HIU Brochure - G3 G4 Eco - June 11

7/21/2019 HIU Brochure - G3 G4 Eco - June 11

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Taking comfort control in

apartments and multi-use

dwellings to a higher level

CourtesyofParkridge-www.d

ickensheathvillage.com

Giacomini Heat Interface Units(with optional Energy & Water Meters)

G3 & G4 ECO

G4 Eco Twin


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A range of models to suit every application

G3 Twin Heat Exchanger 44kW and 58kW G3 Single Heat Exchanger 44kW

G4 Eco Twin Heat Exchanger 44kW and 58kW G4 Eco Single Heat Exchanger 44kW


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Jig bracket supplied as standard

First fix can be carried out without the heat

interface unit being on site. Prevents site

theft and site damage. No need to purchase

unit until it is required, easing cash flow.

Jig bracket is supplied as standard with

all relevant isolating valves

No hidden additional costs.

Jig bracket comes with Y strainers

supplied

Stops any debris in the system entering the

unit, preventing damage, blockages or any

reduction of the efficiency of the plate heat

exchangers.

Jig bracket supplied as standard with Part

L compliant WRAS approved filling loop.No hidden additional costs.

Jig bracket available with a 50mm offset

This leaves a 50mm void at the rear of the

unit to enable pipework to run behind the

main body of the unit, making installation

faster, easier and aesthetically pleasing.

Domestic hot water (DHW) and central

heating (CH) circuits run in parallel

No troublesome diverter valves, which are

renowned for causing problems, are used or

needed, giving a much simpler operation.

Stainless steel heat exchangersLess likely to suffer from scale which can

reduce efficiency and can, in extreme cases,

block the waterway completely.

Twin heat exchanger model gives both

indirect CH and DHW

Should the property develop a leak in the

system, only the water inside the property

would be expelled, lessening likely damage.

Also instantaneous hot water availability, no

storage or cylinder required.

Single plate heat exchanger models ideal for

direct DHW, where a cylinder or hot water

storage is preferred, or where a cylinder is

already in place, e.g. the replacement market.

Optional energy meter

Allows each tenant to be billed for the energy

he or she consumes.

Optional water meter

Water meter can be housed securely inside

the HIU when fitted outside the apartment.

Built-in dynamic balancing and

commissioning valve

Balances the system throughout the

apartment block when a large number of

units are installed, maintaining optimum

performance in each apartment.

HIU housed in a metal, powder-coated

casing, which is lockable

Aesthetically pleasing and secure.

Lightweight and compact

Can be housed in a cupboard. Easy to handleand install.

E: [email protected] W: www.giacomini.co.uk

The New Giacomini G3 & G4 Eco Heat InterfaceUnits for communal heating systems

Main Benefits AT A GLANCE

Helping to minimise the heat source

requirement and further reduce energy

consumption

The G4 Eco has, as standard, a motorized valve

fitted that can shut off the heat exchanger for

heating when not in use to save energy and cut

fuel bills. It also has an option to fit a further

motorized valve on the domestic hot water heat

exchanger. This combination of valves

minimizes the energy extracted from the

primary flow, allowing a greater diversity factor

and a smaller heat source requirement when

sizing the boiler. This can result in significant

energy savings, lower emissions and is ideal for

use with renewable technologies, where the

energy produced is limited.

Additional Benefits of the G4 ECOG4 Eco Twin

G3 Twin


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With no need for a gas supply, flues, or hot water cylinders,

the new heat interface unit from Giacomini provides all the

benefits of a combi boiler without the combustion.

Compact in size and simple to install, this versatile unit

controls and measures hot water and heating usage in

apartments supplied from a communal boiler system. It

delivers major benefits to everyone concerned, from the

building contractor and installer to the tenants and

landlords.

For the building contractor and the installer, the advantages

are simplicity of installation; theres no need for a gas supply,

flue or hot water cylinder and little or no servicing

requirement once installed. With no need for hot water

storage, Giacominis neat and compact heat interface unit

its just 450mm wide by 670mm high and 200mm in depth

also saves on valuable space, compared to a conventional

individual heating system.

For the tenants and the landlord there are major advantages.

The new heat interface unit meets the need to control and

monitor the heating and sanitary water consumption of

tenants in flats, apartments or multi-dwelling buildings,

according to their individual needs.

Monitoring energy consumptionOne of the key advantages for the tenant is the direct linking

of their energy bill to personal consumption. For the landlord,

the key advantage is the ability to remotely monitor and

analyse the energy consumption of both individual users and

the overall system through a special interface fitted within the

unit. This uses the latest M-BUS communications technology,

standardised throughout Europe.

