Nibe F1126 User manual

IHB EN 2008-1
531657
INSTALLATION MANUAL
Ground source heat pump
NIBE F1126

Quick guide
Navigation
Ok button (confirm/select)
Back button (back/undo/exit)
Control knob (move/increase/reduce)
A detailed explanation of the button functions can be found on page 30.
How to scroll through menus and make different settings is described on page 32.
Set the indoor climate
2X
INDOOR CLIMATE
HEAT PUMP
INFO
HOT WATER
temperature1.1.1
The mode for setting the indoor temperature is accessed by pressing the OK button twice, when in the start
mode in the main menu.
Increase hot water volume
2X
1X
INDOOR CLIMATE
HEAT PUMP
INFO
HOT WATER
off
temporary lux2.1
3 hrs
6 hrs
12 hrs
one time increase
To temporarily increase the amount of hot water (if a hot water heater is installed to your F1126), first turn the
control knob to mark menu 2 (water droplet) and then press the OK button twice.

41 Important information
4Safety information
4Symbols
4Marking
5Serial number
5Recovery
5Environmental information
6Inspection of the installation
72 Delivery and handling
7Transport
7Assembly
8Supplied components
8Removing the covers
93 The heat pump design
9General
10Distribution boxes
11Cooling section (EP14)
124 Pipe connections
12General
13Dimensions and pipe connections
14Brine side
14Heating medium side
15Cold and hot water
15Docking alternatives
175 Electrical connections
17General
19Connections
21Settings
22Optional connections
24Connecting accessories
256 Commissioning and adjusting
25Preparations
25Filling and venting
25Start-up and inspection
28Setting the heating curve
307 Control - Introduction
30Display unit
31Menu system
348 Control - Menus
34Menu 1 - INDOOR CLIMATE
34Menu 2 - HOT WATER
34Menu 3 - INFO
35Menu 4 - HEAT PUMP
36Menu 5 - SERVICE
409 Service
40Service actions
4610 Disturbances in comfort
46Manage alarm
46Troubleshooting
4911 Accessories
5012 Technical data
50Dimensions and setting-out coordinates
51Electrical data
52Technical specifications
54Energy labelling
58Electrical circuit diagram
63Item register
67Contact information
3Table of ContentsNIBE F1126
Table of Contents

Safety information
This manual describes installation and service proced-
ures for implementation by specialists.
The manual must be left with the customer.
This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or mental
capabilities or lack of experience and
knowledge if they have been given super-
vision or instruction concerning use of the
appliance in a safe way and understand
the hazards involved. Children shall not
play with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2020.
Water may drip from the safety valve’s
overflow pipe. The entire length of the over-
flow water pipe must be routed to a suitable
drain and be inclined to prevent water pock-
ets, and must also be frost-proof. The over-
flow pipe must be at least the same size as
the safety valve. The overflow pipe must be
visible and its mouth must be open and not
located close to electrical components.
F1126 must be installed via an isolator
switch. The cable area has to be dimensioned
based on the fuse rating used.
Symbols
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should consider when installing
or servicing the installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
The CE mark is obligatory for most products sold
in the EU, regardless of where they are made.
CE
Classification of enclosure of electro-technical
equipment.
IPX1B
Danger to person or machine.
!
Read the User Manual.
NIBE F1126Chapter 1 | Important information4
1 Important information

Serial number
The serial number can be found at the bottom right of
the front cover, in the info menu (menu 3.1) and on the
type plate (PZ1).
Serial number
Caution
You need the product's ((14 digit) serial number
for servicing and support.
Recovery
Leave the disposal of the packaging to the in-
staller who installed the product or to special
waste stations.
Do not dispose of used products with normal
household waste. It must be disposed of at a
special waste station or dealer who provides this type
of service.
Improper disposal of the product by the user results in
administrative penalties in accordance with current le-
gislation.
Environmental
information
F-GAS REGULATION (EU) NO. 517/2014
This unit contains a fluorinated greenhouse gas that is
covered by the Kyoto agreement.
The equipment contains R407C, a fluorinated green-
house gas with a GWP value (Global Warming Potential)
of 1,774. Do not release R407C into the atmosphere.
5Chapter 1 | Important informationNIBE F1126

