Riello RBS 200 2S User manual

cod. 20116337 rev. 9 05/2022
RBS 200-300-430-550 2S RBS 800-1000 2S
RBS 2S
EN INSTALLATION, OPERATION AND MAINTENANCE MANUAL

2
GENERAL INFORMATION
This manual, Code 20116337 - Rev. 9 (05/2022)
comprises 12 pages.
GENERAL INFORMATION
RANGE
MODEL CODE
RBS 200 2S 20116675
RBS 300 2S 20116335
RBS 430 2S 20117339
RBS 550 2S 20116587
RBS 800 2S 20132268
RBS 1000 2S 20132269
ACCESSORIES
For a complete list of accessories and details of their compatibil-
ity, refer to the Catalogue.
Dear heating engineer,
We would like to congratulate you on having recommended a
Rsolar storage cylinder unit: a modern product that's ca-
pable of ensuring a high degree of reliability, efciency, quality
and safety.
While your technical skills and knowledge will certainly be more
than sufcient, this booklet contains all the information that
we have deemed necessary for the device's correct and easy in-
stallation.
Thank you again, and keep up the good work,
Riello S.p.A.
CONFORMITY
The Rsolar heaters comply with DIN 4753-3 and UNI EN 12897.
CONTENTS
ENGLISH
At the end of its life, the product should be
not be disposed of as solid urban waste, but
rather it should be handed over to a differen-
tiated waste collection centre.
The following symbols are used in this manual:
9 CAUTION! = Identies actions that require caution and ad-
equate preparation.
0 STOP! = Identies actions that you MUST NOT do.
1 GENERAL SAFETY INFORMATION
9 Check that the product is complete, undamaged and as or-
dered as soon as you receive it. Report any discrepancies or
damage to the Rdealer who sold it.
9 This product must be installed by a legally qualied heat-
ing engineer. On completion of the installation, the install-
er must issue the owner with a declaration of conformity
conrming that the installation has been completed to the
highest standards in compliance with the instructions pro-
vided by Rin this instruction manual, and that it con-
forms to all applicable laws and standards.
9 This product must only be used for the purpose for which it
is designed and made, as specied by R. Rdeclines
all responsibility, contractual or other, for damage to prop-
erty or injury to persons or animals caused by improper in-
stallation, adjustment, maintenance or use.
9 The product must be serviced at least once a year. Servicing
must be arranged in advance with the RTechnical Assis-
tance Service.
9 All servicing and repairs must be performed by a qualied
heating engineer.
9 If water leaks from the storage cylinder, turn off the water
supply and contact R’s Technical Assistance Service or a
qualied heating engineer immediately.
9 If the product is not going to be used for an extended peri-
od of time, contact the manufacturer’s Technical Assistance
Service to have at least the following operations performed:
−Close the shut-off cocks for the domestic hot water circuit
−Shut down the boiler connected to the storage cylinder
as instructed in its own manual
−Switch the storage cylinder OFF at the control panel (if
tted) and at the mains power switch
−Drain the central heating circuit and domestic hot water
circuit if there is any risk of freezing.
9 This instruction manual is an integral part of the product. It
must be kept safe and must ALWAYS accompany the product,
even if it is sold to another owner or transferred to another
user or to another installation. If you lose this manual, or-
der a replacement immediately. Keep the product purchase
documents to be presented to the Rauthorised Technical
Assistance Service to request a service call under warranty.
9 Size the solar expansion tank so as to ensure complete ab-
sorption of the expansion of the uid contained within the
system, with reference to the prevailing regulations on the
matter. In particular, consider uid characteristics, consid-
erable uctuation of service temperature and vapour that
might be generated during solar collector stagnation stage.
Proper size of expansion tank ensures setting off of all vol-
ume changes of the heat transfer uid, avoiding excessive
pressure increase. Limited pressure changes avoid reach-
ing safety valve opening pressure and the consequent uid
drainage.
