Riello CSAL25 R 200 N REG User guide

cod. 20094885 rev. 0 03/2015
CSAL25 R N REG
EN INSTALLER, TECHNICAL ASSISTANCE SERVICE AND USER MANUAL

2
Dear Customer,
Thank you for choosing a Rforced circulation system. 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 your Rforced circulation
system to be serviced regularly by an authorised Rservice centre. Their personnel are specially trained to keep your forced circu-
lation system efcient and cheap to run. Rservice centres also stock any original spare parts that might be required.
This manual contains important instructions and precautions that must be observed to ensure the trouble-free installation and
efcient functioning of your Rforced circulation system.
Please accept our renewed thanks for your purchase.
Riello S.p.A.
CONFORMITY
Rstorage cylinders conform to DIN 4753-3 and UNI EN 12897 standards.
The solar collectors used in Rforced circulation systems conform to to EN standard 12975.
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 property or injury to persons or animals caused by improper installation,
adjustment, maintenance or use.
RANGE
MODEL CODE
CSAL25 R 200 N REG 20094967
CSAL25 R 300 N REG 20094968
CSAL25 R 430 N REG 20094969
CSAL25 R 550 N REG 20094970
ACCESSORIES
For a complete list of accessories and details of their compatibility, refer to the Catalogue.

3
This manual, Code 20094885 - Rev. 0 (03/2015)
comprises 28 pages.
CONTENTS
The following symbols are used in this manual:
9 CAUTION! = Identies actions that require caution and
adequate preparation.
0 STOP! = Identies actions that you MUST NOT do.
This manual, Code
- Rev.
comprises
pages.
ENGLISH
GENERAL ..............................................4
1 GENERAL SAfEty INfoRmAtIoN ...................4
2 PREcAutIoNS......................................4
3 DEScRIPtIoN of thE APPLIANcE ..................5
4 IDENtIfIcAtIoN ....................................5
5 comPoNENtS......................................6
6 DEScRIPtIoN of SyStEm comPoNENtS ...........7
6.1 CSAL 25 RS solar collector........................7
6.1.1 System layout ................................7
6.1.2 Technical specications.........................7
6.1.3 Connections .................................9
6.2 Manual bleed valve (available as an accessory) ...... 10
6.3 7200/2 PLUS solar storage cylinder................ 10
6.3.1 System layout ................................11
6.3.2 Technical specications........................ 12
6.3.3 Storage cylinder water circuit ................... 13
6.3.4 Overall dimensions and water ttings............. 14
6.4 Pump ..................................... 16
6.5 Thermostatic mixer valve........................17
6.6 SUN 2 PLUS 2R solar controller . . . . . . . . . . . . . . . . . . . .17
7 tyPIcAL SyStEm SchEmAtIc .....................18
INStALLER ............................................19
8 uNPAckING thE PRoDuct . . . . . . . . . . . . . . . . . . . . . . . . 19
9 INStALLAtIoN of SyStEm comPoNENtS..........20
9.1 Installation .................................20
9.2 Fitting the valve group ........................ 21
10 PREPARING foR INItIAL StARtuP .................22
tEchNIcAL ASSIStANcE SERVIcE.....................23
11 INItIAL StARtuP...................................23
12 chEckS DuRING AND AftER INItIAL StARt-uP ....24
13 tEmPoRARy ShutDowN ..........................25
14 PREPARING foR ExtENDED PERIoDS of DISuSE ..25
15 mAINtENANcE ....................................25
16 cLEANING AND REmoVING INtERNAL
comPoNENtS.....................................26
17 REcycLING AND DISPoSAL........................26
18 tRoubLEShootING...............................27

