Nibe F370 User guide

Installer manual
LEK
NIBE™ F370
Exhaust air heat pump
IHB GB 1540-3
231470

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 34.
How to scroll through menus and make different settings is described on page 36.
Set the indoor climate
2X
The mode for setting the indoor temperature is accessed by pressing the OK button twice, when in the start mode
in the main menu. Read more about the settings on page 38.
To temporarily increase the amount of hot water, first turn the control knob to mark menu 2 (water droplet) and
then press the OK button twice. Read more about the settings on page 44.
In event of disturbances in comfort
If a disturbance in comfort of any type occurs there are some measures that can be taken before you need to
contact your installer. See page 60 for instructions.

Table of Contents
21 Important information
2Safety information
82 Delivery and handling
8Transport
8Assembly
9Supplied components
9Removing the covers
9Removing parts of the insulation
103 The heat pump design
144 Pipe and ventilation connections
14General pipe connections
15Dimensions and pipe connections
16Symbol key
16Cold and hot water
16Heating medium side
17Installation alternative
18General ventilation connection
18Ventilation flow
18Adjusting ventilation
195 Electrical connections
19General
21Connections
24Settings
25Optional connections
29Connecting accessories
306 Commissioning and adjusting
30Preparations
30Filling and venting
31Start-up and inspection
347 Control - Introduction
34Display unit
35Menu system
388 Control - Menus
38Menu 1 - INDOOR CLIMATE
44Menu 2 - HOT WATER
46Menu 3 - INFO
47Menu 4 - HEAT PUMP
52Menu 5 - SERVICE
569 Service
56Service actions
6010 Disturbances in comfort
60Info menu
60Manage alarm
60Troubleshooting
6211 Accessories
6312 Technical data
63Dimensions and setting-out coordinates
64Technical specifications
68Energy labelling
70Electrical circuit diagram
82Index
1Table of Contents |NIBE™ F370

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 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
understand the hazards involved. Chil-
dren shall not play with the appliance.
Cleaning and user maintenance shall
not be made by children without super-
vision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2015.
Symbols
NOTE
This symbol indicates danger to machine or
person.
Caution
This symbol indicates important information
about what you should observe when main-
taining your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
F370 is CE marked and fulfils IP21.
The CE marking means that NIBE ensures that the
product meets all regulations that are placed on it
based on relevant EU directives. The CE mark is obligat-
ory for most products sold in the EU, regardless where
they are made.
IP21 means that objects with a diameter larger than
or equivalent to 12.5 mm cannot penetrate and cause
damage and that the product is protected against
vertically falling drops of water.
Handling
The heat pump contains highly flammable refrigerant.
Special care should be exercised during handling, in-
stallation, service, cleaning and scrapping to avoid
damage to the refrigerant system and in doing so re-
duce the risk of leakage.
NOTE
Work on the refrigerant system must be done
by authorised personnel in accordance with
the relevant legislation on refrigerants, supple-
mented by additional requirements for flam-
mable gas, for example, product knowledge
as well as service instruction on gas systems
with flammable gases.
Safety precautions
Wiring
Check that cabling will not be subject to wear, corro-
sion, excessive pressure, vibration, sharp edges or any
other adverse environmental effects. The check shall
also take into account the effects of aging or continual
vibration from sources such as compressors or fans.
Repairing sealed components
When repairing sealed components, all electrical supply
must be disconnected from the equipment that is being
repaired before any sealed covers or similar are re-
moved. If it is absolutely necessary to have an electricity
supply to the equipment during the service, continu-
ously activated leak tracing must be performed at the
most critical points in order to warn of any dangerous
situations.
Pay particular attention to the following so that the
sheath is not changed in a way that affects the protec-
tion level when working with electrical components.
This means damage to cables, unnecessary amounts
of connections, terminals that do not follow the original
specifications, damaged gaskets, incorrect grommets
etc.
Ensure that the apparatus is secured properly.
Check that seals or sealing materials have not deterior-
ated to a degree that they can no longer prevent
combustible gases from entering. Replacement parts
must meet the manufacturer's specifications.
NOTE! Use of silicone seals can hamper the efficiency
of certain types of leak tracing equipment. Components
with built in safety do not need to be isolated before
starting work.
When working in the refrigerant circuit
Pipe installation should be kept to a minimum.
Connections in the refrigerant circuit must be carried
out as follows:
■Soldered, welded or mechanical connections must
be made before the valves are opened to allow the
refrigerant to flow between the cooling system parts.
The system must be equipped with a vacuum valve
to relieve connecting pipes and/or any unfilled parts
of the cooling system.
NIBE™ F370Chapter 1 | Important information2
1 Important information

