Viessmann VIESMANN VITOLIGNO 300-H Technical Manual page 48

Fuel storage
(cont.)
Storing fuel in a pellet silo
For pellet silos, see Vitoset pricelist
Benefits:
■ Flexible siting
■ Quick, easy installation
■ Completely dustproof
■ Discharge system freely accessible for maintenance work
Sizing the pellet silo
Where possible, size the pellet silo so that enough pellets can be
stored to cover the annual fuel demand.
The storage volume required to cover the annual fuel demand in m
calculated by multiplying the building heat load (in kW) by a factor of
3
0.6 (m /kW).
The annual fuel demand in t is calculated by further multiplication with
3
factor 0.65 (t/m ).
Example:
Heat load of the building = 12 kW
d
400
Pellet silo for vacuum system
Type Dimension in mm
12
17
6
21
25
29
17/29
21/29
Silo types 17/29 and 21/29 can be filled from the long side (connector clearance d = 900 mm) as well as from the narrow side (connector clearance
d = 500 mm).
Note
Filling from the narrow side of the room is recommended to achieve
the specified storage capacity.
On-site requirements of the installation room
For storage room requirements, see page 42.
The pellet silo can be installed in any suitable room in the cellar, in an
upper floor or attic. The variable container height enables an optimum
utilisation of the available space. For installation purposes, the instal-
lation room needs to be 100 mm wider than the pellet silo. There must
be no pointed or sharp objects inside the installation room, otherwise
the fabric of the pellet silo can be damaged. The fabric must not come
into contact with damp walls, must not rub against walls or be exposed
to direct sunlight.
VIESMANN
48
a b
1200 1200 1800
1700 1700 1800
2100 2100 1800
2500 2500 1800
2900 2900 1900
1700 2900 1900
2100 2900 1900
3
12 kW x 0.6 (m /kW) = 7.2 m
7.2 m 3 x 0.65 (t/m
Required pellet silo: Type 21 (selection from the following table)
Pellet silo (adjustable height)
As composite textile/metal construction, delivered in parts
Standard delivery:
■ Zinc-plated steel frame, height adjustable
■ Zinc-plated steel cone
■ Pellet silo made from anti-static synthetic fabric
3 is
■ Installation material
■ Filling system with retainer, Storz-A couplings, caps and clamps
Discharge unit to be ordered separately (page 50).
a
c c
min max
2500 500
2500 500
2500 500
2500 900
2500 900
2500 500/900
2500 500/900
Siting outdoors requires a weather-proof enclosure.
The load-bearing capacity of the substrate must be assured in accord-
ance with the details in the following diagrams. Particularly with "float-
ing" screeds (unfinished concrete + insulation layer + screed), there is
a risk that they may not meet the specified requirements.
Secure the pellet silo to its support surface.
3
3 ) = 4.68 t
Storage volume in t at
d c c
min max
1.1 1.7
2.1 3.2
2.8 4.7
4.8 6.7
6.0 9.0
3.6 5.4
3.8 6.1
VITOLIGNO 300-H
Part no.
7419 155
7419 156
7419 157
7419 158
7419 159
7419 161
7419 162