installation manual

STORAGE
CYLINDER
IDRA DS FI
INSTALLATION MANUAL
SOLAR
INSTALLATION MANUAL
Dear Installer,
Thank you for choosing a BERETTA IDRA DS FI solar storage cylinder. You have purchased
a modern, quality product that is designed to give dependable and safe service, and to provide
comfort in the home for many years to come. Arrange for the storage cylinder to be serviced
regularly by an authorised BERETTA Technical Assistance Centre. Their personnel are specially
trained to keep your storage cylinder 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 IDRA DS FI solar
storage cylinder.
Please accept our renewed thanks for your purchase.
Beretta
2
RANGE
MODEL
CODE
IDRA DS 200 FI BERETTA
20026189
IDRA DS 300 FI BERETTA
20026192
IDRA DS 430 FI BERETTA
20026194
IDRA DS 550 FI BERETTA
20026196
The following symbols are used in this manual:
bbCAUTION! = Indicates actions that require caution and adequate preparation
aaSTOP! = Identifies actions that your MUST NOT do
This manual, Code. 20026261 - Rev. 5 (03/14) is made up of 24 pages.
CONTENTS
1 GENERAL SAFETY INFORMATION........................................................... 4
2 PRODUCT DESCRIPTION.......................................................................... 5
Description.....................................................................................................................................................5
Identification...................................................................................................................................................5
Design............................................................................................................................................................6
Technical specifications..................................................................................................................................7
Accessories....................................................................................................................................................8
Water circuit...................................................................................................................................................9
3INSTALLATION.......................................................................................... 10
Unpacking the product.................................................................................................................................10
Dimensions and weight................................................................................................................................10
Handling.......................................................................................................................................................11
Place of installation......................................................................................................................................11
Installation in older systems and systems requiring modernisation.............................................................11
Water connections........................................................................................................................................12
Location of probes.......................................................................................................................................14
Preparing for initial start-up..........................................................................................................................14
Initial start-up................................................................................................................................................16
Checks during and after initial start-up........................................................................................................17
Preparing for extended periods of disuse....................................................................................................18
Maintenance.................................................................................................................................................18
Cleaning and removing internal components..............................................................................................20
4RECYCLING/DISPOSAL........................................................................... 21
Recycling/disposal.......................................................................................................................................21
5TROUBLESHOOTING............................................................................... 21
3
INSTALLATION MANUAL
4
1 GENERAL SAFETY INFORMATION
bbAs soon as you open the packaging, check
immediately that the contents are all present
and undamaged. Contact the BERETTA
reseller from whom you purchased the
product if you notice any problems.
The operation of any appliance that uses
electrical power and water demands that a
number of fundamental safety precautions be
respected. In particular:
o not allow children or infirm persons to
bbThis BERETTA IDRA DS FI solar stor- aDoperate
the storage cylinder unsupervised.
age cylinder must be installed by a
qualified installer. On completion of the
aDo not touch the storage cylinder when
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.
barefoot or wet.
aNever clean or service the storage cylin-
der without first disconnecting it from the
mains electricity supply by turning the
main power switch and the control panel
switch OFF.
interfere with any control devicbThis BERETTA IDRA DS FI solar stor- aDeso not
without specific authorisation and
age cylinder must only be used for the
purpose specified by BERETTA and for
which it is designed. BERETTA declines
all responsibility, contractual or other, for
damage to property or injury to persons
or animals caused by improper installation, adjustment, maintenance or use.
bIf you notice any water leaking from the
cylinder, disconnect it immediately from
the mains electricity supply, shut off the
water supply, and notify your BERETTA
Technical Assistance Centre or a qualified technician immediately.
instructions from the manufacturer.
aNever pull, disconnect, or twist the elec-
trical cables coming from the appliance
even if it is disconnected from the mains
electricity supply.
aDo not expose the storage cylinder to
the elements. It is not designed for use
outdoors.
aDo not leave packaging material with-
in the reach of children, since it can
become a potential hazard.
f the pressure in the solar heating circuit
bThis storage cylinder must be serviced aIdrops,
do not top up with water alone,
at least once a year.
