User’s manual
DHW mode
Combined mode
Heating mode
Scheme 3. Sequence of the boiler’s operating modes change.
3.2.1 Standby mode
In the standby mode, when the boiler is waiting for the user’s commands, the symbol
is shown on
display. The boiler is not in operation, but the possibility of switching on the antifreeze functions (see p.3.3.1,
page9) and parameters programming (see p.13.3.1, page 26) remains.
3.2.2. DHW mode
In the DHW mode the boiler is operating only for the DHW system. The boiler ignores the signals of the room
thermostat and the heating circuit temperature sensor 10 (see p.3.3.3, page 9). If hot water is not used, the
symbol
is constantly shown on display. When hot water is used, the symbol
is flickering.
The water temperature regulation range is 30 ÷ 60
o
С.
CAUTION! The possibility of set temperature support in the DHW mode is limited by the boiler’s
minimal heating effect -
8,9 kW. So in case of higher water temperature by the DHW supply circuit inlet
(during the summer season) and its small consumption the temperature by the DHW supply circuit
output might be much higher than the set one. In order to reduce water temperature in this case you
need to increase its flow through the DHW supply circuit. This aspect of the boiler’s operation is not a
failure and permits to save the principal possibility of the boiler’s operation in DHW mode in given
conditions.
User’s Manual
3.2.3 Combined mode
In the combined mode the boiler operates both for heating and DHW. While operating in this mode the
symbols
and
are shown on display. If there is no water flow in the water supply line the
boiler operates in the heating mode (the symbol
is flickering and the symbol
is glowing). If
hot water is used, the boiler automatically switches to the DHW mode (the symbol
is glowing, and the
symbol
is flickering).
3.2.4. Heating mode
In the heating mode the boiler operates only for the heating system. The boiler ignores the signal from the
flow sensor of DHW 15 ( see p.13.1, page 24). In this mode the symbol
is flickering on display. The
heating system temperature regulation range is 30 ÷ 85
o
С.
3.3. Additional functions
The boiler is provided by additional functions that may be used under several operation modes. These
functions provide additional safety and easiness in exploitation and in the boiler’s operation.
3.3.1 Antifreeze function
The antifreeze function is an inserted safety system, which automatically launches the boiler in the heating
mode when the temperature when the temperature in the heating system reduces for less than + 8 °С and
switches the boiler off when the water temperature reaches the level of + 30 °С. This mode is activated
automatically in case if the following conditions are fulfilled:
-
The boiler is connected to the electricity network and to the gas pipeline;
-
The boiler is not in blocked position because of failure;
-
The pressure in the heating system corresponds with the set parameters.
3.3.2. Anti-blocking function
