Room thermostat, AC 230 V, for fan coil units and universal applications, 7-day time switch, vertical

Stock no. S55770-T159

Stock no. S55770-T159

  • Operating modes: Auto timer, Comfort, Energy Saving and Protection

  • Auto Timer mode with 8 programmable timers

  • 2-position, 3-position or PWM control outputs

  • Automatic or manual fan speed for 1-speed or 3-speed fan

  • 3 multifunctional inputs for keycard contact, external room / return air temperature (QAH11.1, QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact

  • Automatic or manual heating / cooling changeover

  • Adjustable commissioning and control parameters

  • Minimum and maximum setpoint limitation

  • Infrared remote control receiver

  • Backlit display

  • Auto timer can be disabled (RDG100T/H)

Application selectable:

  • 2-pipe system

  • 2-pipe system with electrical heater

  • 2-pipe system and radiator / floor heating

  • 4-pipe system

  • 4-pipe system with electrical heater

  • 2-stage heating or cooling system



Operating voltage

AC 230 V


50/60 Hz

Power consumption

8 VA / 1 W

Positioning signal

2-position, PWM, 3-position

Control algorithm

2-point / PI

Ambient temperature, operation

0...50 °C

Setpoint setting range

5…40 °C

Measuring range, temperature

0…49 °C

Switching differential

Heating: 0.5…6 K
Cooling: 0.5…6 K

Analog inputs

External room / return air temperature, Heat / Cool changeover, Operation mode changeover, Window contact on/off, Dewpoint monitor, Electrical heater enabled

Analog inputs, number


Analog input, signal

NTC 3k , Switch

Digital inputs, number


Relay outputs

Fan: 1- or 3-speed

Relay outputs, number


Relay output, switching voltage

AC 230 V

Relay output, switching current

5 (4) A

Triac outputs

Valve, el. heater, 2-position, PWM, 3-position

Triac outputs, number


Triac output, switching voltage

AC 230 V

Triac output, switching current

Max. 1 A

Mounting position

Wall mounting


Wall mounting with screws

Type of fixing

Wall mounting with screws

Degree of protection


Dimensions (W x H x D)

93 x 128 x 30.8 mm