Nibe F1226 series User guide

Installer manual
LEK
NIBE F1226
Ground source heat pump
IHB EN 1723-2
231652

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, first turn the control knob to mark menu 2 (water droplet) and
then press the OK button twice.

Table of Contents
41 Important information
4Safety information
62 Delivery and handling
6Transport
6Assembly
7Supplied components
7Removing the covers
8Removing parts of the insulation
93 The heat pump design
9General
10Distribution boxes
11Cooling section
134 Pipe connections
13General
14Dimensions and pipe connections
14Brine side
15Heating medium side
15Water heater
15Docking alternatives
185 Electrical connections
18General
20Connections
21Settings
22Optional connections
24Connecting accessories
256 Commissioning and adjusting
25Preparations
25Filling and venting
26Start guide
27Post adjustment and venting
28Setting the cooling/heating curve
307 Control - Introduction
30Display unit
31Menu system
348 Control - Menus
34Menu 1 - INDOOR CLIMATE
34Menu 2 - HOT WATER
34Menu 3 - INFO
34Menu 4 - HEAT PUMP
35Menu 5 - SERVICE
399 Service
39Service actions
4510 Disturbances in comfort
45Info-menu
45Manage alarm
45Troubleshooting
4711 Accessories
4812 Technical data
48Dimensions and setting-out coordinates
49Technical specifications
52Energy labelling
57Electrical circuit diagram
62Item register
67Contact information
3Table of Contents |NIBE F1226

Safety information
This manual describes installation and service procedures
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 per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand 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 2017.
Symbols
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your 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.
IP21
Danger to person or machine.
!
Read the User Manual.
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1) and on
the type plate (PF1).
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 legis-
lation.
Environmental information
This unit contains a fluorinated greenhouse gas that is
covered by the Kyoto agreement.
F-Gas Regulation (EU) No. 517/2014
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.
NIBE F1226Chapter 1 | Important information4
1 Important information

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 15)
System flushed
System vented
Expansion vessel
Particle filter
Safety valve
Shut off valves
Circulation pump setting
Electricity (page 18)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Safety breaker
Earth circuit-breaker
Setting of emergency mode thermostat
5Chapter 1 | Important informationNIBE F1226

Transport
F1226 should be transported and stored vertically in a
dry place. When being moved into a building, F1226
may be leant back 45 °.
Caution
The product can be tail heavy.
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 40 for instructions about the separation.
Assembly
■Position F1226 on a fixed foundation that can take the
weight of the heat pump. Use the product's adjustable
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 F1226, 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 F1226
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 connec-
tion equipment, i.e. level vessel, valves and electrical equipment.
NIBE F1226Chapter 2 | Delivery and handling6
2 Delivery and handling

Supplied components
O-rings
LEK
Safety valve
0.3 MPa (3 bar)
Outside sensor
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)
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
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 installa-
tion.
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.
7Chapter 2 | Delivery and handlingNIBE F1226

Removing parts of the
insulation
Parts of the insulation can be removed to facilitate the
installation.
Insulation, top
1. Disconnect the cable from the motor and remove
the motor from the shuttle valve as illustrated.
LEK
LEK
A
B
LEK
2. Grip the handle and pull straight out as illustrated.
LEK
Insulation, immersion heater
NOTE
Electrical installation and service must be carried
out under the supervision of a qualified electri-
cian. Electrical installation and wiring must be
carried out in accordance with the stipulations
in force.
1. Remove the cover for the junction box according to
the description on page 19.
2. Grip the handle and pull the insulation carefully to-
wards you as illustrated.
LEK
NIBE F1226Chapter 2 | Delivery and handling8

General
F1245
BT7
QN10
BT2
EB1
PF1
UB1
QM34
QM31
XL1
XL6
XL4
FR1
XL3
XL7
XL2
QM22
UB3
AA4
W130
SF1
AA4-XJ4
AA4-XJ3
BT6
UB2
QM32
QM33
PF2
View from above
XL5 BT7
Pipe connections
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, HWC*XL5
Connection, brine inXL6
Connection, brine outXL7
* Only heat pumps with stainless steel vessel.
HVAC components
Venting, coilQM22
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
Temperature sensor, hot water chargingBT6
Temperature sensor, hot water topBT7
* Not illustrated
Electrical components
Display unitAA4
AA4-XJ3 USB socket
AA4-XJ4 Service outlet (No function)
Immersion heaterEB1
SwitchSF1
Miscellaneous
Rating platePF1
Type plate, cooling sectionPF2
Cable gland, incoming electricityUB1
Cable glandUB2
Cable gland, rear side, sensorUB3
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
9Chapter 3 | The heat pump designNIBE F1226
3 The heat pump design

