Beretta SCV-25 User manual

Installation Manual
Solar | Solar collector
SCV-25
Installation Manual
EN

This manual, Code 20026429 - Rev. 10 (10/18) comprises 16 pages.
2
CONFORMITY
Solar collectors conform to EN 12975 standard and to Solar Keymark certication standard.
Range
MODEL CODE
SCV-25 20026324
RANGE
Contents
CONTENTS
The following symbols are used in this manual:
b
CAUTION! = Identies actions that require caution
and adequate preparation.
a
STOP! = Identies actions that you MUST NOT do.
Thismanual,Code
-Rev.
comprises
pages.
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 3
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Identication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical specications. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Water circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Unpacking the product . . . . . . . . . . . . . . . . . . . . . . . . . 10
Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filling the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
COMMISSIONING AND MAINTENANCE . . . . . . . . . 14
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3
GENERAL INFORMATION
System layout
SYSTEM LAYOUT
Collector
probe socket
P1
H3
Collector
return Collector outlet
P2
H2
L1
L2
H1
L3
Seal
Insulation
Bottom pipe
Glass
Vacuum
Absorbent
coating
Collector
foot
Support frame
Direction of flow
Evacuated
tube
Aluminium absorber
Top
cover plat
Top pipe
Reflective
mirror
Description H1 H2 H3 L1 L2 L3 P1 P2 U/M
SCV-25
1730 65 1700 1600 1552 110X14 68 145 mm
Generalinformation

GENERAL INFORMATION
4
Identication
Matricola
Modello
Codice
CODICE : 20025360
FABBRICATO IN ITALIA
DESCRIZIONE : CTE25V
S/N :
COLLETTORE SOLARE SOTTOVUOTO
DIMENSIONI: 1600X1730X145 mm
SUPERFICIE LORDA: 2,77 m
2
TEMPERATURA DI STAGNAZIONE: 268°C
SUPERFICIE DI APERTURA: 2,40 m
2
CONTENUTO LIQUIDO: 2,05 l
SUPERFICIE ASSORBITORE : 2,69 m
2
PESO A VUOTO: 52 kg
LIQUIDO TERMOVETTORE:
GLICOLE PREMIX (Acqua + Glicole, max concentrazione 50%)
FLUIDO NON GLICOLICO (Acqua + Inibitori di corrosione
atossici + Potassio Formiato, max concentrazione 50%)
MAX PRESSIONE ESERCIZIO: 10 bar
da Riello S.p.A.
CEN 025
20022981_E4
EN 12975
10000001 BAR CODE 128B
Anno di produzione
SERIALE PROGRESSIVO
FABBRICATO IN ITALIA
DESCRIZIONE : CP25TVA
S/N :
COLLETTORE SOLARE PIANO
DIMENSIONI: 2046X1187X90 mm
SUPERFICIE LORDA: 2,43 m
2
TEMPERATURA DI STAGNAZIONE: 201 °C
SUPERFICIE DI APERTURA: 2,20 m
2
CONTENUTO LIQUIDO: 1,6 l
SUPERFICIE ASSORBITORE: 2,15 m
2
PESO A VUOTO: 36,5 kg LIQUIDO TERMOVETTORE:
ACQUA+GLICOLE PROPILENICO
MAX CONCENTRAZIONE GLICOLE: 50%
MAX PRESSIONE ESERCIZIO: 10 bar
da Riello S.p.A.
20038498_E1
EN 12975
Certif. 011-7S1766 F
12000025 BAR CODE 128B
Anno di produzione
CODICE : 20038250
Data plate
Serial number plate
Code
Year of production
Serial Number
Description
by Riello S.p.A.
Made in Italy
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
b
If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installation
and servicing may be rendered difcult.
IDENTIFICATION

