Nibe FIGHTER 1250 User manual

LEK
A
B
C
D
E
F
G
User guide
Transport / Installation
Commissioning / Adjustment
Accessories with quick guide
Control / Alarm
Technical data
Item register
MOS GB 0844-5
NIBE FIGHTER 1250
031132
INSTALLATION AND MAINTENANCE INSTRUCTIONS
NIBE FIGHTER 1250

1NIBE FIGHTER 1250
General information about the installation.................. 2
Installation data .......................................................... 2
A
USER GUIDE................................................................ 3
General information about the heat pump.................. 4
The heat pump’s sub system and its function .............. 5
The front panel........................................................... 6
Heating settings.......................................................... 8
Hot water settings .................................................... 11
Quick guide - heating ............................................... 11
Quick guide – hot water ........................................... 13
Quick guide – extra hot water................................... 13
Maintenance............................................................. 14
Disturbances in comfort............................................ 15
Alarm indication ....................................................... 16
B
TRANSPORT / INSTALLATION ..................................... 17
Transport and installation.......................................... 18
Inspection of the installation ..................................... 19
Pipe connections....................................................... 20
Electrical connection ................................................. 24
C
COMMISSIONING AND ADJUSTMENT....................... 29
Filling and venting the brine system .......................... 30
Filling and venting the heating medium system......... 30
Start-up and inspection............................................. 31
Readjustment............................................................ 31
Emptying the hot water heater ................................. 31
D
ACCESSORIES WITH QUICK GUIDE ........................... 33
Quick guide - RCU 11 ............................................... 35
Quick guide - ESV 21 ................................................ 36
Quick guide - RG 10 ................................................. 36
Quick guide – POOL 11............................................. 37
Quick guide – RE 10.................................................. 38
Contents
E
CONTROL / ALARM................................................... 39
Changing parameters ............................................... 41
Main menus.............................................................. 52
Alarm ....................................................................... 66
F
TECHNICAL DATA ..................................................... 69
List of components ................................................... 70
Dimensions............................................................... 72
Electrical circuit diagram ........................................... 73
Outline Diagram ....................................................... 78
Technical specifications ............................................. 79
G
ITEM REGISTER ......................................................... 81

2
NIBE FIGHTER 1250
General
Icompleted by the installation engineer when the heat pump is installed
Installation date
Serial number (95) , should always be stated with all correspondence with NIBE.
_ _ _ _ _ _ _ _ _ _ _ _ _ _
NIBE FIGHTER 1250
Installer
Type of brine - Mixing proportion/freezing point
Active drilling depth/collector length
Settings
Date ________ Signed ______________________________
Accessories
Installation data
Menu
no. Name Fact.
Setting. Set EBV(2)
Knob Name
Factory
set
Mode
Set
1.4 Start temperature
HW
47 100 Fuse 20
1.5 Stop temperature
HW
54 101 Max electrical
output, mode
D
1.6 Stop temp XHW 60 102 Max hot water
temperature, mode
C (65 °C)
1.8 Interval XHW 14
2.1 Curve coefficient 9
2.2 Offset heating curve 0
2.3 Flow line temp/Min 15
2.4 Flow line temp/Max 55
5.6 Max return line 53
2.7 Circ. pump controls
heat
100
✓Product
Exhaust air module FLM 30
Room sensor RG 10
Extra shunt ESV 21
Pool control POOL11
Communication module RCU 11
In order to get the ultimate benefit from your NIBE
FIGHTER 1250 heat pump you should read through this
Installation and Maintenance Instruction.
- Section A contains information that may be of use to
the end user.
NIBE FIGHTER 1250 is a Swedish made, quality product
offering a long life span and safe operation.
Corrosion protection
Enamel Stainless steel Copper

3
NIBE FIGHTER 1250
A
USER GUIDE
USER GUIDE........................................................................................3
General information about the heat pump..........................................4
Product information............................................................................4
What the heat pump can do...............................................................4
The heat pump’s sub system and its function ......................................5
Some heat pump technology .............................................................. 5
The front panel...................................................................................6
This is how to use the front panel ....................................................... 7
Quick movement ................................................................................7
Menu types.........................................................................................7
Key lock..............................................................................................7
Control computer ..............................................................................7
Heating settings..................................................................................8
Changing the room temperature manually..........................................8
Default setting....................................................................................8
Basic values for the automatic heating control ...................................9
Readjustment the default settings.......................................................9
Controlling the heat supply...............................................................10
Standby mode ..................................................................................10
Quick guide – menu settings heat production ................................... 11
Hot water settings ............................................................................12
Extra Hot Water ................................................................................ 12
Quick guide – menu settings hot water production...........................13
Quick guide – menu settings extra hot water .................................... 13
Maintenance.....................................................................................14
Saving tips ........................................................................................14
Comfort disruption ...........................................................................15
Alarm indications..............................................................................16