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must
be carried out by a suitably qualified person.
In addition, fill in the page for the installation data in the User Manual.
DateSignatureNotesDescription
✔
Brine (page 14)
System flushed
System vented
Antifreeze
Level/Expansion vessel
Particle filter
Safety valve
Shut off valves
Circulation pump setting
Heating medium (page 14)
System flushed
System vented
Expansion vessel
Particle filter
Safety valve
Shut off valves
Circulation pump setting
Electricity (page 17)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Safety breaker
Earth circuit-breaker
Setting of emergency mode thermostat
NIBE F1126Chapter 1 | Important information6

Transport
F1126 should be transported and stored vertically in a
dry place. When being moved into a building, F1126
may be leant back 45 °.
Ensure that F1126 has not been damaged during trans-
port.
Caution
The product can be tail heavy.
If the cooling module is pulled out and transported up-
right, F1126 can be transported on its back.
Remove the outer panels in order to protect them when
moving in confined spaces inside buildings.
R
0
R
0
EXTRACTING THE COOLING MODULE
To simplify transport and service, the heat pump can be
separated by pulling the cooling module out from the
cabinet.
See page 42 for instructions about the separation.
Assembly
• Place F1126 on a solid foundation indoors that can
take the heat pump's weight. Use the product's ad-
justable feet to obtain a horizontal and stable set-up.
30 - 50 mm
30 - 50 mm
15 - 40 mm
20-55 mm
• Because water comes from F1126, the area where
the heating pump is located must be equipped with
floor drainage.
•Install with its back to an outside wall, ideally in a room
where noise does not matter, in order to eliminate
noise problems. 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.
INSTALLATION AREA
Leave a free space of 800 mm in front of the product.
Approx. 50 mm free space is required on each side, to
remove the side panels (see image). The panels do not
need to be removed during service. All service on F1126
can be carried out from the front. Leave space between
the heat pump and the wall behind (and any routing of
supply cables and pipes) to reduce the risk of any vibra-
tion being propagated.
(50) (50)
800
*
*
* A normal installation needs 300 – 400 mm (any side) for connection
equipment, valves and electrical equipment.
7Chapter 2 | Delivery and handlingNIBE F1126
2 Delivery and handling

Supplied components
O-rings
LEK
Safety valve
0.3 MPa (3 bar)
Outside sensor
Temperature
sensor
WILO
LEK
LEK
WILO
WILO
2,5(22)
H- 50 - 2,5
TUV-SV-97-525
WILO
LEK
LEK
WILO
WILO
2,5(22)
H- 50 - 2,5
TUV-SV-97-525
Particle filter
LEK
Level vessel
22 28
Compression ring
couplings
6-8 kW
2 x (ø28 x G25)
2 x (ø22 x G20)
12 kW
4 x (ø28 x G25)
LOCATION
The kit of supplied items is placed in packaging on top
of the heat pump.
Removing the covers
FRONT COVER
1
2
LEK
LEK
LEK
LEK
LEK LEK
1. Remove the screws from the lower edge of the
front panel.
2. Lift the panel out at the bottom edge and up.
SIDE COVERS
LEK
LEK
LEK
The side covers can be removed to facilitate the install-
ation.
1. Remove the screws from the upper and lower
edges.
2. Twist the cover slightly outward.
3. Move the hatch outwards and backwards.
4. Assembly takes place in the reverse order.
NIBE F1126Chapter 2 | Delivery and handling8

General
F1145
PF1
QN10
BT2
EB1
UB1
QM34
QM31
XL1
XL6
XL9
XL7
XL2
UB3
AA4
W130
SF1
AA4-XJ4
AA4-XJ3
UB2
QM32
QM33
PF2
EP14-AA11
EP14
PIPE CONNECTIONS
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Connection, hot water heaterXL9
HVAC COMPONENTS
Shut-off valve, heating medium flowQM31
Shut off valve, heating medium returnQM32
Shut off valve, brine outQM33
Shut-off valve, brine inQM34
Shuttle valve, climate system/water heaterQN10
SENSORS ETC.
Outdoor temperature sensor*BT1
Temperature sensors, heating medium flowBT2
* Not illustrated
ELECTRICAL COMPONENTS
Display unit
AA4-XJ3 USB socket
AA4-XJ4 Service outlet (No function)
AA4
Motor moduleAA11
Immersion heaterEB1
SwitchSF1
MISCELLANEOUS
Cooling sectionEP14
Rating platePF1
Type plate, cooling sectionPF2
Cable gland, incoming electricityUB1
Cable glandUB2
Cable gland, rear side, sensorUB3
Designations according to standard EN 81346-2.
9Chapter 3 | The heat pump designNIBE F1126
3 The heat pump design

