Pellet store
No cables/pipes in the pellet store
39
Conversion to ventilated sealing cover
For filling nozzles and sealing caps available from
ETA, the interior of the sealing caps contain a cover for
sealing. If this cover is removed, air enters the pellet
store via the sealing cover. The cover is thus ventilated
with a cross section of 30 cm² per cover.
Fig. 6-6: Sealing cover
1
unventilated sealing cover (with cover mounted)
2
dismantled cover
3
ventilated sealing cover
If the filling nozzles are mounted inside the
building, they must be tightly sealed. The cover
inside the sealing cover may not be removed (see
ÖNORM M 7137). This prevents a possible escape of
gases into the interior of the building.
If the filling nozzles are not properly positioned (for
example, when installed on the weather side of the
building), water can also penetrate into the pellet store
via the ventilated sealing cover. This is to be avoided
to prevent swelling of the pellets.
Earthing the filling nozzles
Connect the filling nozzles to the earthing of the
house's electrical system with a 6 mm² earthing cable.
Extension of the filling pipes
The ETA filling nozzles are made of aluminium piping
(100 x 2 mm) and can be extended if needed. If the
tank truck can approach close to the filling nozzle so
that its filling distance (30 m) is not already exceeded
outside the building, then filling lines up to 20 m in
length pose no problem. Height differences of one
floor, or even two for short lines, can also be overcome
without problems.
Extension with aluminium piping only
•
Only aluminium piping may be used for the filling
system. Do not use plastic piping (danger due to
electrostatic charge build-up).
•
The filling system must be earthed against electro-
static charges.
•
The filling system must be smooth on the inside
throughout its length; do not use spiral ventilation
ducting.
•
If bends are used, their radius of curvature should
be at least five times the pipe's radius. As an alter-
native, you can make 90° bends by using two 45°
bends with a straight piece between them.
•
The filling system should not end in a bend. To
ensure that the pellets are blown out straight, a
straight length of pipe at least 50 cm long must
come after a bend.
6.5
No cables/pipes in the pellet store
No water pipes or electrical cables in the pellet
store
In the pellet store, there should be no water pipes or
electrical cables. Water from a broken pipe would
cause the pellets to swell up. Uninsulated electrical
parts could ignite a dust explosion.
Existing cold water pipes that can only be removed
with unreasonable effort must be insulated against
condensation to ensure that the pellets cannot be
damaged by dripping condensation.
Pipes and cables in the path of pellets being injected,
especially those on the ceiling, must be shielded.
Ensure that the pellets are gently deflected by a
protective plate.
Fig. 6-7: Protective plate for pipes/cables that cannot be
removed
1
Pipes/cables
2
Insulation for pipes
3
Protective plate
