Giacomini GE556Y403 User manual

1
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
GE556-2
Datasheet/Instruction
1071EN 05/2022
047U59108
GE556Y403/406 heat interface
units with electronic regulation
and adjustable tail pieces
The GE556Y403 and GE556Y406 heat interface units (HIU) allow the metering of heat energy consumption for heating and
the production of DHW (Domestic Hot Water) in modern autonomous systems with centralised heat production (e.g. district
heating).
The management of the HIUs parameters is completely electronic.
This allows signicant energy savings, minimizing the ow demand from the primary circuit and reducing the return temperature.
The various parameters can be set via remote control which also performs the function of programmable chronothermostat.

2
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
Technical data
• Max. working temperature: 90 °C
• Max. working pressure: 10 bar
• Temperature range of the secondary heating circuit:
- low temperature: 25÷45 °C
- high temperature: 25÷85 °C
• Temperature range of the secondary DHW circuit: 30÷60 °C (Set-Point 50 °C)
• Nominal ow rate on primary circuit:
1070 l/h @ 75 °C for 58 kW
1150 l/h @ 75 °C for 67 kW
WARNING. The satellite can be used in closed boiler rooms for operation
with non-aggressive uids (water, glycol-based water in compliance with VDI
2035/ÖNORM 5195).
WARNING. Max. working differential pressure for the primary circuit = 4 bar
(priority valve)
• G 3/4“F connections with adjustable tail pieces.
• Electronic thermoregulation with Set-point, to manage the DHW temperature and heating temperature.
• Remote control with chronothermostat function to manage the parameter (for single zone), with display.
• Multizone additional control by the free contact on the electronic board (additional thermostats to be ordered separately).
• External temperature probe for climatic compensation.
• Heat exchanger for instantaneous production of domestic hot water.
• Flow switch for priority of domestic hot water production.
• Motorizable 2-way zone valve, for thermal and electrical safety on the heating circuit.
• Motorized 3-way priority valve on the delivery of the primary circuit.
• Motorized 2-way modulating valve on the return of the primary circuit.
• Filter and manual air vent valve on the primary circuit.
• Safety pressure switch for low pressure on the primary circuit.
• Self-modulating circulator 15/6, centre distance 130 mm, complying with ErP directive (2009/125/CE).
• Heat exchanger and fully insulated piping.
• WRAS certied components for the domestic water circuit.
• Painted sheet metal cabinet (RAL9010), with key locking.
Caratteristiche principali
Versions and product codes
Completion codes
• GE552: thermal energy meter
• GE552-2: domestic water meters
• GE550Y010: optional additional unit output for domestic cold water outlet
• GE551Y133: template with shut-o valves and 3/4”M system connections
• GE551Y134: raised template with shut-o valves and 3/4”M system connections
• GE500Y258: additional shut-o valve to be installed on the template when present the GE550Y010 unit output
• R473M: thermo-electro actuator for 2-way zone valve for thermal safety on the heating circuit
• Data centralization components via M-Bus, GE552-4 series, or via Wireless M-Bus, GE552-W series
PRODUCT CODE HIU TYPE HEATING CIRCUIT
POWER
DHW HEAT EXCHANGER
NOMINAL POWER TEMPLATE WITH VALVES
GE556Y403 Heating and DHW production 26 kW 58 kW GE551Y133/GE551Y134
GE556Y406 Heating and DHW production 26 kW 67 kW GE551Y133/GE551Y134
NOTE. Remote control and external temperature probe included with HIU
NOTE. Use energy meters approved in accordance with the standardized “ow disturbance elements” and provided for by the EN 1434 for null rectilinear section
upstream and downstream of the meter, such as the GE552Y122.

