Wolf COB Installation Instructions And Technical Manual page 13

Information from VDI 2035
The method of commissioning in particular can affect scaling.
Heat the system with burner stage 1 with an even and adequate
throughput.
Before commissioning, all hydraulic pipes must undergo a
tightness test:
Test pressure on heating water side max. 4 bar
Prior to testing, close the shut-off valves in the heating circuit for
the appliance, because otherwise, the safety valve (accessory)
opens at 3 bar. The appliance has already been tested at the
factory for tightness at 4.5 bar.
If the appliance is not watertight, there is a risk of leaks and
resulting material losses.
The maximum flow rate must not exceed 6 000 l/h (100 l/min).
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8. Installation - general notes
We highly recommend that you use low sulphur fuel oil
to protect the environment.
Information on the use of bio-oil blends:
1. Permissible bio-oil percentages
The COB (from date of manufacture May 2010) can be
operated with fuel oil with up to 10 % alternative constituents
–B10- to DIN V 51603-6.
2. Bio-oil quality
The bio-oil must comply with EN 14213 when the customer
tank is filled.
3. Oil storage tanks
The customer must obtain written confirmation from the
manufacturer or supplier regarding the suitability of the tank
for the use of bio-oils, giving the maximum permitted FAME
percentage. It must be ensured that the tank fittings, gaskets,
filters and oil pipes are also suitable for bio oil.
4. Cleaning the tank
FAME acts as a solvent, removing all deposits and residues in
the tank and the oil lines. Wolf therefore always recommends
cleaning the tank before filling it with bio-oil.
5. Storing bio-oils
Bio-oil is a natural product with a lower shelf life than fuel
oil EL. Bio-oil must therefore be stored at low temperatures
(ambient temperature between 5 °C and 20 °C) and protected
from exposure to direct sunlight (in the case of plastic tanks
in particular).
Up-to-date information indicates that bio-oil should not be stored
for longer than one year, but the mineral oil industry is currently
searching for suitable additives to increase the shelf life.
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