Electric Thermostats

Two-point control algorithm for on/off control

24 to120, 277 Vac line

Two mounting styles: electrical wall box or dry wall

Dual Fahrenheit/Celsius scale (RAA20U)

Fan Speed Switch (RAB90.1U) for remote switching location (24 to 120, 277 Vac)

Two-point control algorithm for on/off control

Line voltage 2-pipe or 4-pipe fan coil applications

3-speed fan control

Fan on only for ventilation

Manual or external changeover

Two mounting styles:  electrical wall box or drywall

Adjustable upper/lower limit stops

Dual Fahrenheit/Celsius scale

Output for on/off valve actuator

Output for three-speed fan

Dual setpoint temperature scale

Control depending on the room or return air temperature

Automatic Heating/Cooling changeover

Operating modes:  Normal, Energy Saving, Frost Protection and Off

Operating mode changeover input for remote control

Selectable control parameters

0 to 10Vdc output for heating or cooling (RCU50U and RCU50.2U)

ON/OFF or PWM outputs for heating and cooling (RCU15U)

Control depending on room or return air temperature (RCU15U)

Automatic heating/cooling changeover (RCU15U and RCU50U)

Manual heating/cooling changeover (RCU50.2U)

Operating modes: Normal, Energy Saving, Freeze Protection and Standby (RCU15U and RCU50U)

Operating modes: Normal and OFF (RCU50.2U)

Active 0 to10Vdc input for setpoint shifting (RCU50U)

Operating mode changeover input for remote control (RCU50U)

Adjustable minimum limitation for cooling output (RCU50U)

Operating voltage 24 Vac

Automatic heat/cool changeover

Automatic day/night setpoint changeover via external contact

Room temperature control through modulating control of valve or damper actuators with selectable operating action of control signals for heating only, cooling only, or heating and cooling in sequence

Relay input for fan, pump or other controls

Minimum limitation of the supply air temperature

Outputs are independently selectable directacting (DA) or reverse acting (RA)

Adjustable proportional band

Liquid Crystal Display(LCD)

Modulating Proportional+Integral (P+I) control

Control depending on room or remote air temperature

Output for a 0 to10 Vdc actuator (RDU50U and RDU50.2U)

Output for a floating (floating) or on/off output actuator (RDU20U)

Adjustable actuator runtime (RDU20U)

Automatic heating/cooling changeover (RDU20U and RDU50U)

Manual heating/cooling changeover (RDU50.2U)

Operating modes: Normal, Energy Savingand 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, 24Vac

Outputs for one-stage compressor and reversing valve or on/off valve actuators

Output for auxiliary electric heating

Output for a one-speed fan

Room or return air temperature control

Manual heating/cooling changeover

Operating modes: Normal (heating, cooling), EnergySaving, Off

Operating mode changeover input for remote control

Selectable installation and control parameters

Operating voltage, 24Vac

Liquid Crystal Display(LCD)

Output for an on/off valve actuator

Output for an on/off valve actuator and an electric heater

Modulating PI control

Output for a 0 to 10 Vdc valve actuator

Modulating PI control

Output for a floating valve actuator

Outputs for a three-speed fan

Control depending on the room or the return air temperature

Automatic heating/cooling changeover

Continuous heating or cooling mode

Operating modes: Normal, Economy and Standby

Operating mode changeover input for remote control (Day/Night)

Air movement control function for avoiding damage resulting from moisture

Selectable installation and control parameters

Display of room temperature or setpoint (selectable)

Electronic minimum and maximum setpoint limits

Operating voltage 24Vac