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INSTALLATION
2.7
Gas connections
B
1
TAU
Unit
Unit 70
50
A
1305
B
105
1 - Gas fitting
1/2"
TAU Unit boilers must be connected to a methane or LPG gas
supply in compliance with the relevant standards.
Perform the following checks before making the connection:
− Check that the boiler is compatible with the type of gas
supply
− Check that the gas supply pipes have been thoroughly
cleaned.
A filter of suitable particle rating should be installed.
9
The gas supply line must be suitable for the flow rate de-
manded by the burner. The gas supply system must also be
equipped with all the necessary safety and control devices
required by applicable legislation and standards.
9
On completion of the installation, check that all joints are
sealed.
TAU
TAU
Unit of
TAU
Unit
Unit
meas-
100
115
urement
1405
1605
1605
98
98
98
1/2"
3/4"
3/4"
2.8 Flue gas vent and comburent air intake
The equipment is supplied as standard in type B configura-
tion, hence prepared to suck air directly in the installation room
through the venting openings, that must be carried out in com-
pliance with the Technical Standards.
It can become a type C equipment with the use of specific ac-
cessories. In this configuration the equipment will suck air di-
rectly from the outside with the possibility to have coaxial or
split pipes.
For flue gas extraction and the intake of combustion air, it is
essential to use only specific pipes for condensing boilers and
ensure that they are correctly connected, as shown in the in-
structions supplied with the flue gas accessories.
Exhaust and suction ducts must always be carried out in com-
pliance with national, regional, provincial, etc. standards and
regulations in force (UNI - CIG).
The combustion gases are cooled to a temperature near that of
the central heating return before they leave the boiler body. This
makes it possible to use plastic flue pipes instead of metal ones,
with significant savings in overall installation costs.
To protect the vent pipes against possible damage, TAU Unit
boilers are equipped with a flue gas temperature thermostat.
9
Do not connect this appliance's flue gas extraction pipes
with those of other appliances, unless this is specifically
authorised by the manufacturer. Non-compliance with this
precaution may cause a build-up of carbon monoxide in
the room where the appliance is installed. This could jeop-
ardise people's health and safety.
9
Ensure that combustion air (suction line air) is not contam-
inated by:
− waxes/chlorinated detergents
− chemical products based on swimming pool chlorine
− calcium chloride
− sodium chloride use to soften tap water
− refrigerant leaks
− paint or varnish removers
− chloridric acid/muriatic acid
mm
− cements and glues
− anti-static softeners used in dryers
mm
− chloride used for domestic or industrial applications as
Ø
detergent, whitener or solvent
− adhesives used to glue construction and other similar
products.
9
To prevent thermal unit contamination, do not install suc-
tion air intakes and flue gas exhaust ducts near:
− dry-cleaners/laundry rooms and factories
− swimming pools
− metal processing plants
− beauty parlours
− fridge repair shops
− photo-processing facilities
− body-shops
− plastics manufacturing plants
− furniture workshops and manufacturing plants.
16
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