Hamworthy Warmwell 120, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD WARMWELL 500001091/F
7.1 Air Supply by Natural Ventilation
The boiler room must have, or be provided with,
permanent air vents directly to the outside air, at
high level and at low level. For an exposed boiler
house, air vents should be fitted preferably on all
four sides, but at least on two sides. Air vents
should have negligible resistance and must not be
sited in any position where they are likely to be
easily blocked or flooded or in any position adjacent
to an extraction system which is carrying flammable
vapour. Grilles or louvres must be so designed that
high velocity air streams do not occur within the
space housing the boiler.
The air supplied for boiler house ventilation shall be
such that the maximum temperatures within the
boiler house shall be as follows: -
1) At or 100mm above floor level = 25°C.
2) At mid-level (1.5m above floor level) = 32°C.
3) At or 100mm below ceiling level) = 40°C.
Where both low and high level openings are used,
the grilles shall have a total minimum free area of: -
Low Level (inlet) 540cm
2
plus 4.5cm
2
per kilowatt in
excess of 60kW total rated input.
High Level (outlet) 270cm
2
plus 2.25cm
2
per kilowatt
in excess of 60kW total rated input.
7.2
Air Supply by Mechanical Ventilation
Air supplied to the boiler room by Mechanical means
should be as follows: -
1) Mechanical inlet and mechanical extract can be
utilised providing design extraction rate does not
exceed one third of the design inlet rate.
2) Mechanical extract ventilation with natural inlet
ventilation
MUST NOT be used.
NOTE: For Mechanical ventilation systems an
automatic control should be provided to cut off the
gas supply to the boiler, in the event of failure of air
flow in either inlet or extract fans.
Discharge piping from a tun-dish should be of a
synthetic material due to the mild acidity of the
condensate (pH 3-5). Consideration should be given
to possible freezing of condense water traps and
pipework. This must be avoided at all times. Insulate
condense pipes if freezing temperatures are likely to
be encountered.
6.5 Disconnection
Provisions should be made for disconnection of the
flue pipe for servicing. It is advisable that bends are
fitted with removable covers for inspection and
cleaning as appropriate.
NOTE! The flue system
must be self-supporting.
See section
13: SERVICING (p33) for further
information .
6.6 Flue Discharge
The flue system must ensure safe and efficient
operation of the boiler to which it is attached, protect
the combustion process from wind effects and
disperse the products of combustion to the external air.
The flue must terminate in a freely exposed position
and be so situated as to prevent the products of
combustion entering any opening in a building.
6.7 Surface Temperatures
Combustible materials in the vicinity of the boiler and
flue shall not exceed 65°C during boiler operation.
The flue shall not be closer than 50mm to any
combustible material, except where it passes through
such material with a non-combustible sleeve when
the air gap may not be less than 25mm.
6.8 Flue System Location
The flue system must not be placed or fitted where
there is undue risk of accidental damage to the flue
pipe or undue danger to persons in the vicinity.
NOTE! The flue MUST be self-supporting. Check
that the flue and chimney are clear from any
obstruction.
Where the flue diameter is less than 200mm (8") a
terminal must be fitted. Where the flue is of a larger
size consideration should be given to the fitting of a
flue discharge terminal or grill to stop ingress of birds,
etc.
7.0
AIR SUPPLY
Detailed recommendations for air supply are given in
BS 6644 . The following notes are intended to give
general guidance. In all cases there must be
provision for an adequate supply of air for both
combustion and general ventilation, in addition to that
required for any other appliance.
Figure 7.2 Mechanical Ventilation Flow Rates
Flow rate per 1000kW
total rated heat input (Gross)
Inlet air
(Combustion
ventilation)
Extract air
(ventilation)
m³/s. m³/s.
Volume 1.10 0.45
Atmospheric
Boilers
10