20 CE1N3002en
Building Technologies 25.02.2008
Y
T[°C]
ON
OFF
W
SD
3010D01
Y
T[°C]
ON
OFF
SD
3010D02
T Room temperature
SD Switching differential
w Room temperature
setpoint
Y1 Output signal "Heating"
Y2 Output signal "Cooling"
Type summary
Functionality Product no. (ASN)
Room thermostat for heating or cooling mode
Switching voltage AC 24...250 V
RAA20
Room thermostat for heating or cooling mode with large dial
(large temperature setting knob) and color scale
Switching voltage AC 24...250 V
RAA200
Equipment combinations
Description Product no. (ASN) Data sheet
Motoric on / off actuator
SFA21...
4863
Thermal actuator (for radiator valves)
STA21...
4893
Thermal actuator (for small valves 2.5 mm)
STP21...
4878
Accessories
Description Product no. (ASN)
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 x 130 mm ARG70.2
Technical design
Key features of the RAA20.. room thermostat:
• 2-position control
• Gas-filled diaphragm
Adjustments
The required temperature setpoint is selected with the setting knob on the front of the
thermostat.
The setpoint setting range can be mechanically limited by means of setpoint limiters
under the unit cover.
Function diagrams
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