installation instructions

N-SOL
SYSTEM
INSTALLATION INSTRUCTIONS
SOLAR
INSTALLATION MANUAL
Dear Customer,
Thank you for choosing a BERETTA N-SOL natural circulation water heating system. You have
purchased an innovative, modern, and quality product that will provide comfort in the home
for many years to come. Arrange for your system to be serviced regularly by an authorised
BERETTA Technical Assistance Centre. Their personnel are specially trained to keep your system efficient and cheap to run. Technical Assistance Centres 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 BERETTA N-SOL solar
water heating system.
Please accept our renewed thanks for your purchase.
Beretta
The solar collectors used in BERETTA
natural circulation systems conform to EN standard 12975
2
RANGE
MODEL
CODE
N-SOL System 150/1 single
20020079
N-SOL System 200/1 single
20020080
N-SOL System 150/1 double
20020082
N-SOL System 200/1 double
20020083
N-SOL System 300/2
20021318
The following symbols are used in this manual:
b
CAUTION = Indicates actions that require caution and adequate preparation
a
STOP = Identifies actions that you MUST NOT do
This manual, Code 20020508 - Rev. 1 (03/11) is made up of 28 pages.
CONTENTS
1 GENERAL SAFETY INFORMATION .......................................................... 4
2 DESCRIPTION OF THE SYSTEM .............................................................. 5
Description ....................................................................................................................................................5
Safety devices ...............................................................................................................................................5
Identification ..................................................................................................................................................6
System layout................................................................................................................................................7
Installation on a flat roof .............................................................................................................................7
Installation on a sloping roof .......................................................................................................................8
Storage cylinder layout ...............................................................................................................................9
Water circuit ..................................................................................................................................................9
Technical specifications...............................................................................................................................10
Accessories .................................................................................................................................................10
3 INSTALLER ............................................................................................... 11
Unpacking the product ................................................................................................................................11
Dimensions and weight ...............................................................................................................................12
Handling ......................................................................................................................................................14
Preparing for installation .............................................................................................................................15
Assembly .....................................................................................................................................................16
Assembling the frame ...............................................................................................................................17
Assembling the pipes and water circuit components ...............................................................................18
Preparing for initial start-up .........................................................................................................................21
Initial start-up...............................................................................................................................................23
Maintenance ................................................................................................................................................23
Checks ........................................................................................................................................................25
4 TROUBLESHOOTING .............................................................................. 26
3
INSTALLATION MANUAL
1 GENERAL SAFETY INFORMATION
b The system is delivered in separate crates. b Insulate the domestic hot water pipes (hot
Check that it 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 system must be installed by a legally
qualified heating engineer. (In Italy, the law
regulating professional heating engineers
is Law 46 of the 5th March 1990.) On completion of the installation, the installer must
issue the owner with a declaration of conformity confirming that the installation has
been completed to the highest standards
in compliance with the instructions provided by BERETTA in this instruction manual,
and that it conforms to all applicable laws
and standards.
b If the system is installed in an area subject to strong winds or gusts, secure it
at suitable points. If necessary, tie down
the storage cylinder and solar collectors
with metal straps and install supporting
brackets at the sides.
b Make
sure that snow cannot build up
behind the storage cylinder since this
could place unacceptable static strain on
the roof.
b The system must only be used for the pur- b The installation of a natural circulation solar
pose specified by BERETTA and for which
it is designed.
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 If
4
and cold) with suitable material for local conditions. In particularly cold climates, insulate
all externally mounted accessories. In areas
subject to severe frosts, configure the system
so that the pipes can be drained if the system is not used during the winter months.
you notice any water or other liquid
leaking from the solar heating circuit, disconnect the system immediately from the
mains electricity supply, shut off the water
supply, and notify BERETTA's Technical
Assistance Service or a qualified heating
engineer immediately.
water heating system modifies the existing
structure of the roof.
