Nibe F1355 Series User guide

IHB EN 1833-4
331996
INSTALLER MANUAL
Ground source heat pump
NIBE F1355

41 Important information
4Safety information
4Symbols
4Marking
5Safety precautions
6Serial number
6Recovery
6Environmental information
7Inspection of the installation
82 Delivery and handling
8Transport
8Assembly
9Supplied components
10Removing the covers
113 The heat pump design
11General
12Distribution boxes
13Cooling section
144 Pipe connections
14General
15Dimensions and pipe connections
16Brine side
18Heating medium side
18Water heater
19Docking alternatives
215 Electrical connections
21General
22Connections
25Optional connections
32Connecting accessories
336 Commissioning and adjusting
33Preparations
33Filling and venting
34Start guide
35Post adjustment and venting
377 Accessories
408 Technical data
40Dimensions and setting-out coordinates
41Technical specifications
43Energy labelling
45Electrical wiring diagram, 3x400V 28 kW
54Item register
59Contact information
3Table of ContentsNIBE F1355
Table of Contents

Safety information
This manual describes installation and service proced-
ures for implementation by specialists.
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. The product is inten-
ded for use by experts or trained users in
shops, hotels, light industry, farming and
similar environments.
Children must be instructed/supervised to
ensure that they do not play with the appli-
ance.
Do not allow children to clean or maintain
the appliance unsupervised.
This is an original manual. It may not be
translated without the approval of NIBE.
Rights to make any design or technical
modifications are reserved.
©NIBE 2018.
Do not start F1355 if there is a risk that the
water in the system has frozen.
F1355 must be installed with a disconnection
option on the supply cable. Minimum cable
area must be sized according to the fuse
rating used. Electrical installation and wiring
must be carried out in accordance with applic-
able regulations.
Symbols
WARNING!
This symbol indicates serious danger to person
or machine.
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 equip-
ment.
IP21
Danger to person or machine.
!
Read the operating manual.
NIBE F1355Chapter 1 | Important information4
1 Important information

