RAA Series
Technical Instructions
Room Thermostats
RAA20…
Description
Document No. 155-519P25
ET RAA-1
March 2, 2007
Two-wire, gas diaphragm-based room thermostats for use in heating and/or cooling
only (two-pipe) systems.
Features
Product Numbers
Accessory
Application
• Two-point control algorithm (on-off)
• 24 to 120 Vac, 277 Vac operating voltage
• Two mounting styles: electrical wall box or drywall
• Wall plate adapter (ARG70) included with electrical wall box mount styles
• Dual setpoint temperature scale (RAA20..) or tamperproof (concealed) setpoint
(RAA10…)
See Table 1.
ARG70 Wall box adapter
Typically used in:
• Schools
• Public buildings
• Storage rooms
• Maintenance rooms
• Temporary heat for building construction
Used in commercial and light industrial buildings in conjunction with:
• Zone valves
• Gas, fuel burners
• Fans
• Pumps
Siemens Industry, Inc.
Technical Instructions RAA Series Room Thermostats
contact is closed.
WARNING:
CAUTION:
Document Number 155-519P25
March 2, 2007
Table 1. Product Numbers.
Mounting Style Product
Number
Electrical Wall
Box (with wall
box adapter)
Drywall1 RAA10C Heating only or cooling only None Celsius (concealed)
RAA20U Heating only or cooling only None Fahrenheit and Celsius
Operation
Adjustments
RAA10CW Heating only or cooling only None Celsius (concealed)
RAA20UW Heating only or cooling only None Fahrenheit and Celsius
The room thermostat is based on a two-wire, gas membrane technology.
When the room temperature falls below the selected setpoint, the thermostat closes the
heating contact. If the room temperature is over the selected setpoint, the cooling
A rotating setpoint adjuster inside the thermostat can select the required temperature.
• RAA10… No adjustments can be made outside the thermostat. The cover must be
removed to adjust setpoint.
• RAA20… High and low setpoint limit stops can be engaged to limit temperature
range.
Warning/Caution Notations
Control Switch Scale
Personal injury, or loss of life may occur if
you do not perform a procedure as specified.
Specifications
Equipment damage, or loss of data may
occur if you do not follow a procedure as
specified.
Operating voltage 24 to 120 Vac, 277 Vac
Frequency 50/60 Hz
Setpoint adjustment range 50°F to 85°F (10°C to 30°C)
Setpoint limit stops are adjustable (except RAA10…)
Switching differential (SD) <1.8°F (1°C), fixed
Switch rating 6A RES, 3.5A FLA, 12A LRA
Switch action Single-Pole, Double-Throw (SPDT )
Output Two-position (On/Off)
Weight 5 oz. (0.14 kg)
Dimensions
RAA10… 3.80 × 3.92 × 1.42 inches
(96.4 × 99.6 × 36 mm)
RAA20… 3.80 × 3.92 × 1.68 inches
(96.4 × 99.6 × 42.8 mm)
Color Ivory white
Page 2 Siemens Industry, Inc.
RAA Series Room Thermostats Technical Instructions
Operation
Material Plastic
Screw terminals for wires of 2 × 16 AWG
Conforms to CE requirements
Document Number 155-519P25
March 2, 2007
Ambient Conditions
Temperature 32°F to 122°F (0°C to 50°C)
Relative humidity <95%
Transport/Storage
Temperature –4°F to 122°F (–20°C to 50°C)
Relative humidity <95%
Housing
Wiring
Agency Certification
SFA71U 24V NC
SFA11U 120V NC
SFA208U/25 208V NC
SFA277U/25 277V NC
STA71 24V NC 155-709
599 Series Zone
Valves
Enclosure rating NEMA1
Bellows Environmentally-f riend l y gas
or 1 × 14 AWG
minimum 20 AWG
UL listed to 873 (E35918)
cUL listed to Canadian standard
C22.2 No. 24-93
Table 2. Control Valves.
Part Number Description Technical Instructions
155-321P25
Two-way
Three-way
155-320P25
Siemens Industry, Inc. Page 3
Technical Instructions RAA Series Room Thermostats
Document Number 155-519P25
March 2, 2007
Mounting
Locate the unit where the air temperature can be sensed as accurately as possible. Do
not mount in direct sunlight or near other heat or refrigeration sources.
Mounting height is approximately 60 inches (1.5 m) above the floor.
The unit can be fitted to most commercially available recessed conduit boxes or directly
on the wall.
Figure 1. Recommended Mounting Locations.
(Dimensions in Inches)
WARNING:
1. This unit can be installed by authorized personn el on l y.
Setpoint Limit Stops
Adjustment
Installation
Required Tools
2. The unit must be de-energized and the operating voltage
checked before opening.
• An ARG70 wall plate adapter (provided with electrical wall box mount models) must
be used to mount to a 2 × 4-inch or 4 × 4-inch electrical wall box.
• An ARG70 wall plate adapter must be used to meet UL and cUL requirements.
• The thermostat must be mounted on a flat wall.
• All local electrical regulations must be complied with.
• If there are radiator valves in the room, set them to their fully open position.
To set limit stops, remove gray tabs located on the setpoint knob and position high and
low stops around the perimeter of knob as required. Each position on the setpoint dial is
1.8°F.
• Small, flat-blade screwdriver
• 1/4-inch drill bit
• Drill motor
• Small mallet
• Pencil
Page 4 Siemens Industry, Inc.
RAA Series Room Thermostats Technical Instructions
The installation is now complete.
Document Number 155-519P25
March 2, 2007
Drywall Mounting
1. Loosen the two screws at the bottom of thermostat.
2. Lift the bottom of the thermostat cover from the thermostat base and push up to
remove cover.
