Beretta SC-F25/1 Installation Instructions Manual

SOLAR

COLLECTORS

SC-F25/1

SOLAR

INSTALLATION INSTRUCTIONS

INSTALLATION INSTRUCTIONS

2

MODEL CODE

SC-F25/1 20014637

Kit of 2 collectors SC-F25/1 20014640

Kit of 5 collectors SC-F25/1 20014641

Solar collectors conform to EN 12975 standard

and to Solar Keymark certification standard.

RANGE

The following symbols are used in this manual:

b CAUTION! = Indicates actions that require caution and adequate preparation

a STOP! = Identifies actions that your MUST NOT do

3

Dear Customer,

We thank you for playing your part in saving the environment and for choosing a top quality solar
collector. You have purchased a modern product that is easy to install and use, and is designed
to give you dependable and safe energy savings for many years to come. You can keep your

new solar collector in peak condition by having it serviced regularly by an authorised

Beretta
Technical Assistance Centre.
This instruction manual contains important instructions and precautions that must be observed to
ensure the trouble-free installation and efficient functioning of your solar collector.

Please accept our thanks and our congratulations on your choice of product.

Beretta

INSTALLATION INSTRUCTIONS

4

1 GENERAL SAFETY INFORMATION AND PRECAUTIONS ......................... 5

2 DESCRIPTION OF THE SOLAR COLLECTOR ............................................ 6

2.1 Description ............................................................................................................................................ 6

2.2 Identification .......................................................................................................................................... 6

2.3 Design ................................................................................................................................................... 7

2.4 Technical specifications ........................................................................................................................ 8

2.5 Accessories ........................................................................................................................................... 8

2.6 Collectors connection ........................................................................................................................... 9

2.7 Water circuit .......................................................................................................................................... 10

2.8 Location of probes ................................................................................................................................ 11

3 FOR THE INSTALLER.................................................................................... 12

3.1 Unpacking the collector ........................................................................................................................ 12

3.2 Dimensions and weight ......................................................................................................................... 13

3.3 Handling the collector ........................................................................................................................... 13

3.4 Installation ............................................................................................................................................. 14

3.5 Filling the circuit .................................................................................................................................... 15

3.6 Checks .................................................................................................................................................. 16

CONTENTS

This manual, Code 20013697 - Rev. 8 (12/12) is made up of 20 pages.

5

1 GENERAL SAFETY INFORMATION
AND PRECAUTIONS

b

As soon as you open the packaging,
check immediately that the contents are
all present and undamaged. Contact the
reseller from whom you purchased the
solar collector if you notice any prob­lems.

b

This solar collector must be used only
for the proper purpose for which it is
designed and made. The manufacturer
declines all responsibility, contractual or
other, for damage to property or injury to
persons or animals caused by improper
installation, adjustment, maintenance or
use.

b

The solar collector must be serviced
every two years.

b

Work near uncovered and live electrical
wires, with which it is possible to come
into contact, is only permitted under the
following conditions:

- Wires must be free from voltage for the
entire duration of the work.

- Parts remaining live must be covered
or accidental contact prevented.

- The following minimum safety distanc­es must be respected:
1 m for voltages of up to 1000

Volts

3 m for voltages from 1000 to

11000 Volts

4 m for voltages from 11000 to

22000 Volts

5 m for voltages from 22000 to

38000 Volts

over 5 m if the voltage is not known.

Contact with open, live electrical wires

may lead to electrocution and may even
be fatal.

b

Always wear safety goggles when drill­ing. Always wear safety shoes, cut-proof
protective gloves and a safety helmet
when performing installation work.

b

Before beginning installation work on
roofs, install the necessary fall prevention
and fall arrest devices and ensure that all
applicable safety standards are applied.

Use only tools and materials that conform

to the safety standards that are applica­ble in the place of work.

b

Only wear overalls that have a safety har­ness (with a suitable safety or fall-arrest
belt, ropes or slings, fall dampers or dis­sipaters). In the absence of adequate fall
prevention and security devices, failure
to use a proper safety harness may lead
to falls from great heights with serious or
even fatal consequences.

b

The use of ladders leaned against walls
can lead to serious falls if the ladder
slips, slides of falls. When using ladders,
always ensure that they are stable, and
that suitable ladder stops are present. If
possible secure the ladder with hooks.
Make sure that there are no live electrical
wires near the ladder.

b

Especially when installing the solar col­lector as part of a domestic hot water
system, follow the orientation and angle
of the roof to ensure that the collector
blends in with the architecture of the
building.

b

This instruction manual is an integral
part of the solar collector. It must be kept
safe and must ALWAYS accompany the
solar collector, even if it is sold to another
owner or transferred to another user or
to another installation. If you damage or
lose this manual, order a replacement
immediately from your local Technical
Assistance Centre.

