GE556 Standard heat interface unit

Heat Interface Unit (HIU) for centralized systems, for managing heating and domestic hot water production.
- Heat exchanger for instantaneous production of domestic hot water.
- Filter and housing for delivery temperature probe, on the primary side.
- Motorizable zone valve and lockshield for static balancing, on the heating side.
- Pre-arrangement for housing the HIU inside a metallic template fitted with shut-off valves.
- Plastic spacers for installation of thermal energy meter and domestic water meter.
- Box with terminal board for electric connections.
- Fittings for connection and fixing.
- Max. working temperature: 90 °C
- Max. working pressure: 16 bar (10 bar with plastic spacer)

Dimensions and notes:
- GE556Y301: 540 x 390 x 150 mm
Priority valve
Heat exchanger power: 44 kW
- GE556Y302: 540 x 390 x 150 mm
Priority valve
Heat exchanger power: 58 kW
- GE556Y303: 540 x 390 x 15 0 mm
Thermostatic control and dynamic balancing
Heat exchanger power: 58 kW
- GE556Y314: 540 x 390 x 150 mm
Softened water management
Heat exchanger power: 44 kW

To complete the GE556 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
- Additional valve kit (only for GE556Y314)
- Components for M-Bus data centralization (GE552-4 series),
or Wireless M-Bus data centralization (GE552-W series)

Technical documentation GE556Y301-302,GE556Y303