Thismanual,Code
-Rev.
comprises
pages.
ENGLISH
Generalinformation
GENERAL INFORMATION
1 General Safety Information ......................2
2 Precautions..................................3
3 Description of the appliance .....................3
4 Identication ................................3
5 System layout ................................3
6 Technical specications.........................4
INSTALLATION
7 Unpacking the product .........................6
8 Assembly of the insulation and the lining (models
800 - 1000) ..................................6
9 Place of installation ...........................6
10 Water quality requirements......................6
11 Water connections ............................7
TECHNICAL ASSISTANCE SERVICE
12 Putting into service ............................8
13 Temporary shutdown ..........................8
14 Preparing for extended periods of disuse ...........8
15 Maintenance.................................9
16 Cleaning and removing internal components ........9
17 Recycling and disposal ........................ 10
END USER
18 Start-up ....................................11
19 Temporary shutdown ..........................11
20 Preparing for extended periods of disuse ...........11
21 External maintenance..........................11

3
GENERAL INFORMATION
GENERAL INFORMATION
2 PRECAUTIONS
The operation of any appliance that uses electrical power de-
mands that a number of fundamental safety precautions be re-
spected. In particular:
0 Never attempt to install the system without using suitable
personal protection equipment and without following all
applicable occupational safety standards.
0 Do not touch the product when barefoot or wet if it has any
electrical accessories installed in it.
0 Never clean or service the storage cylinder without rst
turning the mains power switch OFF to disconnect all elec-
trical accessories (if tted) from the mains electricity supply.
0 Never pull, disconnect, or twist any electrical cables coming
from the appliance even if it is disconnected from the mains
electricity supply.
0 Do not expose the storage cylinder to the elements. It is not
designed for use outdoors.
0 If solar plant pressure decreases, it is forbidden to top up
with only water as there is a danger of freezing and over-
heating.
0 Do not use connections or safety devices or ttings (expan-
sion vessels, pipes, insulation) that are not specically de-
signed and tested for use in solar water heating systems.
0 Do not allow children or inrm persons to operate the sys-
tem unsupervised.
0 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 com-
pliance with applicable legislation.
3 DESCRIPTION OF THE APPLIANCE
RRBS 2S double-coil solar heaters, available in six different
models, can be integrated in solar systems for the production of
domestic hot water.
RRBS 2S solar heaters can be equipped with a solar regulator
and can be easily used in solar systems where Rboilers or
heating groups serve as an integration.
The most important technical features of these solar storage cyl-
inders are:
−the accurate study of tank and coil geometry
−internal glazing, bacteriologically inert, to ensure the
maximum hygiene of treated water, reduce limescale
deposits and make cleaning operations easier
−insulation made of expanded polyurethane free from CFC
(chlorouorocarbons)
−a ange is provided for easy cleaning and maintenance
of the anti-corrosion magnesium anode.
4 IDENTIFICATION
The RRBS 2S solar heaters can be identied by:
Data plate
This lists the technical specications and performance of the
product.
Model
bar
W
l
W
kW
l/1'
BOLLITORE SOLARE
ModelloMatricola
Codice Anno
m2
m2
kW
m2
T067765IES
SOLARBOILER
Serial numb.
Code Year
Dispersioni secondo EN 12897
Heat loss according to EN 12897
V-Hz
Alimentazione elettrica
Power supply
Matricola
Serial number
Modello
Model
Potenza elettrica assorbita
Electrical consumption
Capacità del bollitore
Storage cylinder capacity
Press. esercizio max.
Maximum working pressure of storage cylinder
Superficie serpentino inferiore
Bottom coil heat exchange surface area
Superficie serp. inf.
Bottom coil heat exch.
Superficie serpentino superiore
Top coil heat exchange surface area
Produzione acqua calda sanitaria - serp. sup. [∆T 35°C]
Domestic hot water production – top coil [∆T 35°C]
Massima potenza assorbita sup. [T° Primario 80°C]
Power absorbed by top coil [T° primary 80°C]
Max pot. assorb. sup.