INSTALLATION INSTRUCTIONS

6

These panel type solar collectors have two
water fittings and consist of an aluminium
structure with a single-piece copper absor­ber plate. This has a highly selective finish
obtained by a special vacuum treatment
called “TiNOX”, which guarantees excellent
collector performance. The absorber plate
is ultrasonically welded to 12 copper pipes
through which the heat transfer fluid flows.
The two main pipe connection manifolds are
also in copper. The top manifold has a central
choke to allow the first 6 pipes to be fed in
parallel. After the heat transfer fluid reaches
the bottom manifold, it rises through the

second group of 6 pipes to the top manifold
again. This effectively doubles the thermal
length of the collector.
Each panel is protected by solar, tempered
glass with low iron oxide content and a high
energy transmission factor. The bottom of the
tray are lined with 4 cm of rock wool insula­tion. The temperature probe is installed in a
special copper socket.
These solar collectors are easy to install.
Provided they are properly installed, they
provide reliable, long lasting and extremely
efficient service.

2

DESCRIPTION OF THE SOLAR COLLECTOR

2.1
DESCRIPTION

2.2
identification

The solar collectors are identified by two plates:

b If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper instal-

lation and servicing may be rendered difficult.

- Data plate
This lists the technical specifications and performance of the product.

- Serial number plate
This bears the collector’s code number, model and serial number.

Serial number

Model

Code

066316

DIMENSIONI : 2046X1186X90 mm

TEMP. MASSIMA : 204 °C

20008081

FABBRICATO IN ITALIA da Riello S.p.A.

09xxxxxx

Code

Year of production

Serial Number

Description

Made in Italy
by Riello S.p.A.

Flat plate

solar collector

Dimensions

Gross area

Aperture area

Absorber area

Empty weight

Maximum operating pressure
Stagnation temperature
Liquid content
Max glycol concentration
Heat transfer fluid:
water+propylene glycol

Up to max 6 collectors can be connected

7

2.3
Design

Collector

probe socket

Collector

outlet

Collector
return

Direction of
flow of heat

transfer liquid

Connector Ø 22 mm.

Glass 3,2 mm

Connection ring nut, 1"

INSTALLATION INSTRUCTIONS

8

The following accessories are available, to be ordered separately.

ACCESSORY CODE

Fittings kit 20014661

Flexible hose connections kit 20001452

Manual bleed valve 1150629

Glycol anti-freeze (5 kg) 1150549

Glycol anti-freeze (10 kg) 1150559

2.4
Technical specifications

2.5
Accessories

DESCRIPTION

Total area 2,43 m

2

Exposed area 2,20 m

2

Effective absorption area 2,15 m

2

Connections (M) - (F) 1" Ø

Empty weight 40 kg

Liquid content 1,6 l

Recommended flow rate per m

2

of panel 30 l/h

Glass thickness 3,2 mm

Absorption (α) ~ 95 %

Emissions (ε) ~ 5 %

Maximum permitted pressure 10 bar

Maximum temperature 204 °C

Maximum number of collectors connectable in series 6 n°

1

0,8

0,6

0,4

0,2

0

00,020,040,060,080,1 0,12

Tm[m2K/W]

*

Efficiency curve

Tested according to EN 12975, referred to
a 33.3% water-glycol mix, flow rate of 75 l/h
and irradiation G = 800W/m

2

.

