Climate control > Clock thermostats > OpenTherm > RAMSES 856 top2 OT

RAMSES 856 top2 OT

Description
Technical data
Connection example
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Description

Digital heating control for time-dependent monitoring and control of room temperature
Open Therm heating controller for 2 or 3 point control, weather-dependent, service water and circulation control
Automatic sensor recognition for weather- or room-dependent control; can be switched manually at any time
3 different weekly programs
3 comfort and 2 reduced temperatures can be allocated to each phase
INFO button for the most important data
Additional switching program for domestic hot water utilisation times
Adjustable service water storage temperature, programmable legionella protection
Party/ECO program
Chimney sweeping function with push button OT box
Minimum boiler temperature can be set
2 heating curves can be set for 2 heating circuits
2-stage burner control option
Holiday program with reduced temperature or date-controlled heating phase can be programmed e. g. for holiday homes
USB interface for modem
Automatic summer/winter time adjustment
Boiler/feed temperature (control circuit 1) controlled by switching the burner
Control of feed temperature (control circuit 2) via pump control or motor-controlled mixer
3-point controller with feed sensor
Time- and temperature-dependent control of hot water circulation pump.
Pump protection function
Inputs: External sensor (contained in set), feed sensor heating circuit (contained in set), contact or immersion sensor for domestic hot water, contact sensor for circulation
Elapsed-time counter for recording relay switching times e.g. burner operating time
Adjustable reminder function for heater maintenance

Technical data

Operating voltage	230 V AC
Frequency	50 Hz
Type of contact	NO contact
Installation type	Wall installation
Switching capacity	5 x 5 (1) A Relay, 2 x 1 (1) A Relay:
Setting range temperature	+6 掳C聽鈥β�+30 掳C
Setting range frost protection	+6 掳C聽鈥β�+15 掳C
Flow temperature limit	+40 掳C聽鈥β�+90 掳C
Type of connection	2-way conductor (BUS) room controller
Program	Weekly program, Daily program
Number of memory locations	42 , max. 24 per program
Switching hysteresis	2聽鈥撀�20 K
Mixer runtime	2聽鈥撀�10 min
Suitable for SELV	No
Control types	2 or 3 point
Mode of operation	Type 1 B as per EN 60730-1
Power reserve	4 hours
Stand-by consumption	~1,1 W
Type of protection	IP 20
Protection class	II according to EN 60 730-1