■Reusable mechanical connectors and collared joints
are not permitted indoors.
■Refrigerant pipes must be protected or recessed to
prevent damage.
■Must be accessible for future maintenance.
National gas regulations must be observed.
Maximum amount of refrigerant: See Technical specific-
ations.
■Everyone who works with or opens a refrigerant cir-
cuit must have a current, valid certificate from an
accredited industry issuing body, which states that,
according to the industry's recognised assessment
standard, they have the authority to safely handle
refrigerants.
■Servicing must only be performed according to the
equipment manufacturer's recommendations.
Maintenance and repairs that require the assistance
of another trained person must be carried out under
the supervision of person with the authority to handle
combustible refrigerants.
Maintenance and repair that requires the skill of anoth-
er person must be carried out under the supervision of
someone with the above expertise.
Before work is started on systems that contains com-
bustible refrigerants, safety checks must be performed
to ensure that the ignition risk is kept to a minimum.
The work must be carried out in a controlled way to
minimise the risk of contact with combustible gas or
liquid during the work.
All maintenance staff and those who work in close
proximity to the product must be instructed which type
of work is to be carried out. Avoid carrying out work
in enclosed spaces. The area surrounding the worksite
must be cordoned off. Ensure that the area is made
safe by removing combustible material.
Check whether there is refrigerant in the area using a
suitable refrigerant detector prior to and during work,
to notify the service technician whether there is a pos-
sible flammable atmosphere or not. Ensure that the
refrigerant detector is suitable for combustible refriger-
ant, i.e. does not generate sparks or cause ignition in
any other way.
If hot work is carried out on the heat pump, a powder
or carbon dioxide fire extinguisher must be to hand.
Those who carry out work with refrigerant system
connections, including exposing pipes that contain or
have contained combustible refrigerant, may not use
potential ignition sources in such a way that that can
lead to risks of fire or explosions.
All potential ignition sources, including cigarette
smoking, should be kept at a safe distance from the
service work area where combustible refrigerant can
leak out. Before carrying out work, the area surround-
ing the equipment must be checked to ensure that
there are no ignition risks. "No smoking" signs must be
displayed.
Ensure that the work is carried out outdoors or that
the work area is ventilated before the system is opened
and before any hot work is carried out. The area must
be ventilated whilst the work is being carried out. There
must be ventilation around any refrigerant that comes
out, which should be routed outdoors.
If electrical components are replaced, the replacement
parts must be fit for purpose and have the correct
technical specifications. Always follow the manufac-
turer's guidelines regarding maintenance and servicing.
Contact the manufacturer's technical department in
the event of any doubts.
The following checks must be carried out for installa-
tions that use combustible refrigerants.
■The filling quantity is appropriate for the size of the
space where the parts that contain refrigerant are
installed.
■Ventilation equipment and outlet work correctly and
without obstructions.
■If an indirect refrigerant circuit is used, check
whether the secondary circuit contains refrigerant.
■All markings of equipment are visible and clear.
Markings, signs and similar that are not clear must
be replaced.
■Refrigerant pipes and components are positioned in
such a way that it is not likely that they be subjected
to substances that can corrode components contain-
ing refrigerant, if these components are not made
of material that is resistant against corrosion, or not
appropriately protected against such corrosion.
Repair and maintenance of electrical components must
include initial safety checks and procedures for com-
ponent inspection. In the event of a fault, which can
cause a safety risk, do not supply any power to the cir-
cuit until the fault has been rectified. If the fault cannot
be rectified immediately, and operation must continue,
an adequate temporary solution must be implemented.
This must be reported to the equipment owner, so that
all parties have been informed.
The following checks must be carried out at the initial
safety checks.
■That the capacitors are discharged. Discharging must
be done safely, to prevent the risk of sparking.
■That no powered electrical components or live cables
are exposed when filling or collecting refrigerant or
when the system is flushed.
■That the system is continually grounded.
Removal and draining
When a cooling circuit is opened for repairs – or for
another reason– work must be carried out in a conven-
tional manner. Due to the risk of fire it is important that
best practice is applied. Follow the procedure below.
1. Drain the refrigerant.
2. Flush the circuit with inert gas.
3. Drain the circuit.
4. Flush again with inert gas.
5. Open the circuit by cutting or burning.
Collect the refrigerant in the intended container. Flush
the system with oxygen-free nitrogen to make the
device safe. This process may need to be repeated
several times. Compressed air and oxygen may not be
used.
3Chapter 1 | Important informationNIBE™ F370

