Nibe FIGHTER 120 User manual

MOS GB 1012-5
FIGHTER 120
M10535
INSTALLATION AND MAINTENANCE INSTRUCTIONS
NIBE FIGHTER 120
LEK

LEK

1NIBE FIGHTER 120
For Home Owners
General
Principle of operation ___________________________ 3
System diagram _______________________________ 4
Front panel ___________________________________ 5
Remote control ________________________________ 6
Basic settings __________________________________ 7
Maintenance routines
Cleaning the air filter ___________________________ 8
Cleaning the ventilation devices __________________ 8
Checking safety valves __________________________ 8
Dealing with malfunctions
Troubleshooting _______________________________ 9
Alarms _______________________________________ 9
For the Installer
Installation
General information for the installer _____________ 10
Pipe installation _______________________________ 11
Filling the hot water heater _____________________ 12
Emptying the hot water heater __________________ 12
Duct installation ______________________________ 12
Exhaust air devices ____________________________ 12
Electrical connections __________________________ 13
Circulation pump connection ___________________ 13
Sensor connection ____________________________ 13
Commissioning and adjusting
Commissioning _______________________________ 14
Adjusting the pump flow _______________________ 14
Service menus ________________________________ 15
Registering remote control _____________________ 15
Hot water settings ____________________________ 15
Adjusting the ventilation flow ___________________ 16
Fan diagram _________________________________ 16
Miscellaneous
Control
Navigation ___________________________________ 17
Technical specifications
Component locations __________________________ 24
Dimensions and setting-out coordinates __________ 26
Electrical circuit diagram _______________________ 28
Enclosed kits _________________________________ 29
Technical specifications ________________________ 30
Contents

2NIBE FIGHTER 120
For Home Owners
General
Thank you for relying on NIBE to supply your heat pump and con-
gratulations on choosing FIGHTER 120, a high quality product with
a long service life, developed and manufactured in Sweden.
In order to get the ultimate benefit from your FIGHTER 120 you
should read through the “For Home Owners” section in this
Installation and Maintenance Instruction.
FIGHTER 120 is an exhaust air heat pump. This means that it col-
lects the energy in the ventilation air and uses it for hot water heat-
ing.
The heat pump is designed to be installed in houses or similar.
The serial number (103), must always be stated in all correspon-
dence with NIBE.
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Installation date:
Installer:
Fan speeds:
Low:______% Medium:______% High:______%
Date:_______ Sign:______________________

3NIBE FIGHTER 120
For Home Owners
Ø125
Ø160
10 °C
20 °C
230 V
Fan (36)
Evaporator (62)
Condenser (61)
Compressor (27)
Circulation
pump (16)
Hot water
Cold water
Air filter (63)
Roof
Remote control
Insulation
Sound dampering
(normally recommended)
General
Principle of operation
FIGHTER 120 is a two piece heat pump that is supplied
with an air treatment section and a stainless-steel stor-
age heater. The heat pump recovers energy from the
ventilation air. The recovered energy supplies hot wa-
ter via a circuit with water circulating between the air
treatment section and heater. The heat pump has an
integrated DC fan and must be installed in a ventilation
system intended for mechanical exhaust air.
When the exhaust air at room temperature passes
through the evaporator, the refrigerant evaporates be-
cause of its low boiling point. In this way the heat in the
room air is transferred to the refrigerant.
The refrigerant is then compressed in a compressor,
causing the temperature to rise considerably.
The hot refrigerant is routed to the condenser where
the heat is transferred to the circulating water that is
forwarded to the water heater. The temperature of the
refrigerant therefore lowers and changes from steam to
fluid.
The refrigerant then goes via filters to the expansion
valve, where the pressure and temperature are further
reduced.
The refrigerant has now completed its circulation and
returns to the evaporator.
The numbers in brackets refer to section "List of compo-
nents".
Symbol explanation
Shut-off valve Temperature sensor
Expansion valve Trimventil
Non-return valve Safety valve

