Giacomini GE556-6 Series Operating instructions

1
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
[phone] - giacomini.com
GE556-6
Datasheet/Instruction
1062EN 11/2021
0 47U 59118
GE556Y413/416 heat interface
unit with electronic regulation,
double heat exchanger and
adjustable tail pieces
The GE556Y413 and GE556Y416 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 conguration with two heat exchangers in parallel provides the following advantages:
• parallel and non-intermittent handling of the domestic hot water and heating functions;
• higher safety, the heating circuit is a sealed pressurised system should there be any leaks within property only a small
amount of water will be discharged.
The management of the HIUs parameters is completely electronic.
This allows signicant energy savings, minimizing the ow demand from the primary side 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
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Technical data
• Max. working temperature: 90 °C
• Max. working pressure:
- primary circuit: 10 bar
- DHW secondary circuit: 10 bar
- heating secondary circuit: 4,5 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:
850 l/h @ 80 °C for 56 kW
1030 l/h @ 80 °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 side = 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.
• Double heat exchangers in parallel conguration: heating and DHW production, with priority for DHW production.
• Flow switch for priority of DHW production.
• Expansion vessel, safety valve and high eciency circulator (15/7), comply with ErP Directive (2009/125/EC).
• Motorized three-way priority valve on the delivery of the primary side.
• Motorized two-way modulating valve on the return of the primary side.
• Filter and manual air vent valve on the primary side.
• Safety pressure switch for low pressure on the primary side.
• Heat exchanger and fully insulated piping.
• Painted sheet metal cabinet (RAL9010), with key locking.
Main features
Versions and product codes
Completion codes
• GE552: thermal energy meter
• GE552-2: domestic water meters
• GE551Y135: template with shut-o valves and Ø 22 mm system connections
• GE551Y136: template with shut-o valves and 3/4”M system connections
• Data centralization components via M-Bus, GE552-4 series, or via Wireless M-Bus, GE552-W series
PRODUCT CODE HIU TYPE HEATING SIDE
POWER
DHW HEAT EXCHANGER
NOMINAL POWER TEMPLATE WITH VALVES
GE556Y413 Heating and DHW production 24,5 kW 56 kW GE551Y135/GE551Y136
GE556Y416 Heating and DHW production 24,5 kW 67 kW GE551Y135/GE551Y136
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
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Components
PRIMARY SIDE
1Housing for energy meter temperature probe
2Filter
3Housing for energy meter temperature probe
4Pressure gauge 25 bar
5Heat exchanger for the domestic hot water function
6Manual air vent valve
7Motorized two-way modulating valve
8Brass spacer for thermal energy meter
DHW PRODUCTION
10 Flow switch
11 Brass spacer for water meters
12 Check valve
HEATING
13 Minimum pressure switch
14 Circulator
15 Pressure gauge 6 bar
16 Heat exchanger for heating function
17 Manual air vent valve
18 Expansion vessel
19 Safety valve setted at 4,5 bar
OTHER COMPONENTS
20 Cabinet with electronic regulation unit
21 Remote control / chronothermostat with display
22 External temperature probe
HYDRAULIC CONNECTIONS
ADomestic cold water inlet
BDomestic cold water outlet
CDomestic hot water outlet
DPrimary inlet
EPrimary outlet
FHeating return
GHeating delivery
1
2
11
12
7
13
8
14
15
16
17
3
5
10
6
4
21 22
19
18
20
A B DEFGC

4
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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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
• GE551Y135: template with shut-o valves and Ø 22 mm system connections
• GE551Y136: template with shut-o valves and 3/4”M system connections
GE551Y136
Template with 7 valves (connections from below)
GE551Y135
Template with 7 valves (possibilty of connections from above)
1) Metallic frame
2) Fitting for system charge and flushing
3) Shut-off ball valve to isolate the HIU
4) Joint that allows the connection from above and from below
5) System pipes, Ø 22 mm
2
4
FLUID INLET
FROM ABOVE
FLUID INLET
FROM BELOW
3
1
5
2
43
1
5

5
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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Operation
Motorized three-way priority valve
Motorized two-way modulating valve
Safety valve
Expansion vessel
Manual air vent valve
Circulator
Heat exchanger
Pressure gauge
PPMinimum pressure switch
Temperature probe
FFlow switch
Check valve
EEBrass spacer for thermal energy meter
WWBrass spacer for water meter
F
P
E
W
A B DEFGC
ADomestic cold water inlet
BDomestic cold water outlet
CDomestic hot water outlet
DPrimary inlet
EPrimary outlet
FHeating return
GHeating delivery