GENERAL INFORMATION
5
Technical specications
DESCRIPTION SCV-25
Total area 2,77 m2
Exposed area 2,40 m2
Effective absorption area 2,69 m2
Water connections threaded on Ø 18 pipes mm
Empty weight 52 kg
Liquid content 2,05 l
Recommended ow rate per m2of panel 30 l/(h x m2)
Absorption (α)> 94 %
Emissions (ε)< 7 %
Maximum permitted pressure 10 bar
Stagnation temperature 268 °C
Maximum number of collectors connectable in series 6 n°
Efciency parameters
Description Absorber surface
area Open surface area U/M
Optical efciency (ηο) (*) 0,627 0,70 -
Thermal dispersion factor (a1) (*) 1,027 1,15 W/(m2K)
Thermal dispersion temperature dependence factor
(a2) (*) 0,010 0,011 W/(m2K2)
Description U/M
IAM T (50°) (*) 1,07 -
IAM L (50°) (*) 0,954 -
Efciency (ηcol) (**) 64 %
(*) Tested according to EN 12975, referred to a 33.3%
water-glycol mix, ow rate of 170 l/h and irradiation G
= 800W/m2.
Tm = (Coll._inlet _temp.+Coll._outlet_temp.)/2
T*m = (Tm-T_ambient)/G
(**) Calculated with a temperature difference of 40K be-
tween the solar collector and the surrounding air, and
with total solar radiation of 1000 W/m2referred to the
exposed area.
Efciency curve referred to exposed area
1,0
0,8
0,6
0,4
0,2
00 0,02 0,04 0,06 0,08
0,10
Tm* [m
2
KW
-1
]
b
Minimum recommended slope is 15° (to ensure efcient self-cleaning and minimise snow pressure).
Installations in locations liable to frequent snow and hail, and installations on at roofs in locations subject to strong
winds are not recommended (see "Static load" on page 11).
TECHNICAL SPECIFICATIONS

GENERAL INFORMATION
6
COLLECTOR WIND AND SNOW LOADING CHART
(Calculated for standard, zone 1 wind loads and snow loads)
Installa-
tion height
above
ground (m)
Site’s wind
exposure
Mass in kg to secure
collector against lifting by
wind Altitude
(m.a.s.l.)
Total load on roof from
wind and snow loads and
collector weight (kg)
At angle of
45 °
At angle of
20 °
At angle of
45 °
At angle of
20 °
SCV-25
0-10 low 60 40 100 424 546
10-20 low 80 50 250 595 773
0-10 medium 80 70 100 396 510
10-20 medium 90 80 250 533 691
b
These specications are purely indicative. The entire structure must be inspected by an expert in static loading in
compliance with applicable standards.

GENERAL INFORMATION
7
Connections
The diagram below illustrates the connections between solar collectors in lines.
The ttings are available as accessories to be ordered separately.
collector
temperature sensor
to heat
exchange circuit
from heat
exchange circuit
union
olive
olive
ring nut
ring nut
union
olive
olive
ring nut
union
olive
olive
ring nut
stub pipe
stub pipe stub pipe
Collectors in the same line must be connected so that the heat transfer uid ows through them in series.
Lines of solar collectors can be connected either in series (provided each line contains no more than 6 collectors) or in
parallel. The complete circuit must always be hydraulically balanced. See the following sample layouts.
Two lines in series Two lines in parallel
T T
CONNECTIONS

GENERAL INFORMATION
8
Water circuit
3
11
°C
M
4
4
4
9
8
11
10
13
14
2
6
12
Valve group
SOLAR
CONTROLLER
17
7
5
15
16
18
19
R M
1 Solar collector
2 Storage cylinder
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 cylinder bottom temperature sensor
18 Storage cylinder top temperature sensor
19 Heat transfer uid recovery
M Collector outlet
R Collector return
b
Connect no more than 6 collectors in series.
b
We recommend the use of stainless steel pipes spe-
cially 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).
WATER CIRCUIT

GENERAL INFORMATION
9
Pressure drop in solar collectors
PRESSURE DROP (mbar)
700
800
900
600
500
400
300
200
100
0
0 500 1000 1500 2000 2500 3000
FLOW RATE (l/h)
Diameter of connection pipes for a specic ow rate of 30 lt/m2h
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"

