Nibe F1155 Series User manual

IHB EN 2008-5
331379
INSTALLATION MANUAL
Ground source heat pump
NIBE F1155 UK 1x230V

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 36.
How to scroll through menus and make different settings is described on page 39.
Set the indoor climate
2X
INDOOR CLIMATE
HEAT PUMP INFO
HOT WATER
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
To temporarily increase the amount of hot water (if a hot water heater is installed to your F1155), 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
6Country specific information
7Inspection of the installation
82 Delivery and handling
8Transport
8Assembly
9Supplied components
9Removing the covers
103 The heat pump design
10General
11Distribution boxes
12Cooling section (EP14)
144 Pipe connections
14General
16Dimensions and pipe connections
16Brine side
17Heating medium side
17Cold and hot water
18Docking alternatives
205 Electrical connections
20General
22Connections
24Settings
25Optional connections
28Connecting accessories
306 Commissioning and adjusting
30Preparations
30Filling and venting
31Start-up and inspection
33Setting the heating curve
367 Control - Introduction
36Display unit
37Menu system
418 Control - Menus
41Menu 1 - INDOOR CLIMATE
41Menu 2 - HOT WATER
42Menu 3 - INFO
42Menu 4 - HEAT PUMP
43Menu 5 - SERVICE
559 Service
55Maintenance
55Service actions
6210 Disturbances in comfort
62Manage alarm
62Troubleshooting
6511 Accessories
6712 Technical data
67Dimensions and setting-out coordinates
68Electrical data
69Technical specifications
72Energy labelling
75Item register
83Contact information
3Table of ContentsNIBE F1155
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.
F1155 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.
IP21
Danger to person or machine.
!
Read the User Manual.
NIBE F1155Chapter 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 F1155

Country specific
information
UNITED KINGDOM
This installation is subject to building regulation approval,
notify the local Authority of intention to install.
Use only manufacturer’s recommended replacement
parts.
For more information see nibe.co.uk.
Benchmark places responsibilities on both manufactur-
ers and installers. The purpose is to ensure that custom-
ers are provided with the correct equipment for their
needs, that it is installed, commissioned and serviced
in accordance with the manufacturers instructions by
competent persons and that it meets the requirements
of the appropriate Building Regulations. The Benchmark
Checklist can be used to demonstrate compliance with
Building Regulations and should be provided to the
customer for future reference.
Installers are required to carry out the installation, com-
missioning and servicing work in accordance with the
Benchmark Code of practice which is available from the
Heating and Hotwater Industry Council who manage
and promote the Scheme. Visit centralheating.co.uk for
information.
Warranty and insurance information
Thank you for installing a new NIBE heat pump in your
home.
NIBE heat pumps are manufactured in Sweden to the
very highest standard so we are pleased to offer our
customers a comprehensive guarantee.
The product is guaranteed for 24 months for parts and
labour from the date of installation or 33 months from
the date of manufacture, whichever is the shorter.
The NIBE guarantee is based on the unit being installed
and commissioned by a NIBE accredited installer, ser-
viced every year and the Benchmark documents com-
pleted. Where this condition is not met, any chargeable
spare parts or components issued within the applicable
guarantee period still benefit from a 12 month warranty
from the date of issue by the manufacturer.
We recommend the installer completes and returns as
soon as possible, your guarantee registration card or
completes the guarantee form on the NIBE website
www.nibe.co.uk
Electrical Supply
The heat pump must be permanently connected to a
230V ac 50Hz supply.
All system components shall be of an approved type
and all wiring to current I.E.E wiring regulations.
External wiring must be correctly earthed, polarised and
in accordance with the relevant standards: Currently this
is BS 7671.
Domestic Hot Water
All domestic hot water circuits, connections and fittings
must be in accordance with the relevant standards and
water supply regulations. It should also be in accordance
with the relevant requirements of the Local Authority
and the Building Regulations relevant to the location of
installation.
BS 8558:2015 Services supplying water for domestic
use within buildings and their cartilages.
Water Supply (Water Fitting) Regulations 1999 or The
Water Bylaws 2000 (Scotland).
Heating System
The installation of the heat pump should follow best
practice as covered in the following:
BS 5449 Forced circulation hot water central heating
systems for domestic premises.
BS 15450 Heating systems in buildings – Design of heat
pump heating systems.
NIBE F1155Chapter 1 | Important information6

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 16)
System flushed
System vented
Antifreeze
Level/Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pump setting
Heating medium (page 17)
System flushed
System vented
Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pump setting
Electricity (page 20)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Safety breaker
Earth circuit-breaker
Setting of emergency mode thermostat
Miscellaneous
Warranty
Benchmark checklist
7Chapter 1 | Important informationNIBE F1155