Flush the system by breaking the vacuum with oxygen-
free nitrogen, and filling the system to working pres-
sure, relieving the pressure to atmospheric pressure
and finally pumping to vacuum. Repeat the process
until no refrigerant remains in the system. After the fi-
nal filling of oxygen-free nitrogen, relieve the pressure
in the system to atmospheric pressure, so that work
can be carried out. This type of flushing must be carried
out if hot work is to be performed on the pipe system.
Ensure that the vacuum pump's outlet is not near to
ignition sources and that there is satisfactory ventilation
by the outlet.
Filling
In addition to the conventional filling procedures, the
following actions must be taken.
■Ensure that different refrigerants are not mixed when
filling equipment is used. Hoses and lines must be as
short as possible to minimise the enclosed refrigerant
volume.
■Containers must be stored upright.
■Ensure that the cooling system is grounded before
the system is filled with refrigerant.
■Mark the system once filling is complete (if not
already marked).
■Take extra care not to overfill the cooling system.
Before refilling the system, pressure test it with oxygen-
free nitrogen. Leak test the system after filling but be-
fore using the system. Perform an additional leak test
before leaving the installation.
Leak testing
The following leak detection methods are deemed ac-
ceptable for systems containing flammable refrigerants.
Electronic leak detectors shall be used to detect flam-
mable refrigerants, but the sensitivity may not be ad-
equate, or may need re-calibration. (Detection equip-
ment shall be calibrated in a refrigerant-free area.) En-
sure that the detector is not a potential source of igni-
tion and is suitable for the refrigerant used. Leak detec-
tion equipment shall be set at a percentage of the LFL
of the refrigerant and shall be calibrated to the refriger-
ant employed and the appropriate percentage of gas
(25 % maximum) is confirmed.
Leak detection fluids are suitable for use with most re-
frigerants but the use of detergents containing chlorine
shall be avoided as the chlorine may react with the re-
frigerant and corrode the copper pipe-work.
If a leak is suspected, all naked flames shall be re-
moved/extinguished.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from
the system, or isolated (by means of shut off valves) in
a part of the system remote from the leak. Oxygen free
nitrogen (OFN) shall then be purged through the sys-
tem both before and during the brazing process.
Decommissioning
Before performing this procedure, the technician must
be familiar with the equipment and all its component
parts. Good practice prescribes that all refrigerant is
collected safely. Before the work is carried out, samples
of oil and refrigerant must be taken, if analyses are re-
quired before collected refrigerant can be reused. There
must be a power supply when this task is started.
1. Familiarise yourself with the equipment and its use.
2. Isolate the system electrically.
3. Before starting the procedure, ensure that:
necessary equipment for mechanical handling of
the refrigerant container is available
all necessary personal safety equipment is available
and used correctly
the collection process is continuously supervised
by an authorised person
the collection equipment and containers meet
appropriate standards.
4. Pump the refrigerant system to vacuum, if possible.
5. If it is not possible to pump to vacuum, manufac-
ture a branch, so that the refrigerant can be re-
trieved from different parts of the system.
6. Check that the refrigerant container is on the scales
before starting to collect.
7. Start the collection device and collect according to
the manufacturer's instructions.
8. Do not overfill the containers (max. 80 % (volume)
liquid content).
9. Do not exceed the containers' maximum permitted
working pressure – not even temporarily.
10. When the containers have been filled correctly and
the process is complete, close all shut-off valves in
the equipment and remove and containers and
equipment from the installation immediately.
11. The collected refrigerant must not be filled in any
other system before being cleaned and checked.
Marking
The equipment must be marked stating that it has been
taken out of operation and drained of refrigerant. The
marking must be dated and signed. Check that the
equipment is marked indicating that it contains com-
bustible refrigerant.
Collection
Best practice prescribes that all refrigerant is collected
safely when the refrigerant is drained from a system,
either for servicing or for decommissioning.
The refrigerant must only be collected in suitable refri-
gerant containers. Ensure that the required number of
containers, that can hold the entire volume of the sys-
tem, are available. All containers that are to be used
must be intended for the collection of the refrigerant
and marked for this refrigerant (especially designed
for the collection of refrigerant). The containers must
have the correctly functioning relief valves and shut-
off valves. Empty collection containers must be drained
and, if possible, chilled before collection.
The collection equipment must function correctly and
instructions for the equipment must be to hand. The
equipment must be suitable for the collection of com-
bustible refrigerant.
Fully functioning and calibrated scales must also be to
hand.
NIBE™ F370Chapter 1 | Important information4