Safety precautions
CAUTION
Install the system in full accordance with this installation manual.
Incorrect installation can cause bursts, personal injury, water leaks,
refrigerant leaks, electric shocks and fire.
Pay attention to the measurement values before working on the
cooling system, especially when servicing in small rooms, so that
the limit for the refrigerant’s concentration is not exceeded.
Consult an expert to interpret the measurement values. If the refriger-
ant concentration exceeds the limit, there may be a shortage of oxygen
in the event of any leak, which can cause serious injury.
Use original accessories and the stated components for the in-
stallation.
If parts other than those stated by us are used, water leaks, electric
shocks, fire and personal injury may occur as the unit may not work
properly.
Ventilate the working area well – refrigerant leakage may occur
during service work.
If the refrigerant comes into contact with naked flames, poisonous
gas is created.
Install the unit in a location with good support.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury. Installation without sufficient
support can also cause vibrations and noise.
Ensure that the unit is stable when installed, so that it can with-
stand earthquakes and strong winds.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury.
The electrical installation must be carried out by a qualified
electrician and the system must be connected as a separate cir-
cuit.
Power supply with insufficient capacity and incorrect function can
cause electric shocks and fire.
Use the stated cables for the electrical connection, tighten the
cables securely in the terminal blocks and relieve the wiring cor-
rectly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause abnormal heat pro-
duction or fire.
Check, after completed installation or service, that no refrigerant
leaks from the system in gas form.
If refrigerant gas leaks into the house and comes into contact with an
aerotemp, an oven or other hot surface, poisonous gases are produced.
Use types of pipe and tools stated for this type of refrigerant.
Using existing parts for other refrigerants can cause breakdowns and
serious accidents due to process circuit bursts.
Switch off the compressor before opening/breaching the refriger-
ant circuit.
If the refrigerant circuit is breached /opened whilst the compressor
is running, air can enter the process circuit. This can cause unusually
high pressure in the process circuit, which can cause bursts and per-
sonal injury.
Switch off the power supply in the event of a service or inspec-
tion.
If the power supply is not shut off, there is a risk of electric shocks
and damage due to the rotating fan.
Do not run the unit with removed panels or protection.
Touching rotating equipment, hot surfaces or high voltage parts can
cause personal injury due to entrapment, burns or electric shocks.
Cut the power before starting electrical work.
Failure to cut the power can cause electric shocks, damage and incor-
rect function of the equipment.
CARE
Carry out the electrical installation with care.
Do not connect the ground lead to the gas line, water line, lightning
conductor or telephone line's ground lead. Incorrect grounding can
cause unit faults such as electric shocks due to short-circuiting.
Use main switch with sufficient breaking capacity.
If the switch does not have sufficient breaking capacity, malfunctions
and fire can occur.
Always use a fuse with the correct rating in the locations where
fuses are to be used.
Connecting the unit with copper wire or other metal thread can cause
unit breakdown and fire.
Cables must be routed so that they are not damaged by metal
edges or trapped by panels.
Incorrect installation can cause electric shocks, heat generation and
fire.
Do not install the unit in close proximity to locations where
leakage of combustible gases can occur.
If leaking gases collect around the unit, fire may occur.
Do not install the unit where corrosive gas (for example nitrous
fumes) or combustible gas or steam (for example thinner and
petroleum gases) can build up or collect, or where volatile com-
bustible substances are handled.
Corrosive gas can cause corrosion to the heat exchanger, breaks in
plastic parts etc. and combustible gas or steam can cause fire.
Do not use the unit for specialist purposes such as for storing
food, cooling precision instruments, freeze-conservation of anim-
als, plants or art.
This can damage the items.
Do not install and use the system close to equipment that gener-
ates electromagnetic fields or high frequency harmonics.
Equipment such as inverters, standby sets, medical high frequency
equipment and telecommunications equipment can affect the unit
and cause malfunctions and breakdowns. The unit can also affect
medical equipment and telecommunications equipment, so that it
functions incorrectly or not at all.
Take care when carrying the unit by hand.
If the unit weights more than 20 kg, it must be carried by two people.
Use gloves to minimize the risk of cuts.
Dispose of any packaging material correctly.
Any remaining packaging material can cause personal injury as it may
contain nails and wood.
Do not touch any buttons with wet hands.
This can cause electric shocks.
Do not touch any refrigerant pipes with your hands when the
system is in operation.
During operation the pipes become extremely hot or extremely cold,
depending on the method of operation. This can cause burn injuries
or frost injuries.
Do not shut off the power supply immediately after operation
has start.
Wait at least 5 minutes, otherwise there is a risk of water leakage or
breakdown.
Do not control the system with the main switch.
This can cause fire or water leakage. In addition, the fan can start un-
expectedly, which can cause personal injury.
ESPECIALLY FOR UNITS INTENDED FOR
R407C
- Do not use other refrigerants that those intended for the unit.
- Do not use charging bottles. These types of bottles change the
composition of the refrigerant, which makes the performance of the
system worse.
- When filling refrigerant, the refrigerant must always leave the bottle
in liquid form.
5Chapter 1 | Important informationNIBE F1355

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 le-
gislation.
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 F1355Chapter 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 Operating
Manual.
DateSignatureNotesDescription
✔
Brine (page 16)
Non-return valves
System flushed
System vented
Antifreeze
Level/Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pumps set
Heating medium (page 18)
Non-return valves
System flushed
System vented
Expansion vessel
Filterball (particle filter)
Safety valve
Shut off valves
Circulation pumps set
Electricity (page 21)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor
Safety breaker
Earth circuit-breaker
Relay output for emergency mode
7Chapter 1 | Important informationNIBE F1355

