CONTROLLER FOR SEQUENCING TWO SINGLE- OR TWO-STAGE BOILERS WITH OR WITHOUT SHUT-OFF VALVES OPTIONAL TELEMANAGEMENT XCC 602
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APPLICATION

Designed for sequencing two boilers with one- or two-stage burners and shut-off valves. Control of primary manifold temperature with temperature measurement by means of a sensor on manifold or two sensors on the boilers.

• Communication with other controllers via serial C-Ring protocol.

Essential detectors:

• 1 temperature sensor on manifold or 2 boiler sensors.

Optional accessories:

• 1 outside sensor.

FEATURES

• Power supply: 230V~;

• Consumption: 5VA;

• DIN 105 X 115 modular enclosure;

• Protection: IP 40.

• Digital programming by means of four keys and alphanumeric display.

• Setting dates of heating season and automatic switching GMT – BST.

• Seven 24hour periods and two 7day programs.

• 25 holiday programs and one special period with dates.

• Control of zone temperature:

  • Fixed point;

  • Variable in relation to outside temperature;

  • Variable in relation to temperature requested by consumer zones.

• Sequencing: manual switching from display or timed automatic.

• Automatic inversion of sequence in event of lockout of lead boiler.

• Enabling of lag boiler according to mean temperature of zone.

• Digital control of burners and of valves with adjustable delay closure.

• Theoretical metering of burner operating hours.

• Two inputs for measurement and alarms for flue gas temperature and for lockout burners. 

• Three digital alarm inputs. 

• Alarms for plant faults and for open or short sensor circuit.

Code		Description	Data sheet
XCC 602		Controller for sequencing two boilers with N.C. relay lag boiler.	A 312
ACB 400		Plug-in for communicating via .	-

DETECTORS AND ACCESSORIES