Riello CSV 25 R User manual

cod. 20024195 rev. 9 10/2018
CSV 25-35 R
EN INSTALLATION INSTRUCTIONS

2
This manual, Code 20024195 - Rev. 9 (10/2018)
comprises 16 pages.
CONFORMITY
Solar collectors conform to EN 12975 standard and to Solar Keymark certication standard.
Range
MODEL CODE
CSV 25 R 20023353
Kit of 5 collectors CSV 25 R 20023354
CSV 35 R 20023416
Kit of 5 collectors CSV 35 R 20023417
RANGE
Contents
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.
Thismanual,Code
-Rev.
comprises
pages.
GENERAL INFORMATION ...............................3
1 System layout ................................3
2 Identication ................................4
3 Technical specications.........................5
4 Connections .................................7
5 Water circuit .................................8
INSTALLATION.........................................10
6 Unpacking the product ........................ 10
7 Handling................................... 10
8 Installation ..................................11
9 Filling the circuit ............................. 12
10 Checks .................................... 13
COMMISSIONING AND MAINTENANCE ..................14
11 Maintenance................................ 14

3
GENERAL INFORMATION
System layout
1 SYSTEM LAYOUT
Collector
probe socket
P1
H3
Collector
return Collector outlet
P2
H2
L1
L2
H1
L3
Seal
Insulation
Bottom pipe
Glass
Vacuum
Absorbent
coating
Collector
foot
Support frame
Direction of flow
Evacuated
tube
Aluminium absorber
Top
cover plat
Top pipe
Reflective
mirror
Description H1 H2 H3 L1 L2 L3 P1 P2 U/M
CSV 25 R 1730 65 1700 1600 1552 110X14 68 145 mm
CSV 35 R 2260 2212 110X20 mm
Generalinformation

4
GENERAL INFORMATION
Identication
CODICE : 20025360
FABBRICATO IN ITALIA
DESCRIZIONE : CTE25V
S/N :
COLLETTORE SOLARE SOTTOVUOTO
DIMENSIONI: 1600X1730X145 mm
SUPERFICIE LORDA: 2,77 m
2
TEMPERATURA DI STAGNAZIONE: 268°C
SUPERFICIE DI APERTURA: 2,40 m
2
CONTENUTO LIQUIDO: 2,05 l
SUPERFICIE ASSORBITORE : 2,69 m
2
PESO A VUOTO: 52 kg
LIQUIDO TERMOVETTORE:
GLICOLE PREMIX (Acqua + Glicole, max concentrazione 50%)
FLUIDO NON GLICOLICO (Acqua + Inibitori di corrosione
atossici + Potassio Formiato, max concentrazione 50%)
MAX PRESSIONE ESERCIZIO: 10 bar
da Riello S.p.A.
CEN 025
20022981_E4
EN 12975
10000001 BAR CODE 128B
Anno di produzione
SERIALE PROGRESSIVO
FABBRICATO IN ITALIA
DESCRIZIONE : CP25TVA
S/N :
COLLETTORE SOLARE PIANO
DIMENSIONI: 2046X1187X90 mm
SUPERFICIE LORDA: 2,43 m
2
TEMPERATURA DI STAGNAZIONE: 201 °C
SUPERFICIE DI APERTURA: 2,20 m
2
CONTENUTO LIQUIDO: 1,6 l
SUPERFICIE ASSORBITORE: 2,15 m
2
PESO A VUOTO: 36,5 kg LIQUIDO TERMOVETTORE:
ACQUA+GLICOLE PROPILENICO
MAX CONCENTRAZIONE GLICOLE: 50%
MAX PRESSIONE ESERCIZIO: 10 bar
da Riello S.p.A.
20038498_E1
EN 12975
Certif. 011-7S1766 F
12000025 BAR CODE 128B
Anno di produzione
CODICE : 20038250
RIELLO S.p.A.
Via Ing. Pilade Riello, 7 -37045 Legnago (VR) -ITALIA
Matricola
Modello
Codice
Data plate
Serial number plate
Code
Year of production
Serial Number
Description
by Riello S.p.A.
Made in Italy
Flat plate
solar collector
Dimensions
Gross area
Aperture area
Absorber area
Empty weight
Maximum operating pressure
Stagnation temperature
Liquid content
Max glycol concentration
Heat transfer fluid:
water+propylene glycol
9 If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installation and ser-
vicing may be rendered difcult.
2 IDENTIFICATION

