Master V.3 PLUS / EU-i-3 PLUS Open Therm heating control for 3 heating circuits, mixed and unmixed
The PLUS version with extended functions (see below). The new eModul allows full access to all setting parameters.
A modern and energy-efficient house requires multiple alternative heat sources. But to be able to speak of real savings,
a unified system for their management is necessary. The heating system control units from MASTER
enable powerful and efficient control of a system with multiple heat sources (e.g., solar collectors and central heating boilers).
This integration reduces energy consumption. The use of control units in the system facilitates the
operation of all devices, saves time and money, and ensures comprehensive heating comfort.
The latest version now also supports OpenTherm (OT).
OpenTherm (OT for short) is a protocol developed for controlling central heating systems via room temperature controllers (room thermostats). OpenTherm is a "point-to-point" communication, where the thermostat is usually the "master" and the heat generator is the "slave". Using multi-point-to-point, multiple devices can be connected to each other.
OpenTherm is manufacturer-independent. A controller from manufacturer A can communicate with a heating system from manufacturer B.
Between the thermostat (master) and the heating system (slave), a digital, bidirectional data exchange takes place. Sending status reports and requesting information between the two devices is possible. However, the most common command relates to the regulation of the boiler temperature. When the heating system receives the setpoint temperature request, it begins to modulate (increase or reduce the heating output) in order to reach and maintain the setpoint temperature. The room thermostat constantly recalculates the boiler temperature to keep the room temperature at the setpoint. This leads to higher energy efficiency.
Special features:
- continuous control of three mixing valves
- control of the DHW pump
- supports a solar system
- return temperature protection
- weather and weekly control
- inexpensive from solar-more
- two configured potential-free outputs
- two configured voltage outputs
- two configurable 0-10V outputs (PLUS VERSION)
- solar pump output with PWM signal (PLUS VERSION)
- cascade control of 4 heat generators (PLUS VERSION)
- communication with three two-point room thermostats
- communication with a room thermostat with RS communication
- extension of an EU-505 or EU-WIFI-RS module
- control of two additional valves using additional modules EU-I-1-M, EU-I-1, EU-i-1 WW
- program version update via a USB port
- OpenTherm (OT)
Technical data:
- Boiler temperature setting range - from 10 to 99°C
- Floor temperature setting range - from 10 to 50°C
- Hot water temperature setting range - from 5 to 80°C
- Mains voltage 230V / 50Hz
- Rated load of outputs 0.5A
- Fuse 6.3A
- Temperature resistance of sensors - from -30 to 99°C
Equipment
- LCD display
- Boiler temperature sensor
- Flow temperature sensor
- Return temperature sensor
- Solar sensor
- Outdoor sensor
- Wall mounting
- Sensors of type KTY 81-210 with a diameter of 5 mm are used here
Scope of delivery:
- EU-i-3 PLUS controller
- 5 sensors in total + 1 outdoor sensor
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