Distribution boxes
F1126
FQ10
AA1
FC1
X1
AA2
ELECTRICAL COMPONENTS
Immersion heater cardAA1
Base cardAA2
Miniature circuit-breakerFC1
Temperature limiter/Emergency mode thermostatFQ10
Terminal blockX1
MOTOR MODULE (AA11)
3x400 V 6-8 kW
LEK
LEK
LEK
FC1
AA10
3x400V 12 kW
FC10 AA10
ELECTRICAL COMPONENTS
Soft-start cardAA10
Miniature circuit-breakerFC1
Motor cut-outFC10
* 5 kW has auxiliary switch for motor protection breaker.
NIBE F1126Chapter 3 | The heat pump design10

Cooling section (EP14)
6&8kW
GP1
BT3
QM1
BT10
GP2
BT11
QM2
AA100
BT12
12 kW
UN
BT12
GP2
GP1
BT3
QM1
BT10
BT11
QM2
6&8kW
EP2
BT17
BT14
BT15
BP1
XL20
EP1
GQ10
HS1
BP2
XL21
QN1
EB10
12 kW
UN
EP2
BT14
BT17
BP2
BT15
BP1
EB10
EP1
GQ10
HS1
XL21
QN1
XL20
PIPE CONNECTIONS
Service connection, high pressureXL20
Service connection, low pressureXL21
HVAC COMPONENTS
Circulation pumpGP1
Brine pumpGP2
Drainage, climate systemQM1
Draining, brine sideQM2
SENSORS ETC.
High pressure pressostatBP1
Low pressure pressostatBP2
Temperature sensors, heating medium returnBT3
Temperature sensor, brine inBT10
Temperature sensor, brine outBT11
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, suction gasBT17
ELECTRICAL COMPONENTS
Joint cardAA100
Compressor heaterEB10
COOLING COMPONENTS
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHS1
Expansion valveQN1
11Chapter 3 | The heat pump designNIBE F1126

General
Pipe installation must be carried out in accordance with
current norms and directives. F1126 can operate with
a return temperature of up to 56 °C and an outgoing
temperature from the heat pump of 70 (63 °C with only
the compressor).
F1126 is not equipped with external shut off valves;
these must be installed to facilitate any future servicing.
Caution
Ensure that incoming water is clean. When
using a private well, it may be necessary to
supplement with an extra water filter.
Caution
Any high points in the climate system, must
be equipped with air vents.
NOTE
The pipe systems need to be flushed out be-
fore the heat pump is connected so debris
cannot damage component parts.
NOTE
Water may drip from the safety valve’s over-
flow pipe. The entire length of the overflow
water pipe must be routed to a suitable drain
and be inclined to prevent water pockets, and
must also be frost-proof. The overflow pipe
must be at least the same size as the safety
valve. The overflow pipe must be visible and
its mouth must be open and not located close
to electrical components.
SYMBOL KEY
MeaningSymbol
Venting valve
Shut-off valve
Non-return valve
Circulation pump
Expansion vessel
Auxiliary relay
Compressor
Pressure gauge
Level vessel
Particle filter
Safety valve
Temperature sensor
Trim valve
Reversing valve/shunt
Heat exchanger
NIBE F1126Chapter 4 | Pipe connections12
4 Pipe connections

SYSTEM DIAGRAM
F1126 consists of heat pump, immersion heater, circu-
lation pumps and control system. F1126 is connected
to the brine and heating medium circuits.
In the heat pump evaporator, the brine (water mixed
with anti-freeze, glycol or ethanol) releases its energy
to the refrigerant, which is vaporised in order to be
compressed in the compressor. The refrigerant, of which
the temperature has now been raised, is passed to the
condenser where it gives off its energy to the heating
medium circuit and, if necessary, to any docked water
heater. If there is a greater need for heating/hot water
than the compressor can provide there is an integrated
immersion heater.
KBinVBf VBrVV KBut
XL1 XL6 XL7 XL2XL9
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Connection, hot water heaterXL9
Dimensions and pipe
connections
605
600
560
70
1475
725* 725*
25-50
25
55
130
460
535
405
440
605
600
560
70
1475
725* 725*
25-50
25
55
130
460
535
405
440
XL1 XL6 XL7XL9 XL2
PIPE DIMENSIONS
126-8(kW)Connection
28(mm)(XL6)/(XL7) Brine in/out ext Ø
2822(mm)(XL1)/(XL2) Heating medium
flow/return ext Ø
22(mm)(XL9) Connection, hot water heater
ext Ø
* Can be angled for side connection.
13Chapter 4 | Pipe connectionsNIBE F1126

