Basic Documentation

Overview
Types
2
A6V12166490_en--_c
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2 Overview
2.1 Types
Product
no.
Stock no.
Operating
voltage
Control outputs
Fan types
Time
progra
m
Backlit
LCD
Infrared
receiver
1)
Suitable
conduit
box
Color
On/Off
3-pos
DC 0...10 V
3-
speed
DC 0...10 V
RDF660T
S55770-
T434
AC 230 V
✓
✓
-
-
✓
✓
✓
✓
Square or
round
White
1)
Order infrared remote control separately
2.2 Functions
Applications
Room temperature control in individual rooms and zones:
● Heated or cooled with 2-pipe fan coil units
● Heated or cooled with 2-pipe fan coil units with electrical heater
● Heated and cooled with 4-pipe fan coil units
The room thermostat controls:
● One ECM fan
● One or two on/off valve actuators
● One on/off valve actuator and one 1-stage electric heater
● One 3-position valve actuator
● One 1-stage compressor with electric heater
Used in systems with:
● Heating or cooling
● Automatic heating/cooling changeover
● Manual heating/cooling changeover
● Heating and cooling (e.g. 4-pipe system)
● Maintain room temperature via built-in temperature sensor or external room
temperature/return air temperature sensor
● Automatic or manual changeover between heating and cooling
● Select application via DIP switches
● Select operating mode via operating mode button on the thermostat
● ECM fan control (automatic or manual)
● Display current room temperature or setpoint in °C and/or °F
● Minimum and maximum setpoint limitation
● Key lock (automatic and manual)
● 2 multifunctional inputs, freely selectable for:
– External room temperature sensor or return air temperature sensor (AI)
– Automatic heating/cooling changeover sensor (AI)
– Window contact (DI)
– Dew point sensor (DI)
– Electrical heater enabled (DI)
– Fault input (DI)
– Monitor input (DI)
Use
Functions