3
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
Components
PRIMARY CIRCUIT
1Housing for energy meter temperature probe
2Filter
3Motorized 3-way priority valve, for DHW function
4Pressure gauge 25 bar
5Heat exchanger for the domestic hot water function
6Manual air vent valve
7Minimum pressure switch
8Motorized two-way modulating valve
9Brass spacer for thermal energy meters
DHW PRO-
DUCTION
10 Flow switch
11 Brass spacer for water meters
HEATING
12 2-way zone valve for thermal and electrical safety
(motorizable with optional R473M thermo-electric actuator)
13 By-pass lockshield
14 Circulator
OTHER COMPONENTS
15 Cabinet with electronic regulation unit
16 Remote control / chronothermostat with display
17 External temperature probe
HYDRAULIC CONNECTIONS
ADomestic cold water inlet
BDomestic cold water outlet (optional)
CDomestic hot water outlet
DPrimary inlet
EPrimary outlet
FHeating return
GHeating delivery
BADEFGC
1
2
4
3
5
10
11
6
7
15
12
13
14
9
8
16 17

4
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
Completion codes
• GE552: thermal energy meter. The meter temperature probe must be installed in the special housing (Components - Ref. 1).
• GE552-2: domestic water meters
• GE550Y010: optional additional unit output for domestic cold water outlet
• GE551Y133: template with shut-o valves and 3/4”M system connections
• GE551Y134: raised template with shut-o valves and 3/4”M system connections
• GE500Y258: additional shut-o valve to be installed on the template when present the GE550Y010 unit output
• R473M: thermo-electro actuator for 2-way zone valve for thermal safety on the heating circuit
B A DEFGC
GE550Y010
GE500Y258
GE552-2 GE552
R473M GE551Y133
GE551Y134

5
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
Operation
Motorized 3-way priority valve
Motorized 2-way modulating valve
Motorizable 2-way zone valve
By-pass lockshield
Manual air vent valve
Circulator
Heat exchanger
Pressure gauge
PPMinimum pressure switch
Temperature probe
FFlow switch
EEBrass spacer for thermal energy meter
HBrass spacer for domestic hot water
CBrass spacer for domestic cold water
ADomestic cold water inlet
BDomestic cold water outlet (optional)
CDomestic hot water outlet
DPrimary inlet
EPrimary outlet
FHeating return
GHeating delivery
F
P
E
H
BADEFGC
C

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Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
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Secondary circuit: heating
Delivery (G) and return (F). The heating circuit is composed
of a motorized 2-way zone valve with thermal safety
function (the valve stops the ow in the system in the event
the delivery temperature exceeds 5 °C, the temperature
set on the remote control - Set Point), an adjustable by-
pass lockshield and a high-eciency circulator (ErP
2009/125/EC).
DEFG
Primary circuit
Inlet (D) and return (E). The primary circuit is composed of a
Y-lter, a motorized 3-way priority valve, a manual air vent
valve, a heat exchanger, a manometer, a minimum pressure
switch and a motorized 2-way modulating valve.
Energy Saving function: the 2-way modulating valve
controlled by the electronic management of the HIU,
restricts the ow demand from the primary to the minimum
necessary to obtain the preset Set-Point temperature.
The priority valve diverts the ow in the heat exchanger (if
there is a request of DHW: DHW ow switch enabled) or in
the heating system.
The thermal energy meter can be installed in place of the
brass spacer, tting its temperature probe in the relative
housing (Components - Ref. 1).
DE
Secondary circuit: DHW
Cold water inlet (A), hot water outlet (C) and cold water
outlet (B - optional). The DHW circuit is comprised of a ow
switch and a brass spacer for the introduction of the water
meter. A hot water meter can be installed Instead of the
brass spacer.
B A C

