Beretta NOVELLA 24-31-45 RAI User manual

NOVELLA
24-31-45 RAI
24-31 RAI PV
BOILERS
CAST IRON
BASE
INSTALLATION MANUAL

INSTALLATION MANUAL
2
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require caution and adequate preparation
a STOP! = Identifies actions that you MUST NOT do
Novella boilers conform to the basic requirements of the following directives:
• Gas Appliances Directive 2009/142/CE
• Boiler Efficiency Directive 92/42/CEE
(✫✫)
• Electromagnetic Compatibility Directive 2004/108/CE
• Low Voltage Directive 2006/95/CE
Novella boilers are therefore CE marked.
0694

3
CONTENTS
1 SAFETY INFORMATION AND PRECAUTIONS ........................................ 4
2 DESCRIPTION OF THE APPLIANCE ........................................................ 5
2.1 Description of the appliance ...............................................................................................................5
2.2 Optional accessories ..........................................................................................................................5
2.3 Main parts of the boiler .......................................................................................................................6
2.4 Control panel ......................................................................................................................................7
2.5 Technical specifications ......................................................................................................................7
2.6 Identification........................................................................................................................................8
2.7 Material supplied.................................................................................................................................9
2.8 Handling..............................................................................................................................................9
2.9 Overall dimensions and water fittings...............................................................................................10
2.10 Water circuit ......................................................................................................................................11
2.11 Wiring diagram..................................................................................................................................13
3 INSTALLATION ......................................................................................... 14
3.1 Installation standards........................................................................................................................14
3.2 Place of installation...........................................................................................................................14
3.3 Installation in existing systems .........................................................................................................14
3.4 Water connections ............................................................................................................................15
3.5 Electrical connections .......................................................................................................................15
3.6 Gas connections ...............................................................................................................................17
3.7 Gas supply conversion .....................................................................................................................17
3.8 Flue gas vent and air intake .............................................................................................................19
3.9 Filling the water circuit ......................................................................................................................19
3.10 Emptying the water circuit ................................................................................................................20
4 START-UP AND FUNCTIONING .............................................................. 21
4.1 Preliminary checks............................................................................................................................21
4.2 Ignition ..............................................................................................................................................21
4.3 Final checks......................................................................................................................................23
5 SHUT-DOWN ............................................................................................ 24
6 MAINTENANCE ....................................................................................... 25
6.1 Scheduled maintenance ...................................................................................................................25
6.2 Extraordinary maintenance...............................................................................................................25
7 OPTIONAL ACCESSORIES ..................................................................... 26

INSTALLATION MANUAL
4
1 SAFETY INFORMATION AND PRECAUTIONS
b This manual and the operation manual
associated with it form integral parts
of the product. Make sure that they are
always kept with the boiler even if it is
transferred to another owner or user, or
re-installed elsewhere. If you damage or
lose this manual, order a replacement
immediately from your local Technical
Assistance Service.
b The boiler must only be installed and
serviced by qualified personnel, in con-
formity to applicable legislation (in Italy,
law 46 of the 05/03/1990) and applica-
ble technical standards (in Italy, UNI-
CIG 7129 and 7131 standards and
subsequent updates thereto).
b The boiler must only be used for the pur-
pose for which it is designed. The manu-
facturer declines all responsibility, con-
tractual or other, for damage to property
or injury to persons or animals caused
by improper installation, adjustment,
maintenance or use.
b As soon as you open the packaging,
check immediately that the contents are
all present and undamaged. Contact the
reseller from whom you purchased the
product if you notice any problems.
b The safety valve must be connected to
a suitable collection and drain system.
The manufacturer declines all responsi-
bility for damage caused by the opera-
tion of an improperly connected safety
valve.
b The following instructions must be pas-
sed on to the user on installation of the
boiler.
- If water leaks from the boiler, turn off the
water supply and contact the manufactu-
rer’s Technical Assistance Service imme-
diately.
- Periodically check that operating pressu-
re in the water circuit is over 1 bar. If
necessary, contact the manufacturer’s
Technical Assistance Service to arrange
servicing by professionally qualified per-
sonnel.
- If the boiler is not going to be used for an
extended period of time, contact the
manufacturer’s Technical Assistance
Service to have at least the following ope-
rations performed:
• Switch the boiler OFF at the control
panel and at the mains power switch
• Close the boiler’s fuel cock, central
heating circuit shut-off cock and dome-
stic hot water circuit shut-off cock
• Empty the central heating circuit and
domestic hot water circuit if there is any
risk of freezing
- The boiler must be serviced at least once
a year. Servicing must be arranged in
advance with the manufacturer’s
Technical Assistance Service
Observe the following precautions to ensure
safe operation of the boiler.
aDo not allow children or uninformed per-
sons to operate the boiler.
aDo not operate any electrical devices or
equipment, including switches or dome-
stic appliances, etc., if you can smell
fuel or fumes. In the event of a gas leak,
thoroughly ventilate the room by opening
wide all doors and windows, close the
gas shut-off valve and call the manu-
facturer’s Technical Assistance Service
immediately to arrange urgent assistan-
ce by professionally qualified personnel.
aDo not touch the boiler while barefoot or
wet.
aNever clean the boiler without first
disconnecting it from the mains electri-
city supply by turning the mains power
switch and the control panel switch OFF.
aDo not tamper with or adjust the boiler’s
safety or control devices without prior
authorisation and instructions from the
manufacturer.
aDo not pull, disconnect, or twist the elec-
trical cables coming from the boiler even
if it is disconnected from the mains elec-
tricity supply.
aDo not obstruct or restrict vents in
the room where the boiler is installed.
Adequate ventilation is essential for cor-
rect combustion.
aDo not store containers of flammable
substances in the room where the boiler
is installed.
aDo not leave items of packaging within
the reach of children.