Hoses must be in good condition and be equipped with
leak proof quick-couplings. Before using the collecting
machine, check that it works correctly and has been
well maintained, and that corresponding electrical
components are sealed, to prevent ignition if any refri-
gerant should come out. Contact the manufacturer in
the event of any doubts.
Return the collected refrigerant to the refrigerant
supplier in the correct collection container and with
the relevant Waste Transfer Note. Do not mix refriger-
ants in collection devices or containers.
If compressors/compressor oil are/is to be removed
ensure that the affected device is drained to an accept-
able level to ensure that no combustible refrigerant
remains in the lubricant. Compressors must be drained
before being returned to the supplier. Only electrical
heating of the compressor housing may be used to
quicken draining. Drain oil from the system in a safe
manner.
Serial number
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1).
Serial number
Caution
Always give the product's serial number (14
digits) when reporting a fault.
Country specific information
Installer manual
This installer manual must be left with the customer.
5Chapter 1 | Important informationNIBE™ F370

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. Fill in the page for information about installation data in the User
manual.
DateSignatureNotesDescription
✔
Ventilation (page 18)
Setting the ventilation flow
Connecting ground cables
Heating medium (page 16)
System flushed
System vented
Circulation pump setting
Setting heating medium flow
Boiler pressure
Electricity (page 19)
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor (only copper version)
Safety breaker
Earth circuit-breaker
Warranty
NIBE™ F370Chapter 1 | Important information6

Contact information
KNV Energietechnik GmbH, Gahberggasse 11, 4861 SchörflingAT
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.knv.at
NIBE Wärmetechnik c/o ait Schweiz AG, Industriepark, CH-6246 AltishofenCH
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.ch
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad JizerouCZ
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.cz
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 CelleDE
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.de
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 VidebækDK
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.volundvt.dk
NIBE Energy Systems OY, Juurakkotie 3, 01510 VantaaFI
Puh: 09-274 697 0 Fax: [phone] E-mail: inf[email protected] www.nibe.fi
NIBE Energy Systems France Sarl, Zone industrielle RD 28, Rue du Pou du Ciel, 01600 ReyrieuxFR
Tel : [phone] Fax : [phone] E-mail: inf[email protected] www.nibe.fr
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, Chesterfield S41 9QGGB
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.co.uk
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP OosterhoutNL
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibenl.nl
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 OsloNO
Tel. sentralbord: [phone] E-mail: [email protected] www.nibeenergysystems.no
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOKPL
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.biawar.com.pl
© "EVAN" 17, per. Boynovskiy, Nizhny NovgorodRU
Tel./fax [phone] E-mail: [email protected] www.nibe-evan.ru
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 MarkarydSE
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.se
For countries not mention in this list, please contact Nibe Sweden or check www.nibe.eu for more information.
7Chapter 1 | Important informationNIBE™ F370

