Hoval UltraOil 65, Техническая информация Инструкции по установке

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4. Installation
4.1 Boiler room requirements
Regarding the building specifications in respect of boiler
rooms and their ventilation and exhaust, the current build -
ing supervisory office regulations specific to the state or
country are to be observed.
Make sure there is an adequate fresh air supply
to the boiler room,
so that the necessary combustion air for all the burners
operating can flow into the boiler room to protect the op-
er ator(s) against any shortage of oxygen.
Binding values for the size of ventilation openings are
generally not specified in the respective regulations; it
is normally only required that no greater under-pressure
than 3 N/m
2
can occur in the boiler room. To comply with
this requirement, it is required to provide a ventilation
cross-section of at least 300 cm
2
for a nominal heat out -
put of up to 50 kW. For rectangular openings, the ratio of
the side should not exceed 1,5:1; if covered with a grille,
an appropriate allowance must be made to ensure that
the free cross-section attains the values specified above.
4.2 Flue connection and chimney
§
The exhaust system must be gastight, water -
tight, resistant to acids and be approved for
the corresponding exhaust gas temperatures
up to 120 °C and for operation at pressure.
Horizontal connections must be laid with a
gra di ent down towards the boiler of at least
50 mm per meter length, to ensure that there
is no hindrance to condensate flowing back in-
to the boiler. The whole exhaust system must
be designed to avoid condensate collecting.
As a general rule, only one heat generator
should be connected to the chimney. For two
heat generators, the corresponding regula -
tions are to be observed.
In the UltraOil
®
there is an exhaust gas safety
tem perature limiter installed. For this reason,
no ad di tional exhaust gas temperature limiter
is re quir ed for the exhaust gas system with a
ma xi mum permitted exhaust gas temperature
of 120 °C.
Because of the moisture content in exhaust gases at low
temperatures and the additional condensate which is thus
caused in the chimney, it is not permitted to connect con -
densing oil-fired boilers to traditional domestic chimneys.
The current official conditions and regulations are to be
ob served in respect of the exhaust gas system design.
There are two alternatives for exhaust gas system design
for condensing oil-fired boilers:
a) the use of special exhaust gas systems appro­
ved by the building authorities,
b) the use of moisture­resistant chimneys which
are approved for exhaust gas temperatures of
over 40 °C, connected in the boiler installa­
tion room by means of approved exhaust
flues with the condensing oil-fired boiler.
In both cases, the cross-sections and maximum lengths
are to be calculated on the basis of the values for exhaust
gas mass flow, exhaust gas temperature and the delivery
pressure available at the exhaust connections in accord -
ance with the table in section 3.2 (EN 13384).
4 213 787 / 01
InSTALLATIOn