RCU50U and RCU50.2U
Technical Instructions
Document No. 155-327P25
Rev. 1, March, 2002
Room Temperature Controllers for
CAV Systems
RCU50U
RCU50.2U
Siemens Building Technologies, Inc.
Description
The RCU microprocessor controlled CAV room controller is designed for air only, or air
and water heating and/or cooling systems. Controllers have proportional response.
Features
•
Modulating P-control
•
0 to 10 Vdc output for heating or cooling
•
Automatic heating/cooling changeover (RCU50U)
•
Manual heating/cooling changeover (RCU50.2U)
•
Operating modes: Normal, Energy Saving, Frost Protection and Standby (RCU50U)
•
Operating modes: Normal and OFF (RCU50.2U)
•
Active 0 to 10 Vdc input for set point shifting (RCU50U)
•
Operating mode changeover input for remote control (RCU50U)
•
Adjustable minimum limitation for cooling output (RCU50U)
•
Operating voltage 24 Vac
Application
Controlling individual room temperature in HVAC installations that are heated or cooled.
Controlling these types of equipment:
•
Valve actuators
•
Air damper actuators
Product Numbers
Table 1.
Product Numbers
Features
RCU50U
Without operating mode selector
RCU50.2U
With manual heating/cooling changeover switch
NOTE:
To order without logo, change suffix to "/U/NL". Example: RCU50/U/NL.
