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XCC 602

Controller for sequencing two-single or two-stage boilers with or without shut-off valves

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 sensors: 1 temperature sensor on manifold or 2 boiler sensors
Optional sensors: 1 outside sensor.

Schematic diagram Certification Catalogue

Code	Description	Data Sheet
XCC 602	Controller for sequencing two-single or two-stage boilers with or without shut-off valves.	A 312

Data sheet

Wiring diagram

Accessories

Certification

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.

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Controller for sequencing two-single or two-stage boilers with or without shut-off valves