The principal difference between the heat interface unit and a

conventional individual boiler is that the usual heating source

is replaced with a heat exchanger fed from a central

communal hot water supply. A primary plate heat exchanger is

used for the provision of heating and a secondary plate heatexchanger for domestic hot water production. These are

configured as a sealed system in the heat interface unit,

together with an expansion tank, safety valve and filling loop.

The result gives each Giacomini unit the effectiveness and

flexibility of a combi boiler, without the need for individual

combustion.

Accurate measurement of energy usage is obtained via

compact volumetric meters, which are of a single jet turbine

type that provide high precision and reliability in compliance

with standard EN 1434. Well engineered, all components are

installed in a durable zinc-plated casing, supplied with fittings

for easy wall mounting.

Advantages for the building contractor

Simplicity of installation no gas supply, no flues and

no cylinders

Jig Bracket, Valves, Y Strainer and WRAS approved Filling

Loop supplied as standard (see page 5)

Saves space no hot water cylinder required

Lower servicing costs

Advantages for the tenant

The tenant is aware that bills are linked directly to personalconsumption

Optional energy metering display allows tenants to see how

much energy is being consumed and to individually adapt to

changing circumstances

Greater efficiencies for individual users lowers both costs

and emissions

Advantages for the landlord

Through remote monitoring, Giacomini heat interface units

provide the landlord with comprehensive data for analysis

with a consequent major energy saving opportunity Possibility of central conversion to other kinds of fuel,

without major cost implications for satellite units

Adaptable for remote heating control

More secure and less intrusive, through centralised

data collection

Maintenance costs shared across all residents


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Data centralisation

The direct reading of measured data is possible on each

metering device, using an analogue or digital display. However,

this may not conform to tenants privacy agreements, where

metering units are installed in common areas or outside

apartments.

Additionally, direct reading of individual meters is time

consuming, subject to human error and requires installation

of metering units in positions easy to access. For these

reasons, Giacomini metering modules and heat interface units

are provided with metering devices fitted with a special

interface for M-BUS communication, the European standard

for remote reading of energy meters. All data is detected

electronically so that it can be sent via the communication

M-BUS.

A concentrator periodically interrogates all M-BUS devices,

collecting consumption data and making it available locally

or remotely, for sharing and analysis. Data reading becomes

fast, convenient and possible at all times, even when tenants

are out.

All the benefits of a

combi boiler without

the combustion

Optional accessories

Sanitary water meter (M-BUS)

For the monitoring of water consumption via M-BUS to central

collection point.

Other meter options, such as wireless / pre-pay meters, are

available on request.

Energy meter (M-BUS)

For the monitoring of energy consumption sending data to a

central collection point via M-BUS.


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1 Energy meter (optional)

1a = volumetric reader

1b = meter display

2 Sanitary water meter (optional)

3 Insulation in expanded PEx (optional)

4 Electrical motor for the zone valve for DHW

production (optional)

5 Jig with interception valves

Insulation panel


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G4 Single

G4 Twin

G3 TwinG3 Single

Operation

Technical data - All models - G3 & G4

Maximum working temperature of the primary circuit and

secondary circuits (heating and sanitary): 90C

Maximum working pressure of the primary circuit and

secondary sanitary: 10 bar

Maximum working pressure of the heating secondary circuit:

3 bar (safety valve setting)

Nominal primary flow: 1000 1250 L/h (depending on the

required sanitary power and the type of heating, by radiant

floor or by radiators)

Versions and part numbers

Part number Type Heat exchanger

nominal power

G3 Single Heating 44kW

G3 Twin Heating and DHW production 44kW

G3 Twin Heating and DHW production 58kW

G4 Eco Single Heating 44kW

G4 Eco Twin Heating and DHW production 44kW

G4 Eco Twin Heating and DHW production 58kW

Table 1 Codes



Sanitary:cold inlet (Pages 9/10: Fig.5-C), cold outlet (Fig.5-D),

hot outlet (Fig.5-E). In place of the spacer (Fig.5-9), a sanitary

water meter can be installed.

Heating:inlet (Fig.5-F) and outlet (Fig.5-G). The circuit is

simply composed of exchanger and circulator. As it deals with

a closed circuit, the equipment is completed by: expansion

vessel, safety valve, manometer.

Primary:flow (Fig.5-B) and return (Fig.5-A). The energy meter

can be installed in place of the spacer (Fig.5-8, installing the

inlet temperature probe in the appropriate housing (Fig.5-10).