Transport
F1355 should be transported and stored vertically in a
dry place. While being moved into a building, the heat
pump may be tilted back 45 °.
NOTE
The heat pump is top heavy.
If the cooling modules are pulled out and transported
upright, F1355 can be transported on its back.
NOTE
Ensure that the heat pump cannot fall over
during transport.
TIP
The side panels can be removed for easier in-
stallation in the building.
R
0
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater
51°C
+2
0
-2
1
R
0
HMflow
49(50)°C
Hotwater
51°C
R
0
R
0
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater
51°C
+2
0
-2
1
R
0
HMflow
49(50)°C
Hotwater
51°C
R
0
LIFT FROM THE STREET TO THE SET UP
LOCATION
If the base allows, the simplest thing is to use a pallet
truck to move the F1355 to the set up location.
NOTE
The centre of gravity is offset to one side (see
print on the packaging).
F1355 must be lifted on the heaviest side and can be
moved on a sack truck. Two people are required to lift
F1355.
LIFT FROM THE PALLET TO FINAL
POSITIONING
Before lifting, remove the packaging and the load anchor
to the pallet as well as front and side panels.
Before lifting, the heat pump must be separated by
pulling the cooling modules out from the cabinet. See
the service chapter in the operating manual for instruc-
tions about the separation.
Carry the heat pump by the upper cooling module's slide
rails, use gloves.
NOTE
The heat pump must not be moved when only
the lower cooling module has been pulled out.
If the heat pump is not secured in position the
upper cooling module must always be removed
before the lower one can be pulled out.
SCRAPPING
For scrapping, remove the product in reverse order.
Assembly
• Position F1355 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 F1355, 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.
NIBE F1355Chapter 2 | Delivery and handling8
2 Delivery and handling

• 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 F1355
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. level vessel, valves and electrical equipment.
Supplied components
Temperature
sensor
5 x
LEK
Insulation tape
1 x
Outdoor temperat-
ure sensor
1 x
LEK
LEK
LEK
Current sensor
O-rings
16 x
LEK
Safety valve
0.3 MPa (3 bar)
1 x
Cable tie
8 x
LEK
Pipe insulation
8 pcs
Tubes for sensors
4 x
LEK
Aluminium tape
1 x
Filterball
4 x G1 1/4 (intern-
al thread)
LEK
LEK
Non-return valves
4 x G2, internal
thread
Heat conducting
paste
3 x
LOCATION
The enclosed kit is placed in the packaging next to the
heat pump.
9Chapter 2 | Delivery and handlingNIBE F1355

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 PANELS
LEK
The side covers can be removed to facilitate the install-
ation.
1. Remove the screws from the upper and lower
edges.
2. Twist the cover slightly outward.
3. Move the hatch outwards and backwards.
4. Assembly takes place in the reverse order.
NIBE F1355Chapter 2 | Delivery and handling10

General
L1
-X3 -X4
123
-AA101 -AA101
NL2 L3 1 2 3456789
-X5 1 2 3456789
-X6
-X7 -X8 -X9
-FC1
-AA101 -AA101
-AA101 -AA101 -AA101
1 2 341 2 31 2 31 2 345
-X10
A B A B
-AA3-X7
K1
-AA101
K2 K3
C C NO NC
K4 CNO NC
QN10 GP16
LNL L L N N N LNLNPE
PE
6789 10 11 12 13 14 15 16 17 18 19 20 2122
12V
A B 13 14
-BE1
-GP16
-BE2
-BE3
AUX 4
AUX 5
1 2 3456789 10 11 12 13 14 15
-AA3
-X6
0-10V -EP14 -EP15
-BF1
16 17 18 2
-AA3
-X22 -AA3
-AA3
-X20 -X21 1312 3
-X23
-BT1
-BT50
-BT25
-BT6
AUX 1
AUX 2
AUX 3
-BT7
-BT71
2.0
AA101-X4 FC1 AA101-X6 AA101-X8 AA101-X10 AA3-X6 AA3-X20 AA3-X22
AA101-XJ2 AA101-X3 AA101-X5 AA101-X7 AA101-X9 AA3-X21 AA3-X23
UN
UN
XJ3
XJ10XJ4
XJ5
XJ1
EP14
UB2 UB3
UB3
PF1
PF3
EP15
EP14-PF2
AA4
SF1
AA4-XJ4
AA4-XJ3
EP15-PF2
UB2
UB1
EP15-XL6
EP15-XL7 EP15-XL1
EP15-XL2
EP14-XL6
EP14-XL7 EP14-XL1
EP14-XL2
XJ7 XJ11
AA26
XJ9
AA2
XJ10
AA27
AA3
AA101
XJ8
XJ6
AA101-X2
AA101-X1
FC1
RF3 RA2
AA23
RA3
UN
XJ7 XJ11 AA26
XJ9
AA2
XJ10
AA27
AA3
AA101
XJ8
XJ6
AA101-X2
AA101-X1
FC1
RF3 RA2
AA23
UN
XJ7 XJ11
AA26
XJ9
AA2
XJ10
AA27
AA3
AA101
XJ8
XJ6
AA101-X2
AA101-X1
FC1
RF3 RA2
AA23
11Chapter 3 | The heat pump designNIBE F1355
3 The heat pump design