bIf the solar storage cylinder is not going
to be used for an extended period of
time, prepare it for shut-down as follows:
- Drain the solar heating circuit
-Close the shut-off cocks for the
domestic hot water circuit
- Shut down the boiler as instructed in
its own manual
-
Turn the system’s main power switch OFF.
bAnti-freeze (propylene glycol) is available
separately and must be mixed with water
in a percentage varying from 30% to 50%
as instructed in the relevante BERETTA
installation and maintenance manual.
bOnly fill the solar heating system with
water and glycol premixed in the percentages specified in the BERETTA
installation and maintenance manual.
bThis instruction manual is an integral
part of the storage cylinder. It must be
kept safe and must ALWAYS accompany
the appliance, 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 BERETTA
Technical Assistance Centre.
since this increases the risk of damage
from freezing.
aDo not use connections or safety devices
or fittings (expansion vessels, pipes, insulation) that are not specifically designed
and tested for use in solar heating installations.
2 PRODUCT DESCRIPTION
2.1
Description
BERETTA IDRA DS FI, solar storage cylinders are double coil units of 200, 300, 430 or 550
litres in capacity, and are specifically designed for integration in domestic hot water production
systems heated by BERETTA solar collectors.
The most important technical features of these storage cylinders are:
-- The cylinder and coils are specially designed
and shaped for optimum performance in
terms of stratification, heat exchange and
replenishment times
-- The cylinder lining is bacteriologically inert
for maximum hygiene, reduced lime scale
deposits and easy cleaning.
-- Water fittings are available at different
heights, permitting different hot water generators to be used without reducing stratification effect.
-- CFC-free polyurethane insulation and an
elegant external coating reduce heat loss
and improve efficiency.
-- Temperature sensor and power cables are
all internally routed.
-- A flange is provided for easy cleaning and
maintenance and a magnesium anode is
provided to prevent corrosion.
BERETTA IDRA DS FI storage cylinders can
be connected to a special solar controller and
can be integrated in solar heating systems
in which BERETTA boilers or water heaters
serve as auxiliary heat generators.
2.2
Identification
5
BERETTA IDRA DS FI solar storage cylinders are identified by two plates:
Beretta Caldaie
Via Risorgimento, 13
23900 Lecco (LC)
–Data plate
This lists the technical specifications and performance of the product.
SOLAR STORAGE CYLINDER
Serial
number
Model
Code
Year
Maximum absorbed power [Primary T = 80°C]
kW
Specific top flow rate [∆T 35°C]
l/1'
Bottom maximum power consumption [Primary T = 80°C]
kW
Specific bottom flow rate [∆T 35°C]
l/1'
Maximum working pressure of cylinder
bar
Storage cylinder capacity
l
Electrical consumption
W
Power supply
V-Hz
Obligatory ground connection
–Serial number plate
This specifies the serial number, model, consumption and capacity.
Beretta Caldaie
Via Risorgimento, 13
23900 Lecco (LC)
Serial number
Model
Maximum
absorbed power
kW
Bottom max.
power consumption
kW
bbIf these plates or any other means of clearly identifying the product are defaced, removed or lost, proper
installation and servicing may be rendered difficult.