4NIBE FIGHTER 120
For Home Owners
LEK
C
When the room air has
passed through the heat
pump it is discharged.
The temperature has then
dropped as the heat pump
has utilised the energy in the
room air.
G
The air from the kitch-
en fan goes directly out
into a special duct.
B
The hot room air
is fed to FIGHTER
120.
D
FIGHTER 120 supplies the
house with hot water.
E
Outdoor air is drawn
into the house.
A
The hot room air enters
the duct system.
F
Air is transported from
rooms with outdoor
air devices to rooms
with exhaust air de-
vices.
System diagram
General

5NIBE FIGHTER 120
For Home Owners
STATUS
DRIFT
Display Control knob
Switch Indicator lamps
Pull the front panel forward with both hands in order to
gain access to the control panel.
Switch
with two positions:
0Off
1 On
Display
LCD display that shows operational information and set-
tings for the heat pump.
Control knob
The control knob is used to navigate between men-
us and to make settings. Refer to the “Control” –
“Navigation” section for a detailed description.
Indicator lamps
Lamp Not lit Green Orange Flashing orange Flashing red
A Heat pump off – Compressor is
operational.
Defrosting in progress Alarm
B Heat pump off Periodic hot
water increase
activated*
– Service menus
activated
–
* Fulfils requirements for protection against legionella.
Front panel
General

6NIBE FIGHTER 120
For Home Owners
General
Fan mode LOW
Fan mode MED
Fan mode HIGH
Push button
Remote control
The remote control is used to control the ventilation
flow and to indicate any alarms and filter changes/clean-
ing.
The remote control can be used to make changes in the
ventilation flow by shifting the fan speed between LOW,
MEDIUM and HIGH.
The factory setting is that the changes of the remote
control are permanent. There is a possibility to let the
changes automatically return to the previous setting af-
ter a certain time. This time is set in menu “SETTINGS”
> “RETURN”.
The remote control functions as follows:
Idle mode
For a low remote control power consumption, the unit
shifts to idle mode when not in use. The unit ”wakes”
once every half an hour and determines if there is an
alarm. If there is no alarm, it returns to idle mode.
Indication of current fan speed
To view the current speed of the fan, press the button
on the remote control once. A green lamp flashes indi-
cating the current fan speed. If the button is not pressed
again, the remote control returns to idle mode after 5
seconds.
Changing the fan speed
When the button on the remote control is pressed in, a
green lamp flashes for the current fan speed. If the but-
ton is pressed again, within 5 seconds, the next green
lamp starts to flash. When the fan speed flashes, the
choice is confirmed by holding the button in until the
flashing light shines green continuously. The remote
control returns to idle mode 5 seconds after the last
button press.
Alarm indication
To see if an alarm has been triggered in the heat pump,
press the button once. If the heat pump has received
an alarm, this is indicated by a red flashing lamp on
the remote control. See section ”Dealing with malfunc-
tions” – ”Alarms” for information about alarm types.
Acknowledge an alarm by switching the current on
FIGHTER 120 off and then on.
NOTE! Recurring alarms mean that there is a fault in the
installation. Contact your installer!
Alarm indicator
Remote control outside range
If the remote control’s red lamp flashes during 8 sec-
onds after the button is pressed, the remote control is
outside its range.
Batteries
Batteries (2 pcs (L)R03 AAA) for the remote control are
supplied.
Due to the sensitivity of the remote control to static
electricity, it is important not to touch the electrical
components of the remote control and to change the
batteries according to the following instructions:
QRemove the screw from the reverse of the remote
control and open the cover.
QHold the remote control in one hand and change
the batteries with the other. Always use both hands
when changing batteries.
QIf the remote control is picked up without the cover,
always keep one hand on the plastic body before
contact with the internal electronics is made.
LEK
LEK

