Beretta NS-SOL Series User guide

NATURAL
CIRCULATION
SYSTEMS
NS-SOL
INSTALLER, TECHNICAL
ASSISTANCE CENTRE AND
USER MANUAL
SOLAR

2

This manual, Code 20050263 - Rev. 7 (01/14) comprises 16 pages.
3
Dear Customer,
Thank you for choosing a BNatural circulation system. You have purchased a modern, quality product that is de-
signed to give dependable and safe service and to provide comfort in the home for many years to come. Arrange for your
Natural circulation system to be serviced regularly by an authorised BTechnical Assistance Centre. Their personnel
are specially trained to keep your product efficient and cheap to run. Your BTechnical Assistance Centre will also
stock any original spare parts that might be required.
This instruction manual contains important instructions and precautions that must be observed to ensure the trouble-free
installation and efficient functioning of your Bsolar water heating system.
Please accept our renewed thanks for your purchase.
CONFORMITY
The solar collectors used in Bnatural circulation systems conform to EN standard 12975.
Bstorage cylinders conform to DIN 4753-3 and UNI EN 12897 standards.
b This product must only be used for the purpose for which it is designed and made, as specified by B. B
declines all responsibility, contractual or other, for damage to property or injury to persons or animals caused by
improper installation, adjustment, maintenance or use.
RANGE
MODEL CODE
NS-SOL 150/1 20049186
NS-SOL 150/1 DOUBLE 20059107
NS-SOL 200/1 20049198
NS-SOL 200/1 DOUBLE 20059116
NS-SOL 200/2 20049199
NS-SOL 300/2 20049201
ACCESSORIES
INSTALLATION ACCESSORIES AND MOUNTING FRAME KIT
For a complete list of accessories and details of their compatibility, refer to the Catalogue.
CONTENTS
The following symbols are used in this manual:
b
CAUTION! = Identifies actions that require caution
and adequate preparation.
a
STOP! = Identifies actions that you MUST NOT do.
This manual, Code
- Rev.
comprises
pages.
ENGLISH
GENERAL ..................................4
1 General Safety Information .................. 4
2 Precautions .............................. 4
3 Description of the system ................... 5
4 Safety devices............................ 5
5 Identification ............................. 5
6 System layout ............................ 6
7 Technical specifications .................... 7
8 Overall dimensions and weights.............. 7
INSTALLER .................................8
9 Water circuit ............................. 8
10 Unpacking the product ..................... 8
11 Handling ................................ 9
12 Preparing for installation .................... 9
13 Assembly .............................. 10
14 System water connections ................. 10
15 Preparing for initial startup ................. 11
TECHNICAL ASSISTANCE CENTRE ............13
16 Initial startup ............................ 13
17 Maintenance ............................ 13
END USER.................................15
18 Putting into service ....................... 15
19 Maintenance ............................ 15
20 Troubleshooting.......................... 16
21 Disposal ............................... 16