5
2 DESCRIPTION OF THE APPLIANCE
2.1
Description of the appliance
Novella boilers are gas fuelled boilers for
domestic heating.
They are equipped with an atmospheric bur-
ner and a cast iron primary heat exchanger.
They incorporate an open (type B11BS) com-
bustion chamber and are fitted with a hood
that ensures proper flue gas venting even with
a fluctuating flue draught.
They are also equipped with a flue gas
thermostat, as required by applicable safety
standards.
The burner is a stainless steel unit with stabili-
sed flame and smooth ignition.
The burner is fitted with an ionisation type
flame detection system.
The boiler’s control and safety devices con-
form to applicable technical and safety stan-
dards and are enclosed in a functional control
panel integrated in the body of the appliance.
Novella boilers use total shut-down logic
and do not waste energy because they only
start up when heat is actually needed by the
central heating system (i.e. when the room
thermostat trips).
Novella boilers can be connected to a storage
cylinder to produce domestic hot water, and
can be equipped with temperature controllers
in the form of specific accessories.
Installation, maintenance and access to inter-
nal components is facilitated by a large front
panel.
The key features of these boilers include:
- electronic ignition with ionisation flame
detection
- adjustable smooth ignition
- gas supply solenoid valve with built-in pres-
sure stabiliser and double shutter for burner
control
- domestic hot water temperature control
- water circuit temperature and pressure
gauge
- provision for room thermostat or timer.
Novella RAI PV models also feature:
- central heating circuit pump
- 12 litre expansion vessel
- 3 bar central heating circuit safety valve.
2.2
Optional accessories
- Wall-mounted weekly timer thermostat (part
number 1100279)
- Pump manifold kit (part number 694769)
- High head pump kit (part number 1100269)
- RO120 storage cylinder (part number
696339)
- Pump or valve controlled multizone central
heating kit with total shut-down function
(part number 696439)
- Lifting brackets (part number 696429)

INSTALLATION MANUAL
6
2.3
Main parts of the boiler
8
10
11
9
1
2
3
4
6
5
7
12
19
21
22
20
13
14
15
16
17
18
Fig. 2.2
Fig. 2.1
Novella 24 - 31 RAI PV boilers
Key
1 Control panel
2 Temperature sensor sockets
3 Boiler body
4
Electronic ignition and flame detection unit
5 CH pump
6 Water circuit drain cock
7 Ignition electrode
8 Flame detection sensor
9 Burner
10 Gas supply solenoid valve
11 Lifting points
12 Expansion vessel
Novella 24 - 31 - 45 RAI boilers
Key
13 Control panel
14 Temperature sensor sockets
15 Boiler body
16
Electronic ignition and flame detection unit
17 Ignition electrode
18 Water circuit drain cock
19 Flame detection sensor
20 Burner
21 Gas supply solenoid valve
22 Lifting points