PIPE CONNECTIONS
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
HVAC COMPONENTS
Cooling moduleEP14
Cooling moduleEP15
SENSORS ETC.
Outdoor temperature sensor*BT1
* Not illustrated
ELECTRICAL COMPONENTS
Base cardAA2
Input circuit boardAA3
Terminal block, sensorAA3-X6
Terminal block -EP14 -BP8AA3-X20
Terminal block -EP15 -BP8AA3-X21
Terminal block, flow meter -EP14 -BF1AA3-X22
Terminal block, flow meter -EP15 -BF1AA3-X23
Display unitAA4
USB outlet (no function)AA4-XJ3
Service outlet (No function)AA4-XJ4
Communication boardAA23
Base card 2AA26
Relay board for baseAA27
Interface boardAA101
Terminal block, incoming electrical supplyAA101-X1
Terminal block, supply -EP14AA101-X2
Terminal block, operating voltage out -X4AA101-X3
Terminal block, operating voltage in (tariff
option)
AA101-X4
Terminal block, supply, external accessories.AA101-X5
Terminal block, -QN10 and -GP16AA101-X6
Emergency mode relayAA101-X8
Alarm relay, AUX relayAA101-X9
Communication, PWM, power supplyAA101-X10
Miniature circuit-breakerFC1
ChokeRA2, RA3
EMC-filterRF3
Switch on display -AA4SF1
Connector, electrical supply to compressor,
cooling module -EP14
XJ1
Connector, electrical supply to compressor,
cooling module -EP15
AA101-XJ2
Compressor heater -EP14XJ3
Connector, brine pump, cooling moduleXJ4
Connector, heating medium pump, cooling
module
XJ5
Compressor heater-EP15XJ6
Connector, brine pump, cooling module -EP15XJ7
Connector, heating medium pump, cooling
module -EP15
XJ8
Communication motor module -EP15XJ9
Communication motor module -EP14XJ10
Pumps, compressor heater -EP14XJ11
Communication motor moduleXJ13
MISCELLANEOUS
Rating platePF1
Type plate, cooling sectionPF2
Cable gland, incoming electricityUB1
Cable gland, powerUB2
Cable gland, signalUB3
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
Distribution boxes
LEK
LEK
LEK
FC1
AA10
ELECTRICAL COMPONENTS
Soft-start cardAA10
Miniature circuit-breakerFC1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE F1355Chapter 3 | The heat pump design12

Cooling section
F1355 28 KW, 3 X 400 V
Cooling module EP14
UN
BT11
RF2
BT3
GP1
QM1 QM2
GP2
AA100BT12
BT10
BP8
UN
XL20
EP2
GQ10BT14
BP2
BT17
QN1
HS1
BP1
BT29
EP1
EB10
QA40
BT15
XL21
BP8
Cooling module EP15
LEK
BT12
X401
GP2
GP1
BT3
QM1
QM2
BT11
BT10
AA100
LEK
EP2
BT14
BP8
BP2
BT15
BP1
EB10
EP1
GQ10
BT17
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
Sensor, low pressureBP8
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
Temperature sensor, compressorBT29
ELECTRICAL COMPONENTS
Joint cardAA100
Compressor heaterEB10
InverterQA40
EMC-filterRF2
Joint connector, compressor and motor moduleX401
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 F1355

