Operation Manual

6 | Product description
Stainless Steel Condensing Boiler - SB625WS / SB745WS6 720 805 220 (2012/10)
For the correct use and treatment of the fill and make-up water, the
contents of the following table MUST be observed.
2.5 The correct fuel
To ensure it operates properly, the heating system requires fuel of the
correct type and grade.
2.6 Combustion Air Quality
▶ Keep the supply of combustion air free of corrosive substances (e.g.
halogenated hydrocarbons that contain chlorine or fluorine
compounds).
This will help prevent corrosion.
▶ Never use or store chlorinated cleaning agents or halogenated
hydrocarbons (as contained in spray cans, solvents or cleaning
agents, paints and adhesives, for example) in the boiler room.
▶ Keep the combustion air supply free of dust.
▶ If building work is taking place in the installation room and creating a
lot of dust, shut the boiler down.
▶ A burner contaminated during building work must be cleaned before
commissioning.
Parameters Unit of measure Heating water
pH 7.5- 9,5
Hardness ppm < 50
Electrical conductivity s/cm <100
Chlorides mg/l <10
Sulphides mg/l <10
Nitrides mg/l <10
Oxygen in solution mg/l –
Iron (Fe) mg/l <0.5
Table 2 Requirements of heating system water
NOTICE: Risk of system damage from use of incorrect
fuel.
▶ Only use the fuel specified. The correct fuel is entered
in  Tab. 3 by the heating contractor.
Consult your system installer if you intend on changing
the fuel for your system.
NOTICE: Risk due to oil leaks
▶ When using oil as the fuel, national regulations hold
the operator responsible for immediately calling a
specialist contractor to remedy oil leaks the moment
they are discovered.
Use the following fuel:
Stamp/Signature/Date
Table 3 Fuel to be used (entered by heating system installer)