Giacomini GE556-2 Series Operating instructions

I
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
Index
1. General information ....................................................................................................................................................... 1
1.1 Warnings ........................................................................................................................................................1
1.2 Versions and product codes. .......................................................................................................................... 1
1.3 Completion codes ......................................................................................................................................... 1
1.4 Main characteristics ......................................................................................................................................... 2
1.5 Technical data ................................................................................................................................................ 2
1.6 Dimensions ....................................................................................................................................................3
2. Operation ....................................................................................................................................................................... 3
2.1 GE556Y401 operational data ......................................................................................................................... 5
2.2 GE556Y401 energy-saving features ............................................................................................................... 6
2.3 GE556Y402 operational data ......................................................................................................................... 7
2.4 GE556Y402 energy-saving features ................................................................................................................ 8
3. Components .................................................................................................................................................................. 9
4. Installation ...................................................................................................................................................................... 10
4.1 Unpacking ..................................................................................................................................................... 10
4.2 Installation set up ...........................................................................................................................................10
4.3 Hydraulic system precautions ..........................................................................................................................10
4.4 Electric system precautions ............................................................................................................................. 10
4.5 Template and satellite installation ....................................................................................................................10
4.6 Start-up ..........................................................................................................................................................12
4.7 Optional: additional unit for sanitary cold water ..............................................................................................13
4.8 Flow and thermal energy meter installation ....................................................................................................13
4.9 Positioning of external temperature probe ...................................................................................................14
GE556Y401 - GE556Y402

II
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
5. Satellite standard presetting ............................................................................................................................................ 15
5.1 Parameters programming: variation from low to high temperature ................................................................15
6. Remote control/chronothermostat with display K480Y002 ............................................................................................ 16
6.1 Technical characteristics .................................................................................................................................16
6.2 Buttons and display ....................................................................................................................................... 16
6.3 LCD display symbols ..................................................................................................................................... 17
6.4 General warnings ...........................................................................................................................................18
6.5 Main characteristics ......................................................................................................................................... 18
6.6 Remote control positioning ........................................................................................................................... 18
6.7 Remote control installation ............................................................................................................................. 19
6.8 Conguring the operational parameters ........................................................................................................ 20
6.9 Disabling the climatic regulator .................................................................................................................... 21
6.10 Selecting the operational mode .................................................................................................................. 21
6.11 Setting time and temperature ....................................................................................................................... 23
6.11.1 Setting the setting ..................................................................................................................... 23
6.11.2 Setting the room temperature DAYTIME ZONE .............................................................. 24
6.11.3 Setting the room temperature NIGHT TIME ZONE ........................................................... 24
6.11.4 Setting the temperature HEATING ............................................................................................... 24
6.11.5 Setting the temperature SANITARY WATER .................................................................................. 25
6.11.6 Setting the external probe KD value ............................................................................................ 25
6.12 Setting the time and temperatures .............................................................................................................. 26
6.12.1 MANUAL mode ........................................................................................................................... 26
6.12.2 AUTOMATIC mode ...................................................................................................................... 26
6.13 Heating weekly program ............................................................................................................................. 27
6.13.1 Displaying the heating program .................................................................................................27
6.13.2 Modifying the heating program ...................................................................................................27
6.14 Provisional modication of room temperature set point ...............................................................................28
6.15 Displaying the values ....................................................................................................................................28
6.15.1 Displaying the preset room temperature ................................................................................... 28
6.15.2 Displaying the sanitary water probe temperature ...................................................................... 29
6.15.3 Displaying the delivery probe temperature ................................................................................. 29
6.15.4 Displaying the external probe temperature ................................................................................ 29
6.15.5 Displaying the system water pressure ......................................................................................... 29
6.16 Restoring default values ...............................................................................................................................30
6.17 Full reset ....................................................................................................................................................... 30
6.18 Ambient anti-freezing function ..................................................................................................................... 30
6.19 Anomaly alerts ............................................................................................................................................. 31
6.19.1 Restartable anomalies .................................................................................................................. 31
6.19.2 Non-restartable anomalies .......................................................................................................... 32
7. Circulator typical curves ................................................................................................................................................. 32
8. Electric installations .......................................................................................................................................................... 33
9. Troubleshooting ...............................................................................................................................................................34
9.1 Sanitary hot water temperature too low ......................................................................................................... 34
9.2 Sanitary hot water temperature too high ...................................................................................................... 34
9.3 Heating circuit water temperature too low ..................................................................................................... 35
9.4 Heating circuit water temperature too high .................................................................................................. 35
9.5 Heating circuit down ....................................................................................................................................... 36
9.6 Noise in the heating system ...........................................................................................................................36
10. Inspections and service ................................................................................................................................................. 37
10.1 Recommended service operations ............................................................................................................... 37
11. Spare parts ....................................................................................................................................................................38
11.1 GE556Y401 - GE556Y402 satellite spare parts ................................................................................................ 38
11.2 GE551Y074 template spare parts ..................................................................................................................39
12. Compliance statements ................................................................................................................................................. 39

