KWB Easyfire, Руководство по установке и обслуживанию

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© KWB – Kraft und Wärme aus Biomasse GmbH IM Easyfire 10/2008 Page 27
2 System installation 2 System installation
4.) Transport
The ash container can be conveniently pulled via the transport handle
or it can be carried via the side handles.
Use the reverse sequence to attach the ash container to the boiler
Transport, ash container
2.1.9 Smoke pipe connection and induced draft fan
As a general rule, the dimensions of the smoke-pipe connection between boiler and chimney should be identical to
the dimensions of the connection on the boiler. The chimney connection must be at least as high as the smoke-pipe
connection on the boiler. If not required by local regulations, we nonetheless recommend that a draft limiter and
a detonation damper be built into the smoke pipe or chimney flank and arranged in such a manner as to exclude
any danger of injury. Route the smoke pipe in such a manner that it is sealed and ascends slightly towards the
chimney, preferably with an inclination of less than 45°. The smoke pipe should be thermally insulated and feature
suitable easily accessible cleaning openings. The chimney connection should be 20 mm larger than the smoke-pipe
diameter. This makes it possible to integrate a suitable acoustic transmission decoupler between the smoke pipe
and the chimney. The KWB system has an induced-draft fan as standard equipment.
2.1.10 Water connection
For pellet boilers, the return-flow inlet temperature into the boiler must be at least 50 °C, otherwise there is an
increased risk of corrosion, which also has the effect of voiding the warranty. To increase the temperature of the
return flow boost, the boiler control unit can activate a mixing control unit or a mixing pump. For systems to 60 kW
the return flow boost can also be executed via a thermal control valve. Suitable fittings to increase the return flow
temperature are available from KWB. With the exception of return flow boost with mixing pump, the heating system
must feature a pressureless distribution system (switch, distributor, load-balancing tank , buffer, etc.) and a safety
group that complies with the relevant regulations (e.g. ÖNORM B 8130, or ÖNORM B 8131, DIN EN 4751 T1-4).
A load-balancing tank or buffer tank is not required, but it is useful in some cases; for instance if a solar heating
system or a unit load boiler is connected, or if there is a need to achieve a very low permanent heat output during
the summer months.
Components of acoustically-insulated water connections must be impermeable to oxygen, otherwise there is an
increased risk of corrosion, which also has the effect of voiding the warranty. If plastic pipes for underfloor heating
or district heating pipes are connected, it is necessary to integrate a limiting thermostat for the circulation pumps
to provide additional protection against excessive temperatures.
Boiler circuit pumps –
characteristic values
Min. required volume flow V / delivery head H RF mixer
Spread [K] via the boiler 10 15 20
Boiler output
[kW]
Min.-ø, forward
flowreturn flow
V
[m³/h]
H
[m]
V
[m³/h]
H
[m]
V
[m³/h]
H
[m]
KVS
[m³/h]
10 1” 0.86 0.12 0.57 0.05 0.43 0.03 6.5
15 1” 1.29 0.64 0.86 0.28 0.64 0.16 6.5
20 1” 1.72 1.16 1.15 0.51 0.86 0.29 6.5
25 5/4“ 2.15 0.72 1.43 0.32 1.07 0.18 6.5
30 5/4“ 2.58 1.00 1.72 0.44 1.29 0.25 6.5
Configuration data
for the boiler circuit The pump data applies for average local conditions and
must be checked by the installer or building equipment planner.
MA-Easyfire 10.2008_EN.indd 27 MA-Easyfire 10.2008_EN.indd 27 30.03.2009 13:29:59 Uhr 30.03.2009 13:29:59 Uhr