Siemens RAB31 User Manual
Building Technologies
3
01
7
Use
RAB 31 RAB31.1
Room Thermostats RAB31..
For four-pipe fan coils
· Room thermostat with manual switch for heating or cooling
· Two-position control
· Manual three-speed fan switch
· Switching voltage AC 24…250 V
· Control output ON/OFF
The room RAB31.. thermostat is used in heating or cooling systems to maintain the
selected room temperature.
Typical use:
· Commercial buildings
· Residential buildings
· Light industrial buildings
CE1N3017en
2015-01-07
In conjunction with
- zone valves
- thermal valves
- fans
Functions
Heating
Cooling
Fan speed
Ventilation
Changeover
Function diagrams
If the room temperature falls below the selected setpoint, the heating contact will close.
If the room temperature exceeds the selected setpoint, the cooling contact will close.
There are two possibilities to control the fan speed:
a) Manually by means of the three - speed fan switch on the thermostat for continuous
operation
b) Automatically by switching to the selected fan speed via the thermostat for
controlled operation. In that case – prior to commissioning – the jumper positions
corresponding to the thermostat function must be selected. There are two choices of
jumper positions available on printed circuit board:
SR1
Auto
SR2
heating valve, depending on the switch position.
When the ventilation function
Selected fan speed as continuous operation
Fan is switched at the same time as the cooling or
is selected (RAB31.1) on the cover by setting the slide
switch, the heating and cooling contacts are always open and the fan operates at the
selected speed.
Heating or cooling is selected with a switch located on the front of the thermostat.
Heating Cooling
T Room temperature
SD Switching differential
W Room temperature
setpoint
Y1 Valve output signal
"Heating"
Y2 Valve output signal
"Cooling"
Type summary
Equipment combinations
Four-pipe fan coil room thermostat for use with 3-speed fan, manual
RAB31
changeover
Four-pipe fan coil room thermostat for use with 3-speed fan, manual
RAB31.1
changeover and ventilation function
Type of unit Type reference Data sheet
Motoric on/off actuator SFA21.. 4863
Thermal actuator (for radiator valve) STA21.. 4893
Thermal actuator (for small valve 2,5 mm) STP21.. 4878
Electromotoric actuator for zone valve VVI46..
(2 position on / off)
*)
The documents can be downloaded from http://siemens.com/bt/download
SUA21.. 4830
.
*)
2/6
Siemen s Room Th erm ostats RAB31.. CE1N3017en
Building Technologies 2015-01-07
Loading...