4
GENERAL
GENERAL
1 GENERAL SAFETY INFORMATION
9 Check that the product is complete, undamaged and as
ordered 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
provided by Rin this instruction manual, and that it
conforms 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
installation, adjustment, maintenance or use.
9 Make sure that the roof is strong enough to support the
weight of the solar water heating system under operating
conditions. Also make sure that the section of roof chosen
for the installation enjoys a high level of insolation, and
is not shaded during the day by tall plants, trees, other
houses, hills, etc..
9 The installation of a solar water heating system modies
the existing structure of the roof. Verify the suitability of all
roof elements and if necessary adapt them to avoid leaks
or damage by wind and/or snow loads.
9 If the system is installed in an area subject to gusting
winds or snow loads in excess of the limits given in the
technical specications, consult your supplier for advice.
9 Snow can build up in the sheltered area behind the so-
lar water heating system. Provide adequate protection to
avoid increasing the static load on the roof.
9 The system must be serviced at least once a year. Servicing
must be arranged in advance with the RTechnical As-
sistance Service.
9 All servicing and repairs must be performed by a qualied
heating engineer.
9 The water supply circuit must permit the storage cylinder
to be lled and emptied in safety. Shut-off valves must
therefore be easily accessible to the user and the opera-
tion of emptying the storage cylinder must not create any
risk of ooding or other damage.
9 Insulate the domestic water pipes (hot and cold) and the
pipes of the solar collector circuit. Provide suitable insula-
tion for all outdoor accessories.
9 The point through which the water pipes enter the build-
ing must be rain-proof and damp-proof.
9 If you notice any water or heat transfer liquid leaks, dis-
connect the system immediately from the mains electricity
supply (if a supplementary heating element is installed),
shut off the water supply, and notify R’s Technical As-
sistance Service or a qualied heating engineer immedi-
ately.
9 Make sure that the water-glycol mix in the solar collector
circuit is able to resist the minimum temperatures likely to
occur in the place of installation.
9 The system can reach very high temperatures. Safety valves
can therefore discharge extremely hot liquids. Make sure
that the expansion vessel is of a suitable size and design
for use in solar water heating systems.
9 Use proper slings to lift and move the elements of the
system. Never lift the collector or storage cylinder by their
ttings. Avoid subjecting the collector to impacts or me-
chanical strain, and take care to protect the glass panel.
Use the personal protection equipment required by appli-
cable safety standards.
9 This instruction manual is an integral part of the prod-
uct. 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, order a replacement immediately.
2 PRECAUTIONS
0 Never attempt to install the system without using the per-
sonal protection equipment and without following the
safety precautions specied by applicable occupational
safety standards.
0 Never install solar collectors on roofs without an adequate
lightning protection system.
0 Never install the system without providing proper drain-
age for the two safety valves: that of the domestic hot wa-
ter circuit and that of the primary (solar collector) circuit.
0 Never pull, disconnect, or twist the electrical cables com-
ing from the appliance even if it is disconnected from the
mains electricity supply.
0 Do not allow children or inrm persons to operate the sys-
tem unsupervised.
0 Never clean or service the storage cylinder without rst
turning the mains power switch OFF to disconnect all
electrical accessories (if tted) from the mains electricity
supply.
0 Do not expose the storage cylinder to the elements. It is
not designed for use outdoors.
0 Do not tamper with or adjust the safety or control devic-
es without prior authorisation and instructions from the
manufacturer.
0 Never use anti-freeze other than that supplied by R
to ll or top up the solar collector circuit. Mixing different
products can reduce the anti-freeze protection provided.
General

