www.usa.siemens.com/hvaccomponents
Thermostats
A-59
Description
The RDU Series Room Controller with LCD is designed for
2-pipe heating and cooling systems.
Features
•
Liquid crystal display
•
Modulating Propor Integral (P+I) control
•
Control depending on room or remote air temperature
•
Output for a 0 to 10 Vdc actuator (RDU50U and
RDU50.2U)
•
Output for a
fl
oating (3-position) or on/off output
actuator (RDU20U)
•
Adjustable actuator run time (RDU20U)
•
Automatic heating/cooling changeover (RDU20U
and RDU50U)
•
Manual heating/cooling changeover (RDU50.2U)
•
Operating modes: Normal, Energy Saving and Off
(RDU20U and RDU50U)
•
Operating mode changeover input for day/night
remote control
•
Selectable installation and control parameters
•
Adjustable minimum limitation for cooling output
(RDU50U)
•
Optional selectable Direct Acting or Reverse Acting
output (RDU50U and RDU50.2U)
•
Selectable display of room temperature or setpoint
• Fahrenheit or Celsius selectable display
• Minimum and maximum setpoint limitation
• Operating voltage, 24 Vac
Applications
The RDU…Series of Room Temperature Controllers are
used for individual room temperature control in heating or
cooling HVAC applications.
RDU50.2U Room
Temperature Controller.
RDU20U/RDU50U Room
Temperature Controller.
Room Temperature Controllers
with LCD for Heating
and Cooling Systems
RDU...