1
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
1. General information
GE556Y401 and GE556Y402 satellites enable metering thermal energy consumptions when heating and the production of
Sanitary Hot Water (SHW) in modern autonomous systems with heat centralized production (eg. teleheating). Control of the
satellite parameters is fully electronic. The various parameters can be entered through a remote device which works also as
programmable chronothermostat. The satellites oer great energy saving by minimizing the ow request from the primary side
and reducing the delivery temperature.
1.1 Warnings
• Installation must be carried out by qualied personnel authorized by the building administration body.
Comply with the regulations in terms of use (installation, tting, etc...), operation, re-gauging and replacement of
metering units. Also refer to assembly instructions included with every metering unit.
• Risk of scalds and electric shocks. Only qualied personnel authorized by the building administration body should
access the satellite. Misuse may cause serious injuries to people and damage the system.
• An excessive temperature of the sanitary hot water may cause scalds to people; too cold water may lead to undesired
bacterial growth within the hot water system.
• Some satellite parts may overheat, do not touch them.
• Before connecting the satellite to the power line, make sure it has been properly lled with water. Starting the satellite
without water inside may damage the circulator and the satellite.
• When starting up the satellite, make sure no one uses the system water till the water temperature has been adjusted
in order to prevent scalds.
• To prevent polluting agents from entering the system, rst open the primary circuit valves and then the return valves
when starting up the satellite. Open the valves slowly to prevent pressure peaks.
• Do not cut o the electric power from the control panel. This may damage the circulator, the valve actuators, etc...
• The cleaning frequency of the sanitary water exchanger strongly depends on the hardness of the supply sanitary cold
water.
• With water hardness values higher than 15°f we recommend using anti-scaling devices to be selected based on the
water characteristics.
• To enhance the resistance to limestone crusting, we recommend adjusting the sanitary water temperature at a value
very close to the value of actual use.
• Clean the sanitary water exchanger at the end of the rst year; then, based on the limestone crusting status, this
period can be extended to two years.
• 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).
1.2 Versions and product codes
Code Type Heating side power SHW exchanger nominal power Template with valves
GE556Y401 Heating and SHW production 26 kW 58 kW GE551Y074
GE556Y402 Heating and SHW production 26 kW 67 kW GE551Y074
Warning.
• Every satellite includes:
- a label with the satellite model identication data;
- a label proving its compliance with electric and hydraulic tests;
• Every satellite is identied by a serial number both inside and on the
packaging.