4
NIBE FIGHTER 1250
Product information
NIBE FIGHTER 1250 is a complete modern heat pump that
offers effective technical energy saving and reduced carbon
dioxide emissions. Heat production is safe and economical
with integrated hot water heater, immersion heater, circu-
lation pumps and control system.
Heat is obtained via a closed system where water mixed
with antifreeze circulates in a hose out to the heat source
(rock/ground/lake). As the temperature in the ground
remains relatively constant throughout the year, the heat
pump can efficiently recover the renewable “solar energy”
that is stored there.
Features of NIBE FIGHTER 1250 :
Optimal annual heating factor thanks to the inverter
controlled compressor.
Inverter controlled brine pump that supplies the heat
pump with suitable brine flow.
Minimal operating costs, no expensive peaks when it is
cold outside. The compressor adapts as necessary.
Integrated hot water heater.
High temperature range
– Flow line temperature 65 °C
– Return line temperature 56 °C.
Integrated clock for scheduling extra hot water and
temperature lowering/increasing the flow line tempera-
ture.
Prepared for pool heating.
Prepared for control of two heating systems.
What the heat pump can do
NIBE FIGHTER 1250 is part of a new generation of heat
pumps that can supply your house with cheap and envi-
ronmentally friendly heat via an efficient inverter control-
led compressor. The heated water circulates around the
house’s heating unit and heats the water in the 160 litre
hot water heater, which is insulated with EPS (environmen-
tally friendly cellular plastic) for minimal heat loss.
The heat pump can be connected to an optional low tem-
perature distribution system. e.g. radiators, convectors or
under floor heating. It is also prepared for connection to
several different products and accessories, e.g. extra hot
water heater, ventilation recovery, pool, free cooling and
heating systems with different temperatures.
An 8 kW immersion heater connects automatically as re-
serve operation if something unexpected should occur.
FIGHTER 1250 is equipped with a control computer for
many options, e.g. good comfort, good economy and safe
operation. Clear information about status, operation time
and all temperatures in the heat pump are shown on the
backlit front panel. This means, for example, that external
unit thermometers are not necessary.
General information about the heat pump
AGeneral information about the heat pump

5
NIBE FIGHTER 1250
The heat pump’s sub system and its function
Some heat pump technology
The heat pump functions can easily be divided into four
sub processes:
1. Fluid (the refrigerant) that is used in our heat pump
boils* at a very low temperature in the evaporator. The
heat retrieved by the circulating fluid (the brine) from
the ground/rock/lake is enough to cause it to boil.
2. The steam (gas) that is produced when the refrigerant
boils, is drawn into the speed controlled compressor.
There it is compressed just enough for the relevant heat
demand. As the pressure of the gas increases it also be-
comes extremely hot.
(The low temperature refrigerant has been converted to
a high tempered gas)
3. The hot gas is routed into a heat exchanger (condenser)
where it releases its heat into the heating system’s water
(heating medium). It passes through the same con-
denser but on the other side of a separating wall so that
the mediums do not mix.
When heat is transferred to the heating medium the gas
is cooled and converted to a fluid again (condenses).
A
The heat pump’s sub system and its function
4. The expansion valve finally reduces the pressure of
the fluid (refrigerant, so that it can be re-boiled at a low
temperature) at the same time as it only releases the
exact amount of fluid to the evaporator that is to be
reheated and evaporated by the heat retrieved from the
ground.
The described process is repeated over and over and
only the compressor and circulation pumps require elec-
trical energy during normal operation.
The energy for the heating system - and domestic
hot water is obtained, as described above, from the
ground. The heat pump’s COP value determines how
effectively this is carried out(heating factor). The value is
a measurement of how much heat is obtained in rela-
tion to consumed electrical energy.
*) The boiling point of different fluids varies but the pres-
sure in the vessel is important. Water boils at +100 °C in
a saucepan on a hob but would have done so at +80 °C
if the air pressure in the room had been half as high. This
is a property that is used within heat pump technology.
Note that all material that has a greater temperature
than -273 °C contains heat that is possible to recover, the
greater the temperature of the refrigerant the more ef-
fectively this can be carried out.
1
2
3
14
Värmebärarpump
(varvtalsstyrd)
Eltillsats
Växelventil
Värmebärare fram
(VBF)
Värmebärare retur
(VBR)
Förångare
Köldbärarpump
(varvtalsstyrd)
Kompressor (varvtalsstyrd)
Kondensor
VV KV
Expansionsventil
Köldmediei
Värme
returledning
Dubbelmantel
Köldbärare in (KBin)
Köldbärare ut (KBut)
Varmvattenberedare
Värme
framledning
2
1 3
4
HWC
HW CW
Heating flow
line
Heating return
line
Hot water heater
Double jacket
Brine in (KBin)
Brine pump (speed
controlled)
Brine out (KBut)
Evaporator
Refrigerant Expansion valve
Compressor (speed controlled)
Condenser
Heating medium
pump (speed control-
led)
Electrical addition
Heating medium
return (VBR)
Heating medium flow
(VBF)
Shuttle valve
4