INSTALLATION MANUAL
2.3
Design
1
FROM COLLECTOR
2
3
4
5
6
TO COLLECTOR
14
13
12
11
10
9
8
SAFETY DRAIN
TO EXPANSION
VESSEL
7
6
1 BERETTA IDRA DS FI solar storage cylinder
2 Outlet temperature gauge
3 Outlet valve M
4 Return temperature gauge
5 Solar regulator
6 Flow regulator
7 Sensor/power cable entrancee
8 Flow meter (l/min)
9 Cock B
10 Pump
11 Pressure gauge
12 Cock A
13 Safety valve (6 bar)
14 Return valve R
Fig. 2.1
2.4
Technical specifications
DESCRIPTION
IDRA DS
200 FI
300 FI
430 FI
550 FI
298
433
546
l
1840
1630
1980
mm
Storage cylinder type
Vitrified
Cylinder layout
Vertical
Heat exchanger layout
Storage cylinder capacity
Vertical
203
Diameter of storage cylinder with insulation
Height with insulation
605
1330
755
Insulation thickness
mm
50
Diameter/length of magnesium anode
mm
33/450
33/520
Flange diameter
mm
118
mm
Diameter/length of probe well
16/175
mm
Sleeve for electric heating element (not supplied)
1"1/2 F
Ø
Bottom coil water capacity
5,7
9,3
11,0
12,8
l
Top coil water capacity
4,1
5,5
7,1
8,0
l
Bottom coil heat exchange surface area
0,94
1,53
1,80
2,10
m2
Top coil heat exchange surface area
0,68
0,91
1,17
1,31
m2
Maximum working pressure of storage cylinder
10
bar
Maximum working pressure of coils
10
bar
Maximum working temperature
99
°C
Net weight with insulation
105
Heat loss according to EN 12897:2006
2,79
∆T=45 °C
Performance achieved with Primary Temperature 60°C (*)
130
162
175
kg
kWh
/24h
2,24
2,18
2,74
Power absorbed by bottom coil
16,0
24,4
27,0
32,0
kW
Power absorbed by top coil
11,0
15,8
19,5
23,4
kW
Domestic hot water production – bottom coil
393
600
663
786
l/h
Domestic hot water production – top coil
270
388
480
575
l/h
44,9
kW
Performance achieved with Primary Temperature 70°C (*)
Power absorbed by bottom coil
22,2
34,3
38,0
Power absorbed by top coil
15,7
21,7
27,5
31,8
kW
Domestic hot water production – bottom coil
543
842
934
1100
l/h
Domestic hot water production – top coil
386
532
676
781
l/h
Performance achieved with Primary Temperature 80°C (*)
Power absorbed by bottom coil
29,5
46,6
52,0
62,0
kW
Power absorbed by top coil
20,7
30,6
36,5
43,0
kW
Domestic hot water production – bottom coil
725
1145
1278
1523
l/h
Domestic hot water production – top coil
508
753
897
1056
l/h
57,0
65,0
73,0
kW
Performance achieved with Primary Temperature 90°C (*)
Power absorbed by bottom coil
36,8
Power absorbed by top coil
26,3
38,0
45,0
53,0
kW
Domestic hot water production – bottom coil
904
1400
1597
1793
l/h
Domestic hot water production – top coil
646
934
1105
1300
l/h
(*) With ∆T= 35°C.
Performance achieved with filling pump set to 3000 l/h, and using heat generators of suitable power.
7
TOP COIL IDRA DS FI
600
550
PRESSURE DROP (mbar)
INSTALLATION MANUAL
Pressure drop
500
Mod. 550
450
Mod. 430
Mod. 300
Mod. 200
400
350
300
250
200
150
100
50
0
0
500
1000
1500
2000
2500
3000
3500
FLOW RATE (l/h)
4000
4500
5000
5500
6000
Fig. 2.2
Residual head for water return group pump installed in models BERETTA IDRA DS FI.
500
8
RESIDUAL HEAD (mbar)
450
400
350
300
250
200
150
100
50
0
0
200
400
600
FLOW RATE (l/h)
2.5
Accessories
See catalog.
III
II
I
800
1000
1200
Fig. 2.3
2.6
Water circuit
DAL
FROMCOLLETTORE
COLLECTOR
AD
2
10
AL
COLLETTORE
TO
COLLECTOR
3
4
2
7
UAC
TR
MC
5
6
8
IN
SAFETY
SICUREZZA
DRAIN
RC
RE
1
RL
9
EAF
9
(SB)
1 BERETTA IDRA DS FI solar storage
cylinder
2 Temperature gauge
3 Return valve R
(functions as non-return valve)
4 Pressure gauge
5 Pump
6 Flow meter (l/min)
7 Safety valve (6 bar)
8 Heat transfer fluid recovery
9 Floor standing expansion vessel (not
supplied)
10 Outlet valve M
TR Temperature gauge
RE Sleeve for electric heating element
(not supplied)
AD Magnesium anode
UAC Domestic hot water outlet
MC Outlet from boiler
RC Return to boiler
RL DHW recirculation
EAF Domestic cold water inlet
SB Storage cylinder drain
Fig. 2.4
INSTALLATION MANUAL
3 INSTALLATION
3.1
Unpacking the product
BERETTA IDRA DS FI solar storage cylinders
come in a robust palletised wooden cage,
protected by a PVC sheet.
