Giacomini GE556 Datasheet / Operating Instructions

GE556
HIU GE556Y309
with flow rate dynamic
balancing valve
Versions and product codes

PRODUCT CODE MAIN FUNCTION
Flow rate dynamic
GE556Y309
balancing valve
WARNING. The HIU is fit for installation in indoor rooms and boiler rooms

and for use with non-aggressive fluids (water, glycol-based water complying
with VDI 2035/ONORM 5195).
Completion codes
• GE552: thermal energy meter
• GE552-2: domestic water meters
• K270: ON/OFF actuator for zone valve control
• GE551Y072: surface-mounting template
• GE551Y073: flush-mounting template
• R189VY004: check valve for DCW outlet
• Components for M-Bus data centralization GE552-4 or
Wireless M-Bus data centralization GE552-W
GE556Y309
EXCHANGER
POWER
44 kW
HIUs GE556 are the ideal solution for condominial metering
with centralized heating-water production and zone
distribution to produce domestic hot water locally (for each
residential unit).
The HIUs include a delivery pipe and a return pipe to distribute
energy for both room heating and domestic hot water; the
only additional pipe required is for domestic cold water.
No pipes are therefore required for distribution and
recirculation of domestic hot water.
HIU GE556Y309's key feature is the flow rate dynamic
balancing valve installed on the domestic water primary
circuit.
Technical data

Primary circuit
• Max. working temperature: 90 °C
• Max. working pressure: 16 bar (10 bar with plastic spacer)
• Primary nominal flow rate: 1000 l/h
Heating circuit
• Max. heating power: controllable through flow rate control
lockshield
Domestic hot water production
• Domestic hot water production power with inlet at
75 °C, 1000 l/h flow rate on primary circuit and ΔT 35 °C on
secondary circuit (50-15 °C): 44 kW
• Domestic water circuit max. power: control through dynamic
balancing valve R206A
• Corresponding domestic hot water flow rate: 18 l/min
• Minimum hot water distribution: 2,75 l/min
Priority valve
• Supply voltage/frequency: 230 Vac / 50 Hz
• Total electric power absorbed: 6 VA
• Hydraulic commutation time: 6 seconds
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d'Opaglio (NO) Italia
 consulenza.prodotti@giacomini.com
 +39 0322 923372 - giacomini.com
Datasheet/Instructions
1000EN  05/2021
047U58278
1