HIU single dwelling unit substations

RANGE AND PERFORMANCES

• 12 models for district heating and DHW for hot and superheated water networks.
• 4 versions: base, in-wall, plus and design.
• Heating 18-40 kW.
• DHW 13-22 l/min.

MANAGEMENT

• Heating water temperature setting and DHW through PID regulator.
• Operator panel with chronothermostat function, 30m remotable with integrated temperature probe.
• Ready for remote metering and remote control via Meter-bus protocol or other unified protocol. 
• Specific software for remote metering and remote control, easy to manage. Integration with existing SCADA (Supervisory Control And Data Acquisition) systems or higher.
• 6 implemented limits: limits of flow temperature on secondary circuit, limit of return temperature on primary circuit, heating and DHW flow rate limit, heating and DHW power limit.

SPECIAL FUNCTIONS AND SERVICES

• Legionella prevention function.
• Anti-scale function.

CONSTRUCTION

• Extremely compact dimensions: width 500mm, height 800, depth 160 mm
• powder coating steel frame.
• Very sturdy structure, no plastic components.
• Mechanical design temperature: 135°C
• Mechanical design pressure on primary circuit: PN25
• Mechanical design pressure on secondary circuit and DHW: PN10
• Nominal temperature on primary circuit: 90/65°C 
• Nominal temperature on secondary circuit: 80/60°C
• Nominal thermal conditions on DHW instantaneous circuit : 10/45°C
• High performance pump: 7 w.c.m. 4 m³/h.
• CE/PED approved through ISPESL with safety redundancy in addition to those required by legislation.
• Non return valve on primary circuit.
• Safety pressurestat.
• block thermostat with manual reset.
• Regulation thermostat with automatic reset.
• Large expansion tank (12 l).
• Stainless steel net filter on primary circuit, secondary and DHW.
• Ultrasonic heat meter complies with the legislation EN 1434/MID.
• DHW produced by primary circuit heat exchanger for safety reason.
• Automatic remote controlled load valve with meter and secondary circuit pressure display gauge.
• Amarc DHS components supplier: ALFA LAVAL (heat exchangers) | DANFOSS (Control valves, actuators, and regulators ) SIEMENS (heat meters, regulation valves, actuators) | KAMSTRUP (heat meters) | BRANDONI (valves and check valves) | NAVAL OY (ball valves) | IVR (shut-off valves) | CALEFFI/WATTS (security valve) | WILO (pumps) | HONEYWELL (actuators, two-way and three-way control valves).