The following items are delivered in a plastic
bag inside the packaging:
-- instruction manual
-- certificate of warranty and label with bar code
-- hydraulic test certificate
-- spare parts catalogue.
bbThe instruction manual is an integral part
of the solar storage cylinder. Once located, read it thoroughly and keep it safe.
Fig. 3.1
3.2
Dimensions and weight
10
H
Description
A
B
H
Net weight
200
MODEL
300
430
605
825
1330
1840
105
130
550
755
975
1630
1980
162
175
mm
mm
mm
kg
A
B
Fig. 3.2
3.3
Handling
2
3
Make sure that any lifting equipment is of
adequate capacity to lift and move the storage cylinder.
Remove the brackets (1) to free the storage
cylinder.
To lift the storage cylinder, remove the plug (2)
and screw an eyebolt (Ø 10 mm) of suitable
capacity for the weight of the cylinder into the
hole (3).
Fit the feet provided into the holes in the bottom of the storage cylinder and adjust as
necessary.
bThe
casing and insulation can be
removed to facilitate access into the
boiler room.
bWear suitable personal protective equip-
1
ment and use suitable safety devices.
aDo not leave packaging material within the reach of children, since it can
become a potential hazard.
1
Fig. 3.3
11
3.4
Place of installation
BERETTA IDRA DS FI solar storage cylinders can be installed in any room where there is no
specific requirement for an electrical protection rating higher than IP X0D.
bThe room where the appliance is installed must, however, be dry to prevent the formation
of rust.
bSpecified minimum distances must be respected, and the space in which the storage cyl-
inder is to be installed must be easily accessible in order to permit easy installation and
assembly and subsequent inspection, maintenance and repair. In particular, access must
permit the storage cylinder to be removed without disassembly at the end of its useful life,
and another unit to be installed in its place. Users are therefore responsible for any costs
incurred to demolish masonry or other structures preventing or impeding free access to the
space where the storage cylinder is to be installed.
3.5
Installation in older systems and
systems requiring modernisation
REFERENCE VALUES
pH
6-8
Electrical conductivity
below 200 mV/cm (25°C)
Chlorine ions
below 50 ppm
Sulphuric acid ions
below 50 ppm
Total iron
below 0,3 ppm
Alkalinity M
below 50 ppm
Total hardness
below 35°F
Sulphur ions
none
Ammonia ions
none
Silicon ions
below 30 ppm
When installing BERETTA IDRA DS FI in old
systems or systems requiring modernisation,
always perform the following checks:
-- Make sure that the system is fitted with safety
and control devices in accordance with applicable legislation and standards.
-- Make sure that the circuit has been flushed out
to remove all sludge and lime scale, and has
been vented and seal tested.
-- Make sure that a suitable water treatment
system is installed if the quality of the supply/
recirculation water so demands. (Refer to the
reference values listed in the table alongside.)