Brine side
COLLECTOR
Caution
The length of the collector hose varies depend-
ing on the rock/soil conditions, climate zone
and on the climate system (radiators or under-
floor heating) and the heating requirement of
the building Each installation must be sized in-
dividually.
Max. length per coil for the collector should not exceed
400 m.
In those cases where it is necessary to have several
collectors, these should be connected in parallel with
the possibility for adjusting the flow of the relevant coil.
For surface soil heat, the hose should be buried at a
depth determined by local conditions and the distance
between the hoses should be at least 1 metre.
For several bore holes, the distance between the holes
must be determined according to local conditions.
Ensure the collector hose rises constantly towards the
heat pump to avoid air pockets. If this is not possible,
airvents should be used.
Because the temperature of the brine system can fall
below 0 °C, it must be protected against freezing down
to -15 °C. When making the volume calculation, use 1
litres of ready mixed brine per metre of collector hose
(applies when using PEM-hose 40x2.4 PN 6.3) as a guide
value.
SIDE CONNECTION
It is possible to angle the brine connections, for connec-
tion to the side instead of top connection.
To angle out a connection:
1. Disconnect the pipe at the top connection.
2. Angle the pipe in the desired direction.
3. If necessary, cut the pipe to the desired length.
CONNECTING THE BRINE SIDE
• Insulate all indoor brine pipes against condensation.
•The level vessel must be installed as the highest point
in the brine system on the incoming pipe before the
brine pump (Alt. 1).
If the level vessel cannot be placed at the highest
point, an expansion vessel must be used (Alt. 2).
NOTE
Note that condensation may drip from the level
vessel. Position the vessel so that this does
not harm other equipment.
• Details of the antifreeze used must be shown on the
level vessel.
•Install the enclosed safety valve below the level vessel
as illustrated.
• Install shut off valves as close to the heat pump as
possible.
• Fit the enclosed particle filter on the incoming brine.
TIP
If filling connection KB25/KB32 is used, the
enclosed filterball does not need to be fitted.
In the case of connection to an open groundwater sys-
tem, an intermediate frost-protected circuit must be
provided, because of the risk of dirt and freezing in the
evaporator. This requires an extra heat exchanger.
P
-QZ20
Alt. 1 Alt. 2
XL6
XL7
Heating medium side
CONNECTING THE CLIMATE SYSTEM
A climate system is a system that regulates indoor
comfort with the help of the control system in F1126
and for example radiators, underfloor heating/cooling,
fan convectors etc.
• Install all required safety devices, shut-off valves (as
close to the heat pump as possible), and supplied
particle filter.
NIBE F1126Chapter 4 | Pipe connections14

