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1.13 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 the use of ducts
declared to be suitable for the purpose by the
manufacturer. Follow the installation and user
instructions provided by the manufacturer and
the requirements set forth by standards in force.
1.14 CONFIGURATION TYPE B, OPEN
CHAMBER AND FAN ASSISTED FOR
INDOORS.
The appliance can be installed inside buildings
in B mode; in this case, all technical rules, and
national and local regulations in force, must be
complied with.
- type B open chamber water heaters 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,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of wood,
coal fines, cement, etc.). These may be damag-
ing for the components of the appliance and
jeopardise functioning.
- in configuration type B, the water heaters must
not be installed in bedrooms, bathrooms or in
bedsits.
- The installation of appliances in configuration
B is only recommended outdoors (in a partially
protected place) or in places that are not lived
in and which are permanently ventilated.
1.15 FLUE EXHAUST TO FLUE/CHIMNEY.
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 con-
nected to a particular LAS type collective flue.
For B configurations, discharge is only 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 require-
ments of the technical standards in force, by a
professionally qualified company. Chimney or
flue sections for connection of the flue exhaust
pipe must comply with requisites of technical
standards in force.
1.16 FLUES, CHIMNEYS AND CHIMNEY
CAPS.
The flues, chimneys and chimney pots for the
evacuation of combustion products must be in
compliance with technical standards in force.
Positioning the exhaust terminals. The wall flue
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, courtyards
etc.), direct flue gas exhaust is allowed for natural
or forced draught gas appliances with a heating
power range from 4 to 35 kW, provided the
conditions as per the current technical standards
are respected.
1.17 GAS SYSTEM START-UP.
To start up the system, refer to the technical
standard in force: This divides the systems and
therefore the start-up operations into three
categories: new systems, modified systems, re-
activated systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or open 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;
1.18 WATER HEATER START UP
(IGNITION).
In order to issue the Declaration of Conform-
ity required by the laws in force, the following
requirements must be fulfilled to commission
the water heater (the operations listed below
must only be performed by a qualified firm and
without any unauthorised persons):
- check that the internal system is properly sealed
according to the specifications set forth by
technical 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 earthing con-
nection;
- Check that there are external factors that may
cause the formation of fuel pockets;
- switch the water heater on and ensure correct
ignition;
- make sure that the gas flow rate and relevant
pressure values comply with those given in the
manual (par. 3.13);
- 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 intake/exhaust concentric 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.
13
1.19 KITS AVAILABLE ON REQUEST.
• Polyphosphate dispenser kit. The polyphos-
phate dispenser reduces the formation of lime-
scale and preserves the original heat exchange
and domestic hot water production conditions.
The water heater is prepared for application of
the polyphosphate dispenser kit.
• Anti freeze kit with resistance (on request). If
the water heater is installed in a place where the
temperature falls below 0°C and the appliance
can freeze. To prevent freezing of the domestic
hot water system, an anti freeze kit with an elec-
trical resistance can be fitted from the relative
cable and from a control thermostat.
• Bracket kit for Omni Container. If necessary,
the water heater can be installed inside the
Omni Container. For assembly, use the relevant
support bracket contained in the kit.
The above-mentioned kits are supplied complete
with instructions for assembly and use.
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