Siemens RAA Series Betriebsanleitung

Siemens Industry, Inc.

RAA Series

Technical Instructions

Document No. 155-519P25

ET RAA-1

March 2, 2007

Room Thermostats

RAA20…

Description Two-wire, gas diaphragm-based room thermostats for use in heating and/or cooling

only (two-pipe) systems.

Features •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…)

Product Numbers See Table 1.

Accessory ARG70 Wall box adapter

Application 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

Technical Instructions RAA Series Room Thermostats

Document Number 155-519P25

March 2, 2007

Page 2Siemens Industry, Inc.

Table 1. Product Numbers.

Mounting Style Product

Number Control Switch Scale

Electrical Wall

Box (with wall

box adapter)

RAA10CW Heating only or cooling only None Celsius (concealed)

RAA20UW Heating only or cooling only None Fahrenheit and Celsius

Drywall1RAA10C Heating only or cooling only None Celsius (concealed)

RAA20U Heating only or cooling only None Fahrenheit and Celsius

Operation 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

contact is closed.

Adjustments 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

WARNING:

Personal injury, or loss of life may occur if

you do not perform a procedure as specified.

CAUTION:

Equipment damage, or loss of data may

occur if you do not follow a procedure as

specified.

Specifications 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

RAA Series Room Thermostats Technical Instructions

Document Number 155-519P25

March 2, 2007

Siemens Industry, Inc. Page 3

Ambient Conditions

Operation

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

Material Plastic

Enclosure rating NEMA1

Bellows Environmentally-friendly gas

Wiring

Screw terminals for wires of 2 × 16 AWG

or 1 × 14 AWG

minimum 20 AWG

Agency Certification

Conforms to CE requirements

UL listed to 873 (E35918)

cUL listed to Canadian standard

C22.2 No. 24-93

Table 2. Control Valves.

Part Number Description Technical Instructions

SFA71U 24V NC

155-321P25

SFA11U 120V NC

SFA208U/25 208V NC

SFA277U/25 277V NC

STA71 24V NC 155-709

599 Series Zone

Valves Two-way

Three-way 155-320P25

Technical Instructions RAA Series Room Thermostats

Document Number 155-519P25

March 2, 2007

Page 4Siemens Industry, Inc.

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 personnel only.

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.

Setpoint Limit Stops

Adjustment 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.

Installation

Required Tools

•Small, flat-blade screwdriver

•1/4-inch drill bit

•Drill motor

•Small mallet

•Pencil

RAA Series Room Thermostats Technical Instructions

Document Number 155-519P25

March 2, 2007

Siemens Industry, Inc. Page 5

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 wall.

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.

The installation is now complete.

Technical Instructions RAA Series Room Thermostats

Document Number 155-519P25

March 2, 2007

Page 6Siemens Industry, Inc.

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 adapter is included with electrical wall 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 Steps 10 through 16.

The installation is now complete.

Figure 3. 4 × 4-inch Electrical Wall Box Installation.

1 Electrical wall box

2 Plaster ring

3 Wall box adapter *

4 Adapter mask *

* Included with ARG70

5 Sub-base

6 Thermostat base

7 Thermostat cover

RAA Series Room Thermostats Technical Instructions

Document Number 155-519P25

March 2, 2007

Siemens Industry, Inc. Page 7

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 adapter is included with electrical wall 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 Steps 10 through 16.

The installation is now complete.

Figure 4. 2 × 4-inch Electrical Wall Box Installation.

1 Electrical wall box

3 Wall box adapter *

4 Adapter mask *

* Included with ARG70

5 Sub-base

6 Thermostat base

7 Thermostat cover

Technical Instructions RAA Series Room Thermostats

Document Number 155-519P25

March 2, 2007

Page 8Siemens Industry, Inc.

Maintenance The room thermostat is completely maintenance-free. If inoperable, replace entire unit.

WARNING:

High voltage. Disconnect power before servicing. Metal part is not

grounded.

Wiring Diagrams

Heating Mode

Cooling Mode

D1 Heating device

D2 Cooling device

L Operating voltage

N Neutral

N1 Room thermostat

T Thermal switch

W Heating control output

Y Cooling control output

Figure 5. RAA10…and RAA20… Wiring.

Operating Diagrams

Heating Mode

Cooling Mode

T Room temperature

SD Switching differential

SP Room temperature

setpoint

W Heating output signal

Y Cooling output signal

Figure 6. RAA10… and RAA20 Operating.

Dimensions

Dimensions in inches

(millimeters)

Figure 7. RAA10… Unit.

RAA Series Room Thermostats Technical Instructions

Document Number 155-519P25

March 2, 2007

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.

Siemens Industry, Inc.

Building Technologies Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089

+ 1 847-215-1000

Your feedback is important to us. If you have

comments about this document, please send them

toSBT_technical.edit[email protected]

Document No. 155-519P25

Printed in the USA

Page 9

Dimensions,

Continued

Dimensions in inches

(millimeters)

Figure 8. RAA20… Unit.

Figure 9. Base Plate.

Figure 10. ARG70.

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