Beretta NOVELLA 31 RAI User manual

Installation Manual
NOVELLA 31-45 RAI
Boilers | Cast Iron Base
EN
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

3
CONTENTS
1 SAFETY INFORMATION AND PRECAUTIONS ................................................. 4
2 DESCRIPTION OF THE APPLIANCE .......................................................... 5
2.1 Description............................................................................................................................................... 5
2.2 Optional accessories ............................................................................................................................... 5
2.3 Main parts of the boiler............................................................................................................................ 6
2.4 Control panel............................................................................................................................................ 6
2.5 Technical specifications........................................................................................................................... 7
2.6 Identification............................................................................................................................................. 8
2.7 Material supplied ..................................................................................................................................... 8
2.8 Handling................................................................................................................................................... 9
2.9 Overall dimensions and water fittings ..................................................................................................... 10
2.10 Water circuit ............................................................................................................................................. 10
2.11 Multi line wiring diagram.......................................................................................................................... 12
3 INSTALLATION............................................................................................. 13
3.1 Installation standards............................................................................................................................... 13
3.2 Place of installation .................................................................................................................................. 13
3.3 Installation in existing systems ................................................................................................................ 13
3.4 Water connections ................................................................................................................................... 14
3.5 Electrical connections.............................................................................................................................. 14
3.6 Gas connections...................................................................................................................................... 16
3.8 Flue gas vent and air intake .................................................................................................................... 18
3.9 Filling the water circuit............................................................................................................................. 18
3.10 Emptying the water circuit ....................................................................................................................... 19
4 START-UP AND FUNCTIONING .................................................................. 20
4.1 Preliminary checks................................................................................................................................... 20
4.2 Ignition ..................................................................................................................................................... 20
4.3 Final checks............................................................................................................................................. 22
5 SHUT-DOWN................................................................................................. 23
6 MAINTENANCE ............................................................................................ 24
6.1 Scheduled maintenance.......................................................................................................................... 24
6.2 Extraordinary maintenance...................................................................................................................... 24
7 OPTIONAL ACCESSORIES ......................................................................... 25

INSTALLATION MANUAL
4
1 SAFETY INFORMATION AND PRECAUTIONS
b This manual and the operation manu-
al 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 ser-
viced by qualified personnel, in conform-
ity to applicable legislation and applica-
ble technical standards.
b The boiler must only be used for the
purpose for which it is designed. The
manufacturer declines all responsibili-
ty, contractual or other, for damage to
property or injury to persons or animals
caused by improper installation, adjust-
ment, 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 responsibility
for damage caused by the operation of
an improperly connected safety valve.
b The following instructions must be
passed on to the user on installation of
the boiler:
- if water leaks from the boiler, turn off
the water supply and contact the man-
ufacturer’s Technical Assistance Service
immediately.
- periodically check that operating pres-
sure 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
operations 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 domes-
tic 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 devic-
es or equipment, including switches or
domestic 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 manufacturer’s Technical Assistance
Service immediately to arrange urgent
assistance by professionally qualified
personnel
aDo not touch the boiler while barefoot or
wet
aNever clean the boiler without first dis-
connecting it from the mains electrici-
ty 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
electrical cables coming from the boiler
even if it is disconnected from the mains
electricity 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 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.

5
2 DESCRIPTION OF THE APPLIANCE
2.1
Description
Novella RAI boilers are gas fuelled boilers for
domestic heating. They are equipped with an
atmospheric burner 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 stabilised 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 stand-
ards 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 stor-
age cylinder to produce domestic hot water,
and can be equipped with temperature con-
trollers 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
- provision for room thermostat or timer.
2.2
Optional accessories
- wall-mounted weekly timer thermostat (cod.
1100279)
- pump manifold kit (cod. 694769)
- high head pump kit (cod. 1100269)
- RO120 storage cylinder (cod. 696339)
- pump or valve controlled multizone central
heating kit with total shut-down function
(cod. 696439)
- lifting brackets (cod. 696429)

