12 | Low capacity buffers
VI. Operating mode
Before using the water heater, make sure
the appliance is connected with the heating
installation in the correct way and that it is
filled with water.
Only qualified P&P specialists and Electri-
cians should put the device into operation.
VII. Important rules
• The use of the appliance for any purpose
other than its intended one is prohibited.
• Do not switch on the water heater unless
you have established that it is filled with
• The installation and maintenance must
be carried out by a professional from the
sector in accordance with the manufac-
• The buffer must only be installed in prem-
ises with normal fire resistance. There
should be a siphon connected to a plumb-
ing drainage. The premises temperature
should never be lower than 4 °C.
• Only qualified P&P specialists and Elec-
tricians should perform the connecting
of the buffer to the water main, local or
central water heating, solar panel and
electric mains. If there is a likelihood of
the premise's temperature falling below
0°C, the water heater must be drained by
raising the safety return-valve's lever.
• During use (water heating mode), the
dripping of water from the safety return-
valve's drainage opening is normal. This
must be left open to the atmosphere.
• In order to ensure the water heater's safe
operation, the safety return-valve must
undergo regular cleaning and inspec-
tions for normal functioning /the valve
must not be obstructed/, and for regions
with highly calcareous water it must be
cleaned of accumulated lime scale. This
service is not provided under warranty
• If upon lifting the valve's lever when the
water tank is full, water commences to
flow from the valve's drainage opening,
this is a sign of a malfunction and the ap-
pliance's use must be discontinued.
• This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities,
or lack of experience and knowledge,
unless they have been given supervi-
sion or instructions concerning use of the