Hamworthy STRATTON MK3 Series, Installation, Commissioning And Servicing Instructions

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26 / 154
STRATTON MK3 - Installation, Use and Maintenance
00U07428680-C
4.3.2. Connection to a B23 chimney
B23 type connection:
Air from the installation premises, gas evacuation through the roof via a
natural draft pipe.
IMPORTANT:
Check that the boiler installation premises have high and low
ventilation, that it conforms to current regulations and that it is not
obstructed.
For the STRATTON MK3 40-70 , the use of the
ø
130 Chimney Adaptor
accessory is mandatory to connect the boiler to a B23 chimney duct. This kit
is suitable for Ø130 external ducts.
For the STRATTON MK3 80-150 , the use of the
ø
150 Chimney Adaptor
accessory is mandatory to connect the boiler to a B23 chimney duct. This kit
is suitable for Ø 150 external ducts.
IMPORTANT:
Under no circumstances is use of these mandatory accessories a
substitute for checking the dimensioning of the chimney ducts (given
a combustion gas pressure at the boiler outlet equal to 0 Pa).
STRATTON MK3 boilers are high performance boilers with very low exhaust
temperatures; consequently to retain a favourable draft the ducts must run
upwards from the boiler outlet.
Horizontal duct runs must be avoided so as to limit condensate retention. To
do this use a minimum slope of 3 % (30 mm for each 1m length) towards the
boiler in the horizontal parts.
WARNING:
If several boilers are connected to one flue, check by calculation that
the flue is not pressurised when all the boilers are operating at Qn.