Transport
F1155 should be transported and stored vertically in a
dry place. When being moved into a building, F1155
may be leant back 45 °.
Ensure that F1155 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, F1155 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 58 for instructions about the separation.
Assembly
• Place F1155 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 F1155, 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 F1155
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.
NIBE F1155Chapter 2 | Delivery and handling8
2 Delivery and handling

Supplied components
LEK
Safety valve
0.3 MPa (3 bar)
1 x
Room sensor
1 x
Outside sensor
1 x
Tubes for sensors
3 x
Temperature
sensor
3 x
O-rings
8 x
Compression ring
couplings
6 kW
2 x (ø28 x G25)
3 x (ø22 x G20
12 kW
5 x (ø28 x G25)
LEK
Aluminium tape
1 x
LEK
Insulation tape
1 x
Filterball
6 kW
1 x G1
1 x G3/4
12 kW
1 x G1
1 x G1 1/4
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
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.
9Chapter 2 | Delivery and handlingNIBE F1155

General
UN
PF1
QN10
BT2
EB1
UB1
QM34
QM31
XL1
XL6 XL7
XL2XL9
UB3
AA4
SF1
AA4-XJ4
AA4-XJ3
UB2
QM32
QM33
PF2
W130
EP14
PIPE CONNECTIONS
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Connection, hot water heaterXL9
HVAC COMPONENTS
T&P valveFL5
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
Immersion heaterEB1
SwitchSF1
Network cable for NIBE UplinkW130
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.
NIBE F1155Chapter 3 | The heat pump design10
3 The heat pump design

Distribution boxes
UN
F1255
FD1
AA1
FA1
AA3
AA2AA23
FC1
FQ10
AA23 AA2AA1 AA3
ELECTRICAL COMPONENTS
Immersion heater cardAA1
Base cardAA2
Input circuit boardAA3
Communication boardAA23
Miniature circuit-breakerFC1
Temperature limiter/Emergency mode thermostatFQ10
11Chapter 3 | The heat pump designNIBE F1155

Cooling section (EP14)
6 kW
LEK LEK
BT12
GP1
GP2
QM2 QM1
BT10
AA100
BT11
BT3
12 kW
LEK
BT12
GP1
GP2
QM2
QM1
BT10
AA100
BT11
BT3
6 kW
LEK LEK
EP2
BT14
QA40
BT17
CA1
RA1
BT15
BP1
EP1
GQ10
HS1
BP2
XL20
QN1
XL21
EB10
12 kW
LEK
EP2
QA40
BT17
CA1
XL21
RA1
BT15
BP1
BT14
EP1
GQ10
HS1
BP2
XL20
QN1
EB10
NIBE F1155Chapter 3 | The heat pump design12

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
CapacitorCA1
Compressor heaterEB10
InverterQA40
ChokeRA1
COOLING COMPONENTS
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHS1
Expansion valveQN1
13Chapter 3 | The heat pump designNIBE F1155

General
Pipe installation must be carried out in accordance with
current norms and directives. F1155 can operate with
a return temperature of up to 58 °C and an outgoing
temperature from the heat pump of 70 (65 °C with only
the compressor).
F1155 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.
NOTE
This installation is subject to building regulation
approval, notify the local Authority of intention
to install.
NOTE
Use only manufacturer’s recommended replace-
ment parts.
HARD WATER AREAS
There should not normally be any problem installing
F1155 in hard water areas, as the operating temperature
is 50-60°C.
CLEANING THE CLIMATE SYSTEM
When the water heater and the climate system have
been filled with water, F1155 must operate at maximum
normal temperature for at least one hour. Thereafter the
system must be drained of water and refilled.
Before installing the heat pump in an existing system,
it is important that the system is properly flushed
through.
Even if the heat pump is to be installed in a new system,
the heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed
from the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term
anti-corrosion protection.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
NIBE F1155Chapter 4 | Pipe connections14
4 Pipe connections

SYMBOL KEY
MeaningSymbol
Unit box
Shut-off valve
Non-return valve
Circulation pump
Expansion vessel
Filterball
Fan
Pressure gauge
Level vessel
Particle filter
Safety valve
Temperature sensor
Reversing valve/shunt
Manual reversing valve/shunt
Heat exchanger
Overflow valve
Bore hole
Ground collector
Under floor heating systems
Heat pump
Cooling system
Pool
Radiator system
Domestic hot water
SYSTEM DIAGRAM
F1155 consists of heat pump, immersion heater, circu-
lation pumps and control system. F1155 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
15Chapter 4 | Pipe connectionsNIBE F1155

