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XTT 608

Compensating controller for district heating sub-stations with heat exchangers
optional telemanagement

Application

Designed for the control of district heating substations comprising one heat exchanger Heating (modulating control) and one DHW heat exchanger (On-Off or modulating).
Data communication with other controllers via serial C-Ring connection.
Essential sensors: 1 heating flow sensor, 1 DHW storage tank sensor.
Optional accessories: 1 outside sensor, 1 room sensor, 1 primary return sensor, 1 heating return sensor,1 DHW distribution sensor.

Schematic diagram Certification Catalogue

Code	Description	Data Sheet
XTT 608	Compensating controller for district heating sub-stations with heat exchangers optional telemanagement.	B 284

Features

Data sheet

Wiring diagram

Schematic diagram

Accessories

Certification

Power supply: 230V~; Consumption: 5VA; DIN 105 x 115 modular enclosure; Protection: IP 40.
Digital programming by means of 4 keys and alphanumeric display.
Control of heating flow temperature: - At fixed point with desired flow temperatures Fixed Point 1-2.
– Compensated with desired room temp. Normal 1…5, Setback 1-2, Frosprot.
– Variable in relation to temperature requested by heating zones (C-Ring).
– Modulating control (3-wire) of control valve of primary circuit exchanger Heating.
Forced closure of valve for:
– minimum opening limit.
– minimum limit primary circuit flow.
Valve opening limits for:
– maximum opening limit.
– maximum limit primary circuit return temperature.
– maximum limit primary circuit flow.
– maximum limit temperature difference between primary and secondary returns.
On-Off control heating pump in relation to demand for heat.
Timed programming with seven 24hour programs and two 7day programs.
Functions:
– optimized start and stop; Eco off; Frosprot.
Control of temperature DHW at fixed point (storage or distribution or storage & distribution):
– Three-wire modulating control or On-Off valve primary circuit heat exchanger DHW.
– Timed control DHW circulation pump.
– Timed programming with seven 24hour programs and two 7day programs.
– Antibacteria function.
25 annual periods with dates and separate programming for heating and DHW.
Summer exercise function for valves and pumps.
Automatic switching GMT – BST and summer/winter switching.
Metering degree-days.
Input for measurement flow or input for On-Off alarm
Input for program changing switch or input for On-Off alarm.
Alarms for plant faults and for open or short sensor circuit.
Data recorder.

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Compensating controller for district heating sub-stations with heat exchangers
optional telemanagement

/Catalogue

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MILAN

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Compensating controller for district heating sub-stations with heat exchangers
optional telemanagement

XTT 608

/Catalogue

PRODUCT CATEGORIES

PRODUCT CATEGORIES

FOLLOW US

CERTIFICATIONS

TECHNICAL ASSISTANCE

CONTACTS

FACTORY

MILAN

UK

Compensating controller for district heating sub-stations with heat exchangers optional telemanagement

XTT 608

Compensating controller for district heating sub-stations with heat exchangers
optional telemanagement