The ratiotherm central controller rZR-V4 has been developed based on the UVR-1611; it features great operational reliability due to its manual 0 automatic switch.
Even if the controller completely fails, the user is able to continue operating the heating system.
When retrofitting the control system, the existing cables up to 2.5 mm² can be reused. This is enabled by the spring-loaded terminals attached to the special circuit board.
A plug-in extension module ensures that a number of heating hydraulic units can be dealt with without any trouble.
- Operation Instructions