For G3-G4 single, the primary circuit operates only for the

heating circuit; the primary circuit is composed of a balancing

valve and a differential pressure controller that work togetherto perform automatic balancing (see Figure 3 below); the heat

exchanger and the thermostatic valve with remote bulb

regulate the power for the heating circuit. The zone valve can

manage the heating by means of a chrono-thermostat.

For G3-G4 twin, the primary circuit is divided in two

symmetrical arms: one is for the heating handling, the other is

for the production of hot sanitary water. These two arms are

completed by: heat exchanger, thermostatic valve with remote

bulb, the balancing valve, and differential pressure controller.

The balancing valve and a differential pressure controller

valve work together to perform the automatic balancing (see

Figure 3). The zone valve can manage the holiday function(motor of the zone valve is optional).

Figure 4 Balancing devices

Differential pressure controllerNOTE: Setting scale in RED

Static balancing valve

NOTE: Setting scale in WHITE

Figure 3 Automatic balancing operation for the primary

circuit.

(QA = Primary flow rate; QB = Secondary flow rate;

QC = Bypass flow rate)


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Components G3

Table 2 Components (see Figure 5)

Figure 5 Components

A = Primary outlet

B = Primary inlet

C = Cold water inlet

D = Cold water outlet

E = Hot water outlet

F = Heating inlet

G = Heating outlet

1 Heat exchanger, heating

function

2 Manual air vent, primary

circuit

3 Expansion vessel, heating

circuit

4 Primary balancing -

differential pressure

controller valve

5 Primary balancing staticbalancing valve

6 Heat exchanger, sanitary

hot water function

7 Backflow preventer

8 Spacer pipe for energy

meter

9 Spacer pipe for sanitary

water meter

10 Flow temperature probe

housing for energy meter

11 Manual air vent, heating

circuit

12 Thermostatic valve, heating

function

13 Electric box

14 Primary balancing for

heating circuit static

balancing valve

15 Thermostatic valve sensor

heating function

16 Thermostatic valve,

sanitary hot water function

17 Circulator, heating function

18 Thermostatic valve,sanitary hot water function

19 Manometer heating

function

20 Safety valve, heating

circuit



Components G4 Eco

Figure 5 Components

Table 2 Components (see Figure 5)

A = Primary outlet

B = Primary inlet




F = Heating inlet

G = Heating outlet

1 Heat exchanger, heating

function

2 Manual air vent, primary

circuit

3 Primary balancing for

heating circuit static

balancing valve

4 Primary balancing -

differential

5 Primary balancing static

balancing valve

6 Heat exchanger, sanitary

hot water function

7 Backflow preventer

8 Spacer pipe for energy

meter

9 Spacer pipe for sanitary

water meter

10 Flow temperature probe

housing for energy meter

11 Manual air vent, heating

circuit

12 Thermostatic valve, heating

function

13 Electric box

14 Motorized zone valve

heating function pressure

controller valve

15 Expansion vessel, heating

circuit


heating function

17 Zone valve for DHW

production isolation

18 Thermostatic valve,


19 Circulator, heating function



21 Manometer heating

function

22 Safety valve, heating

circuit


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Heating

Adjust the heating temperature through the thermostatic

head (Fig.5-12).

Warning!

Provide for a safety thermostat for the lowtemperature heating applications.

If you note that the rating temperature of the heating is

higher than the set value, the flow of the primary may be

too high and the thermostatic head is not able to close. In

this case, open the differential pressure controller valve

(Fig.5-4). About the regulation, see Page 8, Figure 4.

To balance the heating production functions, you may work

with the static balancing valve (Page 9 Fig.5-5, Page 10

Fig.5-3) and the primary balancing valve (Fig.5-5) but the

latter also affects the hot water production.

Finally it is possible to change the heating power by

modifying the circulator speed that has 3 speeds (Page 9

Fig.5-17, Page 10 Fig.5-19).

Controls and maintenance

Heating circuit pressure

Periodically adjust the pressure of the heating circuit by

means of the manometer (Page 9 Fig.5-19, Page 10 Fig.5-21).

The pressure value must be maintained over 1 bar (pressure

values under 1 bar can damage the circulator by cavitation).

A device for filling is supplied (the satellite has no internal

filling loop). During the filling, the safety valve may activate

(Page 9 Fig.5-20, Page 10 Fig.5-22).

Warning: danger of burns.

In order to eliminate the air in the heating circuit, use themanual air vent (Fig.5-2 and Fig.5-11).

Safety valve

Periodically work the manual hand wheel of the safety valve

(Page 9 Fig.5-20, Page 10 Fig.5-22) for a good service of the

valve. Be careful to check for leakage of the water from the

discharge.