BERETTA IDRA DS FI solar storage cylinders can be connected to even previously installed hot
water generators provided they are of adequate output power, but care must be taken to ensure
correct water flow directions. Water fittings have the following specifications:
IDRA DS 200 FI - IDRA DS 430 FI
IDRA DS 300 FI - IDRA DS 550 FI
AD
AD
M
Psr
I
B
(*)
L
G
N
D
RL
C
L
EAF (SB)
E
A
I
H
O
DSA
E
EAF (SB)
Psr
F
B
G
N
D
RL
(*)
RC
RE
O
DSA
Hoses
MC
R
Psc
RC
RE
ICP
H
R
TR
Hoses
MC
UAC
Psc
A
12
M
ICP
F
TR
UAC
C
INSTALLATION MANUAL
3.6
Water connections
Fig. 3.4
DESCRIPTION
UAC
- Domestic hot water outlet
MC
- Outlet from boiler
RC
- Return to boiler
M
- Solar outlet
R
- Solar return
RL
- DHW recirculation
EAF (SB)- Domestic cold water inlet (storage cylinder drain)
Psc
- Diameter/length of boiler sensor socket
Psr
- Diameter/length of solar controller sensor socket
RE
- Sleeve for electric heating element (not supplied)
AD
- Diameter/length of magnesium anode
TR
- Temperature gauge
DSA
- Sensor/power cable entrance
ICP
- Rear cable entrance
A
B
C
D
E
F
G
H
I
L
N
O
IDRA DS
200 FI
IDRA DS
300 FI
IDRA DS
430 FI
1” F
1” F
1” F
1” M
1” M
3/4” F
1” F
16/175
16/175
1”1/2 F
33/450
365
625
675
1000
170
425
140
645
725
840
1005
1170
IDRA DS
550 FI
33/520
365
875
955
1490
170
445
430
955
1035
1200
1410
1670
460
860
910
1330
205
480
300
870
960
1125
1330
1440
460
960
1080
1650
205
505
445
1030
1130
1290
1540
1785
Ø
Ø
Ø
Ø
Ø
Ø
Ø
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
Typical installation schematic
RC
4
8
PRIMARIO
PRIMARY
4
1
M
1
R
3
2
14
7
4
5
4
15
5
9
UAC
RL
9
Ingresso
Outlet
11
MC
4
Uscita
Inlet
10
4
4
SB
6
8
4
4 12
13
4
EAF
7
1 Solar collector
2 BERETTA IDRA DS FI solar storage
cylinders
3 Collector probe
4 Isolating valves
5 Non-return valve
6 Safety valve
7 Drain
8 Expansion vessel
(18 litres not supplied)
9 Pump
10 Vent cock
11 Manual bleed valve (accessory)
13
12 Softener filter
13 Pressure reducer
14 Mixer valve
15 Solar regulator
UAC - Domestic hot water outlet
MC - Boiler outlet
RC - Boiler return
M - Collector outlet
R
- Collector return
RL - DHW recirculation
EAF - Domestic cold water inlet
SB - Storage cylinder drain
Fig. 3.5
bThe domestic hot water system MUST
INCLUDE an expansion vessel, safety
valve, automatic vent valve and storage
cylinder drain cock.
bThe safety valve must be connected to
a suitable collection and drain system.
The manufacturer declines all responsibility for damage caused by water
escaping from the safety valve.
bThe choice of system components and
the method of their installation are left
up to the installer. Installers must use
their expertise to ensure proper installation and functioning in compliance with
all applicable legislation.
bCircuits filled with anti-freeze must be fitted with water disconnectors.
INSTALLATION MANUAL
3.7
Location of probes
BERETTA IDRA DS FI solar storage cylinders incorporate probe wells for fitting the solar controller and boiler probes.
bbInstallers are responsible for all con-
nections to the boiler or hot water
generator. Installers must ensure
proper installation and functioning
in compliance with all applicable legislation.
Rear cable entrance
Well for boiler probe
(already fitted)
Well for solar controller
probe (already fitted)
Fig. 3.6
14
3.8
Preparing for initial start-up
- Connect the safety valve drain to a pipe (T)
to avoid burns from expelled fluid and to
permit the heat transfer fluid to be recovered.
- Connect up the expansion vessel (E), which
is designed for use in solar water heating
systems.
-Connect the pump and the sensors to the
solar regulator (if provided) as instructed in
the manual supplied with the regulator.
T
IN
SAFETY
SICUREZZA
DRAIN
E
Fig. 3.7
FLUSHING THE SYSTEM
M
Outlet
group
Return
group
-Turn the knob of the outlet valve (M) and
return valve (R) fully anti-clockwise.
R
-Close the flow regulator (V) (so that the
screw slot is horizontal).
B
-Open the cocks (A) and (B) on the return
group.