7NIBE FIGHTER 120
For Home Owners
General
Hot water production
There are three different comfort levels that can be
selected depending on how much water is needed and
how hot the water is required to be. Select in menu
”SETTINGS” > ”COMFORT”.
The three comfort levels for hot water production are:
ECO, NORMAL and HIGH.
ECO: This only heats the top part of the storage
boiler to a standard 56 °C, so that the heat
pump works very economically. If you regu-
larly experience a shortage of hot water
in this mode, choose one of the following
modes.
NORMAL: This heats the complete storage boiler to
a standard 56°C so that there is more hot
water available for showers, baths etc.
HIGH: This heats the complete storage boiler to a
standard 61°C which offers maximum hot
water comfort.
Periodic hot water increase
When periodic hot water increase is active, the heat
pump will charge the boiler with a water temperature
of 62 °C until the bottom temperature has been higher
than 60 °C for more than an hour. Then it resumes the
level that applied before activation. This protects against
the growth of legionella bacteria.
The increase is activated automatically at intervals that
depend on the selected setting in menu ”SETTINGS”
> ”LEGIO” > ”LEG.INTV”. The menu is a service menu
and settings are normally made by the installer.
Ventilation
The fan speed in FIGHTER 120 can be selected between
three preset modes.
A change of fan speed can be made using the remote
control (see section ”General” – ”Remote control”).
LOW: Reduced ventilation. Should be used tem-
porarily when a lower ventilation flow in the
house is acceptable, for example, when no-
body is in the house. This mode should not
be used for long periods, as there is a risk of
a poor indoor climate and moisture damage
in the house.
MEDIUM: Should normally be used.
HIGH: Forced ventilation. Should be used tempo-
rarily when a higher ventilation flow in the
house is required, for example, when many
people are in the house. This mode should
not be used for long periods, as the house’s
energy requirement and therefore running
costs increases.
Basic settings

8NIBE FIGHTER 120
For Home Owners
Maintenance routines
The heat pump and its ventilation ducting require some
regular maintenance when the following points should
be checked:
The numbers in brackets refer to section "List of com-
ponents".
Cleaning the air filter
The heat pump air filter should be cleaned regularly
(about four times a year) by taking it out and shaking
off any dirt. If the filter is very dirty, turn it upside-down
and wash it carefully with water.
QThe front cover is removed by pulling out the upper
and lower edges and then lifting it out.
QSet the switch to “0”.
QRelease the filter holder by turning the black knob a
quarter of a turn anti-clockwise.
QPull out the holder, take out the filter and shake off
any dirt. Check that the filter is not damaged. New
original filters can be ordered from NIBE.
QCarry out assembly in reverse order.
The cleaning time intervals vary depending on the
amount of dust in the exhaust air.
The heat pump triggers an alarm when it is time to
clean the air filter.
Cleaning the ventilation devices
The ventilation devices in the house should be cleaned
regularly to maintain the correct ventilation. The device
settings must not be changed.
NOTE! If you take down more than one ventilation de-
vice for cleaning, do not mix them up.
Emptying the hot water heater
QCut the power supply and shut-off the cold water
supply.
QThe hot water heater is emptied by opening the sa-
fety valve.
QTo supply air to the water heater, open the venting
valve (104) and a hot water tap as close to the unit
as possible.
If this is not sufficient, the compression ring coupling
by connection (74) on the hot water heater can be
released carefully.
LEK
Checking safety valves
The system’s safety valve sometimes releases water after
hot water has been tapped. This is because the cold
water, which enters the water heater to replace the hot
water, expands when heated causing the pressure to
rise and the safety valve to open.The overflow water
pipe from the safety valve must be visible and must not
be obstructed. The safety valve must be checked regu-
larly according to the manufacturer instructions. Check
as follows:
QOpen the valve.
QCheck that water flows through the valve.
QClose the valve again.