General
Pipe installation must be carried out in accordance with
current standards and directives. F1355 can operate
with a return temperature of up to 58 °C and an outgoing
temperature of 65 °C.
F1355 is not equipped with internal shut off valves;
these must be installed to facilitate any future servicing.
NOTE
The pipe installations must be flushed before
F1355 is connected, so that any contaminants
do not damage the components parts.
NOTE
Do not solder directly on the pipes in F1355,
because of internal sensors.
Compression ring coupling alternatively pres-
sure connection should be used.
NOTE
The heating system's pipes must be earthed
to prevent a potential difference between them
and the building's protective earth.
SYMBOL KEY
MeaningSymbol
Venting valve
Shut-off valve
Non-return valve
Safety valve
Temperature sensor
Expansion vessel
Pressure gauge
P
Circulation pump
Filterball (ball valve with integrated particle filter)
Compressor
Heat exchanger
NIBE F1355Chapter 4 | Pipe connections14
4 Pipe connections

SYSTEM DIAGRAM
F1355 consists of two heat pump modules, circulation
pumps and control system with possibility of additional
heat. F1355 is connected to the brine and heating medi-
um 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 compressors can provide it is possible is to
connect an external immersion heater.
28kW
EP15-XL1
EP15-XL2
EP15-XL6
EP15-XL7
EP14-XL1
EP14-XL2
EP14-XL6
EP14-XL7
EP15
EP14
Cooling moduleEP14
Cooling moduleEP15
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, brine inXL6
Connection, brine outXL7
Dimensions and pipe
connections
1775
600
560 440
735
1555
1715
80 145 145 145
450620
820
85
25-50
1775
600
560 440
735
1555
1715
80 145 145 145
524620
820
85
25-50
15Chapter 4 | Pipe connectionsNIBE F1355

EP15-XL6
EP15-XL7
EP14-XL6
EP14-XL7
EP15-XL1
EP15-XL2
EP14-XL1
EP14-XL2
PIPE DIMENSIONS
Connection
internal thread G1 1/2
external thread G2
(XL1) Heating medium supply
internal thread G1 1/2
external thread G2
(XL2) Heating medium return
internal thread G1 1/2
external thread G2
(XL6) Brine in
internal thread G1 1/2
external thread G2
(XL7) Brine out
Brine side
COLLECTOR
Rock heat, recommen-
ded active drilling depth
(m)
Surface soil heat, re-
commended collector
length (m)
Type
3x150-5x2003x450-4x45028 kW
Applies to PEM hose 40x2.4 PN 6.3.
These are rough example values. At installation the
correct calculations must be made according to local
conditions.
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
500 m.
The collectors must always be connected in parallel with
the possibility of adjusting the flow for 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 may fall
below 0 °C, it must be protected against freezing down
to -15 °C. When making the volume calculation, 1 litre
of ready mixed brine per meter of collector hose (applies
when using PEM-hose 40x2.4 PN 6.3) is used as a guide
value.
Caution
Because the temperature of the brine system
varies depending on the heat source, the 5.1.7
“br pmp al set.” menu must be set to a suit-
able value.
NIBE F1355Chapter 4 | Pipe connections16