-Pump water in through the cock (B) and
wait for it to come out of the cock (A).
Leave water flow through the system until it
has been thoroughly flushed out.
Pump
A
V
-Close the cocks (A) and (B) and re-open
the flow regulator (V) (so that the screw slot
is vertical).
bIf 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.
bFill the solar collector with water/glycol
Flow
regulator V
mix immediately after flushing it out,
because flushing water may remain
trapped in the circuit (with a consequent
risk of freezing).
position
CLOSED
Graduated
scale in
l/min.
PREMIXING WATER + GLYCOL
position
OPEN
Fig. 3.8
Anti-freeze
50%
40%
30%
Temperature
-32°C
-21°C
-13°C
Density
1,045 kg/dm3
1,037 kg/dm3
1,029 kg/dm3
Glycol anti-freeze is supplied separately 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.
bThe propylene glycol supplied is spe-
cially 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.
bDo NOT part fill the circuit with pure glycol then add water later.
bDo not use automatic or manual filling
systems.
bIf the water supply is highly chlorinated,
use distilled water to prepare the glycol/
water mix.
15
INSTALLATION MANUAL
16
3.9
Initial start-up
FILLING THE CIRCUIT
Step 1
Turn the knobs of the outlet valve (M) and
return valve (R) fully anticlockwise.
Close the flow regulator (V) (so that the screw
slot is horizontal).
Position of the knob
of the valve R - M
Flow stopped
Step 2
Open, if necessary, the manual bleed valve
at the highest point in the system and keep it
open throughout the filling operation.
Step 3
Pump the heat transfer fluid around the circuit
with an external filling pump until all air bubbles have been eliminated. Close, if it was
opened, the manual bleed valve at the highest point in the system.
Step 4
Temporarily raise the pressure in the system
to 4 bar.
90°
0°
90°
M
R
0°
Upward
flow only
(non-return
valve function)
Outlet
group
Return
group
Step 5
Start up the system for about 20 minutes.
B
Step 6
Repeat the air bleed operation from step 2
on until all residual air is eliminated from the
circuit.
Step 7
Set the pressure in the system to 3 bar.
Pump
Heat
transfer
fluid filling
pump
V
A
Step 8
Close the cocks (A) and (B) and re-open the
flow regulator (V).
Anti-freeze mix
Fig. 3.9
bbDo not fill the system in bright, sunny
conditions or if the collectors are hot.
3.10
Checks during and after initial start-up
Once the system has been started up, perform the following checks:
-- Check that the flow rate in the solar heating
circuit is equivalent to 30 l/h for each m2 of
collector area
Fig. 3.10
-- Check that the solar heating circuit has
been properly bled
17
Fig. 3.11
-- Check that the cold pressure of the system
is approximately 3 bar
-- Check that the safety valve operates at 6 bar
2
3
-- Check that all pipes in the water circuit have
been insulated in conformity to relevant
standards.
4
5
1
0
6
Fig. 3.12
Provided all the above checks have been
completed successfully, re-start the boiler
and the storage cylinder and check the
temperature settings and domestic hot water
draw rate.
Fig. 3.13
INSTALLATION MANUAL
3.11
Preparing for extended periods of disuse
If the solar storage cylinder is not going to be
used for an extended period of time, perform
the following operations:
- Drain the solar water circuit.
- Cover the solar collectors with suitable protection.
-Close the shut-off cocks for the domestic
hot water circuit.
- Shut down the boiler as instructed in its own
manual.
- Turn the system’s main power switch OFF.
Fig. 3.14
bbrain the domestic hot water (and central heating) circuit if there is any risk
of freezing.
Contact your local BERETTA Technical
Assistance Centre if you encounter any problems in completing the above procedure.
18
3.12
Maintenance
Scheduled maintenance is essential for the safety, efficiency and long working life of your solar
storage cylinder. Proper maintenance also reduces energy consumption and ensures reliability
over time. Have your storage cylinder serviced either by a BERETTA Technical Assistance
Centre or by a qualified professional at least once a year.