2
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
1.3 Completion codes
The components listed below may be installed on every satellite:
• Thermal energy metering unit series GE552
• Sanitary hot water metering unit series GE552-2
• Template with 6 interception valves and 3/4”connections: code GE551Y074
• Optional unit for sanitary cold water: code GE550Y001
1.4 Main characteristics
• SET POINT electronic thermoregulation to control SHW and heating temperatures.
• Remote control with chronothermostat function to control the parameters, with display.
• External temperature probe for climatic compensation.
• Heat exchanger for SHW instantaneous production.
• Control ow switch for SHW production priority.
• Motorized 3-way priority valve, on delivery of primary side.
• Motorized 2-way modulating valve, on return of primary side.
• Filter and manual air vent valve on the primary side.
• Low-pressure safety pressure switch on primary side.
• Thermal and electric safety valve on heating side.
• 3/4“M connections.
• 15/6 self-modulating circulator, 130 mm central distance, compliance with ErP (2009/125/CE).
• Heat exchanger and fully-insulated pipes.
• WRAS certied components for sanitary circuit.
• Spacer for metering unit installation.
• Varnished metal sheet cabinet (RAL9010) with key lock.
1.5 Technical data
• Max. working temperature: 90 °C
• Max. working pressure of primary circuit: 10 bar
• Max. working pressure of SHW secondary circuit: 10 bar
Warning.
Max. working dierential pressure for primary side = 4 bar (priority valve)
• Temperature range of heating secondary circuit: low temperature 25÷45 °C (factory original setting)
high temperature 25÷85 °C
• Temperature range of SHW secondary circuit: 30÷60 °C (SET POINT 50 °C)
• Primary nominal ow: 1070 l/h @ 75 °C for 58 kW
1150 l/h @ 75 °C for 67 kW
• Electric power: 230 V; 50-60 Hz
• Weight: ~25 kg

3
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
1.6 Dimensions
Template Satellite Legend
B
A
CDEFG
102450
721
169 94
105 60 60 60 60 60 45
450
390 3030 450
105 60 60 60 60 60 45
630 180
47
ABCEDFG
X
X: Cablecover
A: Sanitary cold water outlet
(optional)
B: Sanitary cold water inlet
C: Sanitary hot water outlet
D: Primary inlet
E: Primary outlet
F: Heating return
G: Heating delivery
Dimensions in mm
2. Operation
EDGF
CB
F
P
E
W
Legend
Heat exchanger FFFlow switch
WWBrass spacer for SHW metering unit Manual air vent valve
Motorized 2-way modulating valve EEPlastic spacer for energy metering unit
Temperature probe Motorized 3-way priority valve
Motorized 2-way zone valve Circulator
By-pass lockshield valve
PP
Minimum pressure pressostat
A: Sanitary cold water outlet (optional)
B: Sanitary cold water inlet
C: Sanitary hot water outlet
D: Primary inlet
E: Primary outlet
F: Heating return
G: Heating delivery

4
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
Primary circuit
E
D
Fig. 1
Inlet (D) and return (E). The primary circuit includes an inspectionable lter, a motorized 3-way
priority valve, a manual air vent valve, a heat exchanger, a pressure gauge, a minimum pressure
switch and a motorized 2-way modulating valve.
Energy-saving function: the 2-way modulating valve, controlled by the satellite electronic control,
limits to the minimum the ow request by the primary circuit to obtain the SET POINT preset
temperature. The priority valve diverts the ow into the heat exchanger (in case of SHW request:
SHW ow switch activated) or into the heating system.
The thermal energy metering unit can be installed in place of the plastic spacer by inserting its
temperature probe in the housing (1).
Heating circuit
E
DG
F
Fig. 2
Delivery (G) and return (F). The heating circuit includes a motorized 2-way zone valve working
as thermal safety device (the valve interrupts the ow within the system when the delivery
temperature exceeds the temperature set on the remote control - SET POINT - by at least 5 °C),
an adjustable by-pass lockshield valve and a high energy eciency circulator (ErP 2009/125/CE).
Sanitary hot water circuit
Cold water inlet (B), hot water outlet (C) and cold water outlet (A - optional). The SHW circuit
includes a ow switch and a brass spacer to install the liter metering unit. A sanitary hot water
metering unit can be installed in place of the brass spacer.
BC
A
Fig. 3