Warning: danger of burns.

Warning!

The set value represents the rating value; the

thermostatic head is not as precise as a

thermostatic mixer and in transitory phases (unexpected

openings) does not guarantee the precise set value, youmay have even +/-15C as regards to the set value, for a

short period of time.

Adjustments

Sanitary hot water temperatureAdjust the temperature of the sanitary hot water using the

thermostatic head (Fig.5-12):

Position 23 34 45 56 67 Fully Open

Temperature 23C 34C 45C 56C 67C Maximum

Position 23 34 45 56 67 Fully Open

Temperature 23C 34C 45C 56C 67C Maximum

Warning!

Danger of burns. The thermostatic head for

the regulation of the sanitary hot watertemperature serves to set the temperature

rating value.

To avoid burns, provide for a thermostatic mixer

downstream of the satellite.

If you note that the rating temperature of the sanitary hot

water is higher than the set value, the flow of the primary

may be too high and the thermostatic head is not able to

close. In this case, open the differential pressure controller

valve (Fig.5-4). About the regulation, see Page 8, Figure 4.

To balance the sanitary hot water production functions,

you may work with the primary balancing valve (Fig.5-5).



Wiring for G3 modelsWiring for G4 models

Electrical connections

On top right of the satellite there is an electrical box IP55 (see

Fig.5-13) containing the terminals (see Figure 7 below) for the

electrical connections for the M-BUS (optional) devices and for

the control and supply of the circulator (Page 9 Fig.5-17, Page

10 Fig.5-19).

Technical data

Supply voltage for circulator: 230V +10% / -15%: 50Hz 5%

Maximum electrical power for the circulator on the three

speeds = 132W, 92W, 62W.

Maximum electrical power for one electrical motor of the

zone valve = 3.5W (1A).

External connections

External power supply (230V~) should be connected to the

terminal box to terminals 7 and 8, 10 and 11 in Figure 7. Use a

two-conductor cable with 0.5mm2 section. No polarity need be

complied with for the connection of the terminals.

Functioning consent

Concerning the connection of the functioning consents, the

consent should be given through the normally open contact

(N.O. contact, see Figure 7). For the connection of thefunctioning consent (terminals 6, 7 and 9, 10) use a two-

conductor cable with 0.5mm2 section. No polarity should be

complied with for the connections.

M-BUS

For the connection of the M-BUS data transmission cable to

the concentrator use terminals 1 (RED conductor L1+) and to

terminal 2 (GREEN conductor L2-) of the terminal box, see

Figure 7.

Figure 7 Electrical connections of the terminal box


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Figure 10 Primary circuit for hot sanitary water production.

Pressure losses depending on the setting of the static

balancing valve (Fig.5-5). Legend. 1, 2, 3, 4, 5: see scale on the

body by the handle of the valve (Page 8 Fig.4).

Figure 11 Primary circuit for heating.

Pressure losses depending on the setting of the static

balancing valve (Page 9 Fig.5-14, Page 10 Fig.5-3) when the

static balancing valve (Fig.5-5) is completely open.

Legend. -1/2, -3/4, -1, -2 = number of revolutions starting from

closed; f.o. = full open.

Primary circuit - All models

Heating

Figure 8 Heating flow rate diagrams.

Figure 9 Hydraulic data for hot and cold sanitary

water circuits (Ref. See table 7)

Sanitary circuit

Table 7 Hydraulic data for hot and cold sanitary water circuits.

Kv Decription Ref fig. 2

1.85 Hot sanitary circuit C-D

4.41 Cold sanitary circuit C-E


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Heating Radiators Flow Rate (l/h) and Primary Outlet

Temperature (radiators 65-55C)

circular flow rate power 80C 75C 70C

speed m3/h (kW)

I 1 11.6 430 580 975

(56.6C) (57C) (59C)

II 1.25 14.5 550 750 1320

(57.2C) (58C) (60C)

III 1.5 17.4 680 950 1750

(67.8C) (59C) (61C)

Table 6 Primary circuit and radiators heating for

satellites with standard heat exchanger.

Heating

Heating - Radiant Floor Flow Rate (l/h) and Primary Outlet

Temperature (radiant floor 45-39C)

circular flow rate power 75C 70C 65C 60C

speed m3/h (kW)

I 1 7.0 240 300

(39C) (39C)

II 1.25 8.7 240 300 375

(40C) (40C) (40C)

III 1.5 10.5 290 350 450

(40C) (40C) (40C)

Table 7 Primary circuit and radiant floor heating for

satellites with standard heat exchanger.