Perform the following operations before
beginning any maintenance:
-Switch the electricity supply to the storage
cylinder’s valve group and to any associated boiler OFF at the main switch and at
the control panel.
Fig. 3.15
-Close the shut-off cocks for the domestic
hot water circuit.
- Drain the cylinder’s secondary water circuit.
Replacing the pump
Fig. 3.16
Before starting work to replace the pump (C):
-- Switch the electricity supply to the storage
cylinder’s valve group and to any associated boiler OFF at the main switch and at
the control panel
Fig. 3.17
- Close the flow regulator (V).
M
Outlet
group
Return
group
R
- Turn the return valve knob 90° clockwise to
close the return valve (R).
-Unscrew the ring nuts H1 and H2 and
remove the pump (C).
H1
Reverse the above steps to fit the new pump.
C
H2
V
Fig. 3.18
19
INSTALLATION MANUAL
3.13
Cleaning and removing internal components
EXTERNAL CLEANING
Clean the outside of the storage cylinder
with a soft cloth damped in soapy water. To
remove stubborn marks, use a cloth damped
in a 50% mix of water and denatured alcohol
or a suitable cleaning product.
Dry the storage cylinder after cleaning it.
aDo not use abrasive products, petrol or
triethylene.
INTERNAL CLEANING
Removing and checking the magnesium
anode
-Remove the anode plug (1) and insulation
(2), and use a suitable wrench to unscrew
the anode holder (3).
- Check the magnesium anode for wear and
replace it if necessary.
1
2
3
Once cleaned, refit all components, following
the above steps in the reverse order.
20
NOTE:Tighten the anode plug to a torque of
25-30 Nxm.
Fig. 3.19
Cleaning inside the storage cylinder
- Remove the screws (4).
- Remove the flange cover (5).
- Remove the insulation (6).
- Unscrew the bolts (7) and remove the cover
(8) and seal (9).
-Clean inside the cylinder and remove any
residues through the access hole.
Once cleaned, refit all components, following
the above steps in the reverse order.
6
4
7
8
9
5
bTighten the bolts (7), proceeding diago-
nally around the flange to apply pressure uniformly around the seal.
-Fill the storage cylinder’s secondary circuit
and check that there are no leaks from any
of the seals.
-Check the performance of the storage cylinder.
Fig. 3.20
4 RECYCLING/DISPOSAL
4.1
Recycling/disposal
At the end of its useful life, the solar storage cylinder can be dismantled into its individual components (cylinder body, insulation and external casing) for disposal or recycling in an environmentally friendly manner.
5 TROUBLESHOOTING
PROBLEM
CAUSE
CORRECTIVE ACTION
Solar heating system
is inefficient
There is air in the circuit
Bleed the circuit
The flow rate is too low or too
high
Make sure that the flow rate
corresponds to about 30l/h per
m2.
Pressure is low
Check that the cold pressure
of the system is approximately
3 bar.
The solar controller needs
programming.
Make sure that the ∆T between
the collector and the storage
cylinder is not too high or too
low. Set a ∆T of 8-10°C.
There is lime scale or sludge in
the cylinder.
Check and clean as necessary.
The flow rate is too high.
Reduce pump speed and turn
the flow rate adjustment screw
on the valve group to set a flow
rate of 30l/h per m2 of collector
area.
Maximum temperature has
been exceeded in the collector
or in the storage cylinder
The solar controller has reached
maximum temperature and
stopped the pump. The pump
will start working again as soon
as the temperature drops in the
collectors.
There is no electrical power
Check the safety devices and
electrical connections.
The storage cylinder does not
reach the set temperature
The pump does not work,
even if the collector
probe detects a collector
temperature higher than that
in the storage cylinder
The temperature differential
is too great for the pump to
operate, or the controller is not
working.
The storage cylinder loses a
lot of heat overnight
There is natural circulation to
the collectors
Check the controller and the
temperature sensor, or reduce
the temperature differential
setting.
Make sure that the non-return
valve is sealed and closes
properly. Replace it if necessary
21
22
INSTALLATION MANUAL
Cod. 20026261
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.