7
2.4
Control panel
29 28
23 24 25 26 27
31 30 30
Fig. 2.3
Key
23 Main switch
24 Central heating temperature control
25
Water circuit temperature and pressure
gauge
26 Safety thermostat (manual reset)
27 Flue gas thermostat (manual reset)
28 Burner lockout LED warning light
29 Power on LED indicator
30 Quick reference guide
31 Burner reset button
2.5
Technical specifications
24 RAI
PV
24 RAI 31 RAI
PV
31 RAI 45 RAI
Rated heat input, CH kW 26,6 34,4 50,0
kcal/h 22880 29590 43000
Rated heat output, CH kW 24,0 31,0 45,0
kcal/h 20640 26660 38700
Electrical consumption W 103 15 103 15
Boiler class II 2H3+
Power supply voltage V ~ Hz 230 ~ 50
Index of protection IP 40
Losses from stack and casing with burner off % 1,65 1,37 1,23
Central heating circuit characteristics
Maximum pressure - temperature bar -°C 3 - 100
CH temperature setting range °C 34-82
Expansion vessel litres 12 -- 12 --
Gas pressure
Rated gas pressure, methane (G 20) mbar 20
Rated gas pressure, LPG (G31) (G 30 - G 31) mbar 28-30/37
Water connections
CH flow – return Ø3/4"
Gas inlet Ø1/2"
Emissions with G 20 gas
CO below p.p.m. 21 19
CO2 % 5,6 5,7 5,5
NOx (according to EN 297) Class 1
 FluegasΔt °C 93 96 113
Boiler dimensions
Height mm 850
Width mm 450 600
Depth mm 700 675 700 675 720
Weight of boiler kg 108 100 126 118 154

INSTALLATION MANUAL
8
2.6
Identification
Novella boilers are identified by a product
name plate giving the boiler’s serial number,
model and main technical and performance
data.
b It is essential to specify the correct
model of boiler when ordering spare
parts or requesting technical assistance.
If the name plate or any other means of
clearly identifying the product is defa-
ced, removed or lost, proper installation
and servicing may be rendered difficult.
GAS FUELLED BOILER
OBLIGATORY GROUND CONNECTION
Model
Code
Year
Heat input at
furnace (Qn/Hi)
Boiler water
capacity
Useful heat
output (Pn)
Heat exchanger
surface area
Maximum working
pressure (mwp)
Maximum admissible
temperature
Power supply Maximum current
draw
NOx class Maximum energy
consumption
Gas supply pressure
CLASS OF BOILER
TYPE OF BOILER
COUNTRY OF DESTINATION
Index of protection
PIN Code
Serial No.
PARAMETER 24 RAI 31 RAI 45 RAI
Lower Wobbe index (at 15°C-1013 mbar) G20 (MJ/m3) 45,5
(at 15°C-1013 mbar) G30 (MJ/m3) 80,9
(at 15°C-1013 mbar) G31 (MJ/m3) 70,9
Main burner
Number of nozzles 3 4 6
Nozzle diameter G20 Ø mm 2,40 2,40 2,40
G30 Ø mm 1,50 1,50 1,45
G31 Ø mm 1,50 1,50 1,45
Nozzle pressure (downstream from valve in central hea-
ting only mode)
G20 mbar Δp13,5 13,5 12,7
mm H2O Δp138 138 129
G30 mbar Δp28,4 28,0 27,8
mm H2O Δp289 285 283
G31 mbar Δp36,5 34,7 35,7
mm H2O Δp372 354 364
Maximum gas ow rate, CH (*) G20 m3/h 2,80 3,50 5,10
G30 kg/h 2,09 2,70 3,92
G31 kg/h 2,05 2,66 3,86
(*) Temperature 15°C; Pressure 1013 mbar.
Fig. 2.4

9
C
P
Fig. 2.5
2.7
Material supplied
The boiler is delivered in a wooden cage.
Proceed as follows to remove this.
- Remove the staples fixing the wooden cage
to the pallet.
- Lift off the wooden cage.
The following items are delivered in a plastic
bag inside the boiler:
- Operation manual
- Installation manual
- LPG conversion kit (nozzles, label, seals).
Instruction manuals are integral parts of the
boiler. On unpacking, locate the manuals and
keep them safe.
Fig. 2.6
MODEL
24 RAI 24 RAI PV 31 RAI 31 RAI PV 45 RAI
Net weight 100 108 118 126 154 kg
Gross weight 119 127 138 146 174 kg
2.8
Handling
Once you have removed the packaging, pro-
ceed as follows to handle the boiler.
- Remove the screws securing the boiler to
the wooden pallet.
- Remove the front panel (P) and top panel
(C) from the casing (fig. 2.6).
- Lift the boiler using two 3/4” pipes (1)
pushed through the lifting points (2) (fig.
2.7).
b Wear suitable personal protective
equipment and use suitable safety
devices.
aDo not leave items of packaging within
the reach of children.
2
1
Fig. 2.7

INSTALLATION MANUAL
10
2.9
Overall dimensions and water fittings
Fig. 2.8
Fig. 2.9
Novella 24, 31, 45 RAI boilers
Novella 24, 31 RAI PV boilers
DESCRIPTION MODEL
24 RAI 24 RAI PV 31 RAI 31 RAI PV 45 RAI
A 450 154 mm
B 675 700 675 700 720 mm