Wolf COB-2 - Air;Flue Gas Routing

Planning
3066501_201910 WOLF GmbH | 19
Permitted negative pressure
The maximum permitted negative pressure in the suction line is 0.3 bar.
Anti-lift valve
With negative pressure controlled anti-lift valves, the negative pressure on the inlet side is increased
considerably. The maximum permitted negative pressure is exceeded. Use an electromagnetically
controlled anti-lift valve to prevent a heat generator fault. This prevents the outgassing of the oil.
4.4.2 Fuel requirements
i
Use low sulphur fuel oil or bio-oil to protect the environment.
Requirement Explanation
Minimum temperature 5 °C, install trace heating to external tank if necessary
Permissible bio-oil
percentages
Up to 10% alternative share –B10– in accordance with DIN V 51603-6
Bio-oil quality EN 14213 at the time that the tank is lled
Bio-oils storage tank Written conrmation from the manufacturer specifying the maximum
permissible FAME (fatty acid methyl ester) proportion
Accessories, e.g. tank ttings, gaskets, lters and oil lines must also be
suitable.
Cleaning the bio-oil tank FAME acts as a solvent in the tank and the oil lines.
For this reason, clean the tank before lling with bio-oil.
Bio-oil storage Bio-oil is a natural product with a shorter shelf life than EL fuel oil.
Bio-oil must 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.
Table 4.6 Fuel requirements
4.5 Condensate drain
If the condensate is fed directly into the on-site drain:
– Use a exible hose to connect the trap to the on-site drain. Make sure that the incline is sufcient
(drainage height of condensate from trap 260 mm)
– Use a condensate pump if this incline cannot be achieved.
– Make sure that the ventilation is sufcient to avoid the drain pipe affecting the heat generator.
Sulphur content of fuel oil Neutralisation of the condensate
> 50 mg/kg Required
< 50 mg/kg This can be omitted after discussing the matter with the local water
authority
Table 4.7 Neutralisation of the condensate
If neutralisation of the condensate is omitted:
– The condensate may only be drained in drain lines in accordance with Code of Practice DWA-A251.
– Mix the condensate with sufcient domestic waste water (at least 20 times the volume of the expected
amount of condensate).
– If this is not possible, neutralisation is required.
4.6 Air/uegasrouting
For safety reasons, use only original WOLF ues and concentric balanced ue systems.
DANGER
Fireandsmokewilltraveltootheroors!
Risk of suffocation, poisoning and burning in the event of exposure to re from outside.
► Take precautions to ensure re resistance.