Air Supply - andrews RFF190 Installation Manual, Operation And Service Manual

INSTALLATION
Detailed recommendations for air supply are given in BS 5440 part 2.
The following notes are intended to give general guidance:
Where the heater is to be installed in a room or internal space the heater requires the
room or internal space containing it to have a permanent air vent. The vent must be
either direct to outside air or to an adjacent room or internal space which must itself have
a permanent vent of at least the same size direct to outside air. The minimum effective
area of the permanent air vent(s) required is as follows:
Where the heater is to be installed in a compartment, permanent air vents are required in
the compartment at high and low level. These air vents must either communicate with a
room or internal space or be direct to outside air.
The minimum effective areas of the permanent air vents required in the compartment are
as follows:-
Position of
Air Vents
High Level
Low level
Size
a
b
2
5 cm per kW in excess of 7 kW
Air Vent Areas
Air from room or
internal space
2
10 cm per kW
2
20cm per kW
RFF190 RFF280
8m 5m
7m 4m
(b Max)
Air direct from
outside
2
5cm per kW
2
10cm per kW
SECTION 3
FLUE SYSTEM
0.3m
Fig 2.
Typical Flue
Installation

AIR SUPPLY

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