Viessmann VIESMANN VITOLIGNO 300-H Technical Manual page 56

Design information
7.8 Commissioning
Commissioning of a newly installed system may only be carried out by
Köb Holzheizsysteme GmbH, an authorised heating contractor or a
Viessmann Group engineer. Prior to commissioning, the system must
be filled with water, fuel must be stored for commissioning and the
installation must be checked through.
Fuel for commissioning
As the boiler system is cold and residual moisture is also extracted
from the refractory concrete during commissioning, the fuel for com-
missioning must be at least air dry. The first 3 hours of the heat-up
process should be carried with a low output. There should not be too
much fuel in the silo when the silo discharge function is tested. If there
is a fault, the discharge can quickly be cleared to remove the cause of
the fault. For commissioning, an amount of dry fuel (max. w 20 %)
adequate for approx. 10 - 24 full operating hours should be availa-
ble.
Charging the heating system
The heating system is first charged with raw water that has not been
chemically treated. This raw water must be filtered so it is free of sus-
pended solids. Particular attention must be paid to thorough venting
during charging. In the case of difficult water conditions (extreme hard-
ness, etc.) and/or large amounts of water, VDI guideline 2035 "Pre-
vention of damage through corrosion and scaling in hot water heating
systems" must be observed. Measures recommended by the guideline
for water treatment must be implemented.
7.9 Fuels
This boiler has been developed for processing dry fuels. This includes
conditioned fuels (high grade, homogeneous quality fuels). The com-
bustion system is suitable for the combustion of pellets and wood-
chips.
Suitable fuels
This boiler is approved for the following fuel types:
■ Woodchips up to a water content of 30 % (w30, G50)
■ Industrial pellets, with an ash content of up to 1.0 %
■ Pellets to EN 14961-2, class A1, with the DINplus quality seal or to
ÖNORM M 7135
Note
The following are unsuitable fuel types: Fossil fuels and those con-
taining sulphur, such as anthracite and coke, as well as plastics,
grain, straw, material soaked in flammable liquids and wood rem-
nants treated with plastics or wood preservatives.
7
7.10 Frost protection
Antifreeze suitable for heating systems can be added to the fill water.
The antifreeze manufacturer must verify its suitability, since otherwise
damage to gaskets and diaphragms can occur as well as noisy heating
operation. Köb accepts no liability for any resulting damage or conse-
quential losses.
7.11 Prevention of damage due to corrosion on the water side
The service life of any boiler as well as that of the complete heating
system is influenced by the quality of the water.
The cost of a water treatment facility is always going to be less than
that of repairing damage to your heating system.
VIESMANN
56
(cont.)
Amounts of fuel to be stored for commissioning:
Rated heating output
80 kW
99 kW
101 kW
Note
The charge pressure of the cold hydraulic seal should be approx.
0.1 bar (0.01 MPa) higher than the pre-charge pressure of the sealed
expansion vessel. However, it must not exceed a maximum of 3 bar
(0.3 MPa).
Note
Also refer to the information on fuels in chapter 1.
Observing the following requirements is necessary to safeguard your
warranty rights. The manufacturer's warranty excludes damage due to
corrosion and scaling.
The main water quality requirements are summarised below.
Amount
approx. 800 kg
VITOLIGNO 300-H