5
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
2.1 GE556Y401 operational data
Primary circuit
Primary circuit for SHW production, modulating valve fully open (see g.1)
1,00
0,10
0,01
0,1 1,0 10,0
Q [m3/h]
Δp [bar]
Kv = 2,08
Heating primary circuit, lockshield valve and modulanting valve both open (see g.2)
1,00
0,10
0,010,1 1,0 10,0
Q [m3/h]
Δp [bar]
Kv = 1,9
Heating
Heating Flow [l/h]
Primary circuit outlet temperature (35-30 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 8,8 170 l/h
(30 °C)
190 l/h
(30 °C)
215 l/h
(30 °C)
250 l/h
(30 °C)
Primary circuit data for delivery temperature 35-30 °C
Heating Flow [l/h]
Primary circuit outlet temperature (45-40 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 8,8 215 l/h
(40 °C)
250 l/h
(40 °C)
300 l/h
(40 °C)
375 l/h
(40 °C)
Primary circuit data for delivery temperature 45-40 °C
Heating Flow [l/h]
Primary circuit outlet temperature (60-45 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 26,3 750 l/h
(45 °C)
900 l/h
(45 °C)
1130 l/h
(45 °C) -
Max 1200 21 ---1200 l/h
(45 °C)
Primary circuit data for delivery temperature 60-45 °C
Heating Flow [l/h]
Primary circuit outlet temperature (70-55 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1200 21 900 l/h
(55 °C)
1200 l/h
(55 °C) - -
Primary circuit data for delivery temperature 70-55 °C
Heating circulator diagram - Circulator with constant Δp (see g.2)
00 200 400 600 800 1000 1200 1400 1600
1
2
3
4
5
6
7
∆p [m H2O]
Q [l/h]
SHW production
Sanitary Hot Water Flow [l/h]
Primary circuit outlet temperature (SHW 15-50 °C)
l/min l/h kW 75 °C 70 °C 65 °C 60 °C
12 720 29 495 l/h
(24 °C)
550 l/h
(24 °C)
665 l/h
(27 °C)
850 l/h
(30 °C)
15 900 37 630 l/h
(25 °C)
720 l/h
(26 °C)
850 l/h
(28 °C)
1050 l/h
(30 °C)
17 1020 41,5 730 l/h
(26 °C)
830 l/h
(27 °C)
1000 l/h
(29 °C)
1200 l/h
(30 °C)
20 1200 49 875 l/h
(27 °C)
1000 l/h
(28 °C)
1200 l/h
(30 °C)
1450 l/h
(31 °C)
22 1320 54 980 l/h
(28 °C)
1100 l/h
(28 °C) - -
24 1440 58,8 1070 l/h
(28 °C)
1200 l/h
(28 °C) - -
Primary circuit data for SHW production 15-50 °C Hydraulic data for sanitary hot water circuits (sse g.3)
0,01
0,1 1,0 10,0
0,10
1,00
Δp [bar]
Q [m3/h]
Kv = 2,22

6
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
2.2 GE556Y40 energy saving features
Low return temperatures of primary circuit when used for sanitary water
60 65 70 75
Primary delivery temp. [°C]
20
22
24
26
28
30
32
Primary return temp. [°C]
12 l/min
15 l/min
17 l/min
20 l/min
22-24 l/min
Reduced ows requested to the primary circuit, when heating
- High temperature:
60 65 70 75
Primary delivery temp. [°C]
600
700
800
900
1000
1100
1200
1300
Primary flow rate [l/h]
26 kW
∆T (60-45 °C)
Q=1500 l/h
21 kW
∆T (70-55 °C)
Q=1200 l/h
- Low temperature:
60 65 70 75
Primary delivery temp. [°C]
100
150
200
250
300
350
400
450
500
550
Primary flow rate [l/h]
9 kW
∆T (35-30 °C)
Q=1500 l/h
9 kW
∆T (45-40 °C)
Q=1500 l/h