Power abs. by top coil
Collegamento di terra obbligatorio -
Connexión a tierra obligatoria
Obligatory ground connection
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
Modelo
Código
N° Fabric.
Año
Potencia absor bida max.se rp.sup. [T° Pri mári o 80°C]
Producción de agua caliente sanitaria - serp. sup. [∆T 35°C]
Superficie serpentín superior
Superficie serpentín inferior
Presión máxima de funcio namien to
Capacidad del in teracumula dor
Potencia eléctrica absorbida
Alimentación eléct rica
Dispersiones según EN 12897
N° Fabric.
Modelo
Pot. absor. max.serp.sup.
Sup. serpentín inf.
INTERACUMULADOR SOLAR
surf. area
Serial number plate
This species the serial number and model.
9 Technical data plate and Serial number plate are to be
applied (by the installer) after installation is complete.
9 If these plates or any other means of clearly identifying
the product are defaced, removed or lost, proper instal-
lation and servicing may be rendered difcult.
5 SYSTEM LAYOUT
1
P
M
6
5
4
2
3
UAC
EAF
SB
1 Storage cylinder
2 Top coil
3 Bottom coil
4 Flange for heater in-
spection
5 Insulation
6 Cover
PSocket
MGuide
UAC Domestic hot water
outlet
EAF Domestic cold water
inlet
SB Storage cylinder drain

4
GENERAL INFORMATION
GENERAL INFORMATION
6 TECHNICAL SPECIFICATIONS
DESCRIPTION RBS 2S
200 300 430 550 800 1000
Type of storage cylinder Vertical, glazed
Heat exchanger layout Vertical, with elliptical section
Storage cylinder capacity 208 301 430 551 731 883 l
Useful non-solar volume (Vbu)* 68 117 182 175 251 312 l
Solar usable volume (Vsol)** 140 184 260 376 480 570 l
Diameter of storage cylinder with insulation 604 604 755 755 1000 1000 mm
Diameter of storage cylinder without insulation ----790 790 mm
Height with insulation 1338 1838 1644 1988 1846 2171 mm
Height without insulation ----1745 2070 mm
Insulation thickness 50 50 50 50 100 100 mm
Total net weight 80 104 135 159 218 240 kg
Quantity/diameter/length of magnesium anode 1/33/450 1/33/450 1/33/520 1/33/520 1/40/600 1/40/600 mm
Flange internal diameter 130 130 130 130 130 130 mm
Diameter/length of sensor sockets 16/180 16/180 16/180 16/180 16/180 16/180 mm
Top coil water capacity 3,5 4,0 5,0 5,0 8,0 8,0 l
Top coil heat exchange surface area 0,7 0,8 1,0 1,0 1,6 1,6 m2
Bottom coil water capacity 3,5 5,0 7,0 9,0 11,5 13,5 l
Bottom coil heat exchange surface area 0,7 1,0 1,4 1,8 2,3 2,7 m2
Maximum operating pressure of storage cylinder 10 7bar
Maximum operating pressure of coils 10 7bar
Maximum operating temperature 99 °C
Discharges according to EN 12897:2006 ∆T=45 °C (am-
bient 20°C and storage at 65°C) 62 69 75 85 94 101 W
Discharges according to UNI 11300 1,38 1,53 1,67 1,89 2,09 2,24 W/K
Energy class BBBBBB
PERFORMANCE RELATING TO INTEGRATION COIL
Upper coil continuous efciency (ACS 10-45°C) (Vbu reference volume)
Upper coil delivery temperature
80°C ∆T 20°C 16,1 23 31,4 31,4 50 50 kW
400 572 774 774 1240 1240 l/h
70°C ∆T 20°C 10,3 17 20,7 20,7 38 38 kW
247 425 505 505 930 930 l/h
60°C ∆T 20°C 6,5 11 15,5 15,5 25 25 kW
160 277 375 375 620 620 l/h
50°C ∆T 20°C 2,4 5 7 7 15 15 kW
57 130 170 170 380 380 l/h
Set-up time required to heat the heater to 60°C, referred to the integration coil probe, to the different upper coil inlet tem-
peratures with a coil outlet/inlet delta (∆) of 20°C (Vbu reference volume)
Upper coil delivery temperature
80°C ∆T 20°C 25 27 24 24 26 28 min
70°C ∆T 20°C 33 34 32 32 34 40 min
60°C ∆T 20°C 66 65 65 65 65 67 min
NL thermal efciency coefcient according to DIN 4708. The NL index, referred to the integration exchanger, indicates a num-
ber of apartments having 3.5 people that can be fully supplied, with a 140 l bathtub and two other drawing points.