4
GENERAL
1 GENERAL SAFETY INFORMATION
b Check that the product is complete, undamaged
and as ordered as soon as you receive it. Report
any discrepancies or damage to the dealer who
sold it.
b This product must be installed by a legally qualified
heating engineer. On completion of the installation,
the installer must issue the owner with a declara-
tion of conformity confirming that the installation has
been completed to the highest standards in com-
pliance with the instructions provided by Bin
this instruction manual, and that it conforms to all
applicable laws and standards.
b This product must only be used for the purpose
for which it is designed and made, as specified by
B. Bdeclines all responsibility, contractual
or other, for damage to property or injury to persons
or animals caused by improper installation, adjust-
ment, maintenance or use.
b Make sure that the roof is strong enough to support
the weight of the solar water heating system under
operating conditions. Also make sure that the sec-
tion of roof chosen for the installation enjoys a high
level of insolation, and is not shaded during the day
by tall plants, trees, other houses, hills, etc..
b The installation of a solar water heating system
modifies the existing structure of the roof. Verify
the suitability of all roof elements and if necessary
adapt them to avoid leaks or damage by wind and/
or snow loads.
b If the system is installed in an area subject to gust-
ing winds or snow loads in excess of the limits given
in the technical specifications, consult your supplier
for advice.
b Snow can build up in the sheltered area behind
the solar water heating system. Provide adequate
protection to avoid increasing the static load on the
roof.
b The system must be serviced at least once a year.
b The water supply circuit must permit the storage
cylinder to be filled and emptied in safety. Shut-off
valves must therefore be easily accessible to the
user and the operation of emptying the storage cyl-
inder must not create any risk of flooding or other
damage.
b Insulate the domestic water pipes (hot and cold)
and the pipes of the solar collector circuit. Provide
suitable insulation for all outdoor accessories.
b The point through which the water pipes enter the
building must be rain-proof and damp-proof.
b If you notice any water or heat transfer liquid leaks,
disconnect the system immediately from the mains
electricity supply (if a supplementary heating ele-
ment is installed), shut off the water supply, and no-
tify B’s Technical Assistance Service or a quali-
fied heating engineer immediately.
b Make sure that the water-glycol mix in the solar col-
lector circuit is able to resist the minimum tempera-
tures likely to occur in the place of installation.
b The system can reach very high temperatures. Safe-
ty valves can therefore discharge extremely hot liq-
uids. Make sure that the expansion vessel is of a
suitable size and design for use in solar water heat-
ing systems.
b Use proper slings to lift and move the elements of
the system. Never lift the collector or storage cylin-
der by their fittings. Avoid subjecting the collector
to impacts or mechanical strain, and take care to
protect the glass panel. Use the personal protection
equipment required by applicable safety standards.
2 PRECAUTIONS
a Never attempt to install the system without using the
personal protection equipment and without follow-
ing the safety precautions specified by applicable
occupational safety standards.
a Never install solar collectors on roofs without an ad-
equate lightning protection system.
a Never install the system without providing proper
drainage for the two safety valves: that of the do-
mestic hot water circuit and that of the primary (so-
lar collector) circuit.
a If the storage cylinder is equipped with a supple-
mentary heating element, never attempt any clean-
ing or maintenance without first disconnecting it
from the mains power supply.
a Do not allow children or infirm persons to operate
the system unsupervised.
a Do not tamper with or adjust the safety or control
devices without prior authorisation and instructions
from the manufacturer.
a Never use anti-freeze other than that supplied by
Bto fill or top up the solar collector circuit. Mix-
ing different products can reduce the anti-freeze
protection provided.
a Never drain the solar collector circuit under sunny
conditions or when the collector is hot.
a Do not dispose of packaging material into the en-
vironment, or leave it within the reach of children,
since it can become a potential hazard. Dispose of
packaging material in compliance with applicable
legislation.
General

