Safety
General information
13
5
Safety
5.1
General information
Operation only by trained personnel
The product may be operated by trained adults only.
Training may be provided by the heating technician or
our customer service. Please read the associated doc-
umentation carefully in order to avoid errors during
operation and maintenance.
Persons who lack experience and knowledge as well
as children may not operate, clean, or maintain the
product.
Keep fire extinguishers in a clearly visible location
In Austria, the minimum requirement is an ABC
powder extinguisher with 6 kg. An AB foam extinguish-
er with 9 litres, which produces less damage when
used, is preferable. The fire extinguisher should be
kept outside the boiler room, visible and easily
accessible.
In Germany and Switzerland, fire extinguishers are not
required for heating systems in private residences. In
spite of this, we recommend having one in the house.
Storage of ash
The ash must be kept in non-flammable containers
with covers. Do not put hot ash in the waste bin due to
risk of fire.
5.2
Safety devices
Pump safety run, automatic heat dissipation at
overtemperature
If the boiler temperature exceeds 87 °C (factory
setting) for any reason, the pump safety run will start.
All heating pumps and boiler pumps that are
connected to the boiler control system are switched on
to dissipate heat from the boiler.
This action prevents the boiler temperature from rising
further and triggering further safety devices such as
the safety temperature limiter and the thermal relief
valve.
Heat dissipation is limited by the selected
maximum flow temperature in the heating circuits
and the target hot water temperature.
Boiler overheating
If a boiler temperature of 90°C is reached, the control
system switches the draught fan off and a warning
message appears on the display.
Reasons for a boiler temperature increase include:
•
too much wood in the fuel chamber
•
heating circuits unexpectedly switched off
•
heating pump failed
•
heating line inadvertently shut off
Once the boiler temperature has fallen below
86°C, heating resumes automatically.
During such emergency shutdowns the wood
continues to emit gas and the unburned wood
gas causes tar deposits in the boiler and chimney.
Install thermal emergency cooling valve against
overheating
The safety heat exchanger built into the boiler must be
connected by the heating technician to the house's
cold water supply via a thermal relief valve (opening
temperature 97 °C) to protect the boiler against
overheating if the pump fails. The minimum pressure in
the cold water pipe must be 2 bar.
Fig. 5-1: Thermal emergency cooling valve
1
Cold water connection
2
Isolating valve; remove hand wheel
3
Strainer
4
Thermal emergency cooling valve
5
Visible outlet to sewer
The cold water supply must be connected to the upper
connector of the safety heat exchanger; the lower
connector serves as an outlet to the sewer. To prevent
the supply line from being shut off accidentally, remove
the levers from shut-off valves or the hand wheels from
valves and hang them there with a piece of wire.
Summary of Contents for TWIN 20 kW
Page 1: ...2016 04 02 EN 0000000302 V 001 X 36 0 2303 93412 001 TWIN pellet burner 20 26 kW Operation ...
Page 39: ...ETAtouch controller TWIN function block 39 ...
Page 49: ...ETAtouch controller Buffer function block 49 ...
Page 53: ...ETAtouch controller Hot water tank function block 53 ...
Page 57: ...ETAtouch controller Fresh water module function block 57 ...
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