7
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
2.3 GE556Y402 operational data
Primary circuit
Primary circuit for SHW production, modulating valve fully open (see g.1)
1,00
0,10
0,01
0,1 1,0 10,0
Q [m3/h]
Δp [bar]
Kv = 2,13
Heating primary circuit, lockshield valve and modulating valve fully open (see g.2)
1,00
0,10
0,010,1 1,0 10,0
Q [m3/h]
Δp [bar]
Kv = 1,9
Heating
Heating Flow [l/h]
Primary circuit outlet temperature (35-30 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 8,8 170 l/h
(30 °C)
190 l/h
(30 °C)
215 l/h
(30 °C)
250 l/h
(30 °C)
Primary circuit data for delivery temperature 35-30 °C
Heating Flow [l/h]
Primary circuit outlet temperature (45-40 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 8,8 215 l/h
(40 °C)
250 l/h
(40 °C)
300 l/h
(40 °C)
375 l/h
(40 °C)
Primary circuit data for delivery temperature 45-40 °C
Heating Flow [l/h]
Primary circuit outlet temperature (60-45 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1500 26,3 750 l/h
(45 °C)
900 l/h
(45 °C)
1130 l/h
(45 °C) -
Max 1200 21 ---1200 l/h
(45 °C)
Primary circuit data for delivery temperature 60-45 °C
Heating Flow [l/h]
Primary circuit outlet temperature (70-55 °C)
Circulator
speed Flow [l/h] Power
[kW] 75 °C 70 °C 65 °C 60 °C
Max 1200 21 900 l/h
(55 °C)
1200 l/h
(55 °C) - -
Primary circuit data for delivery temperature 70-55 °C
Heating circulator diagram - Circulator with constant Δp (see g.2)
00 200 400 600 800 1000 1200 1400 1600
1
2
3
4
5
6
7
∆p [m H2O]
Q [l/h]
SHW production
Sanitary Hot Water Flow [l/h]
Primary circuit outlet temperature (SHW 10-50 °C)
l/min l/h kW 75 °C 70 °C 65 °C
12 720 33,5 510 l/h
(18,5 °C)
580 l/h
(20 °C)
670 l/h
(22 °C)
15 900 42 660 l/h
(20,5 °C)
750 l/h
(22 °C)
880 l/h
(24 °C)
17 1020 47,5 770 l/h
(22 °C)
880 l/h
(23,5 °C)
1020 l/h
(25 °C)
20 1200 56 940 l/h
(23,5 °C)
1050 l/h
(24,2 °C) -
22 1320 61,5 1040 l/h
(24 °C)
1160 l/h
(24,6 °C) -
24 1440 67 1150 l/h
(25 °C)
1280 l/h
(25 °C) -
Primary circuit data for SHW production10-50 °C Hydraulic data for sanitary hot water circuits (see g.3)
0,01
0,1 1,0 10,0
0,10
1,00
Δp [bar]
Q [m3/h]
Kv = 2,32

8
0795EN January 2020
User and maintenance manUal
ElEctronic rEgulation satEllitEs
gE556Y401, gE556Y402
gE556-2 sEriEs
2.4 GE556Y402 energy-saving features
Low return temperatures of primary circuit when heating
Primary return temp. [°C]
Primary delivery temp. [°C]
Flows requested to the primary circuit reduced when heating
- High temperature:
60 65 70 75
Primary delivery temp. [°C]
600
700
800
900
1000
1100
1200
1300
Primary flow rate [l/h]
26 kW
∆T (60-45 °C)
Q=1500 l/h
21 kW
∆T (70-55 °C)
Q=1200 l/h
- Low temperature:
60 65 70 75
Primary delivery temp. [°C]
100
150
200
250
300
350
400
450
500
550
Primary flow rate [l/h]
9 kW
∆T (35-30 °C)
Q=1500 l/h
9 kW
∆T (45-40 °C)
Q=1500 l/h