Thermona THERM 28 CXE.A

Code: 1044.8

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1 609,92 € –34 %

1 609,92 € –34 % 1 053 € / pcs

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Low-temperature wall-mounted boilers Thermona THERM 28 CXE.A with continuous-flow DHW heating

Chimney version

Boiler features and functions:

The new control electronics are designed with an emphasis on increased user comfort, a display integrated directly on the board, and the replacement of mechanical parameter switches with software settings secured by an entry code, etc.
The automation software has been updated and includes several patented solutions - e.g. a self-diagnostic system and fault evaluation
The board design places emphasis on higher reliability of the operating elements
The board includes a universal terminal block for both a room thermostat and an OpenTherm-communication controller (eliminating the need for the IU 02 unit)
The electronics include both hardware and software for controlling a boiler cascade
The software allows convenient service parameter settings via PC (authorised service only)
The DIMS 01 automation monitoring and tester can still be used (different connectors - wiring adapter pieces required)
For boilers with a tank, the software allows switching off domestic hot water (DHW) heating at the left end position of the DHW temperature control knob
Possibility of connection to a solar system

Improved features of the new boilers:

Suppression of EMC interference caused by the ignition spark and contact switching
Pump operation control, fan operation control
Flue gas discharge control by pressure switch or flue gas thermostat
Power supply of the safety and flue gas thermostat by safe low voltage
Provision of irreversible shutdown
Smooth flame modulation with PWM current regulator
Temperature control by PID-type regulation
Heating temperature monitoring by an NTC temperature sensor (continuous-flow water heating boilers only)
DHW temperature monitoring by an NTC temperature sensor
DHW tank thermostat input (heating of an indirect tank)
Communication with an external controller (OpenTherm) or cascade system (with IU04 and IU05 interfaces)
Communication port for a desktop or laptop computer for boiler monitoring and setting of operating parameters
Optional integrated weather-compensated control using an external temperature sensor
Information menu for checking operating parameters
Setting of boiler operating parameters (setup menu)
Boiler configuration setting after entering an access code (setup menu 2)
Fault detection via the history menu
Three rotary controls for selecting the operating mode, the desired heating temperature and the desired DHW temperature (continuous-flow heating only)
Monitoring of heating water flow, or pressure, by a flow/pressure switch

TECHNICAL DATA	unit	28CXE.A
Heat output for heating min-max	kW	12-28
Nominal heat output for DHW heating	kW	28
Natural gas consumption	m³/h	1,40-3,25
Max. overpressure of heating system	bar	3
Max. inlet pressure DHW	bar	6
Boiler efficiency	%	92
Nominal electrical input	W	120
Protection rating of electrical parts	-	IP 44
Expansion vessel volume	l	10
Flue diameter *	mm	130
Boiler weight	kg	40
Dimensions: height / width / depth	mm	830/430/367