5
GENERAL INFORMATION
Technical specications
DESCRIPTION CSV 25 R CSV 35 R
Total area 2,77 3,91 m2
Exposed area 2,40 3,43 m2
Effective absorption area 2,69 3,84 m2
Water connections threaded on Ø 18 pipes mm
Empty weight 52 74 kg
Liquid content 2,05 2,90 l
Recommended ow rate per m2of panel 30 l/(h x
m2)
Absorption (α)> 94 %
Emissions (ε)< 7 %
Maximum permitted pressure 10 bar
Stagnation temperature 268 °C
Maximum number of collectors connectable in series 6n°
Efciency parameters
Description Absorber surface area Open surface area U/M
Optical efciency (ηο) (*) 0,627 0,70 -
Thermal dispersion factor (a1) (*) 1,027 1,15 W/(m2K)
Thermal dispersion temperature dependence factor
(a2) (*) 0,010 0,011 W/(m2K2)
Description U/M
IAM T (50°) (*) 1,07 -
IAM L (50°) (*) 0,954 -
Efciency (ηcol) (**) 64 %
(*) Tested according to EN 12975, referred to a 33.3% water-
glycol mix, ow rate of 170 l/h (CSV 25 R) - 240 l/h (CSV 25
R), 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.
Efciency curve referred to exposed area
1,0
0,8
0,6
0,4
0,2
00 0,02 0,04 0,06 0,08
0,10
Tm* [m
2
KW
-1
]
9 Minimum recommended slope is 15° (to ensure efcient self-cleaning and minimise snow pressure).
Installations in locations liable to frequent snow and hail, and installations on at roofs in locations subject to strong winds
are not recommended (see "Static load" on page 11).
3 TECHNICAL SPECIFICATIONS

6
GENERAL INFORMATION
COLLECTOR WIND AND SNOW LOADING CHART
(Calculated for standard, zone 1 wind loads and snow loads)
Installation
height above
ground (m)
Site’s wind
exposure
Mass in kg to secure collector
against lifting by wind Altitude
(m.a.s.l.)
Total load on roof from wind
and snow loads and collector
weight (kg)
At angle of
45°
At angle of
20°
At angle of
45°
At angle of
20°
CSV 25 R
0-10 low 60 40 100 424 546
10-20 low 80 50 250 595 773
0-10 medium 80 70 100 396 510
10-20 medium 90 80 250 533 691
CSV 35 R
0-10 low 90 80 100 599 771
10-20 low 110 100 250 841 1093
0-10 medium 110 100 100 561 720
10-20 medium 130 120 250 753 976
9 These specications are purely indicative. The entire structure must be inspected by an expert in static loading in compliance
with applicable standards.

7
GENERAL INFORMATION
Connections
The diagram below illustrates the connections between solar collectors in lines.
The ttings are available as accessories to be ordered separately.
collector
temperature sensor
to heat
exchange circuit
from heat
exchange circuit
union
olive
olive
ring nut
ring nut
union
olive
olive
ring nut
union
olive
olive ring nut
stub pipe
stub pipe stub pipe
Collectors in the same line must be connected so that the heat transfer uid ows through them in series.
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
4 CONNECTIONS

8
GENERAL INFORMATION
Water circuit
3
11
°C
M
4
4
4
9
8
11
10
13
14
2
6
12
Valve group
SOLAR
CONTROLLER
17
7
5
15
16
18
19
R M
1 Solar collector
2 Storage cylinder
3 Collector probe
4 Disconnect valves
5 Non-return valve
6 Temperature gauge
7 Vent valve
8 Safety valve
9 Pressure gauge
10 Drain
11 Expansion vessel
12 Pump
13 Flow regulator
14 Flow meter
15 Vent cock
16 Manual bleed valve (accessory)
17 Storage cylinder bottom temperature sensor
18 Storage cylinder top temperature sensor
19 Heat transfer uid recovery
MCollector outlet
RCollector return
9 Connect no more than 6 collectors in series.
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).
5 WATER CIRCUIT

9
GENERAL INFORMATION
Pressure drop in solar collectors
PRESSURE DROP (mbar)
700
800
900
600
500
400
300
200
100
0
0 1000 2000 3000 4000 5000 6000
FLOW RATE (l/h)
_______ CSV 25 R
_ _ _ _ CSV 35 R
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"

10
INSTALLATION
Unpacking the product
6 UNPACKING THE PRODUCT
The solar collectors are packed in various ways depending on
the number of units supplied:
AIn a pack of 1
BPackages of 5 collectors
Pallet contents:
−collector
−documentation envelope containing certicate of war-
ranty and label with bar code.
9 Keep the front of the packaging and use it to shade the glass
tubes before the system is started up.
If the solar collectors are not going to be put into operation
immediately, and there is any risk of their being exposed
to rain, do not use the packaging to shade them as it is not
water-proof.
9 The instruction manual is an integral part of the solar con-
nector. Once located, read it thoroughly and keep it safe.
A
B
Handling
Once you have removed the outer packaging, proceed as follows
to unpack and handle the solar collector:
−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.
9 Wear suitable personal protective equipment and use suit-
able safety devices.
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.
0 Do not lift the solar collector by its water ttings.
A
A
A
A
7 HANDLING
Installation