7
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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Settings of the remote control/chronothermostat
Impostazione orologio e temperature
Depending on the operating mode selected (OFF / SUMMER / WINTER / HEATING ONLY) by pressing the button ,
the clock and the temperature of the boiler can be set.
The value is displayed for a time equal to the display settings time delay and is identied by its ashing icon. Press key
to pass to the next value and turn the knob to modify the value.
• Clock: press key until the icon and the time value start to ash.
Turn the knob to select the desired time.
Press the knob to pass to the minutes.
The minutes start ashing: turn the knob to select the desired minutes. Press the knob to pass to the day of
the week. The days of the week start ashing: turn the knob to select the desired day.
Press the knob to conrm the value entered.
• Day Set point: press key until the icon and the day set point value start to ash.
Turn the knob to select the desired value.
• Night Set point: press key until the icon and the night set point value start to ash.
Turn the knob to select the desired value.
• Heating Set point: press key until the icon and the heating set point value start to ash.
Turn the knob to select the desired value.
• DHW Set point: press key until the icon and the DHW set point value start to ash.
Turn the knob to select the desired value.
• Kd: this setting is only available if the remote control is congured as the modulator with the use of the external probe (P04
= 2 or 3). Press key until the icon and the relative value start to ash.
Turn the knob to select the desired value.
NOTE. For the other operating modes of the remote control, refer to the corresponding instruction sheet.
Operation in mode: OFF, SUMMER, WINTER, HEATING ONLY
The selection of the operating mode is done by repeatedly pressing the button .
•O:“OFF” and the current time are shown on the display. Only the antifreeze function (if set) is enabled in this mode.
Any request for the DHW or heating mode operation is ignored.
• Summer: the measured room temperature, the current time and the icon are displayed . The DHW, if set, and the antifreeze
function are enabled in this mode. Any request for the heating mode operation is ignored.
• Winter: the display shows the measured room temperature, the time and the current day, the icons and the program
set for the current day. All DHW, heating and, if set, antifreeze functions are enabled in this mode.
• Heating only: the display shows the measured room temperature, the time and the current day, the icon and the program
set for the current day. All heating and, if set, antifreeze functions are enabled in this mode.
Any request for the DHW mode operation is ignored.

8
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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Preheating Function
The preheating function has the purpose of keeping the domestic water heat exchanger hot so as to shorten the initial
adjustment time required to reach the setpoint temperature, thus providing greater comfort.
The function can be enabled/disabled by setting the t12 parameter via remote control.
When enabled, during the stand-by stage in SUMMER or WINTER mode, the function continuously monitors the domestic
water probe and when the corresponding temperature falls below the DHW setpoint dierential threshold of -8 °C, a domestic
water cycle is forced on with power supplied at 30% until the DHW temperature reaches the adjustment value of the function
corresponding to the DHW setpoint -2 °C. There is a time limit of 2 minutes for the function to reach this value.
If the DHW temperature fails to reach the setpoint threshold value after this time, the function is interrupted and inhibited for
a period of 30 minutes.
WARNING. When the DHW preheating function is enabled, plan to install a compensation device (e.g., expansion vessel/water hammer damper).
Screed Heating Function
The screed heating function facilitates the installation of low-temperature oor systems.
It is supported in the WINTER and HEAT ONLY operating modes.
The function is enabled/disabled by setting the t13 parameter via remote control.
Once activated, it forces a request for operation in heating mode at a setpoint established by the t14 parameter, for a xed
time interval of 72 hours.
Subsequently, a new setpoint will be forcibly set with the value dened by the t15 parameter, for a time interval corresponding
to the value established by the t16 parameter, expressed in days.
Remote control Function
NOTE. To enable parameter programming, please refer to the remote-control manual.
PARAMETER RANGE DESCRIPTION DEFAULT CONFIGURATION SETTINGS
t00 0/1 Heat exchanger conguration 0 0=single, 1=double
t01 0/1 Heating range 1 0=standard, 1=reduced
t02 0/1 dr. group conguration 0 0=combined, 1=domestic water only
t03 0/120 Mixing valve time 12 seconds
t04 0/30 KD for OTC 30
t05 0/1 Enabling of H2O pressure switch 1 0=enabled, 1=disabled
t06 0/240 CH anticycle timming 30 seconds
t07 0/1 OVT type DHW 0 0=xed, 1=correlated to the Setpoint
t08 0/1 OVT type CH 0 0=xed, 1=correlated to the Setpoint
t09 0/1 Enabling safety valve 1 Screed heating timing nal phase
t10 0/60 DHW rq probe conguration 0 0=contact, 1=fluxmeter
t11 0/1 Disabling TA remotely 0 Screed heating timing nal phase
t12 0/1 Enabling preheating 0 0=disabled, 1=enabled
t13 0/1 Enabling screed heating 0 0=disabled, 1=enabled
t14 25/34 Screed heating starting temperature 72 hours 25 °C
t15 35/45 Screed heating ending temperature 45 °C
t16 4/10 Screed heating timing nal phase 4 days