Tm = (Coll._inlet _temp.+Coll._outlet_temp.)/2

T*m = (Tm - ambient_temp)/G

Optical effi-

ciency of
absorber

(ηο)

0,798 4,27 0,003

Thermal dispersion factor

of absorber

a1

W/(m2K)

a2

W/(m2K2)

WIND AND SNOW LOADS ON COLLECTORS

Diameter of connection pipes for a specific flow rate of 30 lt/m

2

h

Total surface area (m2) 2 - 4 6 - 12 14 - 20
Diameter of copper pipe (mm) 10 - 12 14 18
Diameter of steel pipe (inch) 3/8 - 1/2 1/2 3/4

Installation height

above ground

Wind speed

Mass in kg to secure collector against

lifting by wind

Load on roof from wind, snow, and

collector weight

At angle of 45° At angle of 20 At angle of 45° At angle of 20°

0 - 8 m 100 km/h 80 kg 40 kg 320 kg 345 kg

8 - 20 m 130 km/h 180 kg 90 kg 470 kg 430 kg

20 - 100 m 150 km/h 280 kg 150 kg 624 kg 525 kg

9

2.6
Collectors connection

The diagram below illustrates the connections between solar collectors in lines.

The collectors in a line are connected so that the heat transfer fluid goes through them in series.
The connection with the heat transfer circuit that goes toward the heat exchanger must be the one near the sensor
pocket of the last collector of the line (see the picture above).
It is also possible to connect more then one line of solar collectors both in series (max 6 collectors in series) or in
parallel.
Anyway the circuit must be hydraulically balanced (see the following schemes as an example).

TT

Two lines in series Two lines in parallel

from the

heat transfer circuit

half union

ring nut

seal ring

seal ring

male union

sensor pocket

seal ring

toward the
heat transfer
circuit

INSTALLATION INSTRUCTIONS

10

2.7
Water circuit

The diagram below illustrates the water connections between solar collectors and a storage heater.

3

11

RM

°C

M

4

4

4

9

8

11

17

10

13

14

2

6

12

5

7

15

16

Water control system

1 - Solar collector
2 - Storage heater
3 - Collector probe
4 - Disconnect valves
5 - Non-return valve
6 - Temperature gauge
7 - Vent valve
8 - Safety valve
9 - Pressure gauge
10 - Drain
11 - Expansion vessel
12 - Pump
13 - Flow regulator
14 - Flow meter
15 - Vent cock
16 - Manual bleed valve (accessory)
17 - Heat transfer fluid recovery

M - Collector outlet
R - Collector return

b Connect no more than 6 collectors in

series.

b

If copper pipes are used, joints must be
hot brazed.

b We recommend the use of stainless

steel pipes specially made for solar col­lectors for the outlet, return and probe

pipes. The probe cable should be of the
shielded type.

b Do not use plastic or multistrate pipes.

Operating temperature can exceed
180°C.

b Pipe lagging must be able to resist high

temperatures (180°C).

140

160

120

100

80

60

40

20

0

0 100 200 300 400 500 600 700 800 900 1000

Pressure drop (mbar)

Flow rate (l/h)

Pressure drop in solar collectors (*)

(*) With antifreeze-water mix of 33,3% / 67,7% and heat transfer medium temperature = 20°C.

11

The temperature sensor must be installed in the nearest socket to the collector outlet. Make sure that the sensor
makes good contact with the socket. Materials (sensor, cables, seals and insulation) used to install the temperature
sensor must be able to withstand high temperatures (up to 250°C).

2.8
Location of probes

3

11

RM

°C

M

4

4

4

9

8

11

10

13

14

2

6

12

Water control system

SOLAR

REGULATOR

17

7

5

15

16

18

19

1 - Solar collector
2 - Storage heater
3 - Collector probe
4 - Disconnect valves
5 - Non-return valve
6 - Temperature gauge
7 - Vent valve
8 - Safety valve
9 - Pressure gauge
10 - Drain
11 - Expansion vessel

12 - Pump
13 - Flow regulator
14 - Flow meter
15 - Vent cock
16 - Manual bleed valve (accessory)
17 - Storage heater bottom probe
18 - Storage heater top probe
19 - Heat transfer fluid recovery

M - Collector outlet
R - Collector return

INSTALLATION INSTRUCTIONS

12

1

1

The solar collectors are packed in various
ways depending on the number of units
supplied:

A - Individually packaged collectors or
packages of 2 collectors

Pallet contents:

- collector/s

- Documentation envelope containing:

- certificate of warranty and label with
bar code.

B - Packages of 5 collectors
Pallet contents:

- 5 collectors

- Documentation envelope containing:

- certificate of warranty and label with
bar code.

b Take care not to lose the flat seal (1)

strapped to the fittings of the solar con­nector.

b The instruction manual is an integral part

of the solar connector. Once located,
read it thoroughly and keep it safe.