6
NIBE FIGHTER 1250
1 Normal mode
All control functions connected
0 Shutdown
Standby mode
Only the circulation pump and electrical
addition (electrical step 2) are operational.
A BI II III I II
5 0 . 0 ° C
Va r m v a t t e n t e m p e r a t u r
13.43
1.0 P
A
The change does not need to be confirmed
with the enter button.
Button pressing (the change does not need to
be confirmed with the enter button).
- Current operating mode is shown in the
display.
- Further button press changes operating
mode.
Press the enter button returns to the normal
display mode.
For information about the different operat-
ing modes, see Chapter A ”Heating settings”,
”Controlling the heat supply-> Operating mode.
During normal operation, the status lamp
lights green. In the event of an alarm, it
lights red.
- Scroll forward in the menu system
- Increase the value of the selected parameter
See the section “Control – General”
The front panel
In normal mode hot water temperature is
displayed.
Description of current
display parameter
Menu number
Pool heating in progress.
Key lock activated.
Timer function
No function
Operating mode
Extra hot water (XHW)
Status lamp
- Select lower menu in the menu system
- Parameter change activated
- Parameter change confirmed
See the section “Control – General”
Enter button
- Scroll back in the menu system
- Reduce the value of the selected parameter
See the section “Control – General”
Minus button
Plus button
Information symbols
Current display parameter
- Compressor is operational
Flashing symbol means that the load monitor
limits compressor operation.
Compressor symbol
House heating in progress
Heating system symbol
”I” Circulation pump is in operation.
”II” Circulation pump 2 is in operation
(accessory ESV 21 required).
Circulation pump symbol
If electrical addition is connected
”I” Electrical step 1
”II” Electrical step 2
”I II” Electrical step 1+2
Flashing text means that the load monitor
limits the electrical output.
Addition. heat symbol
The heat pump charges the hot water.
”A” Temporary temperature increase in progress.
”B” Time based temperature increase in progress,
e.g. periodic.
Hot water symbol
AThe front panel
1.0
P
Switch
- Turning clockwise (+) increases the room
temperature.
When the knob is turned menu 2.0 is shown
on the display and the value for the calculated
flow temperature changes.
Offset heating curve

7
NIBE FIGHTER 1250
Key lock
A key lock can be activated in the main menus by simulta-
neously pressing the plus and the minus buttons. The key
symbol will then be shown on the display.
The same procedure is used to deactivate the key lock.
Control computer
The heat pump is controlled by a computer that ensures
that all component parts work in the most efficient way for
the relevant operation.
It controls and monitors hot water production and provides
information about set control conditions. In the event of a
malfunction, an alarm and warnings are transmitted to the
front panel to keep the user informed about the conditions
at all time. At the same time, the heat pump is controlled
in a way that prevents damage to the installation.
Extra accessories
Accessories for controlling extra heating circuit and pool
heating for example, are also controlled by the control
computer according to the settings carried out on the front
panel. If necessary, it is also possible to connect a room
temperature sensor.
This is how to use the front panel
All the most common settings are made from the panel as
well as control computer instructions such as comfort etc.
that you require the heat pump system to fulfil.
In order for the installation to be used optimally, certain
default settings must have been made (see the section
”Default settings”) and the installation is carried out ac-
cording to the relevant instructions.
Menu types
Menu 1.0 is normally shown on the
display
(the temperature in the hot water heater)
The plus and minus buttons and the en-
ter button are used to scroll through the
menu system as well as to change the set
value in some menus.
Control is divided into different menu types depending on
how ”deep” into the controls you need to go.
Normal [N]: The settings you as a customer often
need.
Extended [E]: Shows all detailed menus except the serv-
ice menus.
Service [S]: Shows all menus.
Changing of menu type is done from menu 8.1.1
Quick movement
To quickly return to the main menu from a sub menu, press
one of the following buttons:
1. Operating mode button
2. The Enter button
Note! Ensure that the operating mode (Auto, Summer,
Only additional heat, alarm mode) is not altered
during quick movement.
A
The front panel