Upper coil delivery temperature
80°C 1,12 1,64 2,2 2,23 3,63 3,79
70°C 0,86 1,34 1,66 1,69 2,88 3,19
60°C 0,65 1,04 1,37 1,42 2,17 2,47
Vbu (*) The non-solar usable volume indicates the quantity of water (in litres) heated directly by the thermal integration coil. It
is calculated as the volume between the upper part of the heater and the lower part of the thermal integration element
(integration coil lower turn).
Vsol (**) The usable solar volume indicates the quantity of water (in litres) heated directly by the solar coil (placed in the lower
part of the heater) minus the non-solar volume (Vbu).

5
GENERAL INFORMATION
GENERAL INFORMATION
EMPTYING IN 10’ RBS 2S
200 300 430 550 800 1000
PERFORMANCE RELATING TO INTEGRATION COIL
Quantity of domestic water obtained in 10’ with heater pre-heated to 60°C (*) and primary exchanger at the indicated deliv-
ery temperature, considering an increase of the domestic water temperature of 30°C between inlet and outlet (according to
EN 12897).
Upper coil delivery temperature
80°C 166 260 330 345 595 673 l
70°C 138 255 323 340 513 666 l
60°C 131 250 308 336 473 626 l
PERFORMANCE RELATING TO SOLAR COIL
Quantity of domestic water obtained in 10’ with heater pre-heated to the indicated temperature (**) considering an increase
of the domestic water temperature of 30°C between inlet and outlet (according to EN 12897).
Temperature of accumulation tank lower part
70°C 374 438 659 863 1190 1530 l
60°C 284 375 531 675 877 1110 l
50°C 205 310 390 485 762 790 l
(*) Integration coil probe point reference, Vbu reference volume.
(**) Solar coil probe reference.
Pressure drops
TOP COIL
PRESSURE DROP (mbar)
400
300
200
500
600
100
0
0 1000 2000 3000 4000
300
200
430
550
800
1000
FLOW RATE (l/h)
Pressure drops
BOTTOM COIL
PRESSURE DROP (mbar)
120
80
40
140
160
100
60
20
0
0 400 600 800 1000200 1200
15
10
5
0
0 400200 300 500100
800
550
430
200
300
1000
200
430
300
800 5501000
FLOW RATE (l/h)
Values referred to a mix of water and 30% glycol.

6
INSTALLATION
INSTALLATION
7 UNPACKING THE PRODUCT
RRBS 2S solar heaters are supplied in a single package on a
wooden pallet.
The insulation and the lining components of the models 800
and 1000 are supplied separately from the structural work and
are to be assembled upon receiving the product as described
in the paragraph "Assembly of the insulation and the lining
(models 800 - 1000)". For these models the magnesium anode
is supplied in a cardboard box.
The following items are delivered in a plastic bag inside the
packaging:
−Instruction manual
−Bar code label
−Hydraulic test certicate
−Energy label (to be applied to device upon installation)
−No. 4 adjustable feet to be mounted during installation
(for models 800 - 1000 only).
9 The instruction manual is an integral part of the solar stor-
age cylinder. Once located, read it thoroughly and keep it
safe.