6
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
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Secondary circuit: DHW
Cold water inlet (A), cold water outlet (B) and hot water
outlet (C).
The DHW circuit consists of a ow switch, a check valve on
the DCW inlet and two brass spacers for the introduction of
the water meters.
A B C
Primary circuit
Primary inlet (D) and outlet (E). The primary circuit consists
of a lter, a three-way motorized priority valve, an manual
air vent valve, a heat exchanger, a pressure gauge and a
two-way motorized zone valve.
Energy Saving function: the two-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).
DEDE
Primary DHW circuit Primary heating circuit
Secondary circuit: heating
Delivery (G) and return (F). The heating circuit consists of a
heat exchanger, an manual air vent valve, a pressure gauge,
a minimum pressure switch, a safety valve, an expansion
vessel and a high-eciency circulator (ErP 2009/125/EC).
FG

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]
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Constant dierential pressure Δp-c (I, II, III) [RECOMMENDED]
0
0
1
2
0
20
40
60
3
4
5
6
7
8
∆p-v (variabile)
0
10
20
30
40
50
60
70
80
0,5 1,0 1,5 2,0 3,0 4,03,52,5
0 0,5 1,0 1,5 2,0 3,0 4,03,52,5
Q [m3/h]
Q [m3/h]
P1 [W] H [m]
H [kPa]
III
II
I
∆p-v
max.
max.
III II I
0
0
1
2
0
20
40
60
3
4
5
6
7
8
∆p-c (costante)
0
10
20
30
40
50
60
70
80
0,5 1,0 1,5 2,0 3,0 4,03,52,5
0 0,5 1,0 1,5 2,0 3,0 4,03,52,5
Q [m3/h]
Q [m
3
/h]
P1 [W] H [m]
H [kPa]
III
II
I
∆p-c
max.
max.
III
II
I
0
0
2
0
20
40
60
4
6
8
10
Velocità costante (I, II, III)
0
10
20
30
40
50
60
70
80
0,5 1,0 1,5 2,0 3,0 4,03,52,5
0 0,5 1,0 1,5 2,0 3,0 4,03,52,5
Q [m3/h]
Q [m3/h]
P1 [W] H [m]
H [kPa]
III
II
I
III
II
I
Setting the control mode
The LED selection of control
modes and corresponding pump
curves takes place in clockwise
succession.
• Press the operating button briey
(approx. 1 second).
 LEDs display the set control
mode and pump curve.
Air venting
• Fill and vent the system correctly.
If the pump does not vent
automatically:
• Activate the pump venting function
via the operating button: press and
hold for 3 seconds, then release.
 The pump venting function is
initiated and lasts 10 minutes.
 The top and bottom LED rows
ash in turn at 1 second intervals.
 To cancel, press and hold the
operating button for 3 seconds.
• After venting, the LED display shows
the previously set values of the pump.
Fault signals
• The fault signal LED indicates a fault.
• The pump switches o (depending on the fault) and attempts a cyclical restart.
LED FAULTS CAUSES REMEDY
Lights up red
Blocking Rotor blocked
Activate manual restart or
acontact customer service
Contacting/winding Winding defective
Flashing red
Under/overvoltage Power supply too low/high on mains side
Check mains voltage and
operating conditions, and request
customer service
Excessive module
temperature Module interior too warm
Short-circuit Motor current too high
Flashing red/green
Generator operation Water is flowing through the pump hydraulics,
but there is no mains voltage at the pump
Check the mains voltage,
water quantity/pressure
and the ambient conditions
Dry run Air in the pump
Overload
Sluggish motor, pump is operated outside of its
specications (e.g. high module temperature).
The speed is lower than during normal operation
Circulator features

10
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
[e-mail]
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Electrical connections
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
M1
18 17 16
SAFETY
THERMOSTAT
K373 / K373I
REMOTE CONTROL
K480Y002
MULTIZONE
ADDITIONAL
CONTROL
EXTERNAL
TEMPERATURE
PROBE K365P
230 Vac
WARNING. Work on electrical components must be carried out by qualied personnel. Make sure that the power supply is disconnected when making
connections.
Electric technical data
• Electronic board power supply of the satellite: 230 V
• Supply voltage frequency: 50÷60 Hz
• Ambient operating temperature: -20÷60 °C
• Ambient 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
M-Bus
To connect the M-Bus data transfer cable to the
concentrator, refer to the datasheet of the thermal energy
meter used.
Electrical cabinet
B
C
On the back of the HIU there is an IP55 electric box
containing the electronic control board.
To access the electric cabinet (Ref. C) unscrew the two
screws (Ref. A) to release the metal bracket (Ref. B) on
which the electric cabinet is housed.
Then pull out the metal bracket by pulling it up.