9NIBE FIGHTER 120
For Home Owners
Troubleshooting
Dealing with malfunctions
Alarm no. Alarm Alarm description Action
10 T1 OPEN Upper hot water sensor (87) is defective. Contact installer.
11 T1 SHORT Upper hot water sensor (87) is short-circuited. Contact installer.
12 T2 OPEN Evaporation sensor (86) is defective. Contact installer.
13 T2 SHORT Evaporation sensor (86) is short-circuited. Contact installer.
14 T3 OPEN Flow line sensor (89) is defective. Contact installer.
15 T3 SHORT Flow line sensor (89) is short-circuited. Contact installer.
16 T4 OPEN Lower hot water sensor (88) is defective. Contact installer.
17 T4 SHORT Lower hot water sensor (88) is short-circuited. Contact installer.
33 HIGH PRS High pressure pressostat has detected too high pressure in the cooling sec-
tion. The alarm automatically becomes inactive when the pressure drops back
to the permitted level.
No action.
34 HIGH PRS High pressure pressostat has detected high pressure 3 times within one hour.
The alarm must be acknowledged manually.
Contact installer.
50 FROST Upper hot water sensor (87) has been below 1 ˚C. Automatically inactive
when the sensor exceeds 5 ˚C.
Contact installer.
54 OVERHEAT Upper hot water sensor (87) has been above 95 ˚C. Automatically inactive
when the sensor falls below 92 ˚C.
Contact installer.
80 FILTER Replace or clean air filter. Indication occurs 90 days (default value) after ack-
nowledging the last filter alarm.
Replace/clean air filter.
Alarms
Symptom Cause Action
Low temperature or a lack
of hot water
Circuit or main MCB tripped. Check and replace blown fuses.
Switch (8) set to 0. Set the switch to 1.
Closed or throttled shut-off valve for the hot
water heater.
Open shut-off valve.
High hot water usage. Wait a few hours and check if the hot water
temperature rises. Possibly set the comfort level
higher.
Tripped high pressure pressostat (49). Contact installers in the event of recurring cases.
Low or a lack of ventilation Filter (63) clogged. Clean or replace the air filter.
Closed or too hard throttled exhaust air device. Open exhaust air devices.
Circuit or main MCB tripped. Check and replace blown fuses.
Fan clogged. Clean fan.
Remote control does not
work
Discharged batteries. Replace the batteries.
The remote control is outside range (red lamp
flashes during 8 seconds when button is pressed).
Move closer to the heat pump.
The remote control is not registered in the heat
pump.
Contact installers or register the remote control
according to ”Installation” – ”General informa-
tion for the installer” – ”Registering remote
control”.
The compressor does not
start
Minimum time between compressor starts has
not been reached.
Wait 30 minutes and check if the compressor
starts.
The compressor’s internal motor protection has
tripped.
No action usually required. In recurring cases,
the installer should be contacted.
Alarm tripped. See section ”Alarms”.
Alarms are shown in the display by the background
lighting flashing and text in the main menu shifting be-
tween status and current alarm.
The table below describes the alarms that can occur
during control.
Acknowledging alarms
When an alarm has been triggered, it can be acknowl-
edged by switching the switch off and on for FIGHTER
120. The alarm then stops.
NOTE! Recurring alarms mean that there is a fault in the
installation. Contact your installer!

10 NIBE FIGHTER 120
For the Installer
Installation
Refrigerant system
All work in and around the cooling circuit must be car-
ried out by an authorised refrigeration technician.
Calcium
When FIGHTER 120 circulates and heats up fresh water,
calcium and other minerals can affect the components’
(condenser, valves and circulation pump) cleaning cycle/
service life. If FIGHTER 120 is installed in calcium hard
water areas, some form of descaler should be installed
in the system.
LEK
Alt. 1
Alt. 2
General information for the installer
Alternative connection installation
The ventilations connections on FIGHTER 120 can be
installed partially upwards (factory installed,) partially
laterally. Due to limited space where it is difficult to
connect the ventilation ducts, the connections can be
made from the side. To facilitate servicing, however, it
is recommended to leave 20 – 30 cm above the heat
pump, as the fan and electronics are serviced most eas-
ily from above.
NOTE!
The heat pump’s switch (8) must not be
moved to position 1 until the water heater
has been filled. Otherwise there is a risk of
damaging the heat pump’s components.
NOTE!
448 mm
LEK
Transport and storage
The air treatment section and water heater must be
transported and stored upright and dry.
Installation/Suspension
The air treatment section and water heater are installed
near floor drains, free standing (minimum 10 mm from
walls) and with the back against an outside wall in a
utility room or similar type of room to minimise any
noise nuisance. If it is not possible to mount the heat
pump against an outside wall avoid a wall connecting
to a bedroom or living-room.
The water heater is installed standing on the floor.
Route pipework so it is not fixed to an internal wall that
backs on to a bedroom or living room.
The air treatment section can either be hung on a wall,
using the supplied plastic mountings, or fasten with
screw on brackets. When suspending on the plastic
mountings, first install the mountings on the wall as
illustrated below, then hang the air treatment section
up.Then screw the unit to the wall via the lower mount-
ings (see image below).
Check that the mountings are located in
their applicable grooves on the air treat-
ment section.
Ensure that the air treatment unit is
installed horizontally.

