Heat Interface Unit (HIU) with double heat-exchanger

Heat Interface Unit (HIU) with a double heat exchanger, for centralized systems for high and low temperature heating and domestic hot water production (only for GE556Y176-Y177).
- Heat exchanger to separate the secondary heating circuit from the primary circuit of the condominium
- Heat exchanger for the instantaneous production of domestic hot water (except GE556Y171)
- Self-regulating circulator, which conforms to directive ErP (2009/125/EC), expansion tank, safety valve, pressure gauge, pressure switch, automatic air vent valve, on heating side
- Thermostatic control of the heating temperature (possibility of high and low temperature)
- Automated zone valve, on heating side
- Priority control in the production of domestic hot water (except GE556Y171)
- TMV2+TMV3+WRAS-certified anti-scalding thermostatic mixer (except GE556Y171)
- Adjustable by-pass, dynamic balancing valve, primary side (except for the by-pass, there is no primary flow when the satellite is not active), automatic air vent valve
- Pre-arrangement for housing the HIU inside a metallic template fitted with shut-off valves
- Brass spacers for installation of thermal energy meter and domestic water meter
- Box with terminal board for electric connections
- Max. working temperature: 90 °C
- Max. working pressure: 16 bar

- Dimensions of HIU and notes:
GE556Y171: 450 x 630 x 180 mm
Only for heating
Heat exchanger power: 17,4 kW

GE556Y172: 450 x 63 0 x 180 mm
Heating and domestic water production
Heat exchanger power: 17,4 kW / 49 kW

GE556Y173: 450 x 630 x 180 mm
Heating and domestic water production
Heat exchanger power: 17,4 kW / 58 kW

To complete the GE556-1 HIU, the following may be ordered separately:
- Thermal energy meter, GE552 series
- Domestic water meter, GE552-2 series
- Actuator for commanding the zone valve, K270
- Template for installation in worksite
- Components for M-Bus data centralization (GE552-4 series)<(>,<)>
or Wireless M-Bus data centralization (GE552-W series)

Code Size Pack Single Pack Multiple
GE556Y171 3/4" - heating 1 -
GE556Y176 3/4" - heating+SW 1 -
GE556Y177 3/4" - heating+SW 1 -
Other products "Direct and indirect thermal energy metering"
Standard Heat Interface Unit (HIU)
Heat Interface Unit (HIU) with electronic regulation
Heat Interface Unit (HIU) with differential pressure control valve