5
GENERAL
GENERAL
0 Never drain the solar collector circuit under sunny condi-
tions or when the collector is hot.
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
The RCSAL25 R N REG system is a forced circulation system for
producing domestic hot water in single homes.
It comes with all the parts necessary for a complete installation,
including all the accessories required for a quick start-up:
−solar collectors
−ttings for the solar storage cylinder
−return valve group with ow regulator and safety system
complete with safety valve and expansion vessel
−anti-freeze for mixing with water
−thermostatic mixer valve
−solar storage cylinder
−solar controller pre-mounted on valve group
The roof mounting system and the manual bleed valve for in-
stallation at the highest point in the circuit to ensure quick and
easy bleeding are available as separate accessories from the
RCatalogue.
The differential solar controller can control the entire system in-
cluding any Rboilers or hot water generators used as auxil-
iary heat sources.
4 IDENTIFICATION
The solar collectors are identied by:
CODICE : 20075475
DESCRIZIONE : CP25TVS
S/N :
COLLETTORE SOLARE PIANO
DIMENSIONI: 2003X1148X85 mm
SUPERFICIE LORDA: 2,30 m
2
TEMPERATURA DI STAGNAZIONE: 197°C
SUPERFICIE DI APERTURA: 2,16 m
2
CONTENUTO LIQUIDO: 1,6 l
SUPERFICIE ASSORBITORE: 2,15 m
2
PESO A VUOTO: 40 kg LIQUIDO TERMOVETTORE:
ACQUA+GLICOLE PROPILENICO
MAX CONCENTRAZIONE GLICOLE: 50%
MAX PRESSIONE ESERCIZIO: 10 bar
FABBRICATO IN ITALIA
da Riello S.p.A.
20075507_E2
EN 12975
13000000
Anno di produzione
SERIALE PROGRESSIVO
Certif. 011-7S2399F
Year of production
Data plate
The storage cylinders themselves and the complete system are
identied by:
Data plate
The RCSAL25 R N REG solar water heating system is identi-
ed by system data plates marked with the code, description
and serial number of the product.
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
BALLON SOLAIRE
Modele Fabrication
Code Année
Pression service max.
Alimentat. élect.
bar
V-Hz
Capacité ballon
l
T067594IF02
Collegamento di terra obbligatorio - Raccordement a la terre obligatoire
W
Puissance élect. absorbée
Puissance absorbée serpentin sup.[T° Primaire 80°C]
kW
l/1'
BOLLITORE SOLARE
Modello Matricola
Codice Anno
Massima potenza assorbita sup.[T° Primario 80°C]
Press. esercizio max.
Capacità del bollitore
Potenza elettric assorbita
Alimentazione elettrica
Débit specifique sup. [ 35°C]
Portata specifica sup.[ 35°C]
∆T
∆T
m
2
m
2
Superficie serpentino superiore
Surface serpentin supérieur
Superficie serpentino inferiore
Surface serpentin inférieur
Cod.
Mod.
N°
T06770901GE
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
SISTEMA - SYSTEME - SYSTEM - SYSTEEM
Cod.
Mod.
N°
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
These plates also list the storage cylinder’s technical speci-
cations and performance.
They are supplied in the documentation envelope delivered
with the system and must be applied to the solar storage
cylinder on completion of installation.
9 If these plates or any other means of clearly identifying the
product are defaced, removed or lost, proper installation
and servicing may be rendered difcult.

6
GENERAL
GENERAL
5 COMPONENTS
TO SAFETY DRAIN
3
9
8
12
15
11
10
13
14
RM
2
1 1
4
5
6
18-24l
35l 7
LEGEND:
1 RCSAL 25 RS solar collector
2 Manual bleed valve (accessory)
3 R7200/2 PLUS solar storage cylinder
4 Pressure gauge
5 SUN 2 PLUS 2R solar controller
6 Safety valve (6 bar)
7 Expansion vessel
8 Sensor/power cable entrance
9 Cock B
10 Flow meter (l/min)
11 Flow regulator
12 Cock A
13 Pump
14 Return temperature gauge
15 Valve R
M Collector outlet
R Collector return

7
GENERAL
GENERAL
6 DESCRIPTION OF SYSTEM COMPONENTS
6.1 CSAL 25 RS solar collector
6.1.1 System layout
Direction of flow of
heat transfer liquid
Connector Ø 22 mm
Glass 3,2 mm
Connection
ring nut, 1"
85
Collector
outlet
Collector
return
Ventilation holes
Collector
probe socket
1195
1144
2003
46,5
6.1.2 Technical specications
DESCRIPTION
Total area 2,30 m2
Exposed area 2,16 m2
Effective absorption area 2,15 m2
Connections (M) - (F) 1" mm
Empty weight 40,0 kg
Liquid content 1,6 l
Recommended ow rate for each line per m2of collector 30 l/(h x m2)
Minimum ow rate for each line per m2of collector 12 l/(h x m2)
Maximum ow rate for each line per m2of collector 60 l/(h x m2)
Glass thickness 3,2 mm
Thickness of rock wool insulation 40 mm
Absorption (α)95 %
Emissions (ε) 4 %
Maximum permitted pressure 10 bar
Stagnation temperature 197 °C
Maximum number of collectors in a line 6n°