11NIBE FIGHTER 120
For the Installer
QTo make the installation economical, NIBE recom-
mends that all pipes between the air treatment sec-
tion and the water heater are insulated. Insulation
should be at least 12 mm thick.
QInternal support bushes should be fitted when a
plastic pipe or annealed copper pipe is used.
QWater from the condensed water outlet (92) is
routed to a drain using the supplied plastic
hose and hose clamp. Shape the hose into
a water seal (see image). Overflow water
from safety valves goes via overflow cups
to a drain so that hot water splashes can-
not cause injury.
QThe pipe installation must be carried out in
accordance with current norms.
QMaximum pipe length between the air
treatment section and water heater (forwards and
backwards) is 15 m.
QThe pressure vessel in FIGHTER 120 is approved for
max 9.0 bar (0.9 MPa).
Installation
LEK
73
75 74
Connection
The enclosed kit includes suitable connectors that can
be used for the installation.
QInstall the T-coupling in position (73) (blue) according
to image below. If Ø15 mm pipes are used, the en-
closed internal reducers can be used.
QConnect the return line from pos (70) (blue) on the
air treatment section to the right angled connection
on the T-coupling. Install the enclosed non-return
valve on this pipe. The supplied circulation pump
must also be installed as low as possible, close to the
exchange valve. Note the direction of flow.
QInstall a shut-off valve on the incoming cold water
pipe.
QInstall a safety valve after the shut-off valve on the
incoming cold water pipe.
QConnect the incoming cold water to the T-coupling.
QStraight couplings, 22/15 mm, are installed on con-
nections (74) and (75) as illustrated.
QConnect the flow line from pos (71) (white) on the
air treatment section to pos (75) (white) on the wa-
ter heater section.
QHot water connection to pos (74) (red) on the water
heater.
Pipe installation
LEK
FrånluftAvluft
Kallvatten
Varmvatten
70
71
92
Extract air Exhaust air Hot water
Cold water

12 NIBE FIGHTER 120
For the Installer
Installation
Exhaust air devices
To obtain the necessary air exchange in every room of
the house, the exhaust air devices must be correctly
positioned and adjusted. A defective ventilation installa-
tion may lead to reduced heat pump efficiency and thus
poorer operating economy, and may result in damage to
the house.
Duct installation
To prevent fan noise being transferred to the exhaust air
devices, it may be a good idea to install a silencer in the
duct. This is especially important if there are exhaust air
devices in bedrooms.
FIGHTER 120 is connected so that all ventilation air
except the kitchen fan passes the evaporator (62) in the
heat pump.
Connections must be made using flexible hoses, which
should be stretched well and routed to allow easy re-
placement. The extract air duct must be provided with
diffusion-tight insulation over its entire length. Provision
must be made for inspection of the duct. Make sure
that there are no reductions of cross-sectional area
in the form of creases, tight bends etc, since this will
reduce the ventilation capacity. All joins in the ducting
must be sealed and pop-riveted to prevent leakage. The
duct system must be carried out in accordance with cur-
rent norms. A minimum of air tightness class B is recom-
mended.
Filling the hot water heater
Fill the hot water heater during commissioning as fol-
lows:
QOpen a hot water tap.
QOpen the shut-off valve completely. This valve should
then be fully open during operations.
QClose the hot water tap when water without mixed
air flows from it.
QOpen the venting valve (104) until the water without
mixed air come out.
Emptying the hot water heater
QCut the power supply and shut-off the cold water
supply.
QThe hot water heater is emptied by opening the sa-
fety valve.
QTo supply air to the water heater, open the venting
valve (104) and a hot water tap as close to the unit
as possible.
If this is not sufficient, the compression ring coupling
by connection (74) on the hot water heater can be
released carefully.
LEK
104
The heat pump’s switch(8) must
not be moved to position 1 until
the water heater has been filled.
Otherwise there is a risk of damag-
ing the heat pump’s components.
NOTE!
A duct in a masonry chimney stack
must not be used for extract air.
NOTE!
Ensure that the circulation pump is filled
with water before the heat pump switch (8)
is set to 1.
NOTE!

