The NRG Lex System Control Module eliminated the tedious and complex wiring tasks associated with a modern central heating system. The module links all electrical components together in a simple and efficient way.
The control module can by default manage 4 independent time and temperature controlled zones. When a zone’s clock and thermostat tells it to turn on, the control module will tell the boiler(s) to turn on, and it will turn on a circulation pump or turn a motorized valve.
There are two boiler control systems in the NRG Lex, each with a 3A fuse and a volt-free switch. There are also two auxiliary relays, each with normally-open (NO) and normally-closed(NC) contacts. The auxiliary relays can be used for many different functions. One of these functions is to interconnect an open and a sealed system using the NRG Link. When doing this the NRG Lex is able to prioritize a solid fuel input, keeping the oil or gas boiler from firing if the stove is supplying enough heat to the system. This will save energy and reduce CO2 emissions if the stove runs on biomass (wood).
Another function on the NRG Lex is the frost thermostat input. The purpose of this function is to turn on the boilers if the ambient temperature gets dangerously low to prevent any damage to the system. The frost thermostat input can also be used to join multiple boards for projects with 5 or more zones.