10
INSTALLATION
Unpacking the product
UNPACKING THE PRODUCT
The solar collectors are packed in various ways depending
on the number of units supplied:
A In a pack of 1
B
Packages of 5 collectors
Pallet contents:
- collector
- documentation envelope containing certicate of
warranty and label with bar code.
b
Keep the front of the packaging and use it to shade
the glass tubes before the system is started up.
If the solar collectors are not going to be put into oper-
ation immediately, and there is any risk of their being
exposed to rain, do not use the packaging to shade
them as it is not water-proof.
b
The instruction manual is an integral part of the so-
lar connector. Once located, read it thoroughly and
keep it safe.
A
B
Handling
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 equipment and
use suitable safety devices.
a
Do not dispose of packaging material into the envi-
ronment, or leave it within the reach of children, since
it can become a potential hazard. Dispose of packag-
ing material in compliance with applicable legislation.
a
Do not lift the solar collector by its water ttings.
A
A
A
A
HANDLING
Installation

INSTALLATION
11
Installation
INSTALLATION
GENERAL INSTRUCTIONS
Assembly
The system must be installed by specialist personnel. Use
only the assembly material supplied with the solar collec-
tor. The supporting framework and all masonry or brick-
work xing 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 veried on site by a person ex-
pert 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 x
the solar collector in place. An expert in static loading must
verify that the entire frame complies with relevant stand-
ards, 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. Allow for a
maximum permissible total load on each collector of 850 Pa
(possible in the event of a peak wind speed of 130 km/h).
Lightning protection
The metal piping of the solar heating circuit must be con-
nected to the main potential compensation bar by a (yel-
low-green) copper wire (H07 V-U or R) of at least 16 mm2. If
a lightning conductor system is already installed, the solar
collectors may be connected to the existing system. Alter-
natively, 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
Solar collectors must be connected in series using the
threaded unions provided. If exible pipes are not used to
connect the solar collectors, the piping must be tted with
expansion joints (U-type expansion joints, exible hoses) to
absorb thermal expansion. Provided adequate expansion
joints are used, up to 6 solar collectors may be connected
in series. Make sure that the unions are located correctly
when tightening them. When tightening a union with a pipe
wrench or spanner, always hold the opposite union steady
with a second tool to avoid twisting the pipe to which the
union is attached.
b
All pipes in the water circuit must be insulated in con-
formity to relevant standards. Lagging and insulation
must be protected 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 ttings, connections, bleed and vent valves
against dirt and dust etc.. In installations which serve pri-
marily to produce domestic hot water in the summer, install
the collectors facing from east to west at an angle of be-
tween 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 lling
For safety reasons, the solar collector must be covered, us-
ing the packaging it came in, for at least two hours before
it can be lled. In areas liable to frost, ll the collector with
an anti-freeze heat transfer uid.
b
DO NOT ADD WATER TO THE GLYCOL PREMIX.
The anti-freeze supplied for use with solar collectors
comes ready to use. IT MUST NOT BE MIXED WITH
WATER.
b
Take care if you ush the system out, because wa-
ter trapped inside the circuit before lling with glycol
premix may freeze.
Vent
Bleed the circuit:
- On startup (after initial lling) (see the gure on page
12).
- Whenever necessary, as in the event of system mal-
functioning.
Make quite sure that all air has been bled out of the system.
b
Risk of burns from hot uid inside the collectors.
b
Only open the vent valve if the temperature of the uid
in the circuit is below 60°C. Make sure that the collec-
tors 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 densimeter
to check the anti-freeze effect: if the uid’s density
differs from that declared in the manufacturer’s tech-
nical specications, replace the anti-freeze uid.
- Check the pH of the anti-freeze uid using litmus pa-
per: if measured pH differs from that specied in the
manufacturer’s technical specications, replace the
anti-freeze uid.
b
At the end of its useful life, dispose of the product in
compliance with applicable legislation.

