NIBE FIGHTER 1250
Controlling the heat supply
After adjustment (according to selected settings of the
curve coeffi cient and offset) the correct amount of heat
is supplied in relation to the actual outdoor temperature.
The heat pump’s fl ow temperature (menu 2.0) will hover
around the theoretical required value (the value in brackets
on the display). Extra accessories such as room sensors, can
infl uence the temperature.
” Degree minutes
For subnormal temperatures the control computer calcu-
lates a heating defi cit in the form of “degree-minutes”,
which means that heating production is accelerated. The
larger the subnormal temperature, the greater the heat
production.
The degree minute value is the basis for controlling the
heating mode.
Operating mode
The “Operating mode” button is used
to set the required operating mode with
regard to permitting/blocking the circula-
tion pump and additional energy.
The change does not need to be con-
fi rmed with the enter button.
The current operating mode is shown on the front panel
display when the button is pressed and the mode changes
when you continue to press the button.
The display returns to the normal display mode once the
enter button is pressed.
The different operating modes are:
1. ”Auto(without electricity)”, ”Auto(with electric-
ity)” or “Auto(Summer)”
- FIGHTER 1250 automatically selects the operating
mode by taking the outdoor temperature into ac-
count.
- The circulation pump is permitted to operate when
there is a need.
- The electrical addition is permitted if ”On” is select-
ed in menu 8.2.3.
- However, when “Extra hot water” is activated the
electrical addition is connected.
2. “Summer mode”
Only production of hot water with
FIGHTER 1250.
- The circulation pump and electrical addition are
blocked.
- However, when “Extra hot water” is activated the
electrical addition is connected.
3. ”Only addition”
- Compressor and brine pump blocked. The function
is activated/deactivated by pressing in the ”operating
mode button” for 7 seconds.
4. ”Alarm mode”
- In the event of an alarm, FIGHTER 1250 selects this
operating mode.
Standby mode
Standby mode is activated by setting switch (8) to ” ”.
The front panel is not lit and the control computer is
not connected.
The temperature is controlled by the thermostat (3). It
can be set to either 35 °C or 45 °C.
The compressor and refrigerant pump are off and only
the heating medium pump and electrical addition are
active (in standby a 6 kW electrical step is connected).
LEK
8
3
8
A
Heating settings
Hot water is not produced in standby mode.
(Component numbering, see section F “List of compo-
nents”)
Note!
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