Riello INSIEME EVO 25 Manual

cod. 20113821 rev. 2 07/2016
INSIEME EVO 25
EN INSTALLATION AND MAINTENANCE MANUAL

2
Dear heating engineer,
Congratulations on having chosen a Rboiler. You have
selected a modern, quality product that is designed to give
dependable, efcient and safe service and to provide comfort
in the home for many years to come.
This manual provides information that is essential to the
installation of the appliance. Used in conjunction with your
own knowledge and expertise it will enable you to install the
appliance quickly, easily, and correctly.
Please accept our thanks and our congratulations on your choice
of product.
Riello S.p.A.
CONFORMITY
INSIEME EVO 25 boilers conform to the following directives:
−Directive 92/42/EEC on efciency requirements
−Electromagnetic Compatibility Directive 2014/30/EU
−Low Voltage Directive 2014/35/EU
−Ecodesign Directive 2009/125/CE for energy-related
products
−Energy Labelling Directive 2010/30/EU
−Delegated Regulation (EU) N. 811/2013
−Delegated Regulation (EU) N. 813/2013
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.
ENGLISH
RANGE
MODEL CODE
INSIEME EVO 25 20108987
ACCESSORIES
For a complete list of accessories and details of their compatibility,
refer to the Catalogue.

3
This manual, Code 20113821 - Rev. 2 (07/2016)
comprises 44 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.
1 GENERAL INFORMATION ............................4
1.1 General Safety Information ......................4
1.2 Precautions..................................4
1.3 Description of the appliance .....................5
1.4 Safety devices ................................5
1.5 Identication ................................5
1.6 System layout ................................6
1.7 Technical specications.........................8
1.8 Central heating system pump ....................9
1.9 Location of sensors ........................... 10
1.10 Control panel ................................11
2 INSTALLATION .....................................12
2.1 Unpacking the product ........................ 12
2.1.1 Positioning of labels .......................... 12
2.2 Overall dimensions and weights ................. 12
2.3 Moving and removing the packing ............... 13
2.4 Installation premises ......................... 14
2.4.1 Recommended minimum distances .............. 14
2.5 Installation in older systems and systems requiring
modernisation .............................. 14
2.6 Water connections ........................... 15
2.7 Boiler water circuit ........................... 15
2.8 Typical water system schematics ................. 16
2.9 Fuel connections..............................17
2.10 Hoses should also be xed to the oor and suitably
protected whenever possible ................... 18
2.10.1 Technical specications of stack ................. 18
2.10.2 Connection to the stack ....................... 18
2.11 System lling and emptying .................... 19
2.11.1 Water quality requirements..................... 19
2.11.2 Filling ..................................... 19
2.11.3 Emptying ..................................20
2.12 Wiring diagram .............................. 21
2.13 Electrical connections ......................... 22
3 COMMISSIONING AND MAINTENANCE...............24
3.1 Preparing for initial startup .....................24
3.2 Initial startup ...............................24
3.2.1 Ignition failure ..............................24
3.2.2 Resetting the burner and safety thermostat ........25
3.3 Checks during and after initial start-up ...........25
3.3.1 Storage cylinder pump control ..................26
3.3.2 Burner control and adjustment.................. 27
3.3.3 Burner functioning and programming ............28
3.4 Temporary shutdown .........................36
3.5 Preparing for extended periods of disuse ..........36
3.6 Cleaning and servicing the boiler ................ 37
3.7 Annual cleaning ............................. 37
3.7.1 Cleaning and maintaining the burner............. 37
3.7.2 Cleaning the boiler ...........................39
3.7.3 External cleaning ............................40
3.8 Troubleshooting ............................. 41
4 RECYCLING AND DISPOSAL ........................42

