Heat Interface Unit (HIU) GE556Y181 for centralized systems for high and low temperature heating and domestic hot water production. - Heat exchanger for the instantaneous production of domestic hot water (only for GE556Y186/187). - Self-regulating circulator (ErP 2009/125/EC), expansion tank, safety valve, pressure gauge, pressure switch, air vent valve on heating/cooling side - Thermostatic control of the heating temperature with the possibility of high and low temperature (only for GE556Y186/187).- Motorized zone valve, on heating/cooling side- Priority control in the production of domestic hot water (only for GE556Y186/187).- TMV2+TMV3+WRAS-certified anti-scalding thermostatic mixer (only for GE556Y186/187). - Dynamic balancing valve, air vent valve and adjustable by-pass on primary side (except for the by-pass, there is no primary flow when the satellite is not active)- Connections with adjustable tail pieces to facilitate installation.- Pre-arrangement for housing the HIU inside a metallic template fitted with shut-off valves. - Pre-arrangement for installation of thermal energy meter and domestic water meters.- Box with terminal board for electric connections- Max. working temperature: 90 °C.- Max. working pressure:primary circuit 16 barDHW secondary circuit: 10 barheating/cooling secondary circuit: 3 barDimensions (L x H x W) and notes:- GE556Y181: 450 x 700 x 180 mmOnly for heating (17,4 kW)- GE556Y184: 450 x 700 x 180 mmOnly for cooling (5 kW)- GE556Y186: 450 x 700 x 180 mmHeating (17,4 kW) and DWH production (56 kW)- GE556Y186: 450 x 700 x 180 mmHeating (17,4 kW) and DWH production (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- 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) Technical documentation GE556Y181,GE556Y184,GE556Y186-187 data sheet
