Siemens RAB20 Series Technical Instructions

ET RAB-2 March 2, 2007 Two-pipe Fan Coil Room Thermostat with Automatic Changeover RAB20.1 Description Two-wire, gas diaphragm-based fan coil room thermostat for heating or cooling systems with two-pipe fan coil applications. Features • • • • • • • • Automatic changeover Manual, thre ...

Document Number 155-526P25 March 2, 2007 Page 2 Siemens Building Technologies, Inc. Operation Heating Mode If the room temperature falls below the selected setpoint, the heating contact is closed. Cooling Mode If the room temperature rises over the selected setpoint, the cooling contact is ...

Technical Instructions Document Number 155-526P25 March 2, 2007 Siemens Building Technologies, Inc. Page 3 Warning/Caution Notations WARNING: Personal injury, or loss of life may occur if you do not perform a procedure as specified. Specifications Operating voltage 24 to 120 Vac, 277 Vac Frequency 50/60 Hz Setpo ...

Document Number 155-526P25 March 2, 2007 Page 4 Siemens Building Technologies, 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 i ...

Technical Instructions Document Number 155-526P25 March 2, 2007 Siemens Building Technologies, 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 thermo ...

Document Number 155-526P25 March 2, 2007 Page 6 Siemens Building Technologies, Inc. 4 × 4-inch Electrical Wall Box Mounting An ARG70 wall plate adapter (provided with electrical wall box mount models) is required to mount an RAB… thermostat to a 4 × 4-inch electrical wall box. 1. Loose ...

Technical Instructions Document Number 155-526P25 March 2, 2007 Siemens Building Technologies, Inc. Page 7 2 × 4-inch Electrical Wall Box Mounting An ARG70 wall plate adapter (provided with electrical wall box mount models) is required to mount an RAB… thermostat to a 2 × 4-inch electrical wall box. 1. Loose ...

Document Number 155-526P25 March 2, 2007 Page 8 Siemens Building Technologies, 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. Diagrams N L M1 AS N ...

Technical Instructions Document Number 155-526P25 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. Other product or company names mentioned herein may be the tradema ...