Climate control > Clock thermostats > OpenTherm > RAMSES 816 top2 OT

RAMSES 816 top2 OT


  • Digital mixer control
  • 3 different weekly programs
  • 3 comfort and 2 reduced temperatures can be allocated to each zone
  • INFO button for the most important data
  • Party/ECO program
  • Chimney sweeping function with push button OT box
  • Minimum boiler temperature can be set
  • 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
  • Control of feed temperature via motorcontrolled mixer
  • 3-point controller with feed sensor
  • Pump protection function
  • Inputs: feed sensor heating circuit (contained in set), external sensor
  • 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

2 x 2 (1) A Relay, 1 x 1 (1) A Relay:

Setting range temperature +6 °C … +30 °C
Setting range frost protection +6 °C … +15 °C
Flow temperature limit +40 °C … +90 °C
Type of connection 2-way conductor (BUS) room controller
Program Weekly program, Daily program
Number of memory locations 42
Switching hysteresis 2 – 20 K
Mixer runtime 2 – 10 min
Suitable for SELV No
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

Connection example

RAMSES 816 top2 OT
RAMSES 816 top2 OT

Scale drawings

RAMSES 816 top2 OT


Article number Data sheet Documents basket
External temperature sensor - Type of protection IP 65

External temperature sensor

Temperature sensor RAMSES IP 65 - External room temperature sensor

Temperature sensor RAMSES IP 65

Plunge sensor RAMSES - Additionally required for applications with domestic water control or boiler plunge sensor

Plunge sensor RAMSES



Format Download
Operating instructions PDF
RAMSES 816 top2 OT - Digital mixer control

RAMSES 816 top2 OT

Article number 8169132
Data sheet
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