13NIBE FIGHTER 120
For the Installer
Installation
Electrical connections
All electrical equipment is connected at the factory.
Installation must be carried out in accordance with cur-
rent norms and directives.
The heat pump is connected to an earthed socket with
the factory installed power cord that is supplied with
connection plug. When working behind screwed covers,
the circuit fuse must be removed or the connection plug
pulled out.
Work behind screwed covers may only be carried out
under the supervision of a qualified electrician.
Disconnect the heat pump before insulation testing the
house wiring.
Sensor connection
QConnected the enclosed sensors to the round sleeves
that are hanging on the reverse of the air treatment
section. If the sensor cables have to be lengthened,
a two-wire cable with an area of at least 0,5 mm2
should be used.
QPlace the sensor marked ”Top sensor 1” in sub-
merged tube (87) and the sensor marked ”Bottom
sensor 2” in submerged tube (88) in the hot water
heater.
LEK
73
88
87
96
75 74
LEK
”Top sensor 1” ”Bottom sensor 2”
The heat pump’s switch(8) must
not be moved to position 1 until
the water heater has been filled.
Otherwise there is a risk of damag-
ing the heat pump’s components.
NOTE!
Circulation pump connection
Install the supplied circulation pump close to the heater,
as low as possible. Connect the pump in the supplied
connector (105), which is connected to FIGHTER 120.
The connector must be installed in close proximity to
FIGHTER 120. Connect according to the colour codes on
the conductors at the respective cable.

14 NIBE FIGHTER 120
For the Installer
Commissioning and adjusting
Commissioning Adjusting the pump flow
In order to regulate the heat pump’s circulation pump
correctly, the trim valve must be adjusted at installation.
This valve is factory set, however, the valve may need
adjusting depending on the distance between the air
treatment section and the water heater and dimensions
of pipes.
A correctly set valve can be checked by allowing the
heat pump heat up the water heater from cold. Carry
out the following:
QDrain 30 – 50 l to make sure that there is cold water
in the bottom of the water heater
QAllow the heat pump (compressor) to start and wait
for 15 minutes for all values to stabilise
QEnter menu ”VIEW” and check that:
– ”T BOTTOM” is less than 15 °C (If not – drain
more water)
– ”T FORWD” = Set value +/- 2 °C (standard 57 °C).
– ”PUMP SPD” = 5 % – 20 %
If ”T FORWD” is lower than the set value or ”PUMP
SPD” is less than 5 %, the trim valve (81) must be
throttled more. Close the valve in increments of 1/8 of a
turn, wait 5 minutes and read off the menus as above.
Repeat until the conditions above are fulfilled.
If ”PUMP SPD” is greater than 20 % the valve should
be opened further. Open the valve in increments of 1/8
of a turn, wait 5 minutes and read off the menus as
above. Repeat until the conditions above are fulfilled.
The heat pump’s switch(8) must
not be moved to position 1 until
the water heater has been filled.
Otherwise there is a risk of damag-
ing the heat pump’s components.
NOTE!