8
NIBE FIGHTER 1250
The indoor temperature depends on several factors.
Sunlight and heat emissions from people and house-
hold machines are normally sufficient to keep the house
warm during the warmer parts of the year.
When it gets colder outside, the heating system must
be started. The colder it is outside, the warmer radia-
tors and under floor heating systems must be.
Controlling heat production
Normally the heat pump heats the water (heating medium)
to the temperature required at a certain outdoor tempera-
ture. This occurs automatically on the basis of the collected
temperature values from the outdoor sensor and sensors
on the lines to the radiators (flow line sensors).
However, the correct default settings must be made on the
heat pump first, see the section “Default settings”.
The temperature information that the outdoor sensor
(mounted on an exterior wall of the house) sends to the
heat pump’s control computer senses variations in the
outdoor temperature early on. It does not have to be cold
inside the house before the control system is activated, as
soon as the temperature drops outside, the temperature of
the water to the radiators inside the house automatically
increases.
Radiator temperature
The temperature of the radiators in relation to the outdoor
temperature can be determined by you by selecting a heat
curve and by using the ”Offset heat curve” knob on the
heat pump’s front panel.
Default setting
The basic heating is set using menu 2.1 and with the
“Heating curve offset” knob.
If you do not know the correct settings use the basic data
from the map opposite.
Changing the room temperature manually
If you want to temporarily or permanently increase or low-
er the indoor temperature turn the ”Offset heating curve”
knob clockwise or anticlockwise. One line approximately
represents a 1 degree change in room temperature.
A
Heating settings
Heating settings
An increase in the room temperature may
be inhibited by the radiator or underfloor
heating thermostats, if so these must be
turned up.
Wait one day between settings so that the
temperatures have time to stabilise.
Note!
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 40 °C
UTETEMPERATUR
- 10
0
10 - 20 - 30
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
VÄRMEKURVA
- 5
+ 5
FÖRSKJUTNING
VÄRMEKURVA (0)
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
- 40 °C
UTETEMPERATUR
- 10
0
10
- 5
+ 5
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 20 - 30
FÖRSKJUTNING
VÄRMEKURVA (-2)
VÄRMEKURVA
1514 13 12 11 10
8
7
6
5
4
3
2
1
- 40 °C
UTETEMPERATUR
- 10
0
10
- 5
+ 5
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 20 - 30
FÖRSKJUTNING
VÄRMEKURVA (+2)
9
VÄRMEKURVA
Shifting the heating curve -2
Shifting the heating curve 0
Shifting the heating curve +2
Setting with diagrams
The diagram is based on the dimensioned outdoor temper-
ature in the area and the dimensioned supply temperature
of the heating system. When these two values “meet”, the
heating control's curve coefficient can be read. This is set
under menu 2.1, Curve coefficient.
Menu 2.1 Curve coefficient Offset heating curve
HEATING CURVE
OFFSET HEAT CURVE
SUPPLY TEMPERATURE
OUTSIDE TEMPERATURE
HEATING CURVE
OFFSET HEAT CURVE
SUPPLY TEMPERATURE
OUTSIDE TEMPERATURE
HEATING CURVE
OFFSET HEAT CURVE
SUPPLY TEMPERATURE
OUTSIDE TEMPERATURE
Note!
9
C u r v e c o e f f i c i e n t
2.1