With certain types of roof, especially those
over converted lofts, it may be necessary
to adopt additional precautionary measures to prevent water from infiltrating the
roof in windy or snowy conditions.
b Use a suitable sling to lift and move the
solar collector. The collector must not be
lifted by its fittings. Avoid subjecting the
collector to impacts or mechanical strain,
and take care to protect the glass panel.
b The liquid in the solar heating circuit can a Never attempt to install solar collectors
reach VERY HIGH TEMPERATURES, in
excess of 150°C. Beware of burns.
b Only use the anti-freeze liquid provided
by BERETTA to fill and top up the system. BERETTA anti-freeze contains nontoxic, biodegradable and environmentally
friendly propylene glycol, and is specially
designed for use in solar water heating
systems.
b Make sure that the water-glycol mix in the
primary circuit is able to resist the minimum
temperatures likely to occur in the place of
installation (e.g.: 40% glycol resists freezing down to -20°C).
on roofs without ensuring that all applicable standards governing safety at work
are met first.
a Never install solar collectors on roofs without an adequate lightning protection system.
a Never install the system without providing
a suitable drain for the solar heating circuit's safety valve.
a Never clean or service the system without
first disconnecting it from the mains electricity supply by turning the main power
switch and the control panel switch OFF.
b The system must be serviced at least once a Do not tamper with or adjust the safety or
a year.
b Make sure that the roof is strong enough
to support the weight of the system when
filled with water. Also make sure that the
section of roof chosen for the installation is
at a suitable angle to the sun (south facing
or at a maximum angle of 45° to the southeast or south-west), and not shaded during
the day by tall plants, trees, other houses,
mountains, etc.
control devices without prior authorisation
and instructions from the manufacturer.
a Never stop circulation in the solar heating
by means of valves or cocks.
a Do not dispose of packaging material
into the environment, or leave it within the
reach of children, since it can become a
potential hazard. Dispose of packaging
material in compliance with applicable legislation.
2 DESCRIPTION OF THE SYSTEM
2.1
Description
The N-SOL is a natural circulation, domestic water heating system for single homes,
designed for installation on flat or sloping
roofs.
It comes with all the parts necessary for a
complete installation, including all the accessories required for a quick start-up:
- solar collector/s
- solar storage cylinder with heating jacket
- mounting frame for collector/s and storage
cylinder
- connections between the solar collector/s
and the storage cylinder, complete with nonreturn valve and safety valve
- anti-freeze liquid (accessory).
2.2
Safety devices
The system is equipped with the following
safety devices:
- A primary circuit safety valve that opens if
pressure in the primary circuit rises above a
2.5 bar threshold.
- A secondary circuit safety valve that opens
if pressure in the secondary circuit rises
above a 10 bar / 99°C threshold.
b
Water may come out of the primary and
secondary circuit safety valves as a
result of variations in temperature and
pressure during the course of the day.
Make sure that there is a suitable drain
for any water coming from these valves.
b The operation of a safety device indicates
a potentially dangerous malfunction in
the system, and means that you must
contact BERETTA’s Technical Assistance
Service immediately.
b Safety devices must only be replaced by
BERETTA’s Technical Assistance Service
using original spare parts.
b Over-temperature protection requires an
adequate supply of cold water.
5
INSTALLATION MANUAL
6
2.3
Identification
N-SOL BERETTA systems are identified by two plates:
System data plate
This shows the model, product code, serial number, year of manufacture, storage cylinder
capacity and DHW circuit operating pressure.
Beretta Caldaie
Via Risorgimento,
1323900 Lecco (LC)
SISTEMA SOLARE A CIRCOLAZIONE NATURALE
NATURAL CIRCULATION SOLAR WATER HEATING SYSTEM
Mod.
Cod.
Serial N°
UAC
Tipo/Type
EAF
Anno
Year
Capacità bollitore
Storage cylinder capacity
Pressione di progetto acqua sanitaria
DHW circuit operating pressure
Pressione max circuito solare
Max solar heating circuit pressure
l
bar
bar
La protezione da sovratemperatura dipende dalla fornitura di acqua fredda sanitaria
Over-temperature protection requires an adequate supply of cold water
Collector data plate
This lists the technical specifications and performance of the solar collector.
Code
Year of production
Serial Number
Description
Flat plate solar
collector
Dimensions
Gross area
Aperture area
Absorber area
Empty weight
CODICE : 20008057
S/N :
08xxxxx
DESCRIZIONE : CP20TN
FABBRICATO IN ITALIA da RIELLO S.p.a.
