Nibe F1155 Series User guide

Installer manual
LEK
NIBE F1155
UK 1x230V
Ground source heat pump
IHB EN 1748-4
331379

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 37.
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.

Table of Contents
41 Important information
4Safety information
82 Delivery and handling
8Transport
8Assembly
9Supplied components
9Removing the covers
103 The heat pump design
10General
11Distribution boxes
12Cooling section
144 Pipe connections
14General
15Dimensions and pipe connections
16Brine side
16Heating medium side
17Water heater
17Docking alternatives
215 Electrical connections
21General
23Connections
24Settings
26Optional connections
29Connecting accessories
316 Commissioning and adjusting
31Preparations
31Filling and venting
32Start guide
33Post adjustment and venting
34Setting the cooling/heating curve
377 Control - Introduction
37Display unit
38Menu system
418 Control - Menus
41Menu 1 - INDOOR CLIMATE
41Menu 2 - HOT WATER
41Menu 3 - INFO
42Menu 4 - HEAT PUMP
43Menu 5 - SERVICE
539 Service
53Maintenance
53Service actions
5910 Disturbances in comfort
59Info-menu
59Manage alarm
59Troubleshooting
6111 Accessories
6312 Technical data
63Dimensions and setting-out coordinates
64Technical specifications
67Energy labelling
71Item register
3Table of Contents |NIBE F1155

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 num-
ber 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 F1155Chapter 1 | Important information4
1 Important information

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.
Benchmark places responsibilities on both manufacturers
and installers. The purpose is to ensure that customers
are provided with the correct equipment for their needs,
that it is installed, commissioned and serviced in accord-
ance with the manufacturers instructions by competent
persons and that it meets the requirements of the appro-
priate 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 www.centralheat-
ing.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, serviced
every year and the Benchmark documents completed.
Where this condition is not met, any chargeable spare
parts or components issued within the applicable guar-
antee 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.
5Chapter 1 | Important informationNIBE F1155

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 16)
System flushed
System vented
Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pump setting
Electricity (page 21)
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
NIBE F1155Chapter 1 | Important information6

DateSignatureNotesDescription
✔
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 °.
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 56 for instructions about the separation.
Assembly
■Position F1155 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 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 connec-
tion equipment, i.e. level vessel, 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
LEK
Aluminium tape
1 x
LEK
Insulation tape
1 x
LEK
Level vessel
1 x
Filterball
6 kW
1 x G1
1 x G3/4
12 kW
1 x G1
1 x G1 1/4
Compression ring
couplings
6 kW
2 x (ø28 x G25)
3 x (ø22 x G20
12 kW
5 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
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.
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
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 UplinkW130
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.
NIBE F1155Chapter 3 | The heat pump design10
3 The heat pump design

Distribution boxes
UN
F1255
FD1
AA1
FA1
AA3
AA2AA23
FA1
FD1
AA23 AA2AA1 AA3
Electrical components
Immersion heater cardAA1
Base cardAA2
Input circuit boardAA3
Communication boardAA23
Miniature circuit-breakerFA1
Temperature limiter/Emergency mode thermostatFD1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
11Chapter 3 | The heat pump designNIBE F1155

Cooling section
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
BT14
CA1
XL21
RA1
BT15
BP1
BT17
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
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
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 us-
ing a private well, it may be necessary to sup-
plement 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
cannot damage component parts.
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
Usually, there should not be a problem in installing F1155
in areas with hard water as the maximum operating
temperature is 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 treat-
ments (supplied by e.g. Fernox and Sentinel) specifically
designed for heat pumps.
Symbol key
MeaningSymbol
Shut-off valve
Non-return valve
Mixing valve
Shunt / shuttle valve
Safety valve
Temperature sensor
Pressure gauge
Circulation pump
Particle filter
Filterball (ball valve with integrated particle fil-
ter)
Compressor
Expansion vessel
Level vessel
Heat exchanger
NIBE F1155Chapter 4 | Pipe connections14
4 Pipe connections

System diagram
F1155 consists of heat pump, immersion heater, circula-
tion 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 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 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
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/re-
turn ext. Ø
2822(mm)(XL9) Connection water heater ext. Ø
28(mm)(XL6)/(XL7) Brine in/out ext. Ø
* Can be angled for side connection.
15Chapter 4 | Pipe connectionsNIBE F1155

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
individually.
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.
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 treat-
ments (supplied by e.g. Fernox and Sentinel) specifically
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.
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 enclosed filterball 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
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 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.
■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.
NIBE F1155Chapter 4 | Pipe connections16

■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.
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 treat-
ments (supplied by e.g. Fernox and Sentinel) specifically
designed for heat pumps.
Water heater
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.
■Any docked hot water heater must be fitted with ne-
cessary 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.
Caution
Hot water production is activated in menu 5.2
or in the start guide.
Fixed condensing
If F1155 is to work towards the water heater with fixed
condensing you must connect an external flow sensor
(BT25) according to the description on page 24. In addi-
tion, you must perform 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 instruc-
tion for the accessory used. See page 61 for a list of ac-
cessories that can be used with F1155.
17Chapter 4 | Pipe connectionsNIBE 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 29
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 in the heat exchanger.
Ventilation recovery
The installation can be supplemented with the exhaust
air module FLM to enable 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.
Extract air
Ø 160
Exhaust air
Ø 160
NIBE F1155Chapter 4 | Pipe connections18

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.
■The brine system must be supplied with a pressure
expansion vessel (CM3). If there is a level vessel (CM2)
this should be replaced.
Underfloor heating system/preheating FTX
The external circulation pump is dimensioned for the
under floor heating system’s demand.
To ensure a heating supply during hot water production,
the heating system can be supplemented with a NIBE
UKV vessel, e.g. when there is a water coil in the FTX
ventilation.
19Chapter 4 | Pipe connectionsNIBE F1155

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.
Pool
By supplementing the installation with the accessory
POOL 40, pool heating is enabled in your climate unit.
During pool heating, the heating medium circulates
between the F1155 and the pool exchanger using the
heat pump’s internal circulation pumps.
Connecting hot water circulation
To reduce the risk of bacterial growth in systems with
hot water circulation, the temperature of the circulating
water should not fall below 50 °C. There should not be
any non-circulatory hot water pipes. Adjust the hot water
system so that the temperature does not fall below 50
°C at the ends of the system.
An additional expansion vessel may be requiered.
NIBE F1155Chapter 4 | Pipe connections20