9 For handling operations, thoroughly follow the instructions
on device package label.
8 ASSEMBLY OF THE INSULATION AND THE LINING
(MODELS 800 - 1000)
The assembly of the insulation and lining components must be
performed at the site of installation to facilitate passage through
any doors and/or entries to the room.
4
5
2
1
7
3
3
1
6
1
3
L
3
L
Proceed as follows:
−Fit the magnesium anode (6) with its seal in the sleeve
and x it in place
−Assemble the insulating covers (1) around the body of
the heater, making sure that the engagement points on
the edges are positioned correctly. The edges are not re-
quired to be closed completely
−Place the front protection plate (3) correctly on the at-
tachments
−Place the washers on the attachments and the protec-
tion for the inspection ange (4)
−Place the rear protection plate by closing the interlock-
ing aps (L) without closing completely (leave one tooth
open)
−Apply the upper insulation (2) and the upper cover (5) (in
order to insert the cover, exert a light and homogeneous
pressure)
−Close the interlocking aps (L) completely, which were
previously left with an open tooth
−Fit the cover of the inspection ange using the two
self-tapping screws (7) provided
−Apply the technical data plate and serial number plate.
If disassembling is required, proceed in reverse order.
9 Wear suitable personal protective equipment and use suit-
able safety devices.
9 PLACE OF INSTALLATION
RRBS 2S solar heaters can be installed in all rooms not re-
quiring a level of electrical protection of the device greater than
IP X0D.
≥ 0,3 m
≥ 0,3 m
≥ 0,3 m
≥ 0,6 m
≥ 0,7 m
NOTE: the above-indicated dimensions are recommended for a
correct maintenance and access to the device.
9.1 Installation in older systems and systems
requiring modernisation
When installing RRBS 2S storage cylinders in old systems or
systems requiring modernisation, always perform the following
checks.
−Make sure that the system is tted with safety and con-
trol devices in accordance with applicable legislation and
standards
−Make sure that the central heating circuit has been
ushed out to remove all sludge and lime scale, and has
been vented and seal tested
−Make sure that a suitable water treatment system is in-
stalled if the quality of the supply/recirculation water so
demands (refer to the reference values listed in the table
alongside).
10 WATER QUALITY REQUIREMENTS
REFERENCE VALUES
pH 6-8
Electrical conductivity less than 200 μS/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 35°F
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm
The values above ensure proper operation of the system. Refer
to the limit values specied in the current standards and regu-
lations on the installation site.
Installation

7
INSTALLATION
INSTALLATION
11 WATER CONNECTIONS
N
A
B
C
D
O
E
F
P
G
H
I
L
M
AD
RBS 1000
AD
RBS 800
RBS 800 - 1000 2S
UAC
MC
Psc
RL
RC
M
Psr
R
EAF
DF
AD
N
A
B
C
D
E
F
G
H
I
L
M
DF
RBS 200 - 550 2S
UAC
MC
RL
RC
M
Psr
R
EAF
Psc
RBS 200
Psc
RBS 300 - 430 - 550
DESCRIPTION RBS 2S
200 300 430 550 800 1000
UAC Domestic hot water outlet 1” M 1"1/4 M Ø
MC Outlet from boiler 1” M 1” M Ø
RC Return to boiler 1” M 1” M Ø
M Outlet from solar collector 1” M 1” M Ø
R Return to solar collector 1” M 1” M Ø
RL DHW recirculation 1” M 1” M Ø
EAF Domestic cold water inlet 1” M 1"1/4 M Ø
Psc Diameter/length of boiler sensor socket 16/180 16/180 mm
Psr Diameter/length of solar controller sensor socket 16/180 16/180 mm
AD Quantity/diameter/length of magnesium anode 1/33/450 1/33/450 1/33/520 1/33/520 1/40/600 1/40/600 mm