COLLETTORE SOLARE PIANO
DIMENSIONI : 1856X1086X75 mm
SUPERFICIE LORDA : 2,02 m 2
SUPERFIC IE DI APERTURA : 1,81 m 2
SUPERFICIE ASSORBITORE : 1,76 m 2
PESO A VUOTO : 32 kg
MAX PRESSIONE ESERCIZIO : 10 bar
TEMP. MASSIMA : 136 °C
CONTENUT O LIQUIDO : 1,3 l
MAX CONCENTRAZIONE GLICOLE : 50 %
LIQUIDO TERMOVETTORE :
ACQUA+GLICOLE PROPILENICO
COLLEGAMENTO IN SERIE FINO AD UN MASSIMO DI 6 COLLETTORI
20008247
Made in Italy
by Riello S.p.A.
Maximum operating pressure
Stagnation temperature
Liquid content
Max glycol concentration
Heat transfer fluid:
water+propylene glycol
Up to max 6 collectors can be connected
Fig. 2.1
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
2.4
System layout
Installation on a flat roof
N-SOL 150/1 - 200/1
1
1
2
2
11
11
3
4
4
6
8
5 (*)
6
12
7
7
10
8
9
FRONT VIEW
SIDE VIEW
N-SOL 300/2
1
2
3
4
5
6
7
Primary circuit safety valve (2,5 bar)
Domestic hot water outlet - 3/4"
Non-return valve - Secondary circuit safety
valve (10 bar / 99 °C))
Domestic cold water inlet - 3/4"
Domestic cold water inlet cock
Solar collector outlet pipe
Collector/s
7
8
9
10
11
12
Plug
Filling/drain cock
Solar collector return pipe
Storage cylinder
Mounting frame
(*) (Not supplied. To be provided by
installer).
Fig. 2.2
INSTALLATION MANUAL
Installation on a sloping roof
N-SOL 150/1 - 200/1
1
1
2
2
11
11
3
4
5 (*)
6
4
12
8
7
10
7
8
9
FRONT VIEW
8
SIDE VIEW
N-SOL 300/2
1
2
3
4
5
6
7
Primary circuit safety valve (2,5 bar)
Domestic hot water outlet - 3/4"
Non-return valve - Secondary circuit safety
valve (10 bar / 99 °C))
Domestic cold water inlet - 3/4"
Domestic cold water inlet cock
Solar collector outlet pipe
Collector/s
8
9
10
11
12
Plug
Filling/drain cock
Solar collector return pipe
Storage cylinder
Mounting frame
(*) (Not supplied. To be provided by
installer).
Fig. 2.3
Storage cylinder layout
1
2
3
4
5
6
Insulated storage cylinder
Flange
Temperature sensor socket (1/2”)
Fitting for electrical heating element
(accessory)
Flange cover
Magnesium anode
1
2
3
4
5
6
Fig. 2.4
2.5
Water circuit
9
1
11
15
UAC
6
2
3
heat exchange
7
5
8
15
EAF
10
13
heat exchange
6
10
14
10
15
12
Connections to be made by the installer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Primary circuit safety valve (2.5 bar)
Non-return valve - Secondary circuit safety valve (10 bar
/ 99 °C)
Storage cylinder
Collector
DHW tank (secondary circuit)
Primary circuit
Temperature sensor socket
Magnesium anode
Primary circuit filling/drain cock
Disconnect valves
Insulation
DHW circuit expansion vessel
Pressure reducer
Softener filter
Drain
4
9
15
Fig. 2.5
INSTALLATION MANUAL
2.6
Technical specifications
Description
N-SOL 200/1
N-SOL 300/2
Collector
Collector surface area
2,02 x 1
2,02 x 2
m2 x n° pan.
Exposed area
1,81 x 1
1,81 x 2
m2 x n° pan.
Absorption area
1,77 x 1
1,77 x 2
m2 x n° pan.
Liquid content
1,35 x 1
1,35 x 2
l x n° pan.