4
GENERAL INFORMATION
1 GENERAL INFORMATION
1.1 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 heating
engineer. On completion of the installation, the installer
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
property or injury to persons or animals caused by improper
installation, adjustment, maintenance or use.
9 The room where the boiler is installed must be properly
ventilated to ensure a sufcient supply of air for correct
combustion.
9 If you notice any water leaks, disconnect the boiler from the
mains electricity supply and shut off the water supply.
9 The boiler must be serviced at least once a year.
9 Periodically check that pressure in the central heating
circuit, when cold, is approximately 1.5 bar and below the
maximum limit specied for the boiler.
9 If the boiler is not going to be used for an extended period of
time, perform the operations described later in this manual.
9 This manual is an integral part of the equipment and
therefore must be stored carefully and must ALWAYS
accompany the boiler even if it is sold to another Owner or
User or transferred to another plant. If it is damaged or lost,
request another copy from your local Technical Assistance
Service R.
1.2 Precautions
The operation of any appliance that uses fuel, electrical power
and water demands that a number of fundamental safety
precautions be respected:
0 Do not allow children or inrm persons to operate the
system unsupervised.
0 It is forbidden to use electrical devices or equipment, such
as switches, appliances, etc. if there is a smell of gas or un-
burnt products. If so:
−Ventilate the room, opening doors and windows
−Close the fuel shut-off cock.
0 Do not touch the boiler while barefoot or wet.
0 Never clean or service the boiler without rst disconnecting
it from the mains electricity supply by turning the mains
power switch and the control panel switch OFF.
0 Do not tamper with or adjust the safety or control devices
without prior authorisation and instructions from the
manufacturer.
0 Never pull, disconnect, or twist the electrical cables coming
from the appliance even if it is disconnected from the mains
electricity supply.
0 Do not obstruct or restrict the vents in the room where
the boiler is installed. Adequate ventilation is essential for
correct combustion.
0 Do not expose the boiler to the elements. It is not designed
for use outdoors.
0 It is prohibited to leave inammable substances and
containers in the room where the boiler is installed.
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
compliance with applicable legislation.
0 It is forbidden to operate the boiler without water.

5
GENERAL INFORMATION
1.3 Description of the appliance
The INSIEME EVO 25 boiler is a hot water boiler for central heating
systems. It can function at low temperature and is oil fuelled.
The single stage oil burner has a vertical steel combustion
chamber. The boiler body is thoroughly and effectively insulated
with a layer of high density glass wool. The INSIEME EVO 25
boiler's control logic incorporates a total shutdown function
to minimise energy consumption. The boiler only starts up if
the central heating system requests heat (i.e. when the room
thermostat switches the heating on).
1.4 Safety devices
INSIEME EVO 25 boilers incorporate the following safety and
control devices:
−A manual reset safety thermostat that forces a safety
shutdown if boiler temperature exceeds the safety
threshold (100°C). The sensor used to monitor this
temperature is located on the body of the heat exchanger;
−A minimum temperature thermostat that enables the
central heating pump only if boiler temperature exceeds
the minimum permissible (50°C);
−An electronic burner controller that monitors the correct
functioning of the selected burner program and sends
a lockout signal to the control panel in the event of an
error.
9 The intervention of a safety device indicates a potentially
dangerous malfunction in the system. Contact the
manufacturer’s Technical Assistance Service immediately.
9 Safety devices must only be replaced by the manufacturer's
Technical Assistance Service using original spare parts. Refer
to the spare parts catalogue supplied with the boiler.
0 Do not use the boiler if any of its safety devices are faulty.
Always check that the boiler is functioning correctly after repairs
have been made.
1.5 Identication
The products are identied by:
Serial number plate
This is located on the boiler body and species the serial
number, model, and main technical specications.
Pms= bar T = °C
Qn(min)=
Pn(min)=
TIPO/TYP/TYP/TYPE/TIPO/TIPO:
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF/FUEL/COMBUSTIBLE/COMBUSTÍVEL:
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
IP
WV~Hz
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
PAESE DI DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSLAND/LAND VON BESTEMMING
COUNTRY OF DESTINATION/PAÍS DE DESTINO/PAÍS DE DESTINO:
T067815GE
kW
S
X
%
mg/kWh
NO
Mod.
Cod.
N°
Qn(max) kW
Pn(max) kW
bar
Pms
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
T067815GE
Data plate
This lists the technical specications and performance of the
product.
Central heating section
Qn Rated heat input
Pn Rated useful heat output
IP Electric degree of protection
Pms Maximum operating pressure, CH circuit
TTemperature
η Efciency
D Specic ow rate
NOx NOx class
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 INFORMATION
1.6 System layout
INSIEME EVO 25
5
6
3
4
7
8
9
10
12
13
14
11
15
16
17
17
18
1
2
1 Safety valve
2 Fuel oil hoses
3 Control panel
4 Sensor sockets
5 Capillary pressure gauge tting
6 CH circuit expansion vessel
7 Burner
8 Drain cock
9 Central heating system pump
10 Water tting for storage cylinder (if installed)
11 Flame inspection window
12 Boiler body
13 Fuel oil lter
14 Serial number plate
15 Flue gas exhaust tting
16 Flue gas box cover
17 Lifting bracket
18 Automatic bleed valve

