Ariterm Biomatic+ 20 - Operating Principles; Compact Design for Installation

ARITERM SWEDEN AB Installation, Operation & Maintenance - 2009.02.18- 5/32
Biomatic+ 20/30 the new generation pellet boiler is equipped with a 20/30 kW built-
in pellet burner. A pellet burner has many similarities with an oil burner. e dif-
ference is that heating with solid fuel produces ash that must be regularly removed to
prevent loss of eciency or impairment of burner performance. e boiler is designed
to meet highest requirements as to operational reliability, convenience, and safety.
Biomatic+ 20/30 belongs to the most ecient state-of-the art pellet boilers in today’s
marketplace. Optimal combustion eciency and good insulation allows for a high
coecient of performance while emissions to the environment are kept at a low level.
e boiler has automatic ignition but can always be ignited manually, if required. It
has two ignition programs depending on whether the burner is started from the OFF
position or from operating mode. Operation of the boiler and its feed system are fully
automated and are regulated in three steps by the built-in control system. In the burn
pot, pellets are mixed with air to the ideal proportion to ensure complete combustion
in a cost eective manner.
Biomatic+ 20/30 are equipped with an oversized
ash box to facilitate maintenance work. Sweeping is mainly done from the soot-hatch
on top of the boiler but also through the rebox door after the burner is pulled out.
Biomatic+ 20/30 consists of a combustion
chamber with ue pipes enclosed by a jacket
holding 140/142 litres of water. Heat generated by
the burner is transferred to the boiler water via
the combustion chamber and the ue pipes.
Heat for the radiator system is transferred via a
4-way shunt valve. In the shunt valve the boiler
water is mixed with return water from the radiators
so that a constant, correct temperature can be
maintained in the radiators in relation to the outdoor
temperature. is is a means to achieve better
heating economy.
Small dimensions for easy installation
anks to its modest dimensions Biomatic+ 20/30 can be installed in boiler rooms
that would normally be considered too small. Most of the piping connections are
placed on top of the boiler. e terminal block for electric installation is accessible
from the control panel. Service work is facilitated by the fact that all connections and
components are easily accessible from the front. Sweeping takes place through the
rebox door or through a cleaning hatch on top of the boiler. Ashes collect in the oversi-
zed ash box that is attached to the ash door. e ash box holds 50 litre of ash and is
emptied when necessary.
Hot tap water
e ecient plate heat exchanger will ensure that you always get “fresh” hot tap water.
A strainer has been installed in the cold water line to prevent the heat exchanger from
becoming clogged (the water quality should be checked).
e internal circulation pump is controlled by a ow switch, tted on the hot water
outlet pipe. e whole heat-exchanger package is located behind the electric panel and
is easily accessible for service work.
ATTENTION! Before servicing, disconnect the power to the boiler by switching off the
mains switches. Work on the boiler may only be carried out by a qualied electrician.
Front view of the heat exchanger
installation for hot tap water.
1. Plate heat exchanger
2. Internal circulation pump
OPERATING PRINCIPLE
e shunt valve can be regulated either manually or
automatically with a regulating device (optional).
1
Flow switch
cw hw
Strainer
2