Transport
F370 should be transported and stored vertically in a
dry place. However. the F370 may be carefully laid on
its back when being moved into a building. The centre
of gravity is in the upper part.
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
Assembly
■Position F370 on a firm base that can take the weight,
preferably on a concrete floor or foundation. Use the
product's adjustable feet to obtain a horizontal and
stable set-up.
30 - 50 mm
30 - 50 mm
15 - 40 mm
■The area where F370 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 elim-
inate 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.
■The heat pump's boiler room should always have a
temperature of at least 10 °C and max 30 °C.
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. The panels do not need to be
removed during service, all service on F370 can be
carried out from the front. Leave space between the
heat pump and wall behind (and any routing of supply
cables and pipes), to reduce the risk of any transmission
of vibrations.
800
10-50* 10-50*
10-25
* Depending on whether the panels can be removed or not.
NOTE
Ensure that there is sufficient space (300 mm)
above the heat pump for installing ventilation
hoses.
NIBE™ F370Chapter 2 | Delivery and handling8
2 Delivery and handling

Supplied components
Room sensorOutside sensor
LEK
LEK
LEK
Current sensorEarth cable
Location
The kit of supplied items is placed on top of the
product.
Removing the covers
Front cover
4
1
2
3
1. Remove the air treatment hatch by pulling it
straight out.
2. Remove the screws from the lower edge of the
front cover.
3. Lift the cover out at the bottom edge and up.
4. Pull the hatch towards yourself.
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 backwards and slightly to the side.
4. Pull the cover to one side.
5. Pull the hatch forwards.
Removing parts of the insula-
tion
Parts of the insulation can be removed to facilitate the
installation.
Insulation, top
1. Grip the handle and pull straight out as illustrated.
LEK
9Chapter 2 | Delivery and handlingNIBE™ F370

F370, copper
LEK / APH
LEK / APH
LEK
LEK
LEK
LEK
PBD sv
BP5
QM20
GP1XL3FL2FL1CM1QM31XL1XL4QM32WM1
QN11 MA1QM11 FL6
EB1
FA1
AA1
FD1
AA3
AA2
UB1
UB2
AA4
SF1
UR1GQ10EP1 GQ2
EB10QN1 CA1 HZ1
XL32 XL31
QM10
PF3
PF1
XL2
WM2
XL32 XL31
BT20
GQ10
EB10
GQ2
CA1
AA4
SF1
FA1
BP5
CM1 GP1
FL6 MA1
WM1 XL1
AA1
BT30
FD1
BT16
EP1
EB1
QN1
BP1 BP2 BT21
BT18
BT19
QM20
FL2
BT2
QM10XL3QM31XL4 WP1XL2 QM32
QM11WP3
XL8 WP2
QN11
PF1
FL1
BT3
HZ2
UR1
BT7
WM2
PF3
UB2
UB1
AA2
BT6
RF3
AA100
AA4-XJ4
AA4-XJ3
AA3
W130
NIBE™ F370Chapter 3 | The heat pump design10
3 The heat pump design

F370, enamel
LEK / APH
LEK
LEK
XL32 XL31
BT20
GQ10
EB10
GQ2
CA1
AA4
SF1
FA1
BP5
CM1
FL2 MA1
WM1 XL1
AA1
BT30
FD1
BT16
EP1
EB1
QN1
BP1 BP2 BT21
BT18
BT19
QM20
FL1
BT2
GP1QM10QM31XL4 WP2XL2 QM32
QM11WP3
XL8 WP1
QN11
XL3
BT3
HZ2
UR1
BT7
WM2
UB2
UB1
AA8
AA2
RA2
AA100
PF1
PF3
BT6
RF3
AA4-XJ4
AA4-XJ3
AA3
W130
11Chapter 3 | The heat pump designNIBE™ F370

