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nrglex-scm

The NRG-LEX SYSTEM CONTROL MODULE eliminates the tedious and complex wiring tasks associated with a modern central heating system. The module links all the electrical components in a simple and efficient way.

FEATURES

4 temperature control zones, each with time and temperature control inputs as well as LED indicators, which can control a circulation pump or motorised valve.

2 boiler control systems (linked to the 4 temperature control zones), each with 3A power supply and volt-free switch contacts, to switch power supply to boiler(s).

2 auxiliary relays, activated by any of 4 inputs, and each with normally-open and normally-closed contacts.

1 frost thermostat input to activate boiler relays when the ambient temperature gets dangerously low.

 

BOILER RELAY FUNCTION

When mains (230V) is supplied to the stat switched input terminal (See wiring diagram overleaf) in one or more of control zones A, B, C or D, the boiler relay is enabled, closing the Boiler1 and Boiler2 contacts. The mains/live supply to the boiler(s) can be switched through these contacts.

 

AUXILIARY RELAY FUNCTION

When mains (230V) is provided to any of the four Auxiliary Inputs 21, 22, 23 & 24 the two volt-free Auxiliary Relay contacts 15, 16, 17 and 18, 19, 20 are switched. See wiring diagram overleaf

 

FROST THERMOSTAT FUNCTION

When mains (230V) is supplied to the live terminal 9 of the Frost Input the boiler relay is enabled, closing the Boiler1 and Boiler2 contacts.

 

PRIORITISE SOLID FUEL OVER CONVENTIONAL OIL OR GAS BOILER

This unit has the ability to prioritise a solid fuel input through temperature control and can keep an oil or gas boiler from firing up automatically in the process, utilising energy efficiently.

 

SPECIFICATIONS

Operating Voltage                   230V AC 50HZ

Temperature Control Zones      4

Circulating pump supplies         4 (1 per zone)

Boiler Power Supply                 5 amps (2 boilers)

Boiler Control relays                 2

Aux. relay contacts (NO & NC)  2

Auxiliary inputs                        4

Frost input                              1

Enclosure rating                      IP20