GE556-1

Heat Interface Unit (HIU) with double heat-exchanger

Heat Interface Unit (HIU) with 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 (ErP 2009/125/EC), expansion tank, safety valve, pressure gauge, pressure switch, manual air vent valve, on heating side
- Thermostatic control of the heating temperature (possibility of high and low temperature)
- Motorized 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)
- Manual air vent valve, adjustable by-pass, dynamic balancing valve, primary side (except for the by-pass, there is no primary flow when the satellite is not active)
- 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:
primary circuit: 16 bar
secondary DHW circuit: 10 bar
secondary heating circuit: 3 bar

- Dimensions and notes:
•GE556Y171: 450 x 630 x 180 mm
Only for heating
Heat exchanger power: 17,4 kW
•GE556Y176: 450 x 63 0 x 180 mm
Heating and domestic water production
Heat exchanger power: 17,4 kW / 56 kW
•GE556Y177: 450 x 630 x 180 mm
Heating and domestic water production
Heat exchanger power: 17,4 kW / 67 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 series
- Template for installation in worksite, GE551-2 series
- 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" 1 -
GE556Y176 3/4" 1 -
GE556Y177 3/4" 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
Modular Heat Interface Unit (HIU)
Heat Interface Unit (HIU) with electronic regulation and double heat exchanger
Remote control/chronothermostat with display for GE556-2 and GE556-6
External temperature probe for GE556-2 and GE556-6