9
NIBE FIGHTER 1250
Readjustment the default settings
If the required room temperature is not obtained, readjust-
ment may be necessary.
Cold weather conditions
- When the room temperature is too low, the “Curve co-
efficient” value is increased in menu 2.1 by one incre-
ment.
- When the room temperature is too high, the “Curve
coefficient” value is decreased in menu 2.1 by one
increment.
Warm weather conditions
- If the room temperature is low, increase the heating
curve offset setting by one step.
- If the room temperature is high, reduce the “Heating
curve offset” setting by one step.
A
Heating settings
* A low temperature radiator system refers to a system
where the flow temperature needs to be 55 °C on the
coldest day.
** Floor heating can be dimensioned very differently.
Examples 2 and 3 above refer to a system where the
flow temperature needs to be approximately 35–40 °C
resp 45–50 °C on the coldest day.
London
Bristol
Plymouth
Birmingham
Liverpool Manchester
Glasgow
Edinburgh
Aberdeen
Londonderry
Belfast
Dublin
Cork
Limerick
14 (7)
15 (7)
15 (7)
15 (8)
15 (7)
15 (7)
15 (8
)
15 (8)
Basic values for the automatic heating control
The values stated on the map apply for the “Curve slope”.
The first value applies for low temperature* radiator sys-
tems. “Offset heating curve” is set to -2.
The value in brackets refers to floor heating systems** in-
stalled in concrete floor structures. When the system is in-
stalled in a timber floor structure you can use the number
before the brackets, but this value must be reduced by
two units. In these cases the “Offset heating curve” is set
to -1.
The map values are usually a good starting point and
concern an approximate room temperature of 20 °C. The
values can be adjusted later if necessary.
Examples of basic data selection:
1. House with low temperature* radiator systems
London = Area 15 (8). Set 15 on menu 2.1, and -2
on the knob “Offset heating curve”.
2. House with floor heating** installed in a
concrete floor structure
London = Area 15 (8). Set 8 on menu 2.1, and -2 on
the knob “Offset heating curve”.
3. House with floor heating** installed in a timber floor
structure
London = Area 15 (8). Set 13 (15-2=13) on menu 2.1
and -1 on the “Offset heating curve” knob.

10
NIBE FIGHTER 1250
Controlling the heat supply
After adjustment (according to selected settings of the
curve coefficient and offset) the correct amount of heat
is supplied in relation to the actual outdoor temperature.
The heat pump’s flow 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
influence the temperature.
”Degree minutes
For subnormal temperatures the control computer calcu-
lates a heating deficit 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-
firmed 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
AHeating settings
Hot water is not produced in standby mode.
(Component numbering, see section F “List of compo-
nents”)
Note!

11
NIBE FIGHTER 1250
A
Heating settings
Quick guide – menu settings heat production
Operating mode
The menu can be accessed via the operating mode but-
ton. Here you select whether heat production is permit-
ted.
Menu 2.1 Curve coefficient [N]
The selected curve coefficient (heating curve) is shown
here. At value 0, the function “Own curve” is activated,
see menu 2.6.0.
The value can be set between curves 0 and 15.
- Factory setting: 9
Menu 2.2 Offset heating curve [N]
The selected heating curve offset is shown here.
Note! The value is changed using the “Heating curve
offset” knob.
The value can be set between -10 and +10.
- Factory setting: 0
Menu 2.3 Flow temp./Min [E]
The set minimum level for the supply temperature to the
heating system is shown here.
The calculated flow temperature never drops below the
set level irrespective of the outdoor temperature, curve
coefficient or offset heating curve.
The value is adjustable between 2 and 80 °C
- Factory setting: 15 °C
Menu 2.4 Flow temp./Max [E]
The set maximum level for the supply temperature to the
heating system is shown here.
The calculated supply temperature never exceeds the set
level irrespective of the outdoor temperature, curve coef-
ficient or offset heating curve.
The value is adjustable between 10 and 80 °C
- Factory setting: 55 °C
Menu 1.0 is normally shown on the display
(the temperature in the hot water heater)
The plus and minus buttons and the enter
button can be used to scroll in the menu
system and change values in certain menus.
(See Front panel section)
Menu values