7
GENERAL INFORMATION
BURNER
3
9
11
5
6
2
7
8
10
1
4
1 Pump
2 Burner controller
3 Reset button with lockout indicator
4 Flange with seal
5 Air damper adjuster screw
6 Air intake
7 Oil pump pressure adjuster screw
8 Pressure gauge tting
9 Photoresistor
10 Combustion head
11 Motor
OIL PUMP
7
6
5
4
3
2
1
8
1 Suction port
2 Return
3 By-pass screw
4 Pressure gauge tting
5 Pressure adjuster screw
6 Vacuum gauge tting
7 Valve
8 Auxiliary pressure measurement tting

8
GENERAL INFORMATION
1.7 Technical specications
DESCRIPTION INSIEME EVO 25
Device type
Low temperature
central heating
B23
Fuel Heating fuel oil
(light oil)
Maximum rated heat input at furnace referred to HVC (LCV) 27,5 (26) kW
Useful (rated) heat output 25 kW
Maximum useful heat output P4 (60-80°C) 24,7 kW
30% heat output P1 with return at 37°C 7,4 kW
Efciency class in central heating mode B
Seasonal energy efciency in central heating mode ηs 86 %
Efciency at rated heat output in high temperature
mode referred to HCV η4 Pn (60-80°C) 89,6 %
Efciency at 30% rated heat output in low
temperature mode referred to HCV η1 with return at 37°C 91 %
Heat loss in standby mode Pstby 44 W
Combustion efciency referred to LCV 96 %
Annual energy consumption QHE 82,6 GJ
Noise level (sound power) LWA 60 dB(A)
Emissions at maximum heat input
NOx (referred to HCV) 170 mg/kWh
CO2 12,5 %
CO w.a. < 20 ppm
Flue gas T At Pn (60-80°C) 110 °C
Smoke scale < 0,5
Flue gas mass ow rate 10,0 g/s
Maximum working pressure 3bar
Safety thermostat trip temperature 100 °C
Maximum operating temperature 55-82 °C
Minimum return temperature 37 °C
Boiler water capacity 30 l
Turbulators 19
Volume of expansion vessel (CH) 8 l
Precharge of expansion vessel (CH) 1,5 bar
Index of protection X0D IP
Power supply 230 V - 50 Hz
Absorbed power supply (max) 184 W
Consumption at full load Elmax 131 W
Consumption at part load Elmin 39 W
Electrical consumption in standby mode P sb 12 W
LCV: Lower caloric value of fuel
HCV: Higher caloric value of fuel
Test conditions:
−Room temperature 22°C
−Atmospheric pressure 1018 mbar

9
GENERAL INFORMATION
1.8 Central heating system pump
DESCRIPTION INSIEME EVO 25
Electrical consumption 53 W
EEI Part 3 (*) ≤0,20
P L,Avg (**) ≤24 W
Minimum pressure at pump suction inlet 0,5 bar
(*) Energy efciency rating according to regulations 641/2009-622/2012
(**) Approximate average annual electricity consumption according to regulations 641/2009-622/2012
PUMP CURVES
0
1
2
3
4
5
Q [m³/h]
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 Q [m³/h]
6
7
[m]
H
0
10
20
30
40
50
60
[kPa]
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0
p
0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9
0
1,0
Q [l/s]
10
20
30
40
50
[W]
P1
Residual head
Flow-rate
The curves refer to a water density of 983.2 Kg/m3, a water temperature of +20°C, and a kinematic viscosity of 0.474 mm2/s (0.474
cSt).

10
GENERAL INFORMATION
1.9 Location of sensors
INSIEME EVO 25
Tm
1
TS
TR
2
TS Safety thermostat sensor
Tm Minimum temperature thermostat
sensor
TR Boiler thermostat sensor
1 Boiler temperature gauge
2 Boiler temperature gauge socket