5
GENERAL
3 DESCRIPTION OF THE SYSTEM
The NS-SOL system is a solar hot water heating system
that functions on the principle of natural circulation. The
heat transfer liquid therefore circulates by normal convec-
tion.
The system comprises one or more solar collectors and
a jacket type storage cylinder, located above the collec-
tor/s.
The system does not require any pumps or adjustments.
Order the mounting frame kit separately to suit the type of
roof involved: flat or sloping.
A supplementary heating element is also available for use
if needed.
The system comprises:
- Solar collector/s
- A jacket type solar storage cylinder
- A box of water fittings
- Anti-freeze liquid
4 SAFETY DEVICES
The system is equipped with the following safety devices:
- A primary circuit safety valve that opens if pressure
in the primary (solar collector) circuit rises above a
2.5 bar threshold.
- A secondary circuit safety valve that opens if pres-
sure in the secondary (DHW) circuit rises above a
10 bar threshold.
b Water may come out of the primary and secondary
circuit safety valves as a result of variations in tem-
perature and pressure during the course of the day.
Ensure that proper drainage is provided. For the
same reason, avoid standing near the safety valves
during the day.
b Safety devices must only be replaced by B's
Technical Assistance Service using original spare
parts.
b Over-temperature protection requires an adequate
supply of cold water from the mains.
5 IDENTIFICATION
B NS-SOL systems are identified by:
FABBRICATO IN ITALIA
DESCRIZIONE : CP20TNA
S/N :
COLLETTORE SOLARE PIANO
DIMENSIONI: 1856X1086X75 mm
SUPERFICIE LORDA: 2,02 m2
TEMPERATURA DI STAGNAZIONE: 196 °C
SUPERFICIE DI APERTURA: 1,81 m2
CONTENUTO LIQUIDO: 1,46 l
SUPERFICIE ASSORBITORE: 1,77 m2
PESO A VUOTO: 28 kg LIQUIDO TERMOVETTORE:
ACQUA+GLICOLE PROPILENICO
MAX CONCENTRAZIONE GLICOLE: 50%
MAX PRESSIONE ESERCIZIO: 10 bar
da Riello S.p.A.
20043633_E1
12000025 BAR CODE 128B
Anno di produzione
CODICE : 20042515
EN 12975
Certif. 099BN/0
CEN 025
SERIALE PROGRESSIVO
FABBRICATO IN ITALIA
DESCRIZIONE : CP25TVA
S/N :
COLLETTORE SOLARE PIANO
DIMENSIONI: 2046X1187X90 mm
SUPERFICIE LORDA: 2,43 m2
TEMPERATURA DI STAGNAZIONE: 201 °C
SUPERFICIE DI APERTURA: 2,20 m2
CONTENUTO LIQUIDO: 1,6 l
SUPERFICIE ASSORBITORE: 2,15 m2
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.
EN 12975
Certif. 011-7S1766 F
12000025 BAR CODE 128B
Anno di produzione
CODICE : 20038250
SERIALE PROGRESSIVO
SISTEMA SOLARE A CIRCOLAZIONE NATURALE
NATURAL CIRCULATION SOLAR WATER HEATING SYSTEM
La protezione da sovratemperatura dipende dalla fornitura di acqua fredda sanitaria
Over-temperature protection requires an adequate supply of cold water
Serial N°
Mod.
bar
Anno
l
Cod.
Tipo/Type
bar
Year
Capacità bollitore
Storage cylinder capacity
Pressione di progetto acqua sanitaria
DHW circuit operating pressure
Pressione max circuito solare
Max solar heating circuit pressure
Beretta Caldaie
Via Risorgimento,
1323900 Lecco (LC)
Storage cylinder data plate
Collector data plate
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 difficult.

6
GENERAL
6 SYSTEM LAYOUT
1
6
4
7
2
9 (*)
12
8
11
3
5
11
8
2
7
10
6
4
30°
1
6
Components
1 Solar collector/s
2 Storage cylinder
3 Mounting frame
Pipes and ttings
4 Collector outlet
5 Collector return
6 Plug
External connections
7 Domestic cold water inlet - 3/4”
8 Domestic hot water outlet - 3/4”
9 Domestic cold water inlet cock
10 Filling/drain cock
Safety devices
11 Primary circuit safety valve (2.5 bar)
12 Non-return valve - Secondary circuit safety valve (10
bar)
(*) (Not supplied. To be provided by installer.)
POSSIBLE CONFIGURATIONS
Installation on a sloping roof Installation on a at roof
(Installation angles of 30°, 35°, 40° or 45° possible
with the specic accessory)
30°
NS-SOL
150/1
NS-SOL
200/1
NS-SOL
200/2
NS-SOL
300/2

7
GENERAL
7 TECHNICAL SPECIFICATIONS
Description
NS-SOL
150/1 200/1 200/2 300/2
Collector surface area 2.02 x 1 2.02 x 1 2.02 x 2 2.02 x 2 m2x n.
of pan.
Exposed area 1,80 x 1 1,80 x 1 1,80 x 2 1,80 x 2 m2x n.
of pan.
Absorption area 1,77 x 1 1,77 x 1 1,77 x 2 1,77 x 2 m2x n.
of pan.
Stagnation temperature 196 °C
Storage cylinder capacity 153 202 202 278 l
Magnesium anode 22 x 300 22 x 300 22 x 300 22 x 400 Ø x mm
Heat transfer liquid capacity 8,5 13,6 15,4 20,3 l
Maximum wind and snow load 1900 1900 1500 1900 Pa
DHW circuit safety valve operating pressure 10 bar
Solar collector circuit safety valve operating pressure 2,5 bar
Expected performance of a NS-SOL solar water heating system
(Figures based on homologation according to EN12976)
100
80
60
40
20
0
50 100 150 200 250 300 350 400
Annual insolation (%)
Daily availability of domestic hot water (l)
200/1
Stockholm
Athens
Davos
Würzburg
100
80
60
40
20
0
80 160 240 320 400 480 560 640
Annual insolation (%)
Daily availability of domestic hot water (l)
300/2
Stockholm
Athens
Davos
Würzburg
8 OVERALL DIMENSIONS AND WEIGHTS
Installation on a at roof
Description
NS-SOL
150/1 200/1 200/2 300/2
Empty weight 116 136 181 192 Kg
Full weight 278 352 399 490 Kg
L 1220 1536 2325 2325 mm
L 30° 2138 mm
H 30° 1639 mm
L 45° 1824 mm
H 45° 2039 mm
Installation on a sloping roof
Description
NS-SOL
150/1 200/1 200/2 300/2
Empty weight 102 122 179 187 Kg
Full weight 264 338 397 485 Kg
L 1220 1536 2293 2293 mm
H 720 mm
1950 ÷ 2060
H
175÷395
L
P
H
30°

