Siemens RAB 21
Code: NC-28906Related products
Product detailed description
Thermostat Siemens RAB 21
Room thermostat for a 2-pipe fan coil unit with a 3-speed fan and automatic external switching option.
- Room thermostat for heating or cooling
- switching function (via an external automatic Aquastat switch)
- 2-position control
- Manual switching of 3 fan speeds
- Switching voltage 250 V ~
- ON/OFF control output
The RAB 21 room thermostat ... is used to control the room temperature.
Typical areas of use:
- commercial buildings
- residential buildings
- light industrial buildings
Frequently Asked Questions
- How exactly does a manual (simple) thermostat work? It measures the temperature at its installation location, and when it drops below the set value, it closes a contact that switches on the heat source (boiler, pump, radiator) – once the set temperature is reached, the contact opens again. Unlike programmable thermostats, it has no weekly or daily schedule – the temperature is set manually using a rotary or sliding control.
- Where should the thermostat be placed? In a location that best represents the typical room temperature – away from direct sunlight, drafts, radiators, or other heat/cold sources that could distort the reading.
- Must installation be done by an electrician? Connecting the thermostat to the heating source's electrical circuit should be carried out by a person with electrical qualifications, since it involves work on the wiring and load switching.
Additional parameters
| Category: | fan-coil controls |
|---|---|
| Warranty: | 2 years |
| Weight: | 0.15 kg |
| Switched Voltage: | 250 V |
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