Connections
for compression fittings, Ø 22
mm
Maximum permitted pressure
10
bar
Stagnation temperature
136
°C
1856 x 1086 x 75
mm
32
Kg
Dimensions
Empty weight
Storage cylinder
Type
Capacity
Dimensions (complete with insulation)
Empty weight
jacket
153
202
278
l
1190 x Ø 534
1510 x Ø 534
2000 x Ø 534
mm
55
65
90
Kg
Max DHW circuit pressure
10
bar
Max solar heating circuit pressure
2,5
bar
Water fittings (solar heating - DHW)
3/4" M
Fitting for electrical heating element
1" 1/4 F
Magnesium anode
10
N-SOL 150/1
22x300
22x300
22x400
Øxmm
153
202
278
l
Complete system
Storage cylinder
Collectors
2
n°
Recommended load range
50-170
1
200-250
200-350
l/day
Heat transfer liquid content
8,5
13,6
20,3
l
2.7
Accessories
The following accessories are available, to be ordered separately:
ACCESSORY
CODE
1.5 kW - 1"1/4 electrical heating element kit
20009201
Glycol anti-freeze (5 kg)
1150549
Glycol anti-freeze (2.5 kg)
20006441
Thermostatic mixer valve 1"
20001492
Bracket kit for natural circulation 150-200 l FR
20021236
Bracket kit for natural circulation 150-200 l SR
20021238
Bracket kit for natural circulation 300 l FR
20021253
Bracket kit for natural circulation 300 l SR
20021317
Omega bracket kit 150-200 l
20021244
Omega bracket kit 300 l
20021383
3 INSTALLER
3.1
Unpacking the product
N-SOL systems come in two separate packages. The actual contents of these vary
according to the number of collectors, the
capacity of the solar storage cylinder and the
size of the mounting frame.
First pallet
One system per pallet
Contents of first pallet:
- Solar collector/s
- Storage cylinder
- Water fittings
- The following items are delivered in a plastic
bag:
- Instruction manual
- Warranty certificate and barcode label
- Serial number plate.
- Glycol
Two systems per pallet
11
Fig. 3.1
Contents of second pallet:
- Pipes
- Mounting frame.
Second pallet
b
b
Fig. 3.2
The instruction manual is an integral part
of the N-SOL system. Read it thoroughly
and keep it safe.
Store both pallets in a dry area, well
away from the rain.
SYSTEM LAYOUT (installation on a flat roof)
N-SOL 150/1 - 200/1
912
H
INSTALLATION MANUAL
3.2
Dimensions and weight
160 160
896
1500
L
212
2160
12
N-SOL 300/2
896
231
896
L
Fig. 3.3
Description
N-SOL 150/1
N-SOL 200/1
N-SOL 300/2
Empty weight
~106
~116
~176
Full weight
~268
~332
~474
Kg
L
1220
1536
2325
mm
H
1607
1607
1607
mm
Kg
SYSTEM LAYOUT (installation on a sloping roof)
H
N-SOL 150/1 - 200/1
17
5÷
39
5
19
50
÷2
06
0
430 ÷ 830
L
13
N-SOL 300/2
430 ÷ 830
294÷694
430 ÷ 830
L
Fig. 3.4
Description
N-SOL 150/1
N-SOL 200/1
N-SOL 300/2
Empty weight
~96
~106
~169
Full weight
~258
~322
~467
Kg
L
1220
1536
2293
mm
H
720
720
720
mm
Kg
INSTALLATION MANUAL
3.3
Handling
Once you have removed the outer packaging,
proceed as follows to unpack and handle the
solar collector:
A
A
- 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.
A
A
Fig. 3.5
a Do not lift the solar collector by its fittings.
14
Fig. 3.6
Lift and move the storage cylinder in a horizontal position. Make sure that the slings and
lifting gear used are suitable for the weight.
a Do not lift the storage cylinder by its
fittings.
a Do
not dispose of packaging material into the environment, or leave it
within the reach of children, since it can
become a potential hazard. Dispose of
packaging material in compliance with
applicable legislation.
b
Wear suitable personal protective equipment and use suitable safety devices.
Fig. 3.7
3.4
Preparing for installation
Before you start assembling the solar water
heating system, check:
- hat the contents are all present and undamaged
- that the roof is strong enough to support the
weight and that there are no leaks
- the best possible orientation of the solar collectors (ideally facing south). Avoid locating
collectors in the shadow of tall trees, etc.
- that the installation surface is stable. Remove
any gravel and similar material.
b
>1
b
m
1m
>
Fig. 3.8
b
Fig. 3.9
Arrange for any major roof repairs, especially bitumen waterproofing, to be performed by specialists.
Before commencing installation, make sure
that there is a minimum distance of one metre
between the mounting frame and the edge of
the flat roof.
b
~ 10 - 20 mm
Replace any defective parts immediately, using only manufacturer’s original
spare parts.
The above measurements only indicate
the net width required for the assembled
collectors.
Allow at least another 0.5 metres to the
right and left of the assembled collectors for the necessary piping.
Keep the left of the storage cylinder
some 10 to 20 mm higher than to the
right to facilitate bleeding.