F370, stainless steel
LEK / APH
LEK
LEK
XL32 XL31
BT20
GQ10
EB10
GQ2
CA1
AA4
SF1
AA2
FA1
BP5
CM1
QN11 MA1
WM1 XL1
AA1
BT30
FD1
BT16
EP1
EB1
QN1
BP1 BP2 BT21
BT18
BT19
QM20
FL1
BT2
QM10FL2QM31XL4 QM11XL2 QM32
FQ1WP3
XL8 WP1
WP2
XL3
BT3
HZ2
UR1
BT7
WM2
UB2
UB1
GP1
AA100
QM13 RA2
PF1
PF3
BT6
RF3
AA4-XJ4
AA4-XJ3
AA3
W130
NIBE™ F370Chapter 3 | The heat pump design12

Pipe connections
Connection, heating medium flow lineXL 1
Connection, heating medium return lineXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
Connection, docking inXL 8
Connection, draining heating medium4 XL 10
Ventilation connection, exhaust airXL 31
Ventilation connection, extract airXL 32
HVAC components
Expansion vesselCM 1
Safety valve, water heaterFL 1
Safety valve, climate systemFL 2
Vacuum valve2 FL 6
Mixer valve, hot water2, 3 FQ 1
Circulation pumpGP 1
Filler valve, hot water heater2, 3 QM 10
Filler valve, climate system2, 3 QM 11
Filler valve 2, climate system2, 3 QM 13
Venting, heating mediumQM 20
Shut-off valve, heating medium flowQM 31
Shut off valve, heating medium returnQM 32
Shunt valveQN 11
TundishWM 1
Overflow water dischargeWM 2
Overflow pipe, safety valve hot water heaterWP 1
Overflow pipe, safety valve climate systemWP 2
Overflow pipe, condensationWP 3
Sensors etc.
High pressure pressostatBP 1
Low pressure pressostatBP 2
Pressure gauge, heating systemBP 5
Outside sensor1 BT 1
Temperature sensors, heating medium flowBT 2
Temperature sensors, heating medium returnBT 3
Temperature sensor, hot water, controlBT 6
Temperature sensor, hot water, displayBT 7
Temperature sensor, evaporator1 BT 16
Temperature sensor, compressor operationBT 18
Temperature sensor, immersion heater opera-
tion
BT 19
Temperature sensor, exhaust airBT 20
Temperature sensor, extract airBT 21
Thermostat, backup heatingBT 30
Room sensor1 BT 50
Electrical components
Immersion heater cardAA 1
Base cardAA 2
Input circuit boardAA 3
Display unitAA 4
AA4-XJ3 USB socket
AA4-XJ4 Service socket
Sacrificial anode card4 AA 8
Connection card air treatment section, exhaust
air
AA100
CapacitorCA 1
Immersion heaterEB 1
Compressor heaterEB 10
Miniature circuit-breakerFA 1
Miniature circuit-breakerFA 2
Temperature limiterFD 1
Shunt motor with hand wheelMA 1
EMC-filterRF 3
SwitchSF 1
Network cable for NIBE UplinkTM W130
Cooling components
EvaporatorEP 1
CompressorGQ 10
Drying filter1 HZ 2
Expansion valve1 QN 1
Ventilation
Exhaust air fanGQ 2
Exhaust air filter1 HQ 10
Filter cover, exhaust airUR 1
Miscellaneous
Rating platePF 1
Serial number platePF 3
Cable glandUB1
Cable glandUB2
1Not visible in the image
2Only heat pumps with copper vessel.
3Only heat pumps with stainless steel vessel.
4Only heat pump with enamelled vessel.
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
13Chapter 3 | The heat pump designNIBE™ F370

