Nibe S1155 User guide

IHB EN 2001-1
531210
INSTALLER MANUAL
Ground source heat pump
NIBE S1155 1x230V

Quick guide
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If the menu has
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Setting the indoor temperature.
Bottom floor
Temperature
HEAT
13.45 3 October
Smartguide
Yes please, take me to Smartguide.
Hi!
Your system is working properly. Do you want help making
changes?
13.45 3 October
You can set the temperature for your installation's climate
system here.
Smartguide helps you both to view information about the
current status and to make the most common settings
easily. The information that you see depends on the
product you have and the accessories that are connected
to the product.
Product overview
PRODUCT OVERVIEW
Update
Product name
Serial number
Software
Service
13.45 3 October
Company AB
Phone number
VVM S320
06919618030101
0.5.1
Increasing hot water temperature
HOT WATER
More hot water
13.45 3 October
Here, you can find information about product name, the
product's serial number, the version of the software and
service. When there is new software to download, you
can do it here (provided that S1155 is connected to my-
Uplink).
Here, you can start or stop a temporary increase in the
hot water temperature.
This function page is only visible in installations with a
water heater.

41 Important information
4Safety information
4Symbols
4Marking
4Serial number
5Country specific information
6Inspection of the installation
72 Delivery and handling
7Transport
7Assembly
8Supplied components
8Handling panels
113 The heat pump design
11General
12Distribution boxes
12Cooling sections
144 Pipe connections
14General
16Dimensions and pipe connections
16Brine side
17Heating medium side
17Cold and hot water
18Docking alternatives
205 Electrical connections
20General
22Connections
26Settings
286 Commissioning and adjusting
28Preparations
28Filling and venting
29Start-up and inspection
31Setting the heating curve
347 myUplink
34Specification
34Connection
34Range of services
34Mobile apps for myUplink
358 Control - Introduction
35Display unit
36Navigation
36Menu types
399 Control - Menus
39Menu 1 – Indoor climate
43Menu 2 – Hot water
44Menu 3 - Info
45Menu 4 - My system
48Menu 5 - Connection
49Menu 6 - Scheduling
50Menu 7 - Service
5810 Service
58Maintenance
58Service actions
6511 Disturbances in comfort
65Info-menu
65Manage alarm
6712 Accessories
6913 Technical data
69Dimensions and setting-out coordinates
70Electrical data
70Technical specifications
74Energy labelling
78Item register
83Contact information
3Table of ContentsNIBE S1155
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.
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
Read the User Manual.
Read the Installer Manual.
Serial number
The serial number can be found at the bottom right on
S1155, in the display on the home screen "Product
overview" and on the type plate (PZ1).
Caution
You need the product's ((14 digit) serial number
for servicing and support.
NIBE S1155Chapter 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.
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.
5Chapter 1 | Important informationNIBE S1155

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 side
System flushed
System vented
Antifreeze
Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pump setting
Heating medium side
System flushed
System vented
Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pump setting
Electricity
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Safety breaker
Earth circuit-breaker
Set emergency mode in menu 7.1.8.2
Miscellaneous
Warranty
Benchmark checklist
NIBE S1155Chapter 1 | Important information6

Transport
S1155 should be transported and stored vertically in a
dry place. When being moved into a building, S1155
may be leant back 45 °.
Ensure that S1155 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, S1155 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 61 for instructions about the separation.
Assembly
• Place S1155 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 S1155, 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 S1155
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, i.e. expansion vessel, valves and electrical equipment.
7Chapter 2 | Delivery and handlingNIBE S1155
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.
Handling panels
OPEN FRONT HATCH
Press the hatch's top left corner to open it.
REMOVE THE FRONT
1. Remove the screw in the hole next to the on/off
button (SF1).
2. Pull the panel's top edge towards you and lift diag-
onally upwards to remove it from the frame.
UN
NIBE S1155Chapter 2 | Delivery and handling8

ASSEMBLE THE FRONT
1. Hook one bottom corner of the front onto the frame.
2. Hook the other corner in place.
3. Check the display is straight. Adjust if necessary.
4. Press the top of the front section against the frame
and screw it into place.
REMOVE SIDE PANEL
The side panels can be removed to facilitate the install-
ation.
1. Remove the screws from the upper and lower
edges.
UN
9Chapter 2 | Delivery and handlingNIBE S1155

2. Twist the panel slightly outwards.
UN
3. Move the panel outwards and backwards.
UN
Assembly takes place in the reverse order.
NIBE S1155Chapter 2 | Delivery and handling10

General
UN
QN10
BT2
EB1
PZ1
QM34
QM31
QM32
QM33
PZ2
UB3
AA4
SF1
AA4-XF3
XL1
XL6
XL9
XL7
XL2
BF1
UB2
FC1
UB1
XF8
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.
Flow meterBF1
Temperature sensors, heating medium flowBT2
ELECTRICAL COMPONENTS
Display unitAA4
AA4-XF3 USB port
Immersion heaterEB1
Miniature circuit breakerFC1
On/off buttonSF1
Network connection for myUplinkXF8
MISCELLANEOUS
Rating platePZ1
Identification plate, cooling modulePZ2
Cable glandUB1
Cable glandUB2
Cable gland, rear side, sensorUB3
Designations according to standard EN 81346-2.
11Chapter 3 | The heat pump designNIBE S1155
3 The heat pump design