8
INSTALLER
9 WATER CIRCUIT
UAC Domestic hot water outlet
EAF Domestic cold water inlet
1 Primary (solar collector) circuit safety valve (2.5 bar)
2 Non-return valve - safety valve of secondary (DHW)
circuit (10 bar)
3 Storage cylinder
4 Collector
5 DHW tank (secondary circuit)
6 Primary circuit
7 Temperature sensor socket
8 Magnesium anode
9 Primary circuit filling/drain cock
10 Insulation
CWI
HWO
heat exchange
heat exchange
1
9
2
3
5
7
8
6
6
4
10
10 UNPACKING THE PRODUCT
Contents of packing:
- Solar collector/s
- Storage cylinder
- Box of accessories containing fittings and a con-
tainer of glycol anti-freeze
A plastic pouch containing: this instruction manual, The
bar code label and the serial number label.
b A mounting frame kit must be ordered separately,
and its type chosen to suit the type of roof (flat or
sloping). This kit contains the necessary mounting
frame and connection piping. (See the Catalogue.)
b This instruction manual is an integral part of the
NS-
SOL
system. Once located, read it thoroughly and
keep it safe.
One system
per pallet
Two
systems
per pallet
b
STORE IN A DRY PLACE AND DO NOT EXPOSE TO DIRECT SUNLIGHT UNTILTHE TIME OF INSTALLATION! The packag-
ing is not designed to protect the product against rain or humidity. It can also degrade if exposed to direct sunlight.
Failure to comply with these precautions could lead to irreparable damage to the product.
Description
NS-SOL
150/1 150/1
DOUBLE 200/1 200/1 DOUBLE 200/2 300/2
WEIGHT
Total weight of supply 110 176 130 216 162 185 kg
COLLECTOR/S package 31 2 x 31 31 2 x 31 2 x 31 2 x 31 kg
STORAGE CYLINDER package 62 2x 62 76 2x 62 76 106 kg
Accessories package 3,5 2 x 3,5 3,5 2x 3,5 7 7 kg
DIMENSIONS
Total supply package 1990 x
1250 x 770
1990 x
1250 x 770
1990 x
1250 x 770
1990 x
1250 x 770
1990 x
1250 x 870
2160 x
1250 x 870 mm
COLLECTOR/S package 1865 x
1200 x 80
2 x (1865 x
1200 x 80)
1865 x
1200 x 80
2 x (1865 x
1200 x 80)
2 x (1865 x
1200 x 80)
2 x (1865 x
1200 x 80) mm
STORAGE CYLINDER package
1250 x 600
x 600
2 x (1250 x
600 x 600)
1600 x 600
x 600
2 x (1600 x
600 x 600)
1600 x 600
x 600
2050 x 600
x 600 mm
Accessories package 360 x 270 x
220
2( 360 x
270 x 220)
360 x 270 x
220
2x(360 x
270 x 220)
360 x 270 x
220
360 x 270 x
220 mm
Installer