12
NIBE FIGHTER 1250
The integrated hot water heater is surrounded by the circu-
lating water that the heat pump heats.
During ”normal” consumption it is enough to run the heat
pump’s compressor to supply the different tapping points
of the house with hot water. The temperature of the hot
water at the top of the hot water heater then varies be-
tween the set values.
(See controlling ”Hot water temperature”)
Prioritizing
If the water in the heater needs heating, the heat pump
prioritizes this and shifts to hot water mode with the entire
heat pump output.
No room heat is produced in this mode.
Prioritizing can be affected via settings in the front panel.
(See controlling ”Hot water temperature”)
”Extra hot water” can be activated in three different
ways:
1. Periodic time based extra hot water
- The increase starts when the compressor increases
the HW temp to the set temperature in menu 1.7,
then the electrical addition increases the temperature
to 65 ºC.
- The increased temperature is maintained by the elec-
trical addition for one hour.
- Interval between increases selected in menu 1.8.
Menu 1.9 shows when the next increase is due.
2. Schedule time based extra hot water
- The increase starts when the compressor increases
the HW temp to the set temperature in menu 1.7,
then the electrical addition increases the tempera-
ture in menu 1.6. The increased temperature is
maintained by the electrical addition for the selected
period.
- The start and stop times for the day of the week that
the increase is required is set in the sub menus to
menu 7.5.0.
3. Temporary extra hot water
- The current ”extra hot water” mode is
shown on the display when the button is
pressed and when you continue to press
the button the mode changes in steps 3,
6, 12, and 24 hours and the standby mode.
- The increase starts when the compressor increases
the HW temp to the set temperature in menu 1.7,
then the electrical addition increases the temperature
in menu 1.6. The increased temperature is main-
tained by the electrical addition until the period of
time has expired.
(See controlling ”Hot water temperature”)
Extra Hot Water
The ”Extra hot water” function temporarily increases the
temperature of the hot water. The temperature is first
increased to an adjustable level by the compressor (menu
1.7) and then the electrical addition increases until the stop
temperature is reached (menu 1.6).
Temporary ”Extra hot water” is activated manually, whilst
time based extra hot water is activated using the settings
made in the control computer.
When:
- ”A” appears above the -icon, temporary extra
hot water is active.
- ”B” appears above the -icon, time based extra
hot water is active.
(See controlling ”Hot water temperature”)
Hot water settings
”Extra hot water” can mean that the electri-
cal addition has been activated and therefore
increases the electrical consumption.
AHot water settings
A BI II III I II
5 0 . 0 C
Va r m v a t t e n t e m p e r a t u r
13.43
1.0 P
Note!
Menu 1.0 is normally shown on the display
(the temperature in the hot water heater)
The plus and minus buttons and the enter
button can be used to scroll in the menu
system and change values in certain menus.
(See Front panel section)
Menu values

13
NIBE FIGHTER 1250
A
Hot water settings
Quick guide – menu settings for hot water
charging
Menu 1.2 Time period [N]
The length of time is set here.
The value is adjustable between 5 and 60 minutes.
- Factory setting: 60 min
Menu 1.3 MAX-time HW-period [N]
Here you select how much time of the period time
(menu 1.2) is to be used to heat the hot water when
there is a need of both heating and hot water.
The value is adjustable between 5 and 60 minutes.
- Factory setting: 20 min
Menu 1.4 HW-temp/Starttemp.HW [N]
Start temp.HW
The temperature when the heat pump starts hot wa-
ter charging is set here. When brackets are shown
containing a minus symbol, this means the high pres-
sure pressostat has tripped during hot water charging
and FIGHTER 1250 has automatically lowered the set
temperature by the value in brackets. The reduction is
removed when the start value is changed.
The value is adjustable between 25 and 55 °C
- Factory setting: 47 °C
Menu 1.5 HW-temp/Stop temp.HW [N]
Stop temp.HW
The temperature when the heat pump stops hot wa-
ter charging is set here. When brackets are shown
containing a minus symbol, this means the high pres-
sure pressostat has tripped during hot water charging
and FIGHTER 1250 has automatically lowered the set
temperature by the value in brackets. The reduction is
removed when the stop value is changed.
The value is adjustable between 30 and 60 °C
- Factory setting: 54 °C
Quick guide – menu settings extra hot water
Extra Hot Water
The menu can be accessed by pressing the ”Extra hot
water” button (See previous page).
Menu 1.6 Stop temp XHV [E]
The desired stop temperature for extra hot water is set
here.
The value is adjustable between 40 and 70 °C
- Factory setting: 60 °C
Menu 1.7 Stop compressor XHV [E]
The temperature to stop the compressor for extra hot
water is set here.
The value is adjustable between 50 and 60 °C
- Factory setting: 55 °C
Menu 1.8 Interval XHV [E]
Periodic time based extra hot water is selected here.
Extra hot water is shut-off when 0 is set. Extra hot wa-
ter starts when the value has been confirmed.
The value is adjustable between 0 and 90 days.
- Factory setting: 14 days
Menu 1.9 Next XHV action [E]
Future increases to the “Extra hot water” level are
shown here.
Menu 1.0 is normally shown on the display
(the temperature in the hot water heater)
The plus and minus buttons and the enter
button can be used to scroll in the menu
system and change values in certain menus.
(See Front panel section)
Menu values