General pipe connections
Pipe installation must be carried out in accordance with
current norms and directives.
The system requires a low-temperature design of the
radiator circuit. At lowest dimensioned outdoor tem-
perature (DOT) the highest recommended temperat-
ures are 55 °C on the supply line and 45 °C on the re-
turn line.
Overflow water from the evaporator collection tray
and safety valves goes via non-pressurised collecting
pipes to a drain so that hot water splashes cannot cause
injury. The entire length of the overflow water pipe
must be inclined to prevent water pockets and must
also be frost proof.
NOTE
The pipe system needs to be flushed out be-
fore the heat pump is connected so that any
debris cannot damage component parts.
Maximum boiler and radiator volumes
H
The volume of the pressure expan-
sion vessel (CM1) is 10 litres and it
is pressurised as standard to 0.5
bar ((5 mvp). As a result, the max-
imum permitted height "H"
between the vessel and the
highest radiator is 5 metres; see
figure.
If the standard initial pressure in
the pressure vessel is not high
enough it can be increased by
adding air via the valve in the ex-
pansion vessel. The initial pressure
of the expansion vessel must be
stated in the inspection document. Any change in the
initial pressure affects the ability of the expansion vessel
to handle the expansion of the water.
The maximum system volume excluding the boiler is
219 litres at the above pre-pressure.
System diagram
F370 consists of a heat pump, water heater, immersion
heater, fan, circulation pump and control system.F370
is connected to the ventilation system and heating
medium circuits.
When the exhaust air at room temperature passes
through the evaporator, the refrigerant evaporates
because of its low boiling point. In this way the energy
in the room air is transferred to the refrigerant.
The refrigerant is then compressed in a compressor,
causing the temperature to rise considerably.
The warm refrigerant is led to the condenser. Here the
refrigerant gives off its energy to the boiler water,
whereupon the refrigerant changes state from gas to
liquid.
The refrigerant then goes via filters to the expansion
valve, where the pressure and temperature are reduced.
The refrigerant has now completed its circulation and
returns to the evaporator.
XL1XL3XL4XL8XL2
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
Connection, dockingXL 8
NIBE™ F370Chapter 4 | Pipe and ventilation connections14
4 Pipe and ventilation connections

Dimensions and pipe connec-
tions
B
A
C
Copper
WM1 XL2 XL1XL3XL4XL8
Enamel
WM1 XL2 XL1XL3XL4XL8
Stainless steel
WM1 XL2 XL1XL3XL4XL8
Setting out dimensions
CBAConnection, copper
70400140(mm)XL1 Heating medium
supply
365425120(mm)XL2 Heating medium re-
turn
210455165(mm)XL3 Cold water
260400170(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
CBAConnection, enamel
70400140(mm)XL1 Heating medium
supply
365425120(mm)XL2 Heating medium re-
turn
210455165(mm)XL3 Cold water
260400170(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
CBAConnection, stainless
steel
70400140(mm)XL1 Heating medium
supply
365425120(mm)XL2 Heating medium re-
turn
210455165(mm)XL3 Cold water
260400140(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
Pipe dimensions
Connection
22(mm)XL1-XL2 Heating medium ext Ø
22(mm)XL3 Cold water ext Ø
22(mm)XL4 Hot water ext Ø
22(mm)XL8 Docking ext. Ø
32(mm)WM2 Overflow water discharge
15Chapter 4 | Pipe and ventilation connectionsNIBE™ F370

Symbol key
MeaningSymbol
Venting valve
Shut-off valve
Trim valve
Shunt / shuttle valve
Safety valve
Temperature sensor
Expansion vessel
Pressure gauge
P
Circulation pump
Particle filter
Compressor
Heat exchanger
Cold and hot water
Connecting cold and hot water
A mixer valve must also be installed if the factory set-
ting for hot water is changed. National regulations
must be observed. The setting is made in menu 5.1.1
(page 52).
Heating medium side
Connecting the climate system
NIBE™ F370Chapter 4 | Pipe and ventilation connections16