9
INSTALLER
11 HANDLING
a Do not lift the solar collector by its water fittings.
a Do not lift the storage cylinder by its water fittings.
b Wear suitable personal protective equipment and
use suitable safety devices.
Hold solar collectors at the points shown (A) to move
them.
Lift and move the storage cylinder in a horizontal position.
Make sure that the slings and lifting gear used are suita-
ble for the weight.
A
A
A
A
12 PREPARING FOR INSTALLATION
Select the best possible orientation for the solar collectors
(ideally facing south). Avoid positions that are shaded by
plants, trees, buildings or hills, etc. during the day.
In the case of sloping roof installations, choose the side
that is most exposed to the sun and install the collector/s
at the roof’s own pitch angle and orientation to ensure that
the collector/s blend in architecturally.
Maintain the minimum distance (A) between the system
and the edge of the roof.
Remove all gravel and detritus from the surface on which
the system is to be installed.
Do not use flat roof or sloping roof mounting frames to
install any other equipment. They are designed only for
use with Bsolar water heating systems.
The installation of a solar water heating system modifies
the existing structure of the roof. Verify the suitability of all
roof elements and if necessary adapt them to avoid leaks
or damage by wind and/or snow loads.
> A
> A
A = 1 m for 150/1 and 200/1 models
A = 1.5 m for 200/2 and 300/2 models

10
INSTALLER
13 ASSEMBLY
Start the installation by assembling the mounting frame.
Follow the instructions given in the mounting frame’s own
manual.
Make sure that you comply with all applicable lightning
protection and building potential compensation legisla-
tion.
On completion of assembly, make sure that the Bso-
lar water heating system is perfectly stable, then remove
the protective film from the storage cylinder. Apply the
data plate (1) and the Blabel to the storage cylinder.
a Never attempt to install the system without using the
personal protection equipment and without follow-
ing the safety precautions specified by applicable
occupational safety standards.
1
14 SYSTEM WATER CONNECTIONS
UAC Domestic hot water outlet (Ø 3/4”)
EAF Domestic cold water inlet (Ø 3/4”)
1 Primary (solar collector) circuit safety valve (2.5 bar)
2 Non-return valve - safety valve of secondary (DHW)
circuit (10 bar)
3 Storage cylinder
4 Collector
5 DHW tank (secondary circuit)
6 Primary circuit
7 Temperature sensor socket
8 Magnesium anode
9 Primary circuit filling/drain cock
10 Cock
CWI
HWO
1
9
10
10
10
12
13 14
15
15
15
15
23
5
7
8
6
6
heat exchange
heat exchange
4
11
Connections to be
made by the installer
11 Insulation
12 DHW circuit expansion vessel
13 Pressure reducer
14 Water softener filter
15 Drain
The water supply circuit must permit the storage cylinder to be filled and emptied in safety. Shut-off valves must therefore
be easily accessible to the user and the operation of emptying the storage cylinder must not create any risk of flooding
or other damage.
b All water pipe connections must conform to appli-
cable standards.
b The operating pressure limits specified on the data
plate must never be exceeded. It may therefore be
necessary to fit a pressure reducer.
b A thermal mixing valve must always be connected
to the hot water outlet to control the temperature of
hot at the taps.
b The point through which the water pipes enter the
building must be rain-proof and damp-proof.

11
INSTALLER
b All shut-off cocks and drain cocks must be easily
accessible. Make sure that the end user fully under-
stands how they function.
Shut-off and drain cocks
15 PREPARING FOR INITIAL STARTUP
Proceed as follows to fill the primary and secondary cir-
cuits.
- Fill the DHW tank.
- Flush out the solar collector circuit.
- Fill the solar collector circuit.
b Fill the DHW tank before filling the solar collector
circuit.
b Only fill the solar collector circuit when the collec-
tors are cold.
FILLING THE DHW TANK
- Open and leave open the cock (5) for the domestic
cold water inlet (CWI).
- Open a hot water tap and fill the storage cylinder
with cold water from the mains supply. When water
starts coming out of the hot water tap, leave it run
until you obtain an even flow then close the tap. The
DHW tank is now full.
FLUSHING THE SOLAR COLLECTOR CIRCUIT
Carefully check all connections and unions for leaks be-
fore filling the system with the water and glycol mix. Use
the following procedure to test for water tightness. The
same procedure can also be used to flush out the circuit
to remove any residues.
- Connect the hose union on the filling/drain cock (1)
to a cold water tap using a length of hose pipe.
- Connect the union (2) on the storage cylinder to a
drain.
- Open the cock (1) and the cold water tap and leave
water flow into the solar collector circuit for a few
minutes.
- Close the cold water tap and the cock (1).
- Check all connections and unions for leaks.
EAF
Sc
UAC
5
2
1