Case A

Case B

3 FOR THE INSTALLER

3.1
Unpacking the collector

13

1221

1186

2046

68

90

Once you have removed the outer packag­ing, proceed as follows to unpack and handle
the solar collector:

- Remove the PVC wrapping to free the solar
collector from the pallet.

- Tilt the solar collector slightly and grip it at
the four points shown (A) to lift it.

- Use a hoist or other suitable lifting equip­ment to hoist the solar collector on to the
roof.

b Wear suitable personal protective equip-

ment and use suitable safety devices.

a Do not dispose of the packaging mate-

rial into the environment where it can
become a potential hazard. Dispose of
the packaging material in compliance
with applicable legislation.

a Do not lift the collector by means of its

outlet or return pipes.

A

A

A

A

Net weight 40 kg

3.2
Dimensions and weight

3.3
Handling the collector

INSTALLATION INSTRUCTIONS

14

Assembly

The solar collector must be fitted by specialist
personnel. Use only the assembly material sup

­plied with the solar collector. The supporting
framework and all masonry or brickwork fixing
points must be checked by a person expert in
static loading, and must be suitable for the nature
of the installation site.

Static load

The solar collector must only be installed on
roofs or frames that are strong enough to sup­port its weight. The strength of the roof or frame
must be verified on site by a person expert
in static loading before the solar collector is
installed. During this process, it is important
to verify the suitability of the supporting frame
to hold the screw fasteners that fix the solar
collector in place. An expert in static loading
must verify that the entire frame complies with
relevant standards, especially in areas liable
to snow and areas exposed to high winds.
Conditions (gusts of wind, formation of wind
vortices, etc.) at the point where the solar col­lector is to be installed must be carefully con­sidered since these can increase the loads on
the supporting structure.

Lightning protection

The metal piping of the solar heating circuit must
be connected to the main potential compensation
bar by a (yellow-green) copper wire (H07 V-U
or R) of at least 16 mm

2

. If a lightning conduc­tor system is already installed, the solar collec­tors may be connected to the existing system.
Alternatively, the solar collector piping may be
connected to ground via a ground wire sunk into
the earth. Ground wires must be sunk outside the
house. The ground wire must be connected to the
potential compensation bar through a wire of the
same diameter.

Water connections

The solar collectors must be connected in
series using the fittings and seal rings provid­ed. If flexible hoses are not used to connect
up the ends of solar collector lines, devices
must be incorporated in the rigid pipes to
permit thermal expansion (U-type expansion
joints, sections of flexible hose or dedicated
expansion joints). Provided adequate expan­sion joints are used, up to 6 solar collectors
may be connected in series. Make sure that
the seal rings are correctly positioned in their
seats. When tightening a fitting with a pipe
wrench or spanner, always hold the opposite
fitting steady with a second tool to avoid dam­aging the absorber.

b

All pipes in the water circuit must be insu­lated in conformity to relevant standards.

Lagging and insulation must be protect-

ed against damage by the weather and
birds and animals.

Angle of collectors / General

Solar collectors are designed to be installed
at angles of between 15° (minimum) and 75°
(maximum).
Make sure that the bleed and vent valves of
the collectors remain open while the collectors
are being installed.
Take care to protect all fittings, connections,
bleed and vent valves against dirt and dust
etc.
In installations which serve primarily to produce
domestic hot water in the summer, install the collec

­tors facing from east to west at an angle of between
20 and 60°. The ideal orientation is southwards, at an
angle equal to the latitude of the location minus 10°.
If the system sustains the greatest thermal
load in the winter (as in systems that combine
domestic hot water production with central
heating), install the collectors facing south (or
south-east or south-west) at an angle greater
than 35°. The ideal orientation is southwards,
at an angle equal to the latitude of the location
plus 10°.

Flushing and filling

For safety reasons, only fill the system when
the sun is not shining. In areas liable to frost,
fill the circuit with a 40% glycol solution for
solar panels.

b The anti-freeze solution must be mixed

with water prior to filling the system.

b Take care if you flush the system out,

because any trapped water may freeze
if the circuit is not filled immediately with
anti-freeze.