When installing the collector parallel to a
sloping roof, use the adjuster nuts on the
roof fixing brackets. (See the relevant
instructions.)
15
INSTALLATION MANUAL
16
3.5
Assembly
GENERAL INSTRUCTIONS
Instructions for assembly
The system must be installed by specialist personnel. Use only the assembly material supplied.
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 system must only be installed on roofs or
frames that are strong enough to support its
weight. The static load capacity of the roof or any
supporting structure must be verified on site prior
to the installation of the system. Take special care
to make sure that the roof timbers are suitable
for the fixing screws of the natural circulation solar water heating system. The constructor of the roof structure must verify that the roof
conforms to all applicable laws and standards
in the country of installation, especially in areas
subject to heavy snowfall or strong winds (note:
1 m³ of dry snow weighs ~ 60 kg / 1 m³ of wet
snow weighs ~ 200 kg). When installing systems
in such areas, all weather features that might add
to the strain on the roof must be taken into consideration (Foehn effect, funnel effect, vortex formation, etc.).
Lightning protection / building potential compensation
It is generally not necessary to connect natural circulation systems to the building’s lightning protection system. (Make sure, however, that you conform to all relevant national standards!) If you are
installing a system over a metallic roof frame, consult an authorised lightning protection specialist.
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 mm2. Alternatively, the solar collector piping may be connected to ground via a
ground wire sunk into the earth. This ground wire
must be routed outside the building. The ground
wire must be connected to the potential compensation bar through a wire of the same diameter.
Solar panel connections
The collectors must be connected to each other
and to the connecting pipes by means of a lock
ring connection.
Use a grip or wrench to hold the fixed part of the
union steady while tightening the pipe union, to
avoid damaging the absorber.
Make sure that the pipes connecting the collector to the hot water storage cylinder always slope
upwards.
It is essential to fit the safety valve provided to limit
overpressure in the solar water heating circuit.
Water connections
Water connections must conform to DIN standards 1988 and 4753. (Also respect all applicable
national standards!) All unused fittings must be
plugged. The operating pressure limits specified
on the data plate must never be exceeded. It may
prove necessary to fit a pressure reducer.
It is essential to fit the storage cylinder with the
safety valve provided to limit overpressure in the
water circuit.
A thermal mixing valve must always be connected
to the hot water outlet to control water temperature
in the DHW circuit.
Flushing and filling
For safety reasons, fill the system either when the
sun is not shining or after having covered the collectors. Always fill the storage tank with domestic
water before filling the solar heating circuit. Use
a 25% anti-freeze to water solution, especially in
areas at risk of frost.
b
The anti-freeze solution must be mixed with
water prior to filling the system.
Indication: 25% anti-freeze solution --> freezing
point: -10°C
It may not be possible to completely empty the
collectors once filled. For this reason, in areas at
risk of freezing, the collectors must be filled with a
solution of water and anti-freeze even for functioning and pressure tests.
Operating pressure
Maximum operating pressure for the solar water
heating circuit is 2.5 bar, while that for the DHW
circuit is 10 bar.
Bleeding
Bleed the system at the following intervals:
- On start-up (after initial filling)
- 4 weeks after start-up
- Whenever necessary, as in the event of system
malfunctioning.
b
The heat transfer liquid can be hot! Risk of
scalding!
Only open the vent valve if the temperature
of the fluid in the circuit is below 60 °C.
Make sure that the collectors are cold before
you bleed the circuit. Cover the solar collectors before bleeding the circuit. Perform
bleeding in the morning if possible.
Assembling the frame
b
Two persons are needed to assemble the system in its entirety.
Follow the instructions provided with the mounting frame to assemble it.
INSTALLATION ON A FLAT ROOF
N-SOL 300/2
N-SOL 150/1 - 200/1
17
INSTALLATION ON A SLOPING ROOF
N-SOL 150/1 - 200/1
N-SOL 300/2
Fig. 3.10
INSTALLATION MANUAL
Assembling the pipes and water circuit components
INSTALLATION ON A FLAT ROOF
N-SOL 150/1 - 200/1
12
1
11
7
2
13
3
8
B
9
A
4
5
6
10
18
N-SOL 300/2
12
1
11
2
7
3
A
13
8
B
4
9
5
6
10
Fig. 3.11
b
A drain hose (not supplied) must be connected to the outlets of the safety valves (12) and (13).