15NIBE FIGHTER 120
For the Installer
Commissioning and adjusting
Hot water settings
NOTE! The temperature levels for the hot water are
factory set and normally do not need to be changed. In
certain cases, changes can be made as follows:
Temperature levels for the three comfort levels, ECO,
NORMAL and HIGH are set in the menu system. First
activate the comfort level in question.
ECO
The heat pump supplies hot water to the top of the
water heater. The temperature of the supplied hot wa-
ter can be changed in menu ”SETTINGS.” > ”PUMP” >
”FWD”. The factory setting is 56°C.
The compressor is switched on and off by the upper hot
water sensor (87).
Cut-off temperature is set in menu ”SET ECO”. The fac-
tory setting is 53 °C.
Cut-in temperature is set in menu ”SETTINGS” >
”HEATPUMP” > ”T DIFF” where the cut-in temperature
is ”SET ECO” - ”T DIFF”. The factory setting is 4 °C.
NORMAL
The heat pump supplies hot water to the top of the
water heater. The temperature of the supplied hot wa-
ter can be changed in menu ”SETTINGS.” > ”PUMP” >
”FWD”. The factory setting is 56°C.
The compressor is cut-in and cut-out by the lower hot
water sensor (88).
Cut-off temperature is set in menu ”SET NORM”. The
factory setting is 53 °C.
Cut-in temperature is set in menu ”SETTINGS” >
”HEATPUMP” > ”T DIFF” where the cut-in temperature
is ”SET NORM” - ”T DIFF”. The factory setting is 4 °C.
HIGH
The heat pump supplies hot water to the top of the
water heater. The temperature of the supplied hot wa-
ter can be changed in menu ”SETTINGS.” > ”PUMP” >
”FWD”. The factory setting is 61 °C.
The compressor is cut-in and cut-out by the lower hot
water sensor (88).
Cut-off temperature is set in menu ”SET HIGH”. The
factory setting is 57 °C.
Cut-in temperature is set in menu ”SETTINGS” >
”HEATPUMP” > ”T DIFF” where the cut-in temperature
is ”SET NORM” - ”T DIFF”. The factory setting is 4 °C.
Periodic hot water increase
When periodic hot water increase is active, the heat
pump will charge the boiler with a water temperature
of 62 °C until the bottom temperature has been higher
than 60 °C for more than an hour.. Then it resumes the
level that applied before activation. This protects against
the growth of legionella bacteria.
The ”SETTINGS” > ”LEGIO” > ”LEG.INTV” menu in-
dicates how often the increase is to be activated. The
interval is adjustable between 1 and 30 days. The func-
tion can also be deselected by selecting AV. The factory
setting is 14 days.
Service menus
Some of the menus in the following section are service
menus, which means that they cannot be accessed from
the start. These menus must only be used by those with
sufficient knowledge about the heat pump and its func-
tions.
The service menus are activated as follows:
Go to the SETTINGS menu and press and hold the con-
trol knob in for 5 seconds. The service menus are now
activated.
The service menus are deactivated automatically after
10 minutes of inactivity, or manually by repeating the
procedure for activation.
Registering remote control
To prevent the remote control from being interrupted
by other nearby units, it must be registered by the heat
pump’s internal controller. This is normally carried out at
the factory, but may also have to be done after service.
Select ”SEARCH” in menu ” SETTINGS” > ”REMOTE”.
The button on the remote control must be depressed
and held depressed within 5 seconds until the remote
control’s serial number is shown in the heat pump dis-
play. This is also acknowledged on the remote control,
all lamps light for a short time.