Bleeding

Bleed the circuit:

- On start-up (after initial filling).

- Whenever necessary, as in the event of sys-

tem malfunctioning.
Make quite sure that all air has been bled out
of the system.

b Risk of burns from hot fluid inside the

collectors!

b Only open the vent valve if the temper-

ature of the fluid in the circuit is below
60°C.

3.4
Installation

15

Perform the following steps before starting up the system.

1 - FLUSHING AND SEAL TESTING THE SYSTEM

If copper piping has been used and joints have been hot brazed, flush out the system to remove
any brazing residues. Seal test the system after you have flushed it out.

b Fill the solar collector with glycol/water mix immediately after flushing it out, because flush-

ing water may remain trapped in the circuit (with a consequent risk of freezing).

2 - PREMIXING WATER + GLYCOL

Glycol anti-freeze is supplied separately in standard volumes and must be premixed with water
in a suitable container before being used to fill the system. For example, a mix of 40% glycol
and 60% water provides anti-freeze protection down to a temperature of -21°C.

b The propylene glycol supplied is specially formulated for solar collector applications and

remains fully efficient throughout the -32 to +180°C temperature range.

It is also non-toxic, biodegradable and biocompatible.

b Do NOT part fill the circuit with pure glycol then add water later.

3.5
Filling the circuit

Make sure that the collectors are not

hot before you start bleeding the circuit.
Always cover the solar collectors before
bleeding the circuit. Always perform
bleeding in the morning.

Checking the heat transfer liquid

Check the anti-freeze effect and the pH level
of the heat transfer liquid every 2 years.

-

Use an instrument like a refractometer or den-

Anti-freeze Temperature Density

50%

-32°C 1,045 kg/dm

3

40%

-21°C 1,037 kg/dm

3

30%

-13°C 1,029 kg/dm

3

simeter to check the anti-freeze effect (which
must have a nominal protection value of approx.

-30°C). If the protection threshold is higher than

-26°C, replace the mix, or add anti-freeze as
required.

- Use litmus paper to check the pH (nominal
value approx. 7.5). If the measured value is
below 7, change the mix.

INSTALLATION INSTRUCTIONS

16

3 - FILLING

1 - Open the non-return valve (A).
2 - Open the air vent at the highest point in the

system (see figure alongside) and keep it

open throughout the filling operation.
3 - Open the vent valve (7).
4 - Pump the heat transfer fluid around the

circuit with an external filling pump until all

air bubbles have been eliminated. Close

the manual bleed valve.
5 - Temporarily raise the pressure in the sys-

tem to 4 bar.
6 - Start up the system for about 20 minutes.
7 - Bleed the system again from step 2 until all

the air has been removed.
8 - Set the pressure in the system to 3 bar.
9 - Close the non-return valve (A) and any

open vent valves to prevent the heat

transfer fluid from evaporating.

Heat transfer fluid filling pump (accessory).
A manual bleed valve is not required if this
pump is used.

On completion of the installation, perform the checks listed in the table below.

3.6
Checks

b Do not fill the system in bright, sunny conditions or if the col-

lectors are hot.

b Make sure that you have bled all the air out of the system,

using the water control system vent too.

M

A

7

°C

Anti-freeze mix

Water control system

Heat
transfer fluid
filling pump

Solar collector

R

M

Manual

bleed valve

(accessory)

Heat exchanger
of solar

DESCRIPTION OK

Collector circuit

Cold pressure 3 bar

Collector circuit seal test

Safety valve check

Anti-freeze checked to - ___ °C

pH of heat transfer fluid = ____

Collector circuit bled

Flow rate of 30l/h per m

2

checked

Non-return valve functioning

DESCRIPTION OK

Solar collectors

Visual check of collectors

Collectors cleaned if necessary

Visual check of collector fixing points

Visual check of roof impermeability

Visual check of insulation/lagging

17

INSTALLATION INSTRUCTIONS

18

Via Risorgimento, 13 - 23900 Lecco (LC)

Servizio Clienti 199.13.31.31*

Assistenza Tecnica Numero Unico 199.12.12.12*

www.berettaclima.it

The manufacturer strives to continuously improve all products.

Appearance, dimensions, technical specifications, standard equipment

and accessories are therefore liable to modification without notice.

Cod. 20013697 - Rev. 8 (12/12)