Ventilation - FULTON FHE-250 Installation, Operation & Maintenance Manual

2.12

VENTILATION

Adequate fresh, clean air is necessary for safe and efficient combustion, and should be provided at
high and low level in accordance with BS 6644 1991 and IGE/UP/10 Part 1 Communication 1676.
Note:
a) Ensure there is adequate ventilation in the boiler room. Lack of ventilation will create a high temperature and
cause control lockout.
b) Where mechanical ventilation is provided for plantrooms, ensure positive pressurisation of the space is
always maintained - hazardous interlock with the boiler may be required for this purpose.
c) Do not store chemicals such as perclorethylene in the boiler house, the fumes may damage the boiler and
flue and cause the burner to lock out on flame failure. The ventilation requirements of these boilers are
dependant on the type of flue system used, and their heat input. All vents must be permanent with no means
of closing, and positioned to avoid accidental
obstructions by blocking or flooding.
Detail reference should be made to BS. 6644 for inputs between 70 kW and 1.8 MW (net).
In IE refer to the current edition of I.S.820:2000. The following notes are for general guidance only:
Dust contamination in the combustion air may cause blockage of the burner slots. Unless the boiler room
provides a dust free environment then direct connection of the air intake via ducting to clean outside
air should be used.
IMPORTANT NOTE: If combustion air is drawn from within the boiler room, ensure no dust or airborne debris can
be ingested into the appliance. Dusty concrete flooring should be sealed to reduce the presence of dust.
The temperature within a boiler room shall not exceed 25°C within 100 mm of the floor, 32°C at mid
height and 40°C within 100 mm of the ceiling.
Open Flued Installations
If ventilation is to be provided by means of permanent high and low vents communicating direct with
outside air, then reference can be made to the sizes below. For other ventilation options refer to BS.
6644. In IE refer to the current edition of I.S.820.
Required area (cm
Low Level (Inlet)
High Level (Outlet)
Required area (cm
Low Level (Inlet)
High Level (Outlet)
Low Level (Inlet)
High Level (Outlet)
Note: Where a boiler installation is to operate in summer months (e.g. DHW), additional ventilation requirements
are stated within BS6644 if operating for more than 50% of the time.
) per kW of total rated input (net)
2
Boiler Room
4
2
)
2
FHE-250
1020.4
510.2
FHE-250
2551
1275.5
FHE-250 MANUAL 09 2014 ISSUE 2
Enclosure
Boiler Room
FHE-500 FHE-750
2040.8 3061.2
1020.4 1530.6
Enclosure
FHE-500 FHE-750
5102 7653
2551 3826.5
2
10
5
FHE-1000
4081.6
2040.8
FHE-1000
10204
5102
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