CONNECTING THE BRINE SIDE
•The pipe connections are on the rear of the heat pump.
• Insulate all indoor brine pipes against condensation.
NOTE
Condensation may drip from the expansion
vessel. Position the vessel so that this does
not harm other equipment.
Caution
When necessary you should install venting
valves in the brine system.
•Mark the brine system with the antifreeze that is used.
• Install the supplied safety valve at the expansion ves-
sel as illustrated in the outline diagram. The entire
length of the overflow water pipe from the safety
valves 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 so that the flow to individual cooling modules
can be shut off. Extra safety valves between the heat
pump and filterballs (according the outline diagram)
are required.
• Fit the enclosed filterballs on the incoming pipe.
• Fit the supplied non-return valves on the outgoing
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
EXPANSION VESSEL
The brine circuit must be supplied with a pressure ex-
pansion vessel.
The brine side must be pressurised to at least 0.05 MPa
(0.5 bar).
The pressure expansion vessel should be dimensioned
as set out in the following diagram, to prevent malfunc-
tions. The diagrams cover the temperature range from
10 °C to +20 °C at pre-pressure 0.05 MPa (0.5 bar) and
the safety valve's opening pressure of 0.3 MPa (3.0
bar).
Ethanol 28% (volume percent)
In installations with ethanol (28% volume percent) as
the brine the pressure expansion vessel must be dimen-
sioned according to the following diagram.
00 300 600 12009000 1500
10
20
30
40
50
60
Volym tryckexpansionskärl
(l)
Totalvolym köldbärere i system
(l)
Volume pressure expansion vessel (l)
Total volume brine (l)
Ethylene glycol 40% (volume percent)
In installations with ethylene glycol (40% volume per-
cent) as the brine the pressure expansion vessel must
be dimensioned according to the following diagram.
00 200 400 600 800 1000 1200 1400 1600 1800 2000
10
20
30
40
60
70
50
80
90
100
Volym tryckexpansionskärl
(l)
Total volym köldbärare i system
(l)
Volume pressure expansion vessel (l)
Total volume brine (l)
17Chapter 4 | Pipe connectionsNIBE F1355

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 F1355
and for example radiators, underfloor heating/cooling,
fan convectors etc.
•The pipe connections are on the rear of the heat pump.
• Install the necessary safety equipment and shut-off
valves (installed as close to F1355 as possible so that
the flow to individual cooling modules can be shut
off).
• Fit the enclosed filterballs on the incoming pipe.
• The safety valve must have a maximum 0.6 MPa (6.0
bar) opening pressure and be installed on the heating
medium return. 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.
• 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.
• Fit the supplied non-return valves on the outgoing
pipe.
Caution
When necessary you should install vent valves
in the climate system.
Caution
F1355 is designed so that heating production
can be performed using one or two cooling
modules. However, this entails different pipe
or electrical installations.
Water heater
CONNECTING THE HOT WATER HEATER
• 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
pressure of 1.0 MPa (10.0 bar) and be installed on the
incoming 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.
Caution
The heat pump/system is designed so that hot
water production can be carried out with one
or several cooling modules. However, this en-
tails different pipe or electrical installations. Hot
water production takes place via cooling mod-
ule EP14 as standard.
NIBE F1355Chapter 4 | Pipe connections18