INSTALLATION MANUAL
6
2.3
Main parts of the boiler
Key
11 Main switch
12 Central heating temperature control
13 Water circuit temperature and tempera-
ture gauge
14 Safety thermostat (manual reset)
15 Flue gas thermostat (manual reset)
16 “Burner lockout” LED warning light
17 “Power on” LED indicator
18 Quick reference guide
19 Burner reset button
Key
1 Control panel
2 Temperature sensor socket
3 Boiler body
4 Electronic ignition and flame detection
unit
5 Ignition electrode
6 Water circuit drain cock
7 Flame detection sensor
8 Burner
9 Gas supply solenoid valve
10 Lifting points
29 28
23 24 25 26 27
31 30 30
Fig. 2.2
11 12 13 14 15
161718 1819
19
21
22
20
13
14
15
16
17
18
Fig. 2.1
1
10
9
8
7
2
3
4
5
6
2.4
Control panel

7
31 RAI 45 RAI
Rated heat input, CH kW 34,4 50,0
kcal/h 29590 43000
Rated heat output, CH kW 31,0 45,0
kcal/h 26660 38700
Electrical consumption W 15
Category II 2H3+
Power supply voltage V ~ Hz 230 ~ 50
Index of protection IP 40
Losses from stack and casing with burner off % 1,37 1,23
Central heating circuit characteristics
Maximum pressure - temperature bar -°C 3 - 100
CH temperature setting range °C 34-82
Gas pressure
Rated gas pressure, methane (G20) mbar 20
Rated gas pressure, LPG (G30-G31) mbar 28-30/37
Water connections
CH flow - return Ø3/4"
Gas inlet Ø1/2"
Emissions with G20 gas
CO below p.p.m. 21 19
CO2 % 5,7 5,5
NOx (according to EN 297) class 1
Flue gas Δt °C 96 113
Boiler dimensions
Height mm 850
Width mm 450 600
Depth mm 675 720
Weight of boiler kg 118 154
2.5
Technical specifications
PARAMETER 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 nozzles 4 6
nozzle diameter G20 Ø mm 2,40 2,40
G30 Ø mm 1,50 1,45
G31 Ø mm 1,50 1,45
Nozzle pressure
(downstream from valve in central heating only mode)
G20 mbar Δp13,5 12,7
mm H2O Δp138 129
G30 mbar Δp28,0 27,8
mm H2O Δp285 283
G31 mbar Δp34,7 35,7
mm H2O Δp354 364
Maximum gas flow rate, CH (*) G20 m3/h 3,50 5,10
G30 kg/h 2,70 3,92
G31 kg/h 2,66 3,86
(*) Temperature 15°C; Pressure 1013 mbar

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 assis-
tance. If the name plate or any other
means of clearly identifying the prod-
uct is defaced, removed or lost, proper
installation and servicing may be ren-
dered difficult.
Fig. 2.4
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:
- instruction manual
- LPG conversion kit (nozzles, label, seals).
Instruction manuals are integral parts of the
boiler. On unpacking, locate the manuals and
keep them safe.
MODEL
31 RAI 45 RAI
Net weight 118 154 kg
Gross weight 138 174 kg
Fig. 2.3

9
C
P
Fig. 2.5
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. 2.5)
- lift the boiler using two 3/4" pipes (1)
pushed through the lifting points (2) (fig.
2.6).
b Wear suitable personal protective
equipment and use suitable safety
devices.
aDo 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.
2
1
Fig. 2.6

INSTALLATION MANUAL
10
2.9
Overall dimensions and water fittings
Fig. 2.7
DESCRIPTION MODEL
31 RAI 45 RAI
A 450 154 mm
B 675 720 mm
2.10
Water circuit
MI
GAS
RI
A
B
C
D
A Water circuit drain cock
B Water circuit temperature control
sensor
C Safety thermostat temperature sen-
sor
D Water circuit temperature gauge
sensor
MI CH flow
RI CH return
GAS Gas supply
Fig. 2.8