Proceed as follows to assemble N-SOL systems:
- Fit the elbows (1) and (7) to the storage
cylinder.
- Assemble the collector outlet piping (A)
including the pipe (2), union (3), pipe (4),
T-union (5) and cock (6), then fit the assembled piping to the storage cylinder and
collector.
- Assemble the storage cylinder return piping
(B) including the pipe (8) and elbow (9),
then fit the assembled piping to the storage
cylinder and collector.
- Fit the plugs (10) and (11) to the unused
collector fittings.
- Fit the safety/non-return valve (13) to the
cold water inlet on the storage cylinder.
- Connect up the storage cylinder’s DHW inlet
and outlet.
- Fill the system as instructed in the section
"Preparing for initial start-up", then fit the
safety valve (12) to the storage cylinder.
b
b
b
The domestic hot water circuit MUST
include an expansion vessel and a storage cylinder drain cock.
The safety valves must be connected to
a suitable collection and drain system.
The manufacturer declines all responsibility for damage caused by water
escaping from the safety valves.
The choice of system components and
the method of their installation are left
up to the heating engineer installing
the system. Installers must use their
expertise to ensure proper installation
and functioning in compliance with all
applicable legislation.
19
INSTALLATION MANUAL
INSTALLATION ON A SLOPING ROOF
N-SOL 150/1 - 200/1
12
1
2
11
A
7
3
13
4
8
56
9
B
10
20
N-SOL 300/2
12
11
2
1
A
3
4
13
7
56
8
B
9
10
Fig. 3.12
b
A drain hose (not supplied) must be connected to the outlets of the safety valves (12) and (13).
Proceed as follows to assemble N-SOL systems:
- Fit the elbows (1) and (7) to the storage
cylinder.
- Assemble the collector outlet piping (A)
including the pipe (2), union (3), pipe (4),
T-union (5) and cock (6), then fit the assembled piping to the storage cylinder and
collector.
- Assemble the storage cylinder return piping
(B) including the pipe (8) and elbow (9),
then fit the assembled piping to the storage
cylinder and collector.
- Fit the plugs (10) and (11) to the unused
collector fittings.
- Fit the safety/non-return valve (13) to the
cold water inlet on the storage cylinder.
- Connect up the storage cylinder’s DHW inlet
and outlet.
- Fill the system as instructed in the section
"Preparing for initial start-up", then fit the
safety valve (12) to the storage cylinder.
b
b
b
The domestic hot water circuit MUST
include an expansion vessel and a storage cylinder drain cock.
The safety valves must be connected to
a suitable collection and drain system.
The manufacturer declines all responsibility for damage caused by water
escaping from the safety valves.
The choice of system components and
the method of their installation are left
up to the heating engineer installing
the system. Installers must use their
expertise to ensure proper installation
and functioning in compliance with all
applicable legislation.
21
3.6
Preparing for initial start-up
FLUSHING THE SYSTEM
2
Carefully check all connections and unions for
leaks before 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 closed circuit
to remove any residues.
1
Fig. 3.13
- 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 heating
circuit for a few minutes.
- Close the cold water tap and the cock (1).
- Check all connections and unions for leaks.
INSTALLATION MANUAL
22
FILLING THE SYSTEM
The anti-freeze supplied contains non-toxic,
biodegradable and environmentally friendly
propylene glycol. Mix the propylene glycol
with water (preferably demineralised), by
pouring the glycol into a container of water
and not vice-versa.
Establish the necessary concentration of glycol using the table alongside. The temperatures given in the table define the level of
Anti-freeze
Temperature
Density (20 °C)
50%
-32,4 °C
1,045 kg/dm3
40%
-21,5 °C
1,038 kg/dm3
30%
-14,0 °C
1,029 kg/dm3
20%
-7,8 °C
1,018 kg/dm3
18%
-6,8 °C
1,016 kg/dm3
15%
-5,5 °C
1,013 kg/dm3
anti-freeze protection provided.
b Fill the domestic hot water tank before
filling the solar heating circuit.
a DO NOT fill the collector circuit under
sunny conditions or when the collectors
are hot.
FILLING THE TANK
- Open and leave open the cock (5) on the
domestic cold water inlet, to be provided by
the installer.
- Open a hot water user tap and fill the storage cylinder with cold water from the mains
supply. When water starts coming out of
the hot water user tap, leave it run until you
obtain an even flow then close the tap. The
storage cylinder is now full.