Docking alternatives
F1355 can be connected in several different ways. Ex-
amples are shown below.
Caution
The examples are outline diagrams; items in-
cluded on delivery of the product are set out
in section"Supplied components".
Further information about the options is available at
nibe.eu and in the manuals for the accessories used.
See page 37 for the list of the accessories that can be
used with F1355.
EXPLANATION
External additional heatEB1
External electrical additional heatEB1
Safety valve, heating medium sideFL10
Shut-off valve, heating medium sideQM42, QM43
Trim valveRN11
Heat pump systemEB100, EB101
Temperature sensor, outdoorBT1
Temperature sensor, hot water chargingBT6
Temperature sensor, heating medium flow,
external
BT25
Temperature sensor, heating medium re-
turn, external
BT71
Heat pump F1355 (Master)EB100
Heat pump F1355 (Slave)EB101
Cooling moduleEP14, EP15
Safety valve, collector sideFL10, FL11
Safety valve, heating medium sideFL12, FL13
Filterball (particle filter)QZ2 - QZ5
Shut-off valve, brine sideQM50, QM52
Shut-off valve, heating medium sideQM55, QM57
Reversing valve, heating/hot waterQN10
Non-return valveRM10 - RM13
Hot water circulationQZ1
Accessory cardAA5
Temperature sensor, hot water flowBT70
Mixer valve, hot waterFQ1
Circulation pump, domestic hot water circu-
lation
GP11
Non-return valveRM23, RM24
Trim valveRN20, RN21
Climate system 2EP21
Temperature sensors, heating medium flowBT2
Temperature sensors, heating medium re-
turn
BT3
Circulation pumpGP20
Shunt valveQN25
Miscellaneous
Accessory cardAA5
Manometer, brine sideBP6
Temperature sensor, hot water flowBT7
Accumulator tank with hot water coilCP10
Expansion vessel, closed, heating medium
side
CM1
Expansion vessel, closed, brine sideCM3
Water heaterEB10
Collector, brine sideEP12
Safety valve, heating medium sideFL2
Safety valve, brineFL3
Circulation pump, heating medium externalGP10
Venting valve, brine sideQM21
Shut off valve, brine flowQM33
Shut off valve, brine returnQM34
Non-return valveRM21
Connection, filling brineXL27 - XL28
Designations according to standards 81346-1 and 81346-
2.
F1355 DOCKED WITH ELECTRIC ADDITIONAL HEAT AND WATER HEATER (FLOATING
CONDENSING)
-EB100-BT1
P
-BP6
-CM3
-QM21 -FL3
-QM33 -EB100
-RM11
-RM10-FL10
-FL11
-EP15
-EP14
-RM13
-FL13
-FL12
-FL2
-CM1
-EB100-QN10
-CP10
-EB100-BT6
-EB100-BT7
-EB1
-EB1
-FL10
-QM42
-QM43 -RN11 -RM21 -EB100-BT71
-EB100-BT25 -EB100-GP10
-EB10
-QM57
-RM12 -QM55
-QM52
-QM50
-XL28
-QM34
-EP12
-XL27
-QZ3
-QZ2
-QZ5
-QZ4
19Chapter 4 | Pipe connectionsNIBE F1355

The heat pump (EB100) prioritises charging of hot water with a cooling module (EP14) via a reversing valve (EB100-
QN10). When the water heater/accumulator tank (CP10) is fully charged, (EB100-QN10) switches to the heating
circuit.
Additional heat (EB1) is connected automatically, when the energy requirement exceeds the heat pump capacity.
TWO F1355 DOCKED WITH ELECTRIC ADDITIONAL HEAT AND WATER HEATER (FLOATING
CONDENSING)
-EB100-QN10
-FL3
-BT6
-GP10
-EB100-BT25
-QM43 -EB100-BT71
-EB1
-EB1
-QM42
-FL10
-XL28
-XL27
P
-EB100-BT1
-CM3
-BP6 -QM21
-QM33
-QM34
-EP12
-BT7
-EB101
-CP10
-EB100
-EB100
-EP21 -AA5 -BT2
-QN25
-GP20
-BT3
-RN11
-FL2
-CM1
-GP11
-BT70
-QZ-AA5 -QZ1
-RM23
-RN20
-RM24
-RN21
-FQ1
-EB10
-EB100
-RM11
-RM10 -FL10
-FL11
-EP15
-EP14
-RM13
-FL13
-FL12
-QM57
-RM12 -QM55
-QM52
-QM50
-QZ3
-QZ2
-QZ5
-QZ4
-EB101
-RM11
-RM10 -FL10
-FL11
-EP15
-EP14
-RM13
-FL13
-FL12
-QM57
-RM12 -QM55
-QM52
-QM50
-QZ3
-QZ2
-QZ5
-QZ4
-RM21
The heat pump (EB100) prioritises charging of hot water with a cooling module (EP14) via a reversing valve (EB100-
QN10). When the water heater/accumulator tank (CP10) is fully charged, (EB100-QN10) switches to the heating
circuit. When there is a demand for heat, cooling module (EP15) starts in heat pump (EB101) first. On large demand,
cooling module (EP14) also starts in (EB101) for heating operation.
Additional heat (EB1) is connected automatically, when the energy requirement exceeds the heat pump capacity.
If the water heater/accumulator tank (CP10) is fitted with a peak heater (EB10) plus accessories board (AA5), the
"temporary lux" function can be used.
NIBE F1355Chapter 4 | Pipe connections20