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1.12 DUCTING OF FLUES OR
TECHNICAL SLOTS.
With a specific "ducting system" it is possible to
reuse existing flues, chimneys and existing or
new technical slots to discharge the water heater
fumes. Ducting requires ducts declared to be
suitable for the purpose by the manufacturer,
following the installation and user instructions,
provided by the manufacturer and the require-
ments of the regulations in force.
1.13 INSTALLATION OF BOILER TYPE B
WITH OPEN CHAMBER AND FAN
ASSISTED (OPTIONAL).
This configuration requires use of a special
terminal (Ref. 1 Fig. 16) (present in the intake
kit for the installation in question) to be placed
on the intake hole above the sealed chamber
(Fig. 16). Air intake takes place directly from
the environment and flue exhaust in individual
chimney or to the outside.
With this configuration:
- air intake takes place directly from the envi-
ronment in which the appliance is installed
and only functions in permanently ventilated
rooms, according to the regulations in force;
- the flue exhaust must be connected to its own
individual flue or ducted directly into the
external atmosphere;
- type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours or
substances (e.g. acid vapours, glues, paints, sol-
vents, combustibles, etc.), as well as dusts (e.g.
dust deriving from the working of wood, coal
fines, cement, etc.), which may be harmful for
the components of the appliance and jeopardise
operation.
- in configuration type B, the boilers must not be
installed in bedrooms, bathrooms or in bedsits.
The technical regulations in force must be
respected.
Max. length of exhaust pipe.
The exhaust pipe (both vertical or horizontal) can
be extended to the maximum length indicated in
the table on page 8.
1.14 FLUE EXHAUST TO FLUE/CHIMNEY.
The flue exhaust does not necessarily have to be
connected to a branched type traditional flue.
The discharge of flue gases, just for the water
heaters installed in configuration C, can be
connected to a particular LAS type collective
flue. For B
configurations, discharge is only
22
allowed into individual flue or directly into the
outside atmosphere by the relevant terminal.
Multiple and combined flues must be specially
designed according to the calculation method
and requirements of the standards (such as EN
13384), by professionally qualified technical staff.
Chimney or flue sections for connection of the
flue exhaust pipe must comply with requisites of
technical standards in force.
1.15 FLUES, CHIMNEYS AND CHIMNEY
POTS.
The flues, chimneys and chimney caps for the
evacuation of combustion products must be
in compliance with the applicable standards
in force.
Positioning the exhaust terminals. The exhaust
terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum dis-
tances specified in current technical standards.
Combustion products exhaust of natural
draught or fan assisted appliances in open-top
closed environments. In spaces closed on all
sides with open tops (ventilation pits, court-
yards etc.), direct combustion product exhaust
is allowed for natural draught or fan assisted gas
appliances with a heat input range from 4 to 35
kW, provided the conditions as per the current
technical standards are respected.
16
12
1.16 GAS SYSTEM START-UP.
To start up the system, refer to the technical
standards in force. In particular, for new gas
systems:
- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from the pipelines;
- check that the internal system is properly sealed
according to the specifications set forth by
technical regulations in force.
1.17 WATER HEATER START UP
(IGNITION).
Attention: before commissioning the water heater,
if it is operated with LPG, make sure parameters 2
and 13 on page 20 have been set correctly.
To commission the water heater (the operations
listed below must only be performed by qualified
personnel and in the presence of staff only):
- check that the internal system is properly sealed
according to the specifications set forth by
regulations in force;
- ensure that the type of gas used corresponds to
water heater settings;
- check connection to a 230V-50Hz power
mains, correct L-N polarity and the earthing
connection;
-check that there are no external factors that may
cause the formation of fuel pockets;
- switch the water heater on and ensure correct
ignition;
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check activation of the main switch located
upstream of the water heater;
- check that the concentric intake-exhaust ter-
minal (if fitted) is not blocked.
The water heater must not be started up even if
only one of the checks should be negative.
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