Hamworthy PUREWELL VariHeat he, Инструкция по установке, пусконаладке и обслуживанию

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HAMWORTHY HEATING LTD
47
PUREWELL VariHeat he 500001155/F
Figure D1 Mechanical Ventilation Flow Rates
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 and to maintain the difference between inlet and
extract flow rates shown above.
The calculated extract flow rate is the actual inlet flow rate minus the appropriate figure in the table above.
D 1.5. General Requirements
The air supply should be free from contamination such as building dust and insulation fibres from lagging. To
avoid unnecessary cleaning and servicing of the boiler modules, the boilers should not be fired whilst building
work is being undertaken.
High and low level ventilation grilles shall be positioned as high and as low as practicably possible. Low level
grilles should be located within 1 metre of the floor for Natural Gas and within 250mm of the floor for LPG. High
level grilles should be positioned within 15% of the boiler room height from the ceiling. High and 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.
Flow rate per kW total
rated heat input (net)
Inlet air
(Combustion
ventilation)
Difference between
inlet and extract air
(Inlet minus extract
ventilation)
m³/h m³/h
2.6 1.35 +/- 0.18
Boilers
Without
Draught
Diverters