red
PRACTIKA 28-33
USE AND INSTALLATION MANUAL
Chapter 3
page 18
Technical specifications and dimensions
Technical dept. - All rights reserved - Reproduction prohibited
3.5.
Information for using pellets
The main characteristic of the boiler is that it burns a natural fuel (pellets) obtained ecologically from wood
industry waste (sawdust, chips). The sawdust and chips obtained from wood machining are first suitably
cleaned and dried, and then compacted at very high pressure to produce small nuggets of pure wood, i.e.
pellets.
It is an absolutely ecological fuel since it does not use any glue to keep it compact. Indeed, the compact
nature of pellets over time is ensured by a natural substance found in wood: jet (or lignite).
Each pellet can vary in length and thickness, between 1÷3 cm in length and 6÷8 mm in diameter
respectively. The main characteristics of pellets are their low humidity (below 12%). Their high density
(approx. 600 kg/m
3
) and regular compact texture give this type of fuel properties of high calorific value (NCV
4100÷5000 kcal/kg).
In order to prolong the life cycle of the boiler, RED recommends the use of good quality pellets.
The pellets to be used to power the boiler must have high quality characteristics, such as those set out in
standards DIN 51731 and ÖNORM M7135.
It is vital that you check regularly that there are some pellets left inside the
tank to avoid them running out completely and therefore the boiler shutting
off.
WARNINGS
The use of poor quality pellets or of any other inappropriate material could
damage certain components of the boiler and jeopardise its correct
functioning: this could render the guarantee null and void, and relieve the
manufacturer of any liability. RED encourages users to use pellets which
comply with the characteristics set out herein above.
3.6.
Basic fuel requirements
The fuel, in the form of pellets, must be dry. The appliance manufacturer recommends that the fuel
is kept in dry, well aired premises.
It is strictly forbidden for the fuel to be kept near the system (either the boiler or the burner); the
minimum safety clearance between the fuel and the appliance is
400 mm
.
The system manufacturer recommends an optimal distance between the boiler and the fuel tank of
at least
1000 mm
. It is advisable for the fuel to be kept in a room close to the one where the boiler
is installed.
The fire prevention regulations must be taken into consideration during the system installation
procedure and during the fuel storage. It is also recommended that a fire extinguisher be fitted in a
safe and easily accessible place.