UAC
EAF
5
Sc
Fig. 3.14
FILLING THE SOLAR HEATING CIRCUIT
Filling with a pump
- Premix a sufficient volume of water and glycol solution in a suitable container, selecting
the right concentration according to the
table above.
- Use lengths of rubber hose to connect a
pump between the container and the hose
union on the filling/drain cock (1). Open the
cock.
- Start up the pump and fill the solar heating
circuit until the heat transfer fluid starts to
flow out of the fitting (2) at the top of the
storage tank.
- Close the cock (1).
- Fit the safety valve (3) to the fitting (2).
3
2
1
Fig. 3.15
Gravity filling
- Premix a sufficient volume of water and glycol solution in a suitable container, selecting
the right concentration according to the
table above. Position the container above
the storage cylinder.
- Use a length of rubber hose to connect the
container to the filling/drain cock (1). Open
the cock.
- Fill the solar heating circuit under gravity
until the heat transfer fluid starts to flow out
of the fitting (2) at the top of the storage
tank.
- Close the cock (1).
- Fit the safety valve (3) to the fitting (2).
Keep higher than the
storage cylinder
3
2
The system is now ready to start up. Uncover
the collectors and clean the glass panels. The
solar water heating system will begin functioning automatically.
1
b
Fig. 3.16
If a pressure in excess of 2.5 bar builds
up in the solar heating circuit, the safety
valve opens. It is not possible to control
the direction in which steam is released.
Therefore, avoid standing near the safety valves while the system is functioning.
23
3.7
Initial start-up
Perform the following steps before starting
up the system. Once the N-SOL system has
been filled and the necessary tests have been
completed:
- Make sure that the domestic cold water inlet
cock is open.
- Check the system for leaks.
3.8
Maintenance
b
The solar water heating system must
be serviced periodically by BERETTA's
Technical Assistance Service or by a
qualified heating engineer.
Once a year check the collectors and the
storage cylinder visually for any damage and
accumulated dirt, and check that there are
no leaks.
Check the level and concentration of the antifreeze solution every two years.
At least every two years have the storage
cylinder checked and cleaned by a qualified
heating engineer.
Clean the storage cylinder more frequently
in areas with hard or very hard water, and in
areas subject to major temperature variations.
INSTALLATION MANUAL
24
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 (Sc) fitted on installation, and open the
cock. Leave the water run out until the tank
is completely empty.
UAC
EAF
Sc
Fig. 3.17
- 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 release 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). Replace
as necessary.
- Check the anode (6) for wear and replace it
if necessary.
- On completion of cleaning, follow the above
steps in the reverse order to refit all removed
parts.
b
5
6
2
4
1
3
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.
Fig. 3.18
For certain maintenance operations (such as
the replacement of pipes or unions) the solar
heating circuit (primary circuit) may have to
be drained.
2
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 primary circuit and allow the heat transfer fluid to flow out.
b
1
Fig. 3.19
In areas where there is a significant risk
of freezing, take particular care over
tightness testing and flushing with water.
a DO NOT drain the collector circuit under
sunny conditions or when the collectors
are hot.
25
3.9
Checks
DESCRIPTION
Collector circuit
Collector circuit tightness test
OK
On completion of the installation, perform the
checks listed in the table below.
Checking the heat transfer liquid
Safety valve check
Solar heating circuit bleeding
Solar collectors
Visual check of collectors
Collectors cleaned if necessary
Check of collector fixing points
Visual check of roof impermeability
Visual check of insulation/lagging
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 effectiveness of the
anti-freeze (which must have a nominal protection value of approx. -30°C). If protection
falls below the threshold of -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 MANUAL
4 TROUBLESHOOTING
FAULT
CAUSE
No or insufficient domestic hot
water production
Unusually high draw of DHW.
- Check.
Water leaks in the DHW distribution circuit
- Check.
The solar panels are dirty or covered in leaves, or buildings or
other obstacles have appeared
after the installation of the system
and are blocking out the rays of
the sun.
- Clean.
The level of heat transfer liquid in
the circuit has dropped as the result
of leaks from the unions in the circuit
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 closed 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
SOLUTION
- Tighten the screws
26
The supplementary electric
heating element (accessory) is
not working
- Turn the heating element off at
its switch and call BERETTA’s
Technical Assistance Service
Cod. 20020508
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.