Feed And Return Air Hose; Filling Adaptor And Return Air Adaptor; Earthing - Viessmann Vitolig
200 Technical Manual

Feed and return air hose

H The maximum length in one direction
(feed or return air) should not be
greater than 15 m; the height from the
furthest suction wand to the feed unit
should not be greater than 2.8 m.
H Hoses should not be kinked and radii
should not be tighter than 30 cm.
H Hoses should be routed as straight and
level as possible. If hoses are routed
several times up and down, pellets will
not be perfectly transported from the
lower lying areas.

Filling adaptor and return air adaptor

H General
Arrange the adaptors so that, during
the filling process, no overpressure is
created in the pellet storage area.
Therefore, keep the return air adaptor
unrestricted, even when the maximum
filling level in the storage area has been
reached (see page 13).
The adaptors should be located as high
as possible inside the storage area, to
H Earthing
Earth all adaptors to prevent static
building up during the filling process.
Generally, the connection of each pipe
element to the building earth is
H Select the shortest possible way from
the storage area to the feeder unit and
route hoses, positioning than so that no
one can step onto them. However,
hoses should be long enough to enable
all to be connected to any position of
the changeover unit. This is necessary
to allow the pellet feed hose to be
purged with return air, if necessary.
H Hoses must be earthed to prevent static
being built up during pellet handling.
H The pellet feed hose should be made
from one piece, whilst the return air
hose can be made from several
sections. The connection fitting should
be made from metal to ensure the earth
continuity.
enable the pellet storage area to be
filled to the maximum. The filling
adaptor should be at least 20 cm below
the ceiling, to prevent pellets hitting the
ceiling (fit protective boards if the
ceiling is plastered).
The adaptors should be located along
the narrow side of the storage room.
Pellets are blown approx. 4 5 m with
recommended. At the very least,
connect each pipe element to the
brickwork, either by setting the pipe
3 Vitolig 300
H The hoses should not be exposed to
temperatures above 60 ºC (these could,
for example, be created by non−
insulated heating pipes and at the flue
pipe).
H Hoses should not be routed outside
(danger of becoming brittle through UV
radiation).
H To calculate the required length of hose,
the distance between the feeder unit
and the changeover unit as well as the
distances between the changeover unit
and all three suction wands must be
established. These dimensions are
added and multiplied by two, since
pellet feed and return air hoses are
required.
straight filling adaptors. Where a 90 º
elbow fitting is located before the entry
into the storage room, fit a straight pipe
of at least 1 m length on the other side
to protrude into the storage room. This
enables the pellets to reach the required
velocity and therefore the necessary
blow−in distance.
into the brickwork (without insulating
material) or via pipe cleats set into the
brickwork.
15