11
INSTALLATION
Installation
8 INSTALLATION
GENERAL INSTRUCTIONS
Assembly
The system must be installed by specialist personnel. Use only
the assembly material supplied with the solar collector. The sup-
porting framework and all masonry or brickwork xing 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 solar collector must only be installed on roofs or frames
that are strong enough to support its weight. The strength of
the roof or frame must be veried on site by a person expert in
static loading before the solar collector is installed. During this
process, it is important to verify the suitability of the support-
ing frame to hold the screw fasteners that x the solar collector
in place. An expert in static loading must verify that the entire
frame complies with relevant standards, especially in areas lia-
ble to snow and areas exposed to high winds. Conditions (gusts
of wind, formation of wind vortices, etc.) at the point where the
solar collector is to be installed must be carefully considered
since these can increase the loads on the supporting structure.
Allow for a maximum permissible total load on each collector of
850 Pa (possible in the event of a peak wind speed of 130 km/h).
Lightning protection
The metal piping of the solar heating circuit must be connect-
ed to the main potential compensation bar by a (yellow-green)
copper wire (H07 V-U or R) of at least 16 mm2. If a lightning con-
ductor system is already installed, the solar collectors may be
connected to the existing system. Alternatively, the solar collec-
tor piping may be connected to ground via a ground wire sunk
into the earth. Ground wires must be sunk outside the house.
The ground wire must be connected to the potential compensa-
tion bar through a wire of the same diameter.
Water connections
Solar collectors must be connected in series using the threaded
unions provided. If exible pipes are not used to connect the
solar collectors, the piping must be tted with expansion joints
(U-type expansion joints, exible hoses) to absorb thermal ex-
pansion. Provided adequate expansion joints are used, up to 6
solar collectors may be connected in series. Make sure that the
unions are located correctly when tightening them. When tight-
ening a union with a pipe wrench or spanner, always hold the
opposite union steady with a second tool to avoid twisting the
pipe to which the union is attached.
9 All pipes in the water circuit must be insulated in conform-
ity to relevant standards. Lagging and insulation must be
protected against damage by the weather and birds and
animals.
Angle of collectors / General
Solar collectors are designed to be installed at angles of be-
tween 15° (minimum) and 75° (maximum). Make sure that the
bleed and vent valves of the collectors remain open while the
collectors are being installed. Take care to protect all ttings,
connections, bleed and vent valves against dirt and dust etc..
In installations which serve primarily to produce domestic hot
water in the summer, install the collectors facing from east to
west at an angle of between 20 and 60°. The ideal orientation
is southwards, at an angle equal to the latitude of the location
minus 10°. If the system sustains the greatest thermal load in
the winter (as in systems that combine domestic hot water pro-
duction with central heating), install the collectors facing south
(or south-east or south-west) at an angle greater than 35°. The
ideal orientation is southwards, at an angle equal to the latitude
of the location plus 10°.
Flushing and lling
For safety reasons, the solar collector must be covered, using
the packaging it came in, for at least two hours before it can be
lled. In areas liable to frost, ll the collector with an anti-freeze
heat transfer uid.
9 DO NOT ADD WATER TO THE GLYCOL PREMIX.
The anti-freeze supplied for use with solar collectors comes
ready to use. IT MUST NOT BE MIXED WITH WATER.
9 Take care if you ush the system out, because water trapped
inside the circuit before lling with glycol premix may freeze.
Vent
Bleed the circuit:
−On startup (after initial lling) (see the gure on page 12).
−Whenever necessary, as in the event of system malfunc-
tioning.
Make quite sure that all air has been bled out of the system.
9 Risk of burns from hot uid inside the collectors.
9 Only open the vent valve if the temperature of the uid in
the circuit is below 60°C. Make sure that the collectors are
not hot before you start bleeding the circuit. Always cover
the solar collectors before bleeding the circuit. Always per-
form bleeding in the morning.
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: if the uid’s density differs
from that declared in the manufacturer’s technical spec-
ications, replace the anti-freeze uid.
−Check the pH of the anti-freeze uid using litmus paper:
if measured pH differs from that specied in the manu-
facturer’s technical specications, replace the anti-freeze
uid.
9 At the end of its useful life, dispose of the product in com-
pliance with applicable legislation.

