Hamworthy Sherborne Series, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
45
SHERBORNE 500001167/E
being undertaken.
High & low level ventilation grilles shall be positioned as high & as low as practicably possible. Low level grilles
should be located within 1 metre of the floor for Natural Gas & within 250mm of the floor for LPG. High level grilles
should be positioned within 15% of the boiler room height from the ceiling. High & low level grilles shall
communicate with the same room or space where compartment ventilation is used. Where grilles communicate
directly with outside air, they shall be positioned on the same wall.
Mechanical Ventilation Flow Rates
Flow rate per kW
total rated heat input (Net)
Inlet air
(Combustion venti-
lation)
Difference between
Inlet & Extract air *
m³/h. m³/h.
Volume 2.6 1.35
Note * : Where the associated air extraction is also by means of a fan, this shall be selected such as not to
cause a negative pressure to develop in the boiler house & to maintain the difference between inlet & extract
flow rates shown above.
The calculated extract flow rate is the actual inlet flow rate minus the appropriate figure in the table above.