16 NIBE FIGHTER 120
For the Installer
Commissioning and adjusting
Adjusting the ventilation flow
The installer must make any adjustments to the three
ventilation speeds. Each speed can be adjusted be-
tween 30 and 100 %. See the fan diagram below for
desired fan capacity. The percentage of the curves refer
to the setting in the menu. The menus below are under
”SETTINGS” > ”FAN”.
QThe ventilation flow of the building under normal
conditions is set with ”MED”.
QReduced ventilation (”LOW”) is set so that the heat
pump’s minimum permitted volume flow does not
fall below (75 m3/h).
QForced ventilation (”HIGH”) is set as desired. Note
that high fan speeds affect the noise level in the ven-
tilation system.
The fan mode for when the compressor is running is set
in menu ”CPR ON”. The fan mode for when the com-
pressor is shut-off is set in menu ”CPR OFF”. A tempo-
rary change of fan speed can be made using the remote
control(see section ”General” – ”Remote control”).
Minimum flow should conform to the demands as set
out in applicable norms. For optimum fan operation the
ventilation flow must not fall below 75 m3/h (20 l/s).
Fan diagram
The diagram below shows the available ventilation
capacity.
m3/h
l/s
Tillgängligt statiskt tryck, Pa
Fläkteffekt,W
0
100
200
300
400
500
0 50 100 150 200 250 300 350
0 10 25 40 55 70 85 100
0
25
50
75
100
125
100%
100%
90%
80%
70%
60%
50%
40%
90%
80%
70%
60%
50%
40%
Available static pressure, Pa
Fan output, W

17NIBE FIGHTER 120
Miscellaneous
Control
All navigation between menus and change of adjustable
parameters is carried out using the control knob. Menus
with an arrow in the lower right-hand corner contain
sub-menus. To view the sub-menus press the control
knob in once. To return to a higher menu level, each
level ends with ”MENU UP”. Pressing the control knob
in once jumps one level up in the menu tree.
Press the control knob in once to change parameter
in the menus. The number/text starts to flash, which
means that the value/option can be changed by turning
the control knob clockwise or anticlockwise. To confirm
the changes press the control knob in once.
Example
To change the setting of the remote control’s return
time speed, carry out the following:
QTurn the knob until ”SETTINGS” is shown in the
display.
QPress the knob to enter the sub-menu.
QTurn the knob until ”RETURN” is displayed.
QPress the knob to activate value changing.
QTurn the knob to select the desired value.
QPress the knob to confirm the change.
QTurn the knob to access ”MENU UP”.
QPress the knob to go up a level in the menu tree and
to return to the start.
Service menus
Note that several of the menus are service menus, which
means that they cannot be accessed at the starting
point. These menus must only be used by those with
sufficient knowledge about the heat pump and its func-
tions.
The service menus are activated as follows:
Go to the SETTINGS menu and press and hold the con-
trol knob in for 5 seconds. The service menus are now
activated.
The service menus are deactivated automatically after
10 minutes of inactivity, or manually by repeating the
procedure for activation.
Navigation
Menus
T WATER
STATUS
SET ECO
SET NORM
SET HIGH
VIEW MENU UP 2
T TOP
T BOTTOM
T FORWD
T EVAP
PUMP SPD
FAN
MENU UP 2
SETTINGS MENU UP 2
RETURN
COMFORT
LANGUAGE
HEATPUMP MENU UP 2
MAX HW
T DIFF
RESTART
MENU UP 2

18 NIBE FIGHTER 120
Miscellaneous
Control
Menus Setting range Factory settings
T WATER – –
STATUS – –
SET ECO 5 – 65 °C 53 °C
SET NORM 5 – 65 °C 53 °C
SET HIGH 5 – 65 °C 57 °C
VIEW MENU UP 2
T TOP – –
T BOTTOM – –
T FORWD – –
T EVAP – –
PUMP SPD – –
FAN – –
MENU UP 2
SETTINGS MENU UP 2
RETURN --- / 1 – 150 h 1 h
COMFORT ECO/NORM/HIGH NORM
LANGUAGE ENGLISH/SWEDISH/DANISH/
DUTCH
ENGLISH
HEATPUMP MENU UP 2
MAX HW 40 – 65 °C 65 °C
T DIFF 1 – 10 °C 4 °C
RESTART 1 – 30 minutes 12 min
MENU UP 2
DEFROST MENU UP 2
DEF.TIME 10 – 60 minutes 30 min
FAN LOW/MED/HIGH MED
MENU UP 2
LEGIO MENU UP 2
LEG.INTV OFF / 1 – 30 days 7 days
MENU UP 2
S E R V I C E M E N U S