12
INSTALLER
FILLING THE SOLAR COLLECTOR CIRCUIT
Heat transfer liquid
The anti-freeze supplied contains non-toxic, biodegrada-
ble and environmentally friendly propylene glycol. Mix the
propylene glycol with water (preferably demineralised).
Establish the necessary concentration of propylene gly-
col using the table alongside on the basis of the tempera-
tures for which anti-freeze protection is required.
b Only use the products listed in the BCatalogue
to top up the circuit.
Pressure and gravity lling
- Premix a sufficient volume of water and glycol solu-
tion in a suitable container, selecting the right con-
centration according to the table above.
Pressure filling
- Use lengths of rubber hose to connect a pump be-
tween the container and the hose union on the fill-
ing/drain cock (1). Open the cock.
- Start up the pump and fill the solar heating circuit
until the heat transfer liquid starts to flow out of the
fitting (2) at the top of the storage tank.
Gravity filling
- Use a length of rubber hose to connect the contain-
er to the filling/drain cock (1). Open the cock.
- Fill the solar heating circuit under gravity until the
heat transfer liquid starts to flow out of the fitting (2)
at the top of the storage tank.
When the storage cylinder is full:
- Close the cock (1).
- Fit the safety valve (3) to the fitting (2).
Anti-freeze Temperature Density (20 °C)
55% -40 °C 1,048 kg/dm3
50% -32 °C 1,045 kg/dm3
45% -26 °C 1,042 kg/dm3
40% -21 °C 1,037 kg/dm3
35% -17 °C 1,033 kg/dm3
30% -14 °C 1,029 kg/dm3
25% -10 °C 1,023 kg/dm3
1
2
3
1
2
3

13
TECHNICAL ASSISTANCE CENTRE
16 INITIAL STARTUP
Checks and preparations for initial start-up
Fill the storage cylinder with (potable) water.
Fill the solar collector circuit.
Make sure that the domestic cold water inlet
cock is open.
Make sure that the safety valves are functio-
ning.
Check the system for leaks.
Check the concentration of the anti-freeze.
Uncover the solar collectors and clean them
if necessary.
Make sure that the system is securely fixed
to the mounting frame.
Make sure that the roof does not leak.
Inspect the insulation.
17 MAINTENANCE
b The solar water heating system must be serviced periodically by B’s Technical Assistance Centre or by a qual-
ified heating engineer.
b The system should be serviced at least once a year, ideally in the autumn.
b Check the condition of the magnesium anode.
Visually inspect the collectors for damage/
dirt.
Visually inspect the storage cylinder.
Visually inspect the mounting frame and
roof anchor points.
Inspect the insulation.
Make sure that the roof does not leak.
Make sure that the safety valves are functio-
ning.
Check the system for leaks.
Check the concentration of the anti-freeze.
Check the pH of the anti-freeze with litmus
paper.
Topping up or changing the heat transfer
liquid
Clean inside the storage cylinder (every 2
years or more frequently in hard water/high
temperature areas)
Checking the heat transfer liquid
- Use an instrument like a refractometer or densimeter to check the density of the anti-freeze. If the value is below
that necessary to protect the system at the minimum temperature selected, replace the heat transfer liquid or add
anti-freeze.
- Use litmus paper to check the pH (nominal value approx. 7.5). If the measured value is below 7, change the heat
transfer liquid.
Storage cylinder components
1
3
2
5
4
6
1 Insulated storage cylinder
2 Flange
3 Sensor socket (1/2”)
4 Fitting for electrical heating element (accessory)
5 Flange cover
6 Magnesium anode
TechnicalAssistanceCentre

