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INSTALLATION
4.
Installation
4.1
Boiler room requirements
Regarding the building specifications for boiler rooms
and their supply and extract air handling, the current buil-
ding supervisory office regulations specific to the state or
country are to be observed.
Ensure an adequate supply of fresh air to the boiler room
to
make sure that there is an unobstructed flow of the com
-
bustion air required for the operation of all combustion
devices in the boiler room and so that there is no shorta-
ge of oxygen for operating personnel.
Binding values for the size of supply air openings are not
generally specified in the relevant regulations; it is me
-
rely required that no partial vacuum in excess of 3 N/
m
2
occurs. To comply with this requirement, a supply air
cross-section of 300 cm
2
is to be provided up to a no-
minal heat output of 50 kW. In the case of rectangular
openings, the ratio of the sides should not exceed 1.5:1;
if a grid is fitted, an appropriate allowance must be added
so that the free cross-section area reaches the amount
given above.
4.2
Flue gas connection and chimney
NOTICE
The flue gas system must be gastight, wa
-
tertight, resistant to acids and approved for
use with the corresponding flue gas tempe
-
ratures of up to 120 °C and for overpressure.
NOTICE
Horizontal connection lines must be routed
with a downward slope of at least 50 mm per
running metre of their length in the direction
of the boiler to ensure that condensate can
flow unhindered back to the boiler. The whole
flue gas system must be designed to prevent
condensate collecting.
!
WARNING
As a rule, only one heat generator should
be connected to the chimney! If using two
heat generators, observe the corresponding
regulations.
The UltraOil
®
is delivered with a flue gas
safety temperature limiter. For this reason, no
additional flue gas safety temperature limiter
is required for flue gas systems with a max.
permissible flue gas temperature of 120 °C.
As a result of the water vapour in the flue gas and the low
flue gas temperature, condensate forms in the chimney.
This means that oil condensing boilers cannot be connec-
ted to conventional domestic chimneys.
The valid official stipulations and regulations with regard
to flue gas evacuation must be observed.
There are two possible ways to evacuate flue gas from oil
condensing boilers:
a)
the use of special flue gas conduits approved
by the building authorities,
b)
the use of moisture-resistant chimneys which
are approved for flue gas temperatures of
over 40 °C, connected to the oil condensing
boiler in the boiler installation room by means
of approved flue gas conduits.
In both cases, the cross-sections and maximum lengths
must be calculated on the basis of the flue gas mass flow,
flue gas temperature and available maximum delivery
pressure at the flue gas outlet in accordance with the ta
-
ble in section 3.2 (EN 13384).
4.3.1 Flue gas conduits approved under building
law
Only flue gas systems approved by the respective coun
-
try or state may be connected (in Austria the approval
requirements of the respective provinces must be obser-
ved). The manufacturers of the flue gas conduits supply
suitable boiler connection fittings for the transition from
the flue gas outlet to the flue gas conduit.
When designing and installing flue gas conduits, manu
-
facturer’s instructions for design and routing and the re-
quirements of building law must be observed. We recom-
mend that you consult the regional chimney inspector in
good time.
4.3.2 Project planning instructions
-
The flue gas must be routed through a tested and
approved flue gas conduit
-
The flue gas conduit must be gastight, watertight, re
-
sistant to corrosion and acids and approved for use with
flue gas temperatures of up to 120 °C.
-
The flue gas system must be suitable for operation at
pressure.
-
The flue gas conduit is to be laid with gradients to en
-
sure that the condensate which occurs in the flue gas
system flows back into the heating boiler and can be
neutralised there before discharge into the drainage
system.
-
When using flue gas conduits made from plastic, ob
-
serve the country-specific regulations with regard to the
use of the flue gas safety temperature limiter. (Included
in the scope of delivery of the UltraOil
®
)
- The cross-sections are to be calculated for heating boi-
lers without draughting requirements. Please take note
of SIA recommendation No. 384/4 “Chimneys for buil-
ding heating systems, determination of cross-sections.”
-
A closable flue gas measurement nozzle with a circular
internal diameter of between 10-21 mm must be instal-
led in the flue gas conduit. It must protrude beyond the
thermal insulation.
2 x D
D
D
1D
< 2D
Fig. 20
Содержание 42-UltraOil 110
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