Distribution boxes
UN
-X29
-X28
0-5V 1
+5V 2
AUX1 3
AUX2 4
AUX3 5
AUX4 6
AUX5 7
AUX6 8
AUX7 9
AUX8 10
BT6 11
BT25 12
1
1
2
3
2
3
4
5
6
7
8
9
10
11
12
GND
+12V
B
A
OT+
OT−
0-5V
PWM0
PWM1
CPU
EXT COM
INT COM
ERROR
POWER
+5V
GND
BE1
BE2
BE3
K10
-X27
NO
O
NC
AUX-RELAY
BT50 13
BT1 14
-X30
FQ10-S2FQ10AA2
ELECTRICAL COMPONENTS
Base cardAA2
Temperature limiterFQ10
FQ10-S2 Reset button for temperature limiter
Cooling sections
6 kW
UN
BT11
BT12
BT10
BT3
GP2
QM2 QM1
GP1
AA3
RF2
12 kW
UN
BT11
BT12
AA3
BT10
BT3
GP2
QM2
QM1
GP1
RF2
6 kW
EP2
CA1
RA1
BP1
BT14
QA40
BT15
GQ10
BP2
QN1
EB10
EP1
HS1
XL21
XL20
BT17
12 kW
UN
EP2
CA1
RA1
XL21
BP1
QA40
BT17
BT15
EP1
HS1
XL20
EB10
BT14
GQ10
QN1
BP2
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
NIBE S1155Chapter 3 | The heat pump design12

ELECTRICAL COMPONENTS
Input circuit boardAA3
CapacitorCA1
Compressor heaterEB10
InverterQA40
ChokeRA1
EMC-filterRF2
COOLING COMPONENTS
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHS1
Expansion valveQN1
13Chapter 3 | The heat pump designNIBE S1155

General
Pipe installation must be carried out in accordance with
current norms and directives. S1155 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).
S1155 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
S1155 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, S1155 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 S1155Chapter 4 | Pipe connections14
4 Pipe connections

SYMBOL KEY
MeaningSymbol
Unit box
Shut-off valve
Non-return valve
Mixing valve
Circulation pump
Expansion vessel
Filterball
Fan
Shut off valve
Pressure gauge
Particle filter
Safety valve
Temperature sensor
Trim valve
Pressure reduction valve
Tundish
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
Hot water circulation
SYSTEM DIAGRAM
S1155 consists of heat pump, immersion heater, circu-
lation pumps and control system. S1155 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.
XL
1 6 9 7 2
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Connection, hot water heaterXL9
15Chapter 4 | Pipe connectionsNIBE S1155

Dimensions and pipe
connections
600
55
135
390
465
540
622
560
725* 725*
440
70
1500
20-50
25
600
55
135
390
465
540
622
25
560
725* 725*
440
70
1500
20-50
XL1 XL6 XL7XL9 XL2
PIPE DIMENSIONS
12
kW
6
kW
Connection
2822(mm)(XL1)/(XL2) Heating medium supply/re-
turn 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 S1155Chapter 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 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 S1155
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 S1155 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 7.1.1.
17Chapter 4 | Pipe connectionsNIBE S1155

XL9
XL2
FIXED CONDENSING
If S1155 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.
1.30.4 - min. flow line temp.
heating
Desired temperature in the
tank.
1.30.6 - max flow line tem-
perature
intermittent7.1.2.1 - op. mod heat med
pump
manual4.1 - op. mode
Docking alternatives
S1155 can be connected in several different ways, some
of which are shown below.
Further option information is available at nibe.eu/ODM
and in the respective assembly instructions for the ac-
cessories used. See page 67 for a list of the accessories
that can be used with S1155.
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 26
for more information about connecting a ground water
pump.
If this docking alternative is used, "min. brine out" in
menu 7.1.2.8 "br pmp al set." must be changed to a
suitable 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 S45 to provide ventilation recov-
ery.
• Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
P
NIBE S1155Chapter 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.
-EP25-AA25
-EP25-QN18-EP25-BT64
-EP25-GP13
-EP25-BT65 -EP25-RM1
-EP25
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 S1155 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
CONNECTING HOT WATER CIRCULATION
Hot water circulation
A circulation pump can be controlled by S1155 to circu-
late the hot water. The circulating water must have a
temperature that prevents bacterial growth and scalding,
and national standards must be satisfied.
-QZ1-FQ3
-QZ1-GP11
-QZ1-RM1
-QZ1-RN1
-QZ1
19Chapter 4 | Pipe connectionsNIBE S1155

General
All electrical equipment, except the outdoor sensors,
room sensors and the current sensors are ready connec-
ted at the factory.
• Electrical installation and wiring must be carried out
in accordance with the stipulations in force.
• Disconnect S1155 before insulation testing the house
wiring.
• If the building is equipped with an earth-fault breaker,
S1155 should be equipped with a separate one.
• S1155 must be installed via an isolator switch. The
cable area has to be dimensioned based on the fuse
rating used.
• If a miniature circuit breaker is used, this must have
motor characteristic "C" as a minimum. See section
"Technical specifications" for fuse size.
• To prevent interference, sensor cables to external
connections must not be laid close to high voltage
cables.
• The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX, LiYY or equivalent.
• Electrical wiring diagram for the heat pump, see sep-
arate Installer Manual.
• When cable routing in S1155, the cable grommets
(UB1 and UB2) must be used.
UB1
UB2
FC1
NOTE
Electrical installation and any servicing must
be carried out under the supervision of a quali-
fied electrician. Disconnect the current using
the circuit breaker before carrying out any ser-
vicing.
NOTE
If the supply cable is damaged, only NIBE, its
service representative or similar authorised
person may replace it to prevent any danger
and damage.
NOTE
Check the connections, main voltage and phase
voltage before the machine is started, to pre-
vent damage to the heat pump electronics.
NOTE
Do not start the system before filling up with
water. Components in the system could be
damaged.
MINIATURE CIRCUIT-BREAKER
The operating circuit in S1155 and some of its internal
components are fused internally by a miniature circuit
breaker (FC1).
NIBE S1155Chapter 5 | Electrical connections20
5 Electrical connections