Dimensions and pipe
connections
620
600
560
70
1475
725* 725*
25-50
25
55
130
460
535
405
440
620
600
560
70
1475
725* 725*
25-50
25
55
130
460
535
405
440
XL1 XL6 XL7XL9 XL2
PIPE DIMENSIONS
12
kW
6
kW
Connection
2822(mm)(XL1)/(XL2) Heating medium
flow/return ext. Ø
2822(mm)(XL9) Connection water heater ext.
Ø
28(mm)(XL6)/(XL7) Brine in/out ext. Ø
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.
Anti freeze must be mixed according to manufacturer's
instructions to ensure frost protection and should be
checked using a refractometer.
NOTE
Ensure that cleaning agent has been removed
from the entire system before the anti-freeze
is added.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
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 F1155Chapter 4 | Pipe connections16

CONNECTING THE BRINE SIDE
• Insulate all indoor brine pipes against condensation.
• The system must be fitted with an expansion vessel
(CM3), pressure gauge (BP6) and the enclosed safety
valve (FL3).
• Install a shut off valve for outgoing brine as close to
the heat pump as possible.
• Fit the enclosed filterball 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
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 F1155
and for example radiators, underfloor heating/cooling,
fan convectors etc.
•Install all necessary safety devices, shut-off valves (as
close to the heat pump as possible) and the enclosed
filterball.
• 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.
Before installing the heat pump in an existing system,
it is important that the system is properly flushed
through.
Even if the heat pump is to be installed in a new system,
the heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed
from the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term
anti-corrosion protection.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
P
XL1
XL2
Cold and hot water
CONNECTING THE HOT WATER HEATER
NOTE
If F1155 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, expansion relief
valve, pressure reduction valve, expansion vessel and
tundish as illustrated.
• The expansion relief valve must have a maximum 0.6
MPa (6.0 bar) opening pressure and be installed on
the incoming domestic water line as shown.
• The expansion vessel (CM4) accomodates expansion
that results from heating the water inside the unit.
The expansion vessel must be connected between
the expansion releif valve (FL1) and the water heater.
The location of the expansion vessel should allow ac-
cess to recharge the pressure as and when nec-
cessary.
•Stop temperature for hot water must be at least 60°C.
• A mixing valve must be installed when 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.
17Chapter 4 | Pipe connectionsNIBE F1155

FIXED CONDENSING
If F1155 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
23. In addition, you must make the following menu
settings.
Menu setting (local vari-
ations may be required)
Menu
Desired temperature in the
tank.
1.9.3.1 - min. flow line
temp. heating
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
F1155 can be connected in several different ways, some
of which are shown below.
Further option information is available at www.nibe.co.uk
and in the respective assembly instruction for the ac-
cessory used. See page 65 for a list of accessories that
can be used with F1155.
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. See page 28
for more information about connecting a ground water
pump.
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
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.
P
FREE COOLING
The accessory PCS 44 allows the connection of passive
cooling, for example with fan coils. The cooling system
is connected to the heat pump brine circuit, whereby
cooling is supplied from the collector via a circulation
pump and shunt valve.
• 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.
-EP25-AA25
-EP25-QN18-EP25-BT64
-EP25-GP13
-EP25-BT65 -EP25-RM1
-EP25
NIBE F1155Chapter 4 | Pipe connections18

TWO OR MORE CLIMATE SYSTEMS
In buildings with several climate systems that require
different supply temperatures, the accessory
ECS 40/ECS 41 can be connected. A shunt valve then
lowers the temperature to the underfloor heating sys-
tem, for example.
-EP21-RM1
-EP21-GP10-EP21-BT2
-EP21-AA25
-EP21-BT3
-EP21-QN25
-EP21
POOL
With the POOL 40 accessory, you can heat the pool
with your heat pump.
During pool heating, the heating medium circulates
between the F1155 and the pool exchanger using the
heat pump’s internal circulation pump.
-CL11-HQ4-CL11-BT51-CL11-GP9
-CL11-EP5-CL11-QN19
-CL11-AA25
-CL11
19Chapter 4 | Pipe connectionsNIBE F1155

General
All electrical equipment, except the outdoor sensors,
room sensors and the current sensors are ready connec-
ted at the factory.
• Disconnect the heat pump before insulation testing
the house wiring.
• If the building is equipped with an earth-fault breaker,
F1155 should be equipped with a separate one.
• If a miniature circuit breaker is used this should have
at least motor characteristic “C”. See page 69 for fuse
size.
• Electrical wiring diagrams for the heat pump, see
separate installation handbook for electrical wiring
diagrams.
•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 F1155, 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.
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.
TEMPERATURE LIMITER, COMPRESSOR
The temperature limiter (FQ11) cuts the power supply
to the soft-start, if the temperature rises above 88°C,
and it is reset manually.
Resetting
The temperature limiter (FQ11) can be accessed behind
the front cover. Reset the temperature limiter by
pressing the button (FQ11-SF2) using a small screw-
driver.
NIBE F1155Chapter 5 | Electrical connections20
5 Electrical connections