8
GENERAL
GENERAL
Efciency curve
0,75
0,80
0,65
0,70
0,55
0,60
0,45
0,50
0,40
0,35
0 0,01 0,02 0,03 0,04 0,05 0,06 0,07 0,08
Tm[m
2
K/W]
*
Description U/M
Optical efciency (ηο) (*) 0,784 -
Thermal dispersion factor (a1) (*) 4.08 W/(m2K)
Thermal dispersion temperature de-
pendence factor (a2) (*)
0,0084 W/(m2K2)
IAM (50°) (*) 0,96 -
Efciency (ηcol) (**) 61 %
(*) Value referred to exposed area. Tested according to EN
12975, referred to a 33.3% water-glycol mix, ow rate of
160 l/h, and irradiation G = 800W/m2.
Tm = (Coll._inlet _temp.+Coll._outlet_temp.)/2
T*m = (Tm-T_ambient)/G
(**) Calculated with a temperature difference of 40K between
the solar collector and the surrounding air, and with total
solar radiation of 1000 W/m2referred to the exposed area.
WIND AND SNOW LOADS ON COLLECTORS
Installation height
above ground Wind speed
Mass in kg to secure collector against
lifting by wind
Load on roof from wind, snow, and
collector weight
At angle of 45°At angle of 20°At angle of 45°At angle of 20°
0 - 8 m 100 km/h 80 kg 40 kg 320 kg 345 kg
8 - 20 m 130 km/h 180 kg 90 kg 470 kg 430 kg
20 - 100 m 150 km/h 280 kg 150 kg 624 kg 525 kg
Maximum permitted load from wind and snow (including combined loads) on surface of collector: 1500 Pa (175 km/h).
Pressure drop in solar collectors (*)
30
25
20
15
10
5
0
0 50 100 150 200 250 300
350
Pressure drop (mbar)
Flow rate (l/h)
(*) With antifreeze-water mix of 33,3% / 66,7% and heat transfer medium temperature = 20°C.

9
GENERAL
GENERAL
6.1.3 Connections
ring nut
seal ring
male union
sensor pocket
seal ring
toward the
heat transfer
circuit
When tightening a fitting,
HOLD THE OPPOSITE
FITTING STEADY WITH
A SECOND TOOL
to avoid damage
seal ring
from the
heat transfer circuit
captive nut
Collectors in the same line must be connected so that the heat transfer uid ows through them in series. The pipe to the heat
exchanger in the storage cylinder must be connected to the outlet with the temperature sensor socket on the last collector in the
line (see gure).
Lines of solar collectors can be connected either in series (provided each line contains no more than 6 collectors) or in parallel. The
complete circuit must always be hydraulically balanced. See the following sample layouts.
Two lines in series Two lines in parallel
T T
Diameter of connection pipes for a specic ow rate of 30 lt/m2h
Total surface area (m2)2 - 4 6 - 12 14 - 20
Diameter of copper pipe (mm) 10 - 12 14 18
Diameter of steel pipe (inch) 3/8" - 1/2" 1/2" 3/4"
9 If copper pipes are used, joints must be hot brazed.
9 We recommend the use of stainless steel pipes specially
made for solar collectors for the outlet, return and probe
pipes. The probe cable should be of the shielded type.
9 Do not use plastic or multistrate pipes. Operating tempera-
ture can exceed 180°C.
9 Pipe lagging must be able to resist high temperatures
(180°C).

10
GENERAL
GENERAL
6.2 Manual bleed valve (available as an accessory)
The manual bleed valve is designed to bleed air quickly from the
system, and must be installed together with the brazed unions
on the collector outlet pipe at the highest point in the circuit.
9 Make sure that you close the manual bleed valve after all air
has been bled from the circuit.
Refer to the instructions provided with the bleed valve for de-
tails on how to install it.
9 The manual bleed valve is not necessary if an automatic ll-
ing pump is available.
Checking the heat transfer liquid
Check the anti-freeze effect and the pH level of the heat transfer
liquid every 2 years.
−Use an instrument like a refractometer or densimeter to
check the anti-freeze effect (which must have a nomi-
nal protection value of approx. -30°C). If the protection
threshold is higher than -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 heat
transfer liquid.
6.3 7200/2 PLUS solar storage cylinder
R7200/2 PLUS solar storage cylinders are double coil units
designed for installation in domestic hot water production sys-
tems heated by solar collectors. They are available in four mod-
els from 200 to 550.
The most important technical features of these solar storage cyl-
inders are:
−The cylinder and coils are specially designed and shaped
for optimum performance in terms of stratication, heat
exchange and replenishment times.
−the double vitried cylinder lining is bacteriologically in-
ert for maximum hygiene, reduced lime scale deposits
and easy cleaning
−CFC-free polyurethane insulation and an elegant external
casing reduce heat loss.
−temperature sensor and power cables are all internally
routed
−a ange is provided for easy cleaning and maintenance
of the anti-corrosion magnesium anode.