Flue Terminal Position; Minimum Clearances - Morco 24CPM User Instructions And Installation Manual

4.2 FLUE TERMINAL POSITION
• The boiler MUST be installed so that the terminal is exposed to the external
air.
• It is important that the position of the terminal allows free passage of air
across it at all times.
• Where the terminal is fitted in a position to which children, the elderly, or
disabled people have access (less than 1.5m above steps, decking or ground),
a suitable terminal guard should be fitted.
• In certain weather conditions the terminal may emit a plume of steam.
• It is ESSENTIAL TO ENSURE, that products of combustion discharging from
the terminal cannot re-enter the building, or vehicle, through ventilators,
windows, or other sources of natural air infiltration, such as other flues etc, with
the exception of doors, but not the opening windows thereof.
• The minimum acceptable dimensions from the terminal to obstructions and
ventilation openings is as follows:
Directly below an opening fixed vent, windows, etc. 300mm
Adjacent to an opening fixed vent, windows, etc. 300mm
Below gutters 75mm
Below eaves 200mm
From a vertical drain pipe or soil pipe 75mm
From an internal or external corner 300mm
Vertically from a terminal on the same wall 1500mm
Horizontally from a terminal on the same wall 300mm
For domestic and Park Home applications please refer to BS5440.
4.3 MINIMUM CLEARANCES
• Minimum clearances of 25mm on each side and the front of the boiler must be
observed. However full access from the front in the form of an opening door,
must be given to allow access to the controls and for servicing.
• 200mm above the top of the boiler case is required for the flue assembly.
• 300mm is required below the boiler to allow easy access to the gas isolation
cock and filling loop.
• If the boiler is to be installed into a small cupboard or compartment (i.e. at the
minimum clearances) and overheating can be foreseen (i.e. close proximity
to another heat source such as a cooker or fire) it is recommended that
ventilation be installed in the cupboard for cooling. The following table gives
the minimum effective areas of the vents:
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