KWB Easyfire, Руководство по установке и обслуживанию, Страница: 10 / 220

Page 10 IM Easyfire 10/2008 © KWB – Kraft und Wärme aus Biomasse GmbH
1 Introduction 1 Introduction
Clear door widths for bringing in the boiler, in cm, width x height
Boiler type Dismantled Not dismantled
Easyfire USP 10/15/20 75 x 180 85 x 180
Easyfire USP 25/30 80 x 180 95 x 180
1.3.2 General requirements for pellet storage rooms
The constructional on-site requirements for the boiler
room also apply to the fuel storage room. If it is possible
to store a volume of 50 m³ or more of fuel, then a fire
extinguisher with manual release with a frost-proof
connection (from the boiler room) must be connected
to a pressurised water line executed as empty piping
of at least 3/4” or DN 20, must be installed directly
above the passage of the fuel extractor trough in the
fuel storage room The armature must be marked with
the warning: “Fire extinguisher – fuel storage room”. If
a pumping car is used to fill the fuel storage room with
wood chips or pellets, it is necessary to install hose
couplings and pipelines (that must be earthed). These
are available from KWB. If this filling method is selected, dustproof sealing of the fuel storage room is required.
The escaping air is removed through a second earthed
pipeline and hose coupling, or it is blown off into the
open air after having passed through a filtering section.
Suction removal or filtration of the transport air is the
responsibility of the fuel supplier. The walls, windows
and doors must withstand the excess pressure that
occurs during the filling process. Wood planking is
necessary on the inside in order to open the door when
the pellet storage room is full. The fuel storage area
must be designed in such a manner that it is dry and
dust-proof! Specific requirements for the fuel extractor
variants are provided in section 10.
Ignition sources (lights, switches, power outlets and distributor boxes) are prohibited!
Electrical installations must be established in explosion-protected design in accordance
with the local applicable regulations.
Rule of thumb for dimensioning the storage room:
(*Average variables: Weather, detached house, fuel quality)
Fuel Pellets 10 % water content 6 mm diameter
Storage space for 1 year = 0.9 m³ heat load in kW
Consumption for 1 year = 400 kg heat load in kW
1.3.3 Chimney requirements
Due to the high boiler efficiency, the chimney design should
be resistant to moisture. A moisture-resistant chimney
design means that there will be no moisture penetration
or damage to the brickwork, even though the temperature
level in the flue-gas path remains permanently below the
flue-gas dew point (see DIN 18160)!
Exceptions are only possible if the flue gas temperature is
increased due to interventions in the device. However boiler
efficiency is reduced through such a measure. The guide
values for chimney diameter are specified in the technical
data (see operating manual, point 8). They are valid for
the applicable system size, given average constructional
conditions, i.e.: Effective chimney height 8 - 10 m, smoke-
pipe length 1.5 m, 2 90° segment bends, 1 contraction,
1 T-connection at 90°. The cross-section diagrams provided
by the chimney manufacturer are a quick reference aid, if the circumstances are not less favourable than the conditions
specified in the cross-section diagrams. If conditions differ,
or if conditions are less favourable in terms of space, it is
necessary to execute a chimney calculation in accordance
with EN 13384. The boiler parameters required for the
calculation are specified in the technical boiler data. A data
entry sheet is available as an electronic form from KWB
(section 17). Upon request, KWB will provide the chimney
calculation based on the information provided on the form.
This is a chargeable service. The local expert for these
issues is your responsible chimney sweep. It is advisable
to involve the chimney sweep during the planning phase
as he is the one who will have to issue the acceptance
certificate for the flue gas system.
MA-Easyfire 10.2008_EN.indd 10 MA-Easyfire 10.2008_EN.indd 10 30.03.2009 13:29:43 Uhr 30.03.2009 13:29:43 Uhr