DF Flange internal diameter 130 130 130 130 130 130 mm
A171 171 208 207 75 75 mm
B243 253 329 348 289 289 mm
C403 393 427 443 428 421 mm
D598 693 684 788 799 834 mm
E738 903 824 1088 969 1006 mm
F878 1113 964 1328 1144 1337 mm
G953 1233 1064 1428 1234 1426 mm
H - 1323 1174 1538 1321 1506 mm
I1098 1438 1289 1653 1444 1637 mm
L1170 1670 1440 1784 1707 2032 mm
M1338 1838 1644 1988 1846 2171 mm
NØ 604 Ø 604 Ø 755 Ø 755 Ø 1000 Ø 1000 mm
O ----555 -mm
P -----1237 mm
9 It is recommended to install shut-off valves at domestic water inlet and outlet.
9 Check the efciency of the seals when lling/relling the storage cylinder.
9 In case of a probe, any electric junction between probe cable and extensions for the connection to the electric panel must be
soldered and protected with a sheath or a suitable electric insulation.
9 Install the magnesium anode supplied (for the models 800 and 1000).

8
TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
12 PUTTING INTO SERVICE
It is essential to perform the following checks before starting up
or testing the functioning of the storage cylinder. In particular,
check that:
−The supply cocks in the domestic water circuit are all open
−The water connections to the boiler and solar collectors
have been made correctly
−All the pipes in the water circuit have been insulated in
conformity to relevant standards
−The solar collector circuit has been correctly ushed out
and lled with water-glycol mix, and all air has been
bled out of the circuit (see the manual for the solar col-
lectors)
−Start up the boiler (if installed) as instructed in its own
manual.
−Put the solar collectors into service. See the manuals for
the solar collectors and associated accessories.
Once the system has been started up, perform the following
checks.
−Make sure that all pumps are free and rotate in the right
direction
−Make sure that all circuits have been bled.
−Make sure that the boiler and solar collectors connect-
ed to the system shut down correctly when their mains
power switches are turned OFF.
Provided the above checks have been completed satisfactorily,
restart the system and verify its performance.
13 TEMPORARY SHUTDOWN
If you are going away for a short period of time like a weekend
or a short holiday, etc., and outdoor temperatures are going to
remain above ZERO, proceed as follows.
−Adjust the storage cylinder thermostat to its minimum
setting.
9 If the temperature to which the heater is exposed can fall
below 0°C (frost hazard), perform the operations described
in paragraph "Preparing for extended periods of disuse".
14 PREPARING FOR EXTENDED PERIODS OF DISUSE
If the storage cylinder is not going to be used for an extended
period of time, perform the following operations:
−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
−Close the shut-off cocks for the domestic hot water cir-
cuit.
9 Drain the central heating circuit and domestic hot water cir-
cuit if there is any risk of freezing.
TechnicalAssistanceService

9
TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
15 MAINTENANCE
Scheduled maintenance is essential for the safety, efciency and
long working life of your storage cylinder. Proper maintenance
also reduces energy consumption and ensures reliability over
time. Have your storage cylinder serviced either by the manu-
facturer’s Technical Assistance Service or by a qualied heating
engineer at least once a year.
Perform the following operations before beginning any main-
tenance:
−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
−Close the shut-off cocks for the domestic hot water circuit
−Drain the storage cylinder’s DHW (secondary) water cir-
cuit.
16 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 suit-
able cleaning product. Dry the storage cylinder after cleaning it.
0 Do not use abrasive products, petrol or triethylene.
INTERNAL CLEANING
Removing and checking the rst magnesium anode
If the magnesium anode is tted in the top of the storage cylin-
der, remove the cover (1) and insulation (2), and use a suitable
wrench to unscrew the anode holder (3).
If the magnesium anode is tted in position (A), remove the
cover (4) and use a suitable wrench to unscrew the anode hold-
er (3).
Check the magnesium anode for wear and replace it if neces-
sary.
On completion of cleaning, follow the above steps in the reverse
order to ret all removed parts.
