Hoval 41-UltraOil 16, Installation Instructions Manual

Page: 19 / 36

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.
The UltraOil
®
can be operated either dependent on room
air or independent of room air.
Not dependent upon room air
As a unit of type C53 or C63, the UltraOil
®
can be set up
and operated independent of room air irrespective of the
size and ventilation of the room in which it is installed.
We recommend it is installed in a separate room in which,
in accordance with pr. EN 15035, a small amount of
leakage of flue gas can be tolerated.
Dependent on room air:
Ensure that there is an adequate fresh air supply to
the boiler room,
so that the amount of combustion air required for opera -
tion of all the burners installed there can be continuously
replenished without hindrance and that for the protection
of operating personnel there is no shortage of oxygen.
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, for up to a nomi -
nal heat output of 50 kW, a ventilation cross-section of at
least 300 cm
2
must be provided. In 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
4.2.1 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, resis -
tant 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 must be routed with an upward
slope (at least 50 mm per running metre) so that the
condensate that forms flows back into the boiler.
• 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.
• The cross-sections are to be calculated for heating boi -
lers without draughting requirements.
As a general rule, only one heat generator should
be connected to the chimney. When using two heat
generators, the corresponding regulations must be
observed.
The UltraOil
®
is equipped with a flue gas safety tem -
perature limiter. For this reason, no additional flue
gas temperature limiter is required for the flue gas
system with a maximum permitted flue gas tempe -
rature of 120 °C.
• A closable flue gas measurement nozzle with a circular
internal diameter of between 10-21 mm must be ins -
talled in the flue gas conduit. It must protrude beyond
the thermal insulation.
D
D
1D
< 2D
2xD
Fig. 35
The flue gas measurement nozzle or
flue gas measurement aperture must be
closed during regular operation of the
burner.
19 4 213 784 / 00
INSTALLATION