Hoval Max-3 plus Series, Техническая информация и инструкции по сборке

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INSTALLATION
•
radius bends without horizontal runs before entering the
main chimney at a 45° are recommended and will cau-
se the least resistance.
• Flues should not be less in diameter than the boiler out-
let connection size.
•
should provide a negative pressure condition at the boi-
•
should be positioned to cause the least disturbance to
the other gas stream (i.e. not opposite to each other).
•
at the point of intersection with the header.
• Header cross sectional areas should take account of
-
sation should be drained at the base of the vertical run.
Horizontal runs should drain away from the boiler.
• Steps should be taken in designing to prevent or minimi-
se condensation forming by using double skin and/or
ck or double skin steel chimney. This helps prevent
• Where high gas outlet velocities are required from the
chimney, a coned outlet can be used. The additional
loss of draught due to this should be taken into account
in the chimney design.
• Flues should be supported independently to prevent
undue weight and forces due to expansion being trans-
mitted to the boiler outlet connection.
• -
neys for cleaning and inspection purposes. Square tees
the burner.
i
IMPORTANT
A condensate drain point is provided in
be piped to drain via a drain trap to pre-
for further details.
4.3.2 Fan Dilution Systems - General Guidelines
In circumstances where the provision of a conventional or
-
tion of the boiler plant, a fan dilution system may be used.
Dilution fan capacity (m
3
/s) =
9.7 × boiler rating (kW)
3600 × 0.8
at normal
temperature and
pressure (N.T.P)
To adjust for the normal diluted outlet temperature of
50°
The dilution air intake should be independent of the boi-
lerhouse combustion and ventilation air supply.
Velocities in the fan intake and exit ducts should not ex-
ceed 7.5 l/s to avoid ductwork resonance noise.
is generally required.
Attention is also drawn to the need to include the fan and
its proving switches as in the normal routine boiler main-
tenance programme.
Chimney sizes and height will need to take into ac-
count the following:
1. Clean Air Act.
2. Local
Regulations.
3. Environmental Protection Act 1990.
4. Considerations to adjacent buildings.
5. Transmission of noise, particularly low frequency
sound pressure levels in quiet periods of the day
very close.
6. Flue gases discharged to the atmosphere which co-
ntribute to health dangers should be minimised by
maintaining the burner and boiler to ensure correct
time to a minimum and to maintain low levels of
CO2 (Greenhouse effect); CO and NOx ( d a n g e
r o u s g a s e s ) . C u r r e n t regulations for NOx
limits (1993) are maximum 260 mg/kWh (148ppm
at 0% O2). Burners supplied with Hoval boilers fully
meet this requirement.
i
IMPORTANT
A condensate trap must also be fitted on
the boiler flue outlet to prevent condensa-
te entering the boiler.
insulated flue systems and suitable insulated brick sta-
ler flue outlet of 50 pascals.