12
INSTALLATION
Filling the circuit
Perform the following steps before starting up the system.
1 - FLUSHING AND SEAL TESTING THE SYSTEM
If copper piping has been used and joints have been hot brazed, ush out the system to remove any brazing residues. Seal test the
system after you have ushed it out.
9 Fill the solar collector with anti-freeze heat transfer liquid immediately after ushing it out, because ushing water may remain
trapped in the circuit (with a consequent risk of freezing).
9 The anti-freeze uid supplied as an accessory has been specially formulated for use in solar applications, and maintains its
characteristics over its entire working life. The mix is also non-toxic, biodegradable and biocompatible.
9 Do NOT part ll the circuit with anti-freeze then top up with water.
9 Temperatures in excess of the specied working temperature can cause the anti freeze to break down. This is easily visible be-
cause the liquid becomes darker.
9 FILLING THE CIRCUIT
2 - FILLING
1 Open the non-return valve (A)
2 Open the air vent at the highest point in the system (see
gure alongside) and keep it open throughout the lling
operation
3 Open the vent valve (7)
4 Pump the heat transfer uid around the circuit with an
external lling pump until all air bubbles have been elimi-
nated. Close the manual bleed valve
5 Temporarily raise the pressure in the system to 4 bar
6 Start up the system for about 20 minutes
7 Bleed the circuit again from step 2 until all the air has been
removed
8 Set the circuit pressure at the boiler according to the table
below in order to ensure a minimum pressure of 1.5 bar at
the height of the collector eld.
9 Close the non-return valve (A) and any open vent valves to
prevent the heat transfer uid from evaporating.
°C
M
A
RM
7
Manual bleed
valve (accessory)
Anti-freeze mix
Heat e
xchanger
of solar storage
cylinder
Solar collectors
Heat
transfer fluid
filling pump
Water control system
H
HPressure at boiler
up to 15 m 3 bar
15 - 20 m 3,5 bar
20 - 25 m 4 bar
25 - 30 m 4,5 bar
General rule: p [bar] = 1.5 + H [m] / 10

13
INSTALLATION
9 Do not ll the system in bright, sunny conditions or if the
collectors are hot. Cover the solar collector with the packag-
ing it came in for at least two hours before lling it.
9 Make sure that you have bled all the air out of the system,
using the water control system vent too.
Heat transfer uid lling pump (accessory). A manual bleed
valve is not required if this pump is used.
Checks
On completion of the installation, perform the checks listed in the table below.
10 CHECKS
Collector circuit
Cold circuit pressure:____bar (see table above)
Collector circuit seal test
Safety valve check
Anti-freeze checked to - ___ °C
pH of heat transfer uid = ____
Collector circuit bled
Flow rate of 30 l/h per m2checked
Non-return valve functioning
Solar collectors
Visual check of collectors
Collectors cleaned if necessary
Visual check of collector xing points
Visual check of roof impermeability
Visual check of insulation/lagging

14
COMMISSIONING AND MAINTENANCE
Maintenance
The collector must be cleaned and all parts (reector, glass tubes, etc.) inspected every six months.
REPLACING EVACUATED TUBES
The evacuated tubes are fully functional when delivered. Nev-
ertheless, if problems occur, they can be replaced quickly and
easily.
Defective tubes are easy to recognise because their undersides
turn white and their surfaces become extremely hot.
Proceed as follows to remove an evacuated tube. Wear gloves
and take all the necessary precautions:
−Smear the top of the tube (1) near the seal ring with a
lubricant paste
−Unscrew and remove the plug (2) from the foot of the
tube
−Pull the tube (3) downwards, twisting it gently to release
it from the top seal
−Remove the tube from the bottom of the collector.
If you do not have sufcient room to remove the tube down-
wards, proceed as follows:
−Remove the tube from the collector foot as instructed
above
−Pull the tube down about 20 cm
−Hold the tube in a glove, lift it gently and swivel it to the
left or right. This bends the copper pipes inside the glass
tube. Take care not to damage them, however
−Pull the tube out diagonally across the collector to re-
move it.
Reverse the above steps to t the new tube.
9 Remove any pieces of broken glass without damaging the
surface of the mirror. Also remove any residues that might
have formed around the copper pipes.
9 Make sure that the silicon seal ring is still correctly seated.
silicone.
1
3
2
A
11 MAINTENANCE
Commissioningandmaintenance

15
COMMISSIONING AND MAINTENANCE
REPLACING THE CPC REFLECTOR
Our CPC reectors are manufactured and delivered under the
best possible conditions.
Nevertheless, if a fault (e.g. a large dent) is found, they can be
replaced quickly and easily.
Proceed as follows, taking all the necessary precautions, to re-
move a damaged reector:
−Unscrew and remove the plug (1) from the foot of the col-
lector
−Remove the bracket (2) into which the plug was screwed
by bending back the clips (3)
−Remove the reector (4) without moving its glass tube.
14
2
3
4

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.