HIU single dwelling unit substations

18÷40 kW heating and 10÷50 kW Hot Domestic Water production.

mono_2_0

standards

ACQUA_CALDA ACQUA_SURRISCALDATA ACS_DIRETTA SOLO_RISC
From 15 to 35 kW
HIU Models "Mono" e "Mono Combi"

From 18 to 40 kW heating and 10 to 50 kW DHW production.
Versions: base, plus, in-wall and design.
With heat meter, control and security devices.
PN 25 on primary circuit.
For hot and superheated water networks.
Automatic water load.
Operator panel with chronothermostat function.
Large capacity expansion tank.
CE / PED Certification.
Ready for remote metering and remote control.
Flow rate , power and return temperature limitation setting.
Fixed-point temperature management or external temperature compensation.

Strength

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).

Common schematic

Working Conditions

HOT WATER SUPERHEATED WATER
THERMAL DESIGNPRIMARY CIRCUIT 90/65°C 115/65°C
THERMAL DESIGNSECONDARY CIRCUIT 60/75°C 60/75°C
PRESSURE DROP (Δp) @ NOMINAL CONDITIONS - CIRCUITS 1 & 2 < 10 m.c.a. (1°)< 3 m.c.a. (2°) < 10 m.c.a. (1°)< 3 m.c.a. (2°)
MECHANICAL DESIGNCIRCUITS 1 & 2 PN25 (1°)PN16/PN10 (2°)
THERMAL OVERSIZING 20%
CERTIFICATION DESIGN CE/PED - ISPESL
ΔP EMERGENCY CLOSEDOWNREGULATION VALVE 25 barg
OPTIMIZATIONS FLOW RATE LIMITATION, REMOTE SIMULTANEOUS TEMPERATURE AND POWER SETTING

Our models

Type Model DN 1°
(in/out)
DN 2°
(in/out)
PN 1°
(bar)
PN 2°
(bar)
Tmax 1°
(°C)
Tmax 2°
(°C)
Dimensions
(mm)
Weight
(kg)
Hot Water Heating Brazed plate MONO 18 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 30
Overheated Water Heating Brazed plate MONO 18 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 30
Hot Water Heating Brazed plate MONO 25 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 30
Overheated Water Heating Brazed plate MONO 28 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 30
Hot Water Heating Brazed plate MONO 30 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 30
Overheated Water Heating Brazed plate MONO 40 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 30
Hot Water Heating and DHW-direct Brazed plate MONO COMBI 18 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 40
Overheated Water Heating and DHW-direct Brazed plate MONO COMBI 18 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 40
Hot Water Heating and DHW-direct Brazed plate MONO COMBI 25 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 40
Overheated Water Heating and DHW-direct Brazed plate MONO COMBI 28 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 40
Hot Water Heating and DHW-direct Brazed plate MONO COMBI 30 C ¾” ¾” 25.0 10.0 110.0 95.0 500x800x150 40
Overheated Water Heating and DHW-direct Brazed plate MONO COMBI 40 S ¾” ¾” 25.0 10.0 130.0 95.0 500x800x150 40