Heating Radiators Flow Rate (l/h) and Primary Outlet

Temperature (radiators 65-55C)

circular flow rate power 80C 75C 70C

speed m3/h (kW)

I 1 11.6 410 525 780

(55.4C) (55C) (57C)

II 1.25 14.5 515 670 1010

(55.6C) (56C) (57C)

III 1.5 17.4 620 810 1250

(55.8C) (56C) (58C)

Table 8 Primary circuit and radiators heating for

satellites with large heat exchanger.

Heating

Heating - Radiant Floor Flow Rate (l/h) and Primary Outlet

Temperature (radiant floor 45-39C)

circular flow rate power 75C 70C 65C 60C 55C

speed m3/h (kW)

I 1 7.0 220 280 380

(39C) (39C) (39C)

II 1.25 8.7 290 365 480

(40C) (40C) (39C)

III 1.5 10.5 300 350 430 590(39C) (40C) (39C) (39C)

Table 9 Primary circuit and radiant floor heating for

satellites with large heat exchanger.

Sanitary Flow Rate (l/h) and Primary Outlet

Temperature (sanitary 10-50C)

l/min l/h kW 80C 75C 70C 65C 60C

12 720 29 510 580 690 865 1210

(22.9C) (25C) (27.9C) (31.4C) (36C)

15 900 37 670 775 935 1200

(25.7C) (28.1C) (31.1C) (34.8C)

17 1020 41 785 920 1120 1480

(27.5C) (30.2C) (33.2C) (37.1C)

20 1200 49 975 1150 1430

(30.2C) (32.9C) (36.1C)

Sanitary Flow Rate (l/h) and Primary Outlet

Temperature (sanitary 10-50C)

l/min l/h kW 80C 75C 70C 65C 60C

12 720 29 450 495 565 660 825

(15.4C) (16.9C) (18.7C) (21.3C) (24.9C)

15 900 37 575 640 730 870 1105

(16.8C) (18.3C) (20.4C) (23.3C) (27.2C)

17 1020 41 660 740 850 1010 1300

(17.7C) (19.4C) (21.6C) (24.4C) (28.5C)

20 1200 49 790 890 1030 1250

(18.9C) (20.7C) (21.3C) (26.3C)

24 1430 58 970 1100 1280

(20.6C)(22.6C) (25.1C)

E: [email protected] W: www.giacomini.co.uk 14

Large heat exchanger

Hot sanitary water production

Table 4 Primary circuit and hot water production for

satellites with standard heat exchanger

Hot sanitary water production

Table 5 Primary circuit and hot water production for

satellites with large heat exchanger

Small heat exchanger


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A = Primary outlet

B = Primary inlet




F = Heating inlet

G = Heating outlet

Dimensions - All models

Figure 16 Dimensions (mm)

670

670

200450

W

D

200450

Normative references

UNI EN 1434

Measuring Instruments Directive 2004/22/EC (MID) EN 60751

EN 61107

Ref. Fig. 5 Component Certificate number

- Gaskets 0512513

6 Heat exchanger 0712063

8 Spacer 0507502

7 Backflow preventer 0907056

WRAS certifications

Table 13 WRAS certifications.

Thermal hydraulic performance

Maximum working temperature of the primary circuit and

secondary circuits (heating and sanitary): 90C

Maximum working pressure of the primary circuit and

secondary sanitary: 10 bar

Maximum working pressure of the heating secondary circuit:3 bar (safety valve setting)

Additional information

For further information please contact the following website:

www.giacomini.co.uk

or contact the technical department:

T: 01454 311012

F: 01454 316345

E: [email protected]

This communication has an indicative value. Giacomini SpA reserves the

right to make at any time, without notice, changes for technical or business

reasons to the articles in this communication. The information contained in

this technical communication does not exempt the user from following

strictly the regulations and rules of good existing practice.


17/20E: [email protected] W: www.giacomini.co.uk 16

Notes


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Notes


19/20E: [email protected] W: www.giacomini.co.uk 18

COMMERCIAL UNDERFLOOR HEATING

Visit Giacominis

NEW updated website

www.giacomini.co.uk

or call 01454 311012

for an information pack

We design it, manufacture it and then install it

Single point responsibility for the whole system

Pipework guaranteed for 50 years

Brass components guaranteed for 10 years

Full technical assistance at every stage

All thecurves are

in the rightplaces

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For a longer trouble-free working lifewith full traceability, nothing matchesGiacomini lever ball valves.

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HIU Brochure - G3 G4 Eco - June 11

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