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PRACTIKA 28-33
USE AND INSTALLATION MANUAL
Chapter 4
page 20
Installing a “Practika”
Technical dept. - All rights reserved - Reproduction prohibited
4.2.
Packaging
The boiler is delivered complete with all electrical and mechanical components and it is factory tested.
The boiler must always be handled vertically, using manual or mechanical cranes, which can lift the pallet on
which it is packaged or the boiler itself directly.
Take special care not to damage electrical or mechanical parts, with shocks or water sprays once the
protective packaging has been removed.
After removing the packaging, make sure the boiler is complete and undamaged
If in doubt, contact the retailer
The document envelope contains:
System manual
An instruction manual for installation, use and maintenance
Appendix G - Technical inspection report for heating system with an output of less than 35 kW
Guarantee
4.3.
Boiler room
Make sure the room complies with the requirements and characteristics set out in the applicable regulations
in force. It is also necessary for the room to provide at least as much air as is required for regular
combustion. It is therefore necessary to make holes in the walls of the room, which comply with the
following requirements:
Have a free cross-section of at least 6 cm
2
for every 1 kW (859,64 kcal/h). The minimum cross-
section of the opening must nevertheless never be less than 100 cm
2.
The cross-section can also be
calculated using the following ratios:
S = K * Q ≥ 100 cm
2
Where “S” is expressed in cm
2
, “Q” in kW, “K” = 6 cm
2
/kW
The opening must be situated at the bottom of an external wall, preferably opposite the one where
the combustion gases are vented.
4.4.
Connection to the flue pipe
For the connection of the flue outlet pipe, local and national regulations must be observed (see Standards
UNI 7129 and UNI 10683).
A flue pipe must comply with the following requirements:
It must be made of waterproof material resistant to the temperature of the smoke and related
condensation
It must ensure sufficient mechanical resistance and weak heat conductivity
It must be perfectly sealed, to avoid the cooling of the flue pipe itself.
It must be arranged as vertically as possible
Chimneys both old and new, built without observing the above specifications may be conveniently
recovered by "intubating" the chimney itself. This means a metal flue shall be inserted inside the
existing chimney and the space between the metal flue and the chimney shall be filed with suitable
insulation.
In order to prevent the wind from creating pressure areas around the chimney that prevail over the
rising force of the combustion gases, the outlet aperture must be positioned at least 0.5 metres