3. Remove sub-base from back of thermostat.
4. Using the sub-base (packed with thermostat) as a template, mark the hole locations
with a pencil.
5. Drill two 1/4-inch diameter holes for plastic wall anchors (provided).
6. Using a mallet, tap in the plastic wall anchors flush with wa ll.
7. Pull the wiring through the opening in the upper portion of the sub-base.
8. Level the mounting plate.
9. Using the two wood screws provided, fasten sub-base to wall. Thermostat is not
position sensitive.
10. Pull the wiring through the thermostat housing.
11. Position thermostat housing over the two mounting lugs located at the top of the
sub-base, and press down on cover until bottom lugs snap in place.
12. Terminate wires per wiring instructions on the inside of thermostat cover.
Optional: To set limit stops, remove gray tabs located on the setpoint knob and
position high and low stops around perimeter of knob as required. See Figure 2.
Figure 2. Setpoint Limit Stops.
13. Insert the top of the thermostat cover into the slots located on the top of the
thermostat and press down.
14. Tighten the two screws at the bottom of the thermostat.
Siemens Industry, Inc. Page 5
Technical Instructions RAA Series Room Thermostats
The installation is now complete.
Figure 3. 4 × 4-inch Electrical Wall Box Installation.
Document Number 155-519P25
March 2, 2007
4 × 4-inch Electrical Wall
Box Mounting
An ARG70 wall plate adapter is required to mount an RAA… thermostat to a 4 × 4-inch
electrical wall box. The ARG70 wall plate ada pter is inc lude d with electr ica l wal l box
mount models.
1. Loosen the two screws at the bottom of thermostat.
2. Lift the bottom of the thermostat cover from the thermostat base and push up to
remove cover.
3. Using the four screws provided, fasten wall box adapter (3) to plaster ring (2),
supplied by others.
4. Pull wires through plaster ring (2).
5. Flex adapter mask (4) and snap in place inside wall box adapter (3).
6. Fasten sub-base (5), included with thermostat, to wall box adapter assembly (3)
and (4) with one No. 4-24 × 5/8-inch long screw (provided with the thermostat) at
the bottom only.
7. Pull wires through the sub-base (5).
8. Clip thermostat base (6) at the top of the sub-base and snap the bottom in place.
9. Level the thermostat base and fasten at the top with a No. 4-24 × 5/8-inch long
screw.
10. Follow Drywall Mounting St eps 10 through 16.
1 Electrical wall box
2 Plaster ring
3 Wall box adapter *
4 Adapter mask *
* Included with ARG70
Page 6 Siemens Industry, Inc.
5 Sub-base
6 Thermostat base
7 Thermostat cover
RAA Series Room Thermostats Technical Instructions
The installation is now complete.
Figure 4. 2 × 4-inch Electrical Wall Box Installation.
* Included with ARG70
Document Number 155-519P25
March 2, 2007
2 × 4-inch Electrical Wall
Box Mounting
An ARG70 wall plate adapter is required to mount an RAA… thermostat to a 2 × 4-inch
electrical wall box. The ARG70 wall plate ada pter is inc lude d with electr ica l wal l box
mount models.
1. Loosen the two screws at the bottom of thermostat.
2. Lift the bottom of the thermostat cover from the thermostat base and push up to
remove cover.
3. Using the two screws provided, fasten wall box adapter (3) to plaster ring (2),
supplied by others.
4. Pull wires through plaster ring (2).
5. Flex adapter mask (4) and snap in place inside wall box adapter (3).
6. Fasten sub-base (5), included with thermostat, to wall box adapter assembly (3)
and (4) with one No. 4-24 × 5/8-inch long screw (provided with the thermostat)
at the bottom only.
7. Pull wires through the sub-base (5).
8. Clip thermostat base (6) at the top of the sub-base and snap the bottom in
place.
9. Level the thermostat base and fasten at the top with a No. 4-24 × 5/8-inch long
screw.
10. Follow Drywall Mounting St eps 10 through 16.
1 Electrical wall box
3 Wall box adapter *
4 Adapter mask *
Siemens Industry, Inc. Page 7
5 Sub-base
6 Thermostat base
7 Thermostat cover
Technical Instructions RAA Series Room Thermostats
Wiring Diagrams
D1 Heating device
Figure 5. RAA10…and RAA20… Wiring.
Document Number 155-519P25
March 2, 2007
Maintenance
Operating Diagrams
The room thermostat is completely maintenance-free. If inoperable, replace entire unit.
WARNING:
High voltage. Disconnect power before servicing. Metal part is not
grounded.
D2 Cooling device
L Operating voltage
N Neutral
N1 Room thermostat
T Thermal switch
W Heating control output
Y Cooling control output
T Room temperature
SD Switching differential
Heating Mode
Cooling Mode
Dimensions
Dimensions in inches
(millimeters)
Heating Mode
SP Room temperature
setpoint
W Heating output signal
Cooling Mode
Figure 6. RAA10… and RAA20 Operating.
Figure 7. RAA10… Unit.
Y Cooling output signal
Page 8 Siemens Industry, Inc.
RAA Series Room Thermostats Technical Instructions
Siemens Indus try, Inc.
+ 1 847-215-1000
Figure 9. Base Plate.
Figure 10. ARG70.
Document Number 155-519P25
March 2, 2007
Dimensions,
Continued
Dimensions in inches
(millimeters)
Figure 8. RAA20… Unit.
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners.
© 2007 Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
Your feedback is important to us. If you have
comments about this document, please send them
toSBT_technical.editor.us.sbt@siemens.com
Document No. 155-519P25
Printed in the USA
Page 9
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