Distribution boxes
FB1
FD1
AA1
FA1
X1
AA2
Electrical components
Immersion heater cardAA1
Base cardAA2
Miniature circuit-breakerFA1
Motor cut-outFB1
Temperature limiter/Emergency mode thermostatFD1
Terminal blockX1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE F1226Chapter 3 | The heat pump design10

3x400 V 6-12 kW
FB1 AA10
Electrical components
Soft-start cardAA10
Motor cut-outFB1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
Cooling section
6 & 8 kW
UN
BT11
QM2
GP2
BT10
AA100
QM1
BT3
GP1
BT12
12 kW
UN
BT12
GP2
GP1
BT3
QM1
BT10
BT11
QM2
6 & 8 kW
UN
EP2
BT17
BT14
BP2
BT15
BP1
XL20
EP1
GQ10
HS1
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
11Chapter 3 | The heat pump designNIBE F1226

Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHS1
Expansion valveQN1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE F1226Chapter 3 | The heat pump design12

General
Pipe installation must be carried out in accordance with
current norms and directives. F1226 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).
F1226 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 supple-
ment with an extra water filter.
Caution
Any high points in the climate system, must be
equipped with air vents.
NOTE
The pipe system needs to be flushed out before
the heat pump is connected so that debris can-
not damage component parts.
Symbol key
MeaningSymbol
Venting valve
Shut-off valve
Non-return valve
Level vessel
Trim valve
Shunt / shuttle valve
Safety valve
Temperature sensor
Expansion vessel
Pressure gauge
P
Circulation pump
Particle filter
Auxiliary relay
Compressor
Heat exchanger
System diagram
F1226 consists of a heat pump, water heater, electrical
module, circulation pumps and a control system. F1226
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 com-
pressed in the compressor. The refrigerant, of which the
temperature has now been raised, is passed to the con-
denser where it gives off its energy to the heating medi-
um circuit and, if necessary, to the water heater. If there
is a greater need for heating/hot water than the com-
pressor can provide there is an integrated immersion
heater.
VVKV
KBinVBf VBr KBut
XL1 XL6 XL7XL4 XL3 XL2
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, brine inXL6
Connection, brine outXL7
13Chapter 4 | Pipe connectionsNIBE F1226
4 Pipe connections

Dimensions and pipe
connections
620
600
560 440
70
1775
650*
25-50
25
50
130
210
390
470
525
650*
620
600
560 440
70
1775
650*
25-50
25
50
130
210
390
470
525
650*
XL1 XL7XL4XL6 XL3 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)(XL3)/(XL4) Cold/hot water Ø
Brine side
Collector
Rock heat, recom-
mended active
drilling depth (m)
Surface soil heat, re-
commended collect-
or length (m)
Type
90-110250-4006 kW
120-145325-2x2508 kW
180-2102x250-2x35012 kW
Applies to PEM hose 40x2.4 PN 6.3.
These are rough example values. At installation the cor-
rect calculations must be made according to local condi-
tions.
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).
Max length per coil for the collector should not exceed
400 m.
In those cases where it is necessary to have several col-
lectors, 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.
* Can be angled for side connection.
NIBE F1226Chapter 4 | Pipe connections14

Connecting the brine side
■Insulate all indoor brine pipes against condensation.
■The level vessel must be installed at 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 under the level vessel
as illustrated. The entire length of the overflow water
pipe from the safety valve must be inclined to prevent
water pockets and must also be frost-free.
■Install shut off valves as close to the heat pump as
possible.
■Fit the supplied particle filter on the incoming pipe.
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
P
Collector
Alt. 1 Alt. 2
XL6
XL7
Heating medium side
Connecting the climate system
A climate system is a system that regulates indoor com-
fort with the help of the control system in F1226 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.
■The safety valve must have a maximum 0.25 MPa (2.5
bar) opening pressure and be installed on the heating
medium return as illustrated. The entire length of the
overflow water pipe from the safety valves must be
inclined to prevent water pockets and must also be
frost proof.
■When connecting to a system with thermostats on all
radiators, a relief valve must be fitted, or some of the
thermostats must be removed to ensure sufficient flow.
P
P
XL1 XL4 XL3 XL2
Water heater
Connecting the hot water heater
■The hot water heater in the heat pump must be sup-
plied with necessary set of valves.
■The mixing valve must be installed if the setting is
changed so that the temperature can exceed 60 °C.
■The setting for hot water is made in menu 5.1.1.
■The safety valve must have a maximum opening pres-
sure of 1.0 MPa (10.0 bar) and be installed on the in-
coming domestic water line as illustrated. The entire
length of the overflow water pipe from the safety valve
must be inclined to prevent water pockets and must
also be frost-free.
Docking alternatives
F1226 can be connected in several different ways, some
of which are shown below.
Further option information is available at www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 47 for a list of the accessories
that can be used with F1226.
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.
UKV
P
15Chapter 4 | Pipe connectionsNIBE F1226

