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DTC 648

Compensator for boiler sequencing

Compensator for boiler sequencing Application

In combination with 1,2 or 3 relay control modules ISC 648, DTC 648 can sequence two or more one- or two-stage boilers, with or without shut-off valves, for the control of the primary manifold or flow temperature in a heating plant, and control the temperature of a DHW plant.
C-Bus compatible.
C-Ring compatible.
Essential accessories: 1 detector on manifold or heating flow.
Optional accessories: 1 outside detector, 1 DHW detector.

Schematic diagram Certifications Catalogue

Code	Description	Data Sheet
DTC 648	Compensator for boiler sequencing.	A 410

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Wiring diagram

Accessories

Certifications

Power supply: 230 V ~; Consumption: 5 VA; DIN 105 x 115 modular enclosure; Protection: IP 40.
Digital programming by means of four operating keys and alphanumeric display.
Setting dates for heating season and automatic switching GMT- BST.
Seven 24-hour programmes, two 7-day programmes, 25 holiday periods and one special period with date setting.
Control temperature primary manifold or heating plant flow:
– Fixed point;
– Variable in relation to outside temperature or to temperature requested by heating zones with min. and max. flow temperature.
Timed On-Off control of primary manifold or heating plant pump.
Minimum and maximum limits flow temperature.
Manual correction heating curve origin to compensate for seasonal weather changes.
Eco Off function.
Summer plant exercise.
Sequence: Manual inversion from display or timed automatic.
Control calorifier for production DHW: – On-Off control calorifier pump with timed events programmes independent of heating.
– Antibacteria function: once a week at 70 °C for 90 minutes.
One On-Off alarm input, one measurement input 4 ... 20 mA (with ASA 420).
Alarms for controller fault and for short or open detector circuits.

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Compensator for boiler sequencing