4000 series boiler management

Cascade/multi boiler control options

4000 series modular, digital boiler control units secure the safe function of the boilers and follow for the optimum control of the heating system to maximise efficiency. The 4121 comes supplied with a MEC2 digital programmer with clear text display which provides external weather compensated heating control, perfect for maximising the condensing efficiency of the boilers. The 4122 control unit can house the FM 456/457 cascade control module which controls the sequencing of the boilers within the cascade. All additional control modules as listed on the following page, can also be integrated with the 4122 system.

4121 control unit

The 4121 can control two heating (one mixed/one unmixed) circuits and DHW and has space to allow the connection of additional module.

4122 control unit (with/without MEC2)

This can be used as an extension to the 4121 or as a stand alone controller and has space to allow the connection of two additional modules.

MEC2

The MEC2 digital programmer is supplied with the 4121/4122 controls. Its simple ‘press and turn’ operation makes setting and changing heating options easy. A plain text display allows input of system operations and communicates boiler diagnostics. they can be fitted directly to the main control unit or wired tot he boiler from the living or working space (as room thermostat).

BFU Room Termostat

The BFU is a remote control which allows the temperature to be adjusted from the living or working space. it is supplied with a room temperature sensor, and works in conjunction with 4121/FM442.

FM441 heating and DHW control module

For use in 4000 series controls this module controls one mixed heating circuit (with circulation pump and mixing valve) and one DHW circuit (with cylinder load and circulation pump). Includes manual controls to switch circuits between on/off/automatic. It comes supplied with 9mm DHW temperature sensor. All wiring has colour coded plugs for quick installation into the main control unit (BFU as accessory). (Not for use with 4121).

FM442 heating circuit control module

For use in 4000 series controls this module controls up to two mixed heating circuits (with circulation pump and mixing valve). Includes manual controls to switch circuits between on/off/automatic. it comes supplied with one FV/FZ temperature sensor.

All wiring has colour coded lugs for quick installation into the main control unit (BFU up to 2x as accessory). An additional FV/FZ sensor is required if using with two mixed circuits.

FM443 solar module

The intelligent FM443 solar module allows optimum solar and heating functionality. With this fully integrated Energy Management System the boiler recognises the solar output and delays firing the boiler for as long as possible by continuously monitoring changes in heat demand. This not only reduces the wear and tear on the heating system, by reducing burner start ups, by up to 24%, but can also provide an additional 10% of energy savings.

FM456 and FM457 cascade control module

The FM456 and FM457 can control the modulation and sequencing strategy from 2 to 4 boilers, and can control one additional unmixed heating circuit. A 0-10V input with provision for a common alarm signal, for use with BMS control.