Extra electric hot water heater
The heat pump should be supplemented with an electric
water heater, for example NIBE COMPACT, if a whirlpool
or other significant consumer of hot water is installed.
■The valve connection on COMPACT can be separated.
The mixing valve remains on COMPACT and the remain-
ing valve connector can be used for incoming cold
water in F1226.
VV
KV
COMPACT
CW
HW
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 in the heat exchanger.
Ventilation recovery
The installation can be supplemented with the exhaust
air module 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 (CM3). If there is a level vessel (CM2)
this should be replaced.
Frånluft
Ø 160
Avluft
Ø 160
P
Extract air
Exhaust
air
FLM
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 (CM3). If there is a level vessel (CM2)
this should be replaced.
P
Fläktkonvektor
Fan convectors
NIBE F1226Chapter 4 | Pipe connections16

Under floor heating systems
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.
UKV
P
UKV
17Chapter 4 | Pipe connectionsNIBE F1226

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,
F1226 should be equipped with a separate one.
■If a miniature circuit breaker is used this should have
at least motor characteristic “C”. See page 49 for fuse
size.
■Electrical wiring diagram for the heat pump, see page
57.
■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 F1226, 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.
Component parts of the product can be dam-
aged.
NOTE
Electrical installation and service must be carried
out under the supervision of a qualified electri-
cian. Cut the current with the circuit breaker
before carrying out any servicing. Electrical in-
stallation and wiring must be carried out in ac-
cordance with the stipulations in force.
NOTE
Check the connections, main voltage and phase
voltage before the machine is started, to prevent
damage to the heat pump electronics.
F1245
FD1
FD1-SF2
FA1
FB1
UB3
UB1
UB2
Miniature circuit-breaker
The heat pump operating circuit and some of its internal
components are internally fused by a miniature circuit
breaker (FA1).
Temperature limiter
The temperature limiter (FD1) cuts the power to the
electric additional heat if the temperature exceeds 89°C
and is reset manually.
Resetting
The temperature limiter (FD1) is accessible behind the
front cover. Reset the temperature limiter by pressing
the button (FD1-SF2) using a small screwdriver.
Motor cut-out
Motor protection breaker (FB1) cuts the power to the
compressor if the current is too high.
Resetting
The motor protection breaker (FB1) is accessible behind
the front cover. The breaker is reset by twisting the con-
trol knob to horizontal position.
Caution
Check the miniature circuit-breaker, temperat-
ure limiter and motor protection breaker. They
may have tripped during transportation.
NIBE F1226Chapter 5 | Electrical connections18
5 Electrical connections

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 without a tool.
Removing the cover, terminal block
LEK
1
2
1. Push the catch down.
2. Angle out the cover and remove it.
Removing the cover, immersion heater circuit board
LEK
1
2
A
B
1. Insert the screwdriver (A) and pry the catch carefully
downwards (B).
2. Angle out the cover and remove it.
Removing the cover, base board
Caution
To remove the cover for the base board, the
cover for the terminal block for soft inputs must
first be removed.
LEK
1
LEK
1
A
B
2
2
3
1. Disconnect the switches using a screwdriver.
2. Insert the screwdriver (A) and pry the catch carefully
downwards (B).
3. Angle out the cover and remove it.
19Chapter 5 | Electrical connectionsNIBE F1226

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 communic-
ation and/or sensor to external connections
cables must not be laid closer than 20 cm to
high voltage cable when cable routing.
Power connection
F1226 must be installed with a disconnection option on
the supply cable. Minimum cable area must be sized ac-
cording to the fuse rating used. Enclosed cable for incom-
ing 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
NOTE
F1226-12 contains scroll compressor, which
means that it is important that electrical connec-
tions are made with the correct phase sequence.
With the incorrect phase sequence, the com-
pressor does not start and an alarm is displayed.
If separate supply to the compressor and immersion
heater is required, see section "Switch for external
blocking of addition and/or compressor" on page 23.
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. 22
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 F1226 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
NIBE F1226Chapter 5 | Electrical connections20