14
NIBE FIGHTER 1250
Your heat pump is, in principle, maintenance free and
therefore requires minimal care after commissioning.
The heat pump, however, consists of many parts and there-
fore has integrated monitoring functions to assist you.
If something abnormal occurs, a message appears
about malfunctions in the form of different ”alarm”
texts in display.
The brine that obtains the heat in the ground is not
normally consumed but just pumped around. There is
a level vessel where you can check if there is sufficient
fluid in the system. The level can vary due to the fluid’s
temperature. If the level is about 1/3, top up.
(See section ”Readjustment, collector side”)
Check for leakage.
Saving tips
Your heat pump installation produces heat and hot water
according to your needs. It also attempts to carry out all
requirements with all available ”aids” from the control set-
tings made.
Known factors that affect the energy consumption are, for
example, the indoor temperature, hot water consumption
and the insulation level of the house, as well as the level of
comfort you require.
Also remember:
Open the thermostat valves fully
(with the exception of those rooms that may be re-
quired to be cooler, e.g. bedrooms).
Thermostat valves in the radiators and floor loops can
negatively affect the energy consumption. They slow the
flow in the heating system, which the heat pump wants
to compensate with increased temperatures. It then works
harder and consumes more electrical energy.
A
Maintenance
1/3
LEK
Maintenance
Never carry out any work on a heat pump
that requires special permission e.g. on elec-
trical or cooling parts.
Safety valves
The heating system’s and hot water heater’s safety
valves can, at temperature changes, release a little wa-
ter.
The overflow water pipes from the safety valves must
not be obstructed and must be visible.
The safety valves must be checked regularly to prevent
blockages. This is usually done by turning the safety
valve’s knob anti-clockwise. The water should then
flow through the safety valve. If this does not happen,
replace the safety valve.
The appearance and location of the safety valves differs
between different installations. Contact your installer for
information.
Emptying the hot water heater
The siphon principle is used to empty the hot water heater.
This can be done either via the drain valve on the incoming
cold water pipe or by inserting a hose into the cold water
connection.
Note!

15
NIBE FIGHTER 1250
Comfort disruption
Use the following list to find and remedy any heating or hot water problems.
Symptom Cause Action
Low hot water temperature or a lack of
hot water
Circuit or main MCB tripped. Check and replace blown fuses.
Compressor and immersion heater do not
heat.
Check and replace any blown circuit and
main fuses.
Possible earth circuit-breaker tripped. Reset the earth circuit-breaker, if the
earth circuit-breaker trips repeatedly, call
an electrician.
Switch (8) set to 0. Set the switch to 1.
Large hot water demand. Wait a few hours and check if the hot
water temperature rises.
Too low start temperature setting on the
control system.
Adjust the start temperature setting
menu 1.4.
Low room temperature. Possible earth circuit-breaker tripped. Reset the earth circuit-breaker, if the
earth circuit-breaker trips repeatedly, call
an electrician.
Compressor and immersion heater do not
heat.
Check and replace any blown circuit and
main fuses.
The compressor does not run because of
a too low set value on the heating curve.
Check and possibly raise the Offset hea-
ting curve (knob on the front panel) or
Curve coefficient.
Circuit or main MCB tripped. Check and replace blown fuses.
Heat pump in incorrect operating mode
”Summer”.
Change operating mode to ”Auto”.
High room temperature. Incorrect setting of Curve coefficient and/
or Offset heating curve
Adjust the setting.
The compressor does not start. Minimum time between compressor starts
has not been reached (see menu 5.4).
Wait 30 minutes and check if the com-
pressor starts.
Alarm tripped. See section ”Alarms”.
Alarm cannot be reset. Activate operating mode ”Only additional
heat”.
Panel gone out. Check and replace any blown circuit and
main fuses.
Set switch (8) to standby
” ”.
A
Comfort disruption
Menu 1.0 is normally shown on the display
(the temperature in the hot water heater)
The plus and minus buttons and the enter
button can be used to scroll in the menu
system and change values in certain menus.
(See Front panel section)
Menu values