9
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
Circulator features
Operation
Automatic operation with constant pressure (recommended).
Automatic operation with variable pressure.
Automatic operation for air purging
(lasting 10 minutes): the circulator increases and reduces the
speed to aggregate the air bubbles and aid their elimination via
the air vent valve (not included with the circulator).
LED - Errors
xed green Normal operation.
ashing green Automatic operation for air purging.
ashing green/red Temporary anomalous situation:
1) incorrect voltage.
2) incorrect uid/ambient temperature
ashing red Circulator idle (permanent error: the circulator must be manually
reset). It may be necessary to replace the circulator.
NO LED
No electricity supply:
1) circulator not powered: check the cable connection.
2) LED damaged: check whether the circulator is working.
3) electronics damaged: replace the circulator
Self-modulating circulator 15/6 (230 V)
p-costant
6
5
4
3
2
1
00 0,5 1 1,5 2 2,5 3 Q [m3/h]
Q [m3/h]
H [m H2O]
00 0,5 11,5 2 2,5 3
10
20
30
40
P1 [w]
1 m
0,5 m
2 m
4 m
3 m
5 m
max
Circulator characteristics

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Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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Electrical connections
Electric technical data
• Electronic board power supply: 230 V
• Supply voltage frequency: 50÷60 Hz
• Room operating temperature: -20÷60 °C
• Room storage temperature: -20÷80 °C
• Humidity: max 90 % @ 40° C non-condensing
• Maximum absorption: 7 VA
• Maximum length of external probe cable: 30 m
• Maximum length of remote control cable: 30 m
WARNING. Work on electrical components must be carried out by qualied personnel. Make sure that the power supply is disconnected when making
connections.
M-Bus
To connect the M-Bus data transfer cable to the concentrator, refer to the datasheet of the thermal energy meter used.
Electronic board
• The HIU is powered electrically by connecting the 230 V mains supply to the three-pin terminal board M1 of the electronic board.
• The remote control /chronothermostat (K480Y002) is connected to terminals 23-24 of the electronic board.
• The external temperature probe (K365PY002) is connected to terminals 27-28 of the electronic board.
• The optional safety thermostat (K373/K373I), is connected to terminals 39-40 of the electronic board.
• Multizone additional control to terminals 21-22 on the electronic board (additional thermostats to be ordered separately).
24 23 22 21 20 19
32 31 30 29 28 27 26 25
40 39 38 37 36 35 34 33
42 41
1 2 3 4 5 6 7 8
9 10 11 12 13
14 15
L N
18 17 16
CHIUDE - MARRONE
COMUNE - BLU
APRE - NERO
TENSIONE 230 Vac
CHIUDE - MARRONE
COMUNE - BLU
APRE - NERO
LINEA - MARRONE
NEUTRO - BLU
TERRA - GIALLO
ROSSO
BIANCO
VERDE
GRIGIO
NERO
LINEA - MARRONE
NEUTRO - BLU
FLUSSOSTATO
TESTA
R473M
230 VAC
PRESSOSTATO
SONDA SANITARIO
SONDA MANDATA
MISCELATRICE
CIRCOLATORE
DEVIATRICE
SONDA RITORNO
COMANDO REMOTO K480Y002
SONDA ESTERNA K365P
TERMOSTATO DI SICUREZZA K373