NOTE: Tighten the anode plug to a torque of 25-30 Nm.
1
2
3
A
3
4
Cleaning inside the storage cylinder
−Remove the screws (4)
−Remove the ange cover (5)
−Remove the insulation (6)
−Unscrew the bolts (7) and remove the cover (8)
−Remove the seal (9)
−Clean inside the storage cylinder and remove any resi-
dues through the access hole.
9
8
7
6
5
4
9 Check the seal for wear and replace it if necessary.
On completion of cleaning, follow the above steps in the reverse
order to ret all removed parts.
9 Tighten the bolts (7), proceeding diagonally around the
ange to apply pressure uniformly around the seal.
−Fill the storage cylinder’s DHW (secondary circuit) and
check that there are no leaks from any of the seals
−Check the performance of the storage cylinder.

10
TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
16.1 Troubleshooting
SUPPLEMENTARY HEATING CIRCUIT
FAULT CAUSE SOLUTION
The storage cylinder functions incorrectly
or irregularly
Flow rate too high
−Fit a pressure limiter
−Fit a ow reducer
There are blockages or deposits in the
domestic hot water circuit −Check and clean as necessary
Filling pump −Check the pump
The water temperature from the boiler is
too low −Check the setting
There is air in the primary circuit −Bleed the circuit
SOLAR COLLECTOR CIRCUIT
FAULT CAUSE SOLUTION
The storage cylinder functions incorrectly
or irregularly
There is air in the circuit −Bleed the circuit
The ow rate is too low or too high −Check the ow rate of the collector
circuit
Pressure is too low −Check that circuit pressure is approxi-
mately 3 bar when cold
There is lime scale or sludge in the
cylinder −Check and clean as necessary
The storage cylinder loses a lot of heat
overnight
There is natural circulation to the
collectors
−Make sure that the non-return valve is
efcient and closes properly. Replace if
necessary
17 RECYCLING AND DISPOSAL
The device is primarily composed of:
Material Component
steel structural work
PU (polyurethane) insulation (models 200 - 550)
polystyrene - polyester felt insulation (models 800 - 1000)
PE (polyethylene) water connection washers
ABS (acrylonitrile-butadiene-styrene) lining and covers
At the end of the device's useful life, these components must be separated and disposed of according to current regulations in the
country of installation.

11
END USER
END USER
END USER INSTRUCTIONS
Refer to the GENERAL SAFETY INFORMATION and PRECAUTIONS section for safety-related information.
18 START-UP
The heater commissioning must be performed by Technical As-
sistance Service personnel.
Under certain circumstances, such as after long periods of dis-
use, the user may need to re-start it without involving the Tech-
nical Assistance Service. Before doing so, perform the following
checks and operations.
−Check that the supply cocks in the domestic water circuit
are all open
−Switch the electricity supply ON at the mains power
switch and at control panel switch (if tted).
19 TEMPORARY SHUTDOWN
To reduce to the environmental impact and save energy, in case
of brief absences, week-ends, short trips, etc., and with exter-
nal temperatures above 0°C, set the heater temperature control,
where available, to the minimum value.
9 If the temperature to which the heater is exposed can fall
below 0°C (frost hazard), perform the operations described
in paragraph "Preparing for extended periods of disuse".
20 PREPARING FOR EXTENDED PERIODS OF DISUSE
If the storage cylinder is not going to be used for an extended
period of time, ask the manufacturer’s Technical Assistance Ser-
vice to make the system safe.
21 EXTERNAL MAINTENANCE
Clean the outside of the storage cylinder with a soft cloth
damped in soapy water.
0 Do not use abrasive products, petrol or triethylene.
Enduser

RIELLO S.p.A.
Via Ing. Pilade Riello, 7
37045 - Legnago (VR)
www.riello.com
The manufacturer strives to continuously improve all products. Appearance, dimensions, technical specications, standard equipment
and accessories are therefore liable to modication without notice.