GE556-5

Modular heat interface units (HIU) for thermal energy consumptions in heating systems and domestic hot water production in modern autonomous systems with centralized heat production.
Possibility to assemble various components to create an interface unit suitable based on installation needs (control of high/low temperature heating with/without balancing valves, control of domestic hot/cold water, etc).
- Max. working temperature of primary and secondary circuits (heating and domestic hot water): 90 °C
- Max. working pressure of primary and heating secondary circuits: 10 bar
- Max. differential pressure of primary circuit: 0,5 bar (0,5÷2 bar if present GE556Y532)
- Max. working pressure of domestic hot water circuit: 10 bar
- Temperature range of heating secondary circuit: 20÷70 °C (Set-point 45 °C)
- Temperature range of domestic hot water secondary circuit: 20÷70 °C (Set-point 50 °C)

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MODULAR HEAT INTERFACE UNIT: SM3 VERSION
Starting from the GE556Y505/506 basic codes, the heat interface unit can be configured with additional product codes and possible optional.

- Basic codes
•GE556Y505: Lower primary connections
•GE556Y506: Upper primary connections

- Domestic hot water circuit - Heat exchangers
•GE556Y511: 16-plate exchanger + 5 mm insulation
•GE556Y512: 16-plate exchanger + 20 mm insulation
•GE556Y513: 26-plate exchanger + 5 mm insulation
•GE556Y514: 26-plate exchanger + 20 mm insulation
•GE556Y515: 36-plate exchanger + 5 mm insulation
•GE556Y516: 36-plate exchanger + 20 mm insulation

- Domestic hot water circuit - Control components
•GE556Y521: DHW production with no controls
•GE556Y522: DHW production with thermostatic control

- Primary circuit
•GE556Y531: Primary circuit connections with no controls
•GE556Y532: Primary circuit connections with differential pressure control valve with double regulation
•GE556Y530: Primary circuit connections with compact differential pressure control valve

- Secondary circuit
•GE556Y549: Secondary circuit, direct heating with no controls
•GE556Y548: Secondary circuit, direct heating with static balancing
•GE556Y549: Secondary circuit, direct heating with presetting valve, possible installation of thermo-electric actuator
•GE556Y540: Secondary circuit, low temperature heating kit (circulator + thermostatic head).

- Optional
•GE556Y551: Insulation
•GE556Y561: Domestic cold water outlet unit output
•GE556Y567: Domestic water recirculation unit output with circulator
•GE556Y568: Domestic water recirculation unit output without circulator
•GE556Y566: Thermostatic by-pass to maintain constant the domestic hot water temperature of the heat exchanger
•GE556Y569: Drain cocks

- Completion codes
•GE551Y089: Template with 6 shut-off valves, for GE556Y505 or GE556Y506 HIU including insulation
•GE551Y090: Lowered template with 6 shut-off valves, for GE556Y505 or GE556Y506 HIU without insulation
•GE500Y255: Additional domestic cold water valve, for installation on template with GE556Y561 optional kit
•GE500Y261: Pair of additional valves for low temperature heating delivery and return, for installation on template with GE556Y540 kit for secondary circuit
•GE551Y185: Metal cover for HIU, only for HIU with GE551Y089 template
•R473/R473M: Thermo-electric actuator normally closed to control presetting valve, included with GE556Y543 kit (R473X221 230 V; R473X222 24 V; R473MX221 230 V; R473MX222 24 V)
•GE552: Thermal energy meter (GE552Y159 3/4”, volumetric, 1,5 m3/h, M-Bus; GE552Y216 3/4”, volumetric, 1,5 m3/h, M-Bus
with Wireless M-Bus predisposition; GE552Y122 3/4”, ultrasounds, 1,5 m3/h, M-Bus)
•GE552-2: Domestic water meter (GE552Y191 3/4”, domestic hot water; GE552Y190 3/4”, domestic cold water, to be ordered separately if GE556Y561 additional unit output is present)

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MODULAR HEAT INTERFACE UNIT: COMPACT VERSION
Starting from the GE556Y503/504 basic codes, the heat interface unit can be configured with additional product codes and possible optional.

- Basic codes
•GE556Y503: Lower primary connections
•GE556Y504: Upper primary connections

- Domestic hot water circuit - Heat exchangers
•GE556Y511: 16-plate exchanger + 5 mm insulation
•GE556Y512: 16-plate exchanger + 20 mm insulation
•GE556Y513: 26-plate exchanger + 5 mm insulation
•GE556Y514: 26-plate exchanger + 20 mm insulation
•GE556Y515: 36-plate exchanger + 5 mm insulation
•GE556Y516: 36-plate exchanger + 20 mm insulation

- Domestic hot water circuit - Control components
•GE556Y521: DHW production with no controls
•GE556Y522: DHW production with thermostatic control

- Primary circuit
•GE556Y531: Primary circuit connections with no controls
•GE556Y532: Primary circuit connections with differential pressure control valve with double regulation
•GE556Y530: Primary circuit connections with compact differential pressure control valve

- Secondary circuit
•GE556Y544: Secondary circuit, direct heating with presetting valve, possible installation of thermo-electric actuator

- Optional
•GE556Y552: Insulation
•GE556Y561: Domestic cold water outlet unit output
•GE556Y564: Domestic water recirculation unit output with circulator
•GE556Y565: Domestic water recirculation unit output without circulator
•GE556Y566: Thermostatic by-pass to maintain constant the domestic hot water temperature of the heat exchanger
•GE556Y569: Drain cocks

- Completion codes
•GE551Y087: Template with 6 shut-off valves, for GE556Y503 or GE556Y504 HIU including insulation
•GE551Y088: Lowered template with 6 shut-off valves, for GE556Y503 or GE556Y504 HIU without insulation
•GE500Y258: Additional domestic cold water valve, for installation on template with GE556Y561 optional kit
•GE551Y184: Metal cover for HIU, only for HIU with GE551Y087 template
•R473/R473M: Thermo-electric actuator normally closed to control presetting valve, included with GE556Y543 kit (R473X221 230 V; R473X222 24 V; R473MX221 230 V; R473MX222 24 V)
•GE552: Thermal energy meter (GE552Y159 3/4”, volumetric, 1,5 m3/h, M-Bus; GE552Y216 3/4”, volumetric, 1,5 m3/h, M-Bus
with Wireless M-Bus predisposition; GE552Y122 3/4”, ultrasounds, 1,5 m3/h, M-Bus)
•GE552-2: Domestic water meter (GE552Y191 3/4”, domestic hot water; GE552Y190 3/4”, domestic cold water, to be ordered separately if GE556Y561 additional unit output is present)

IMPORTANT
Second to last number of each product code indicates product type:
0 for heat interface unit base
1 for heat exchanger of domestic water circuit
2 for control components of domestic water circuit
3 for control components of primary circuit
4 for control components of secondary circuit (heating)
5 for insulation (optional)
6 for other optional components

To ensure proper operation of heat interface unit, order at least one product code for each type of component with 0, 1, 2, 3, 4 as second to last figure.

Product codes with 5, 6 as second to last figures are considered optional.