INSTALLATION
12
Filling the circuit
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, ush out the system to remove any brazing residues.
Seal test the system after you have ushed it out.
b
Fill the solar collector with anti-freeze heat transfer liquid immediately after ushing it out, because ushing water
may remain trapped in the circuit (with a consequent risk of freezing).
b
The anti-freeze uid supplied as an accessory has been specially formulated for use in solar applications, and
maintains its characteristics over its entire working life. The mix is also non-toxic, biodegradable and biocompatible.
b
Do NOT part ll the circuit with anti-freeze then top up with water.
b
Temperatures in excess of the specied working temperature can cause the anti freeze to break down. This is easily
visible because the liquid becomes darker.
FILLING THE CIRCUIT
2 - FILLING
1 Open the non-return valve (A)
2 Open the air vent at the highest point in the system (see
gure alongside) and keep it open throughout the lling
operation
3 Open the vent valve (7)
4 Pump the heat transfer uid around the circuit with an
external lling pump until all air bubbles have been
eliminated. Close the manual bleed valve
5 Temporarily raise the pressure in the system to 4 bar
6 Start up the system for about 20 minutes
7 Bleed the circuit again from step 2 until all the air has
been removed
8 Set the circuit pressure at the boiler according to the
table below in order to ensure a minimum pressure of
1.5 bar at the height of the collector eld.
9 Close the non-return valve (A) and any open vent valves
to prevent the heat transfer uid from evaporating. °C
M
A
RM
7
Manual bleed
valve (accessory)
Anti-freeze mix
Heat e
xchanger
of solar storage
cylinder
Solar collectors
Heat
transfer fluid
filling pump
Water control system
H
HPressure at boiler
up to 15 m 3 bar
15 - 20 m 3,5 bar
20 - 25 m 4 bar
25 - 30 m 4,5 bar
General rule: p [bar] = 1.5 + H [m] / 10

INSTALLATION
13
b
Do not ll the system in bright, sunny conditions or if
the collectors are hot. Cover the solar collector with
the packaging it came in for at least two hours before
lling it.
b
Make sure that you have bled all the air out of the sys-
tem, using the water control system vent too.
Heat transfer uid lling pump (accessory). A manual
bleed valve is not required if this pump is used.
Checks
On completion of the installation, perform the checks listed in the table below.
CHECKS
Collector circuit
Cold circuit pressure:____bar (see table
above)
Collector circuit seal test
Safety valve check
Anti-freeze checked to - ___ °C
pH of heat transfer uid = ____
Collector circuit bled
Flow rate of 30 l/h per m2 checked
Non-return valve functioning
Solar collectors
Visual check of collectors
Collectors cleaned if necessary
Visual check of collector xing points
Visual check of roof impermeability
Visual check of insulation/lagging

14
COMMISSIONING AND MAINTENANCE
Maintenance
The collector must be cleaned and all parts (reector, glass tubes, etc.) inspected every six months.
REPLACING EVACUATED TUBES
The evacuated tubes are fully functional when delivered.
Nevertheless, if problems occur, they can be replaced
quickly and easily.
Defective tubes are easy to recognise because their under-
sides turn white and their surfaces become extremely hot.
Proceed as follows to remove an evacuated tube. Wear
gloves and take all the necessary precautions:
- Smear the top of the tube (1) near the seal ring with
a lubricant paste
- Unscrew and remove the plug (2) from the foot of the
tube
- Pull the tube (3) downwards, twisting it gently to re-
lease it from the top seal
- Remove the tube from the bottom of the collector.
If you do not have sufcient room to remove the tube down-
wards, proceed as follows:
- Remove the tube from the collector foot as instructed
above
- Pull the tube down about 20 cm
- Hold the tube in a glove, lift it gently and swivel it to
the left or right. This bends the copper pipes inside
the glass tube. Take care not to damage them, how-
ever
- Pull the tube out diagonally across the collector to
remove it.
Reverse the above steps to t the new tube.
b
Remove any pieces of broken glass without damag-
ing the surface of the mirror. Also remove any res-
idues that might have formed around the copper
pipes.
b
Make sure that the silicon seal ring is still correctly
seated.silicone.
1
3
2
A
MAINTENANCE
Commissioningandmaintenance

COMMISSIONING AND MAINTENANCE
15
REPLACING THE CPC REFLECTOR
Our CPC reectors are manufactured and delivered under
the best possible conditions.
Nevertheless, if a fault (e.g. a large dent) is found, they can
be replaced quickly and easily.
Proceed as follows, taking all the necessary precautions, to
remove a damaged reector:
- Unscrew and remove the plug (1) from the foot of the
collector
- Remove the bracket (2) into which the plug was
screwed by bending back the clips (3)
- Remove the reector (4) without moving its glass
tube.
14
2
3
4

20026429 - Rev. 10 (10/18)
Via Risorgimento, 23 A
23900 - Lecco (LC)
www.berettaboilers.com
The manufacturer strives to continuously improve all products. Appearance, dimensions, technical
specications, standard equipment and accessories are therefore liable to modication without notice.