14
TECHNICAL ASSISTANCE CENTRE
Topping up or changing the heat transfer liquid
For certain maintenance operations (such as replacing
pipes or unions or changing the heat transfer liquid) the
solar collector (primary) circuit may have to be drained.
Proceed as follows:
- Connect a hose to the hose union on the filling/drain
cock (1).
- Open the cock (1).
- Remove the safety valve (2) to allow air into the pri-
mary circuit and allow the heat transfer liquid to flow
out.
b Only use the products listed in the BCatalogue
to top up the circuit.
b In areas where there is a significant risk of freezing,
take particular care over tightness testing and flush-
ing with water.
b DO NOT drain the solar collector circuit under sun-
ny conditions or when the collectors are hot.
Cleaning inside the storage cylinder
Proceed as follows to clean inside the storage cylinder:
- Close the domestic cold water inlet cock.
- Connect a hose to the storage cylinder drain cock
(D) fitted on installation, and open the cock. Leave
the water run out until the tank is completely empty.
- Unscrew the fixing screws and remove the flange
cover (1) from the left of the storage cylinder.
- Remove the nuts (2) and screw the bolt (3) in to re-
lease the flange (4) from the tank.
- Remove the flange (4). Check and clean the inside
of the tank.Check the condition of the seal (5). Re-
place if necessary.
- Check the magnesium anode (6) for wear and re-
place it if necessary.
- On completion of cleaning, follow the above steps in
the reverse order to refit all removed parts.
b Screw the bolt (3) out until the flange fits snugly
against the tank. Tighten the nuts (2) to secure the
flange (4), proceeding diagonally around the flange
to apply pressure uniformly around the seal.
2
1
EAF
UAC
Sc
1
24
6
5
3

15
END USER
END USER INSTRUCTIONS
The NS-SOL system is a solar hot water heating system that functions on the principle of natural circulation. The heat
transfer liquid therefore circulates by normal convection.
The system comprises one or more solar collectors and a jacket type storage cylinder, located above the collector/s.
The system does not require any pumps or adjustments.
18 PUTTING INTO SERVICE
The system must be put into service for the first time by B’s Technical Assistance Centre. After this it will continue to
function automatically.
19 MAINTENANCE
If the system is easily accessible, regularly check the cleanliness of the glass panel/s of the collector/s. If necessary,
clean the glass, but only when it is cold, preferably in the early morning. If access is difficult, contact your local Technical
Assistance Centre.
Once a year, check the condition of the insulation around the pipes.
If the system is not going to be used for an extended period of time, contact your local Technical Assistance Centre to
have it made safe.
b The solar water heating system must be serviced periodically by B’s Technical Assistance Centre or by a qual-
ified heating engineer.
b The system must be serviced at least once a year.
b If no domestic hot water is drawn off from the system, the safety valves of the domestic hot water and solar collector
circuits may open to discharge pressure and ensure correct functioning.
b These safety valves present a risk of burns or scalding. If a pressure in excess of 2.5 bar builds up in the solar col-
lector circuit, the safety valve opens.
b Check the condition of the magnesium anode regularly as it provides protection against corrosion.
b The system can reach very high temperatures (>150°C) under normal operating conditions. Take the greatest care
to avoid burns or scalding.
b In the event of any malfunctioning or failure, and to have parts replaced, contact B’s Technical Assistance
Centre.
Enduser

20050263 - Rev. 7 (01/14)
16
20 TROUBLESHOOTING
FAULT CAUSE SOLUTION
No or insufficient domestic hot
water production
Unusually high draw of DHW. - Check.
Water leaks in the DHW distribution
circuit. - Check.
Collector glass covered in dust or
leaves. - Clean.
The level of heat transfer liquid in the
circuit has dropped as the result of
leaks from the unions or because of
over-temperature during extended
periods of disuse.
- Top up the circuit with water/glycol
mix and bleed any air out.
Air bubbles have formed inside the
circuit and are impeding natural
circulation.
- Bleed the circuit by loosening the
uppermost union on the short pipe
until liquid comes out.
- Top up to replace any lost liquid.
Vibrations Loose screws. - Tighten the screws.
21 DISPOSAL
When the system is no longer needed, do not abandon it in the environment, but dispose of it through appropriate
channels and in compliance with applicable legislation.
Via Risorgimento, 13 - 23900 Lecco (LC) - Italy
Customer Service 199.13.31.31
www.berettaclima.it
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.