16
NIBE FIGHTER 1250
Alarm text on the display Alarm description Check/remedy before installers/service
technicians are called
LP alarm Tripped low pressure pressostat That there is brine in the level vessel.
HP alarm Tripped high pressure pressostat That thermostats for the radiators/under floor
heating loops are open.
Inverter error Inverter error Check and replace any blown circuit and main
fuses.
Panel gone out Check and replace any blown circuit and main
fuses.
Set switch (8) to standby ” ”.
The table shows the types of alarms that may occur in the event of a malfunction.
Alarm indications
There are many monitoring functions integrated in the heat
pump system. To alert you to any malfunctions, the control
computer transmits alarm signals that can be read from the
front panel display.
Different types of alarms
Alarms with automatic reset
(do not need to be acknowledged when the cause has
disappeared).
Existing alarms that require corrective action by you or
the installer.
In the event of an alarm
The background lighting in the display starts flashing
and the status lamp lights red.
Certain alarms switch off hot water charging to alert you
to an error, at the same time, the operating mode shifts to
”Only additional heat” and additional heat is engaged.
Acknowledging alarms
(No harm in acknowledging an alarm)
When an alarm has been triggered, it can be acknowl-
edged by switching the switch (8) off and on for
FIGHTER 1250.
When the alarm cannot be reset using the switch (8),
the operating mode, "Only additional heat", can be ac-
tivated to have access to hot water gain.
This is most easily carried out by holding
the ”Operating mode” button in for 7
seconds.
A
8
Alarm indications
Recurring alarms mean that there is a fault in
the installation.
Contact your installer!
Other alarm, see section E ”Control”
Menu 1.0 is normally shown on the display
(the temperature in the hot water heater)
The plus and minus buttons and the enter
button can be used to scroll in the menu
system and change values in certain menus.
(See Front panel section)
Menu values
Note!

17
NIBE FIGHTER 1250
B
TRANSPORT / INSTALLATION
TRANSPORT / INSTALLATION .............................................................17
Transport and installation..................................................................18
Service area ......................................................................................18
Removing the covers.........................................................................18
Inspection of the installation ............................................................. 19
Checklist: Commissioning and checks ............................................... 19
Pipe connections...............................................................................20
General.............................................................................................20
Collectors .........................................................................................20
Pump diagram ..................................................................................20
Connecting the brine........................................................................21
Connecting the heating medium ......................................................21
Connecting the hot water heater......................................................21
Connections/Dockings .....................................................................22
Electrical connections........................................................................24
Miniature circuit-breaker...................................................................24
Temperature limiter...........................................................................24
Centralised load control and load monitor ........................................26
External contacts .............................................................................. 27
Connecting the outside sensor..........................................................28
Alarm/alarm outputs.........................................................................28

18
NIBE FIGHTER 1250
LEK
LEK
The FIGHTER 1250 must be transported and stored upright
and dry. FIGHTER 1250 may be carefully laid on its back
when being moved into a building.
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater 51°C
+2
0
-2
1
R
0
HMflow
49(50)°C
Hotwater
51°C
Location
Place the heat pump:
on a firm base, preferably on a concrete floor or foun-
dation.
Install FIGHTER 1250 with its back to an outside wall,
ideally in a room where noise does not matter. If this
is not possible, avoid placing it against a wall behind a
bedroom or other room where noise may be a problem.
Wherever the unit is located, walls to sound sensitive
rooms should be fitted with sound insulation.
Route pipes so they are not fixed to an internal wall
that backs on to a bedroom or living room.
In addition to the actual heat pump, components are
enclosed on delivery
In a bag on top of the heat pump there are:
Outside sensor
Clips for connecting pipe brine
Particle filter
Level vessel with safety valve
Cover plates, brine
Connecting pipe brine, with insulation
Current transformers
Installation and Maintenance Instruction
A distance of 800 mm is
needed in front of FIGHTER
1250 and leave 400 mm of
space free to the right and
left of the heat pump for
servicing.
When FLM is fitted on
FIGHTER 1250 the distance
to the wall should be at least
50 mm.
Service area
LEK LEK
1
2
LEK
LEK
Side covers
1. Lift the cover up and
out at the lower edge.
Removing the covers
B
Transport and installation
Transport and installation
LEK
LEK
LEK
LEK
Connecting pipe brine,
with insulation Current transformers
Clips for connecting
pipe brine
LEK
LEK
NIBEAB
Utetemperaturgivare
Outdoortemperature sensor
Aussentemperaturfühler
Artikel018764
Level vessel
Particle filter
Cover plates,
brine
Outside sensor
LEK
4
5
85
63
81
52
15
(Component numbering, see section F “List of components”)
LEK
Front cover
1. Remove the screws from the lower edge of the front
cover.
2. Lift the cover up and out.
LEK
FLM
Safety valve