• Fit safety valve on heating medium return as illus-
trated. Recommended opening pressure is 0.25 MPa
(2.5 bar). For information about max opening pressure,
see technical specifications.
• When connecting to a system with thermostats on all
radiators (or underfloor heating coils), either a bypass
valve must be fitted or some of the thermostats must
be removed to ensure there is sufficient flow.
P
XL1
XL2
Cold and hot water
CONNECTING THE HOT WATER HEATER
NOTE
If F1126 is not docked to a water heater or if
it is to work with fixed condensing, the connec-
tion for the water heater (XL9) must be
plugged.
• Fit shut-off valve, non-return valve and safety valve as
illustrated.
•The safety valve must have a maximum 1.0 MPa (10.0
bar) opening pressure and be installed on the incoming
domestic water line as shown.
• A mixer valve must also be installed, if the factory
setting for hot water is changed. National regulations
must be observed.
• Hot water production is activated in the start guide or
in menu 5.2.
XL1
XL2
FIXED CONDENSING
If F1126 is to work towards a water heater with fixed
condensing, you must connect external supply temper-
ature sensor (BT25) according to the description on page
22. In addition, you must make the following menu
settings.
Menu setting (local vari-
ations may be required)
Menu
Desired temperature in the
tank.
1.9.3 - min. flow line temp.
Desired temperature in the
tank.
5.1.2 - max flow line temper-
ature
intermittent5.1.10 - op. mod heat med
pump
manual4.2 - op. mode
Docking alternatives
F1126 can be connected in several different ways, some
of which are shown below.
Further option information is available at nibe.eu and in
the respective assembly instructions for the accessories
used. See page 49 for a list of the accessories that can
be used with F1126.
BUFFER VESSEL
If the climate system volume is too small for the heat
pump output, the radiator system can be supplemented
with a buffer vessel, for example NIBE UKV.
GROUND WATER SYSTEM
An intermediate heat exchanger is used to protect the
heat pump's exchanger from dirt. The water is released
into a buried filtration unit or a drilled well. This docking
alternative requires the EXC 40 accessory.
If this docking alternative is used, "min. brine out" in
menu 5.1.7 "br pmp al set." must be changed to a suit-
able value to prevent freezing of the heat exchanger.
-EP12-GP3
-EP12-HQ40
-EP12-EP4
-EP12-AA25
-EP12
15Chapter 4 | Pipe connectionsNIBE F1126

VENTILATION RECOVERY
The installation can be supplemented with the exhaust
air module NIBE FLM to provide ventilation recovery.
• Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
• The brine system must be supplied with a pressure
expansion vessel. If there is a level vessel this should
be replaced.
P
FREE COOLING
The installation can be supplemented with fan con-
vectors, for example, in order to allow connections for
free cooling.
• Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
• Where the cooling demand is high, fan convectors
with drip trays and drain connection are needed.
• The brine system must be supplied with a pressure
expansion vessel. If there is a level vessel this should
be replaced.
UNDERFLOOR HEATING SYSTEM
The external circulation pump is dimensioned for the
under floor heating system’s demand.
If the climate system volume is too small for the heat
pump output, the underfloor heating system can be
supplemented with a buffer vessel, for example NIBE
UKV.
NIBE F1126Chapter 4 | Pipe connections16

General
All electrical equipment except for the outdoor temper-
ature sensors has been connected at the factory.
• Disconnect the heat pump before insulation testing
the house wiring.
• If the building is equipped with an earth-fault breaker,
F1126 should be equipped with a separate one.
• If a miniature circuit breaker is used this should have
at least motor characteristic “C”. See page 51 for fuse
size.
• Electrical wiring diagram for the heat pump, see page
58.
•Communication and sensor cables to external connec-
tions must not be laid close to high current cables.
• The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX or LiYY or equivalent.
• When cable routing in F1126, cable grommets (e.g.
UB1-UB3, marked in image) must be used. In
UB1-UB3 the cables are inserted through the heat
pump from the back to the front.
NOTE
The switch (SF1) must not be moved to "" or
" " until the boiler has been filled with water.
Components in the product could be damaged.
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician. Cut the current with the circuit
breaker before carrying out any servicing.
Electrical installation and wiring must be carried
out in accordance with the stipulations in force.
NOTE
Check the connections, main voltage and phase
voltage before the machine is started, to pre-
vent damage to the heat pump electronics.
F1145
FC1
FQ10 FQ10-SF2
AA11-FC10/FC1
UB1
UB3
UB2
MINIATURE CIRCUIT-BREAKER
The heat pump operating circuit and some of its internal
components are internally fused by a miniature circuit
breaker (FC1).
TEMPERATURE LIMITER
The temperature limiter (FQ10) cuts the power to the
electric additional heat if the temperature exceeds 89°C
and is reset manually.
Resetting
The temperature limiter (FQ10) is accessed behind the
front cover. Reset the temperature limiter by pressing
the button (FQ10-SF2) using a small screwdriver.
17Chapter 5 | Electrical connectionsNIBE F1126
5 Electrical connections

