Stuhl SF220, clock thermostat, 24Vac

Description

Description: Clock thermostat SF220
The SF220 clock thermostat has the following functions:
Regulating room temperature by means of an internal temperature sensor.
Controlling the room temperature by means of an external temperature sensor, which measures the floor temperature and considers this as a control purpose.
Room that controls temperature via an internal temperature sensor. The floor temperature is measured via the external temperature sensor and then serves as the maximum temperature monitoring of the floor heating.
A pilot function, as a control unit for other thermostats, which do not have a clock. (eg TV20) time controlled reduced in temperature.
Party button / more overtime timer, for example for 1, .2, .3, .4 hours delaying the temperature decrease
Energy saving button, the temperature is lowered to the next switching time. This button also allows the thermostat to remain in the lowered position for a longer period of time (simple holiday control).
A time program with 32 individual switching times, which can be spread over the week according to your own needs. A program is entered ex factory, which can be changed by the user according to his own wishes and wishes.
A holiday program that keeps the room constantly at the chosen room temperature for a selected period of time.
Automatic summer / winter time, clock changeover.
Automatic recognition of the year that automatically recognizes the days.
The optimization (to switch off), of previous heatings, calculations, of previous heatings, ensure that the room temperature is reached at the desired time.
Locking the keypad of the chronothermostat
Power reserve of up to four hours in case of power failure. During this phase, time and the calendar remain intact. The adjusted parameters and programming remain up to 10 years.
LED Display for easy recognition of an energy requirement.
Detection of interruptions and short-circuits at the external sensor.

Technical data:

Type SF220
The temperature setting +5 … + 30 ° C (Comfort / Reduced
temperature)
+5 … + 15 ° C (Frost protection)
+25 … + 55 ° C (high demarcation–
temperature)
+5 … + 35 ° C (lower demarcation–
temperature)
Change per 0.5 K.
Sensor tolerance ± 1K
Temp.-Switch differential ± 0.1 … ± 1.3 K, adjustable
Magnification 0.1 K.
Sensor Semiconductor (KTY)
internal or external
or internal and external
(external sensor is extra delivery)
Time function The electronic clock with week clock
Automatic summer / winter switch
Timings 32, random times over the week
Time steps 10 min
Power reserve min. 4 hours
Operating voltage 24V AC (20V… 30V AC), 50Hz
Power approx. 1 W.
Switching output Triac with 24V control contact
Max. permissible
switching current only for Ohm charge
0.8A, 24V AC, (cos j = 1)
(max. 5 thermal motors)
Reduced temperature Triac with 24V control contact Max. permissible
Current on contact 0.5 A, 24V AC, (cos j = 1) (max. 10 controllers)
Minimum cyclic duration 20sec to 500sec
(control output)
applicable Magnification 10sec
Electro connections screw terminals for (0.5 … 2.5 mm²)
Method 1.C (no limitation effect)
Measured voltage 4.0 kV
Degree of pollution 2
Ambient temperature 0 … + 40 ° C
Housing material: upper part ABS
(impact resistant, flame retardant)
bottom PA6 GF30
Size 81 x 81 x 16 (36) mm
Mounting on flush-mounted box or on optional surface-mounted frame
Cable entry via flush-mounted box
Enclosure IP 30
Protected II according to EN 60730
Weight 120gr