Installation alternative
F370 can be installed in several different ways, some
of which are shown below.
Further option information is available at www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 62 for a list of the accessories
that can be used with F370.
Extra hot water heaters
Extra hot water heaters
The heat pump should be supplemented with an elec-
tric water heater, if a hot tub or other significant con-
sumer of hot water is installed.
Water heater with immersion heater
If it is possible to use a water heater with an immersion
heater, NIBE COMPACT or EMINENT type water heaters
can be used.
If the valve connector is to be installed externally,
moved out or separated, it must be replaced with a
separable connector Ø 22 mm.
KV
VV
VV
INK KV-ANSL
PROPPNING
KV
VV-BEREDARE
MED "DELAT"
VENTILKOPPEL
BACKVENTIL
Kv
Vv från värmepump
Vv
Proppas
Backventil
KV
VV
VV
INK KV-ANSL
KV
BACKVENTIL
I produktblad
BLANDNINGSVENTIL
Ventilkoppel-del
Blandningsventil-del
Kv
Vv från värmepump
Vv
Backventil
Blandningsventil
Inkoppling av spetsberedare utan delbart
ventilkoppel.
HW fromF370
CW
Non-return valve
HW
Mixing valve
Two or more climate systems
When more than one climate system is to be heated,
the following connection can be used.
The ECS 40/ECS 41 accessory is required for this con-
nection.
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 ｰC at the extremities of the system.
The circulation pump for hot water circulation can be
controlled by the heat pump. The HWC return can be
connected to a freestanding water heater.
17Chapter 4 | Pipe and ventilation connectionsNIBE™ F370

General ventilation connection
Ventilation installation must be carried out in accord-
ance with current norms and directives.
To prevent fan noise being transferred to the ventila-
tion devices, it may be a good idea to install a silencer
in the duct. This is especially important if there are
ventilation devices in noise sensitive rooms.
Connections must be made via flexible hoses, which
must be installed so that they are easy to replace. The
extract air duct must be provided with diffusion-tight
insulation (PE30) over its entire length. Ensure that the
condensation insulation is sealed at any joints and/or
at lead-in nipples, silencers, roof cowls or similar. Provi-
sion must be made for inspection and cleaning of the
duct. Make sure that there are no reductions of cross-
sectional area in the form of kinks, tight bends etc.,
since this will reduce the ventilation capacity. The air
duct system must be a minimum of air tightness class
B. The extract air duct must be a maximum of 20 m
long with a maximum of six bends.
Because the heat pump contains the flammable refri-
gerant propane (R290), the air ducting system must be
grounded. This is done by making a good electrical
connection to the ground cables enclosed (2 x) to each
extract air and exhaust air ducts. The cables must then
be connected to the ground studs on top of the top
cover.
Exhaust air duct /kitchen fan
Exhaust air duct (kitchen fan) must not be connected
to F370.
To prevent food vapour being transferred to F370 the
distance between the kitchen fan and the exhaust air
device must be considered. The distance should not be
less than 1.5 m, but this can vary between different
installations.
Always use a kitchen fan when cooking.
NOTE
A duct in a masonry chimney stack must not
be used for extract air.
595
145
440
560 440
2075
25-50
615 35
335
60
120
60
600
200
550
Undvik rördragning
inom markerat område
LEK
Extract air
Exhaust air
Ventilation flow
Connect F370 so that all exhaust air except exhaust air
duct air (kitchen fan) passes the evaporator (EP1) in
the heat pump. Lowest ventilation flow must fulfil ap-
plicable standards. For optimum heat pump operation
the ventilation flow must not fall below 28 l/s (100
m³/h) at an exhaust air temperature of at least 20 °C.
At times when the exhaust air temperature is below
20 °C (for example on start up and when there is no
one in the accommodation) the minimum value is 31
l/s (110 m³/h).
The heat pump’s installation area should be ventilated
by at least 5 l/s (18 m³/h). The installation area must
have a volume of at least 8 m³.
Ensure that the ventilation openings are not blocked.
Set the ventilation capacity in the heat pump's menu
system (menu 5.1.5).
Adjusting ventilation
To obtain the necessary air exchange in every room of
the house, the exhaust air devices must be correctly
positioned and adjusted and the fan in the heat pump
adjusted.
Immediately after installation adjust the ventilation so
that it is set according to the projected value of the
house.
A defective ventilation installation may lead to reduced
installation efficiency and thus poorer operating eco-
nomy, and may result in moisture damage to the house.
NIBE™ F370Chapter 4 | Pipe and ventilation connections18