MOTOR PROTECTION BREAKER /MINIATURE
CIRCUIT BREAKER
Motor protection breaker (AA11-FC10) / miniature circuit
breaker (AA11-FC1) cuts the power to the compressor
if the current is too high. It is located behind the front
cover and is reset manually.
Caution
Check the miniature circuit-breaker, temperat-
ure limiter and motor protection breaker. They
may have tripped during transportation.
ACCESSIBILITY, ELECTRICAL CONNECTION
The plastic cap of the electrical boxes is opened using
a screwdriver.
NOTE
The cover for the terminal block for soft inputs
is opened using a Torx 20 screwdriver.
Removing the cover, terminal block
1. Unscrew the screws and angle out the cover.
LEK LEK
LEK LEK LEKLEK LEKLEK
LEK
LEK
LEK
LEK
2. Pull off the cover.
LEK LEK
LEK LEK LEKLEK LEKLEK
LEK
LEK
LEK
LEK
NIBE F1126Chapter 5 | Electrical connections18

Removing the hatch, electrical cabinet
1. Disconnect the contacts.
LEK
LEK
2. Unscrew the screws and angle out the cover.
LEK LEK
LEK LEK LEKLEK LEKLEK
LEK
LEK
LEK
LEK
3. Pull off the cover.
LEK LEK
LEK LEK LEKLEK LEKLEK
LEK
LEK
LEK
LEK
CABLE LOCK
Use a suitable tool to release/lock cables in the heat
pump terminal blocks.
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
1
2
Connections
NOTE
To prevent interference, unscreened commu-
nication and/or sensor to external connections
cables must not be laid closer than 20 cm to
high voltage cable when cable routing.
POWER CONNECTION
F1126 must be installed with a disconnection option on
the supply cable. Minimum cable area must be sized
according to the fuse rating used. Enclosed cable for
incoming supply electricity is connected to terminal block
X1 on the immersion heater board (AA1). All installations
must be carried out in accordance with current norms
and directives.
AA1-X1
Connection 3x400V
AA1-X1
PE1
L1 1 L2 L3PE0
N
19Chapter 5 | Electrical connectionsNIBE F1126

NOTE
F1126 contains scroll compressor, which
means that it is important that electrical con-
nections are made with the correct phase se-
quence. With the incorrect phase sequence,
the compressor does not start and an alarm is
displayed.
If a separate supply to the compressor and electric
heater is wanted, see section "External blocking of
functions" on page 24.
TARIFF CONTROL
If the voltage to the immersion heater and/or the com-
pressor disappears during a certain period, there must
also be blocking via the AUX-input, see "Connection
options - Possible selection for AUX inputs" page. 24
CONNECTING EXTERNAL OPERATING
VOLTAGE FOR THE CONTROL SYSTEM
NOTE
Mark up any junction boxes with warnings for
external voltage.
If you wish to connect external operating voltage for the
control system to F1126 on the immersion heater circuit
board (AA1) the edge connector at AA1:X2 must be
moved toAA1:X9 (as illustrated).
Operating voltage (1x230V ~ 50Hz) is connected to
AA1:X11 (as illustrated).
1 2 3 4 5 6
ON
L1 1 L2 L3PE
PE
0N
NL
1x230V+N+PE
1x230V+N+PE operating voltage
AA1
AA1-X8
AA1-X2
AA1-X9
AA1-X11
CONNECTING SENSORS
5 6 7 842 31 9 10
X1
Connect the sensor(s) to
terminal block X1 according
to the instructions below.
Outside sensor
Install the outdoor temperat-
ure sensor (BT1) in the
shade on a wall facing north
or north-west, so it is unaf-
fected by the morning sun
for example.
Connect the sensor to terminal block X1:1 and X1:2.
If a conduit is used it must be sealed to prevent condens-
ation in the sensor capsule.
5 6 7 842 31 9 10
BT1
X1
F1126
External
Temperature sensor, hot water charging
The temperature sensor, hot water charging (BT6) is
placed in the submerged tube on the water heater.
Connect the sensor to terminal block X1:9 and X1:10.
Use a 2 core cable of at least 0.5 mm² cable area.
Hot water charging is activated in menu 5.2 or in the
start guide.
5 6 7 8 9 10
BT6
F1126
X1
Temperature sensor, hot water top
A temperature sensor for hot water top (BT7 ) can be
connected to F1126 for showing the water temperature
at the top of the tank.
Connect the sensor to terminal block X1:7 and X1:8.
Use a 2 core cable of at least 0.5 mm² cable area.
5 6 7 8 9 10
BT7
F1126
X1
NIBE F1126Chapter 5 | Electrical connections20