Strebel 40S-70, Installation Manual

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Any existing chimney must be clear of obstruction and have been swept clean immediately before
installation of the lining system. Where the chimney is believed to have previously served an open fire
installation it is possible that the higher flue gas temperature from a closed appliance may loosen
deposits that were previously firmly adhered, with the consequent risk of flue blockage. It is therefore
recommended that the chimney be swept a second time within a month of regular use after installation.
If there is no existing chimney then any new system must be to the designation described above
and in accordance with Building Regulations Approved Document J.
A single wall metal fluepipe is suitable for connecting the boiler to the chimney but is not
suitable for use as the complete chimney. The chimney and connecting fluepipe must have a
minimum diameter of 150 mm and its dimension should be not less than the size of the outlet
socket of the boiler.
Any bend in the chimney or connecting fluepipe should not exceed 45

. 90

bends should not be used.
Combustible material should not be located where the heat dissipating through the walls of fireplaces or
flues could ignite it. Therefore when installing the boiler in the presence of combustible materials due
account must be taken of the guidance on the separation of combustible material given in Building
Regulations Approved Document J and also in these boiler instructions.