Nibe F470 User guide

IHB EN 1836-2
431679
INSTALLER MANUAL
Exhaust air heat pump
NIBE F470

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 42.
How to scroll through menus and make different settings is described on page 44.
Set the indoor climate
2X
INDOOR CLIMATE
HEAT PUMP INFO
HOT WATER
The mode for setting the indoor temperature is accessed by pressing the OK button twice, when in the start
mode in the main menu.
Increase hot water volume
2X
1X
To temporarily increase the amount of hot water, first turn the control knob to mark menu 2 (water droplet)
and then press the OK button twice.

41 Important information
4Safety information
4Symbols
4Marking
4Handling
5Safety precautions
10Serial number
10Recovery
11Inspection of the installation
122 Delivery and handling
12Transport
12Assembly
13Supplied components
13Removing the covers
13Removing parts of the insulation
143 The heat pump design
14General
16Air treatment unit and compressor module
174 Pipe and ventilation connections
17General pipe connections
18Dimensions and pipe connections
19Symbol key
19Cold and hot water
19Heating medium side
20Supply air battery
20Installation alternative
21General ventilation connection
21Ventilation flow
21Adjusting ventilation
22Dimension and ventilation connections
235 Electrical connections
23General
25Connections
28Settings
30Optional connections
34Connecting accessories
356 Commissioning and adjusting
35Preparations
35Filling and venting
36Start-up and inspection
427 Control - Introduction
42Display unit
43Menu system
468 Control - Menus
46Menu 1 - INDOOR CLIMATE
46Menu 2 - HOT WATER
47Menu 3 - INFO
47Menu 4 - HEAT PUMP
48Menu 5 - SERVICE
539 Service
53Maintenance
53Service actions
5810 Disturbances in comfort
58Info-menu
58Manage alarm
58Troubleshooting
6111 Accessories
6312 Technical data
63Dimensions and setting-out coordinates
64Technical specifications
66Energy labelling
68Electrical circuit diagram
80Item register
83Contact information
3Table of ContentsNIBE F470
Table of Contents

Safety information
This manual describes installation and service proced-
ures for implementation by specialists.
The manual must be left with the customer.
This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or mental
capabilities or lack of experience and
knowledge if they have been given super-
vision or instruction concerning use of the
appliance in a safe way and understand
the hazards involved. Children shall not
play with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2018.
Water may drip from the safety valve's
overflow pipe, so this pipe must be inclined
along its entire length to prevent water
pockets. It must also be frost-proof. The
overflow pipe must be visible and its outlet
must be open.
F470 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
Fire hazard!
Read the User Manual.
Read the Installer Manual.
Handling
The heat pump contains highly flammable refrigerant.
Special care should be exercised during handling, install-
ation, service, cleaning and scrapping to avoid damage
to the refrigerant system, and thereby reduce the risk
of leakage.
NIBE F470Chapter 1 | Important information4
1 Important information

NOTE
Work on the refrigerant system must be carried
out by authorised personnel, in accordance
with the relevant legislation on refrigerants and
supplemented by the additional requirements
for flammable gas; for example, product
knowledge as well as service instructions for
gas systems with flammable gases.
Safety precautions
WARNING!
Do not use agents to speed up the
defrosting process or for cleaning,
other than those recommended by
the manufacturer.
The apparatus must be stored in a
room with no continuous ignition
sources (e.g. naked flame, an active
gas installation or an active electric
heater).
Must not be punctured or burned.
Be aware that the refrigerant may be
odourless
GENERAL
Pipe installation should be kept to a minim-
um.
AREA CHECKS
Before work is started on systems that con-
tains combustible refrigerants, safety checks
must be performed to ensure that the ignition
risk is kept to a minimum.
WORKING METHOD
The work must be carried out in a controlled
way to minimise the risk of contact with
combustible gas or liquid during the work.
GENERAL FOR THE WORKING RANGE
All maintenance staff and those who work
in close proximity to the product must be in-
structed 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 ma-
terial.
CHECK FOR THE PRESENCE OF
REFRIGERANT
Check whether there is refrigerant in the area
using a suitable refrigerant detector prior to
and during work, to notify the service techni-
cian whether there is a possible flammable
atmosphere or not. Ensure that the refriger-
ant detector is suitable for combustible refri-
gerant, i.e. does not generate sparks or cause
ignition in any other way.
PRESENCE OF FIRE EXTINGUISHERS
If hot work is carried out on the heat pump,
a powder or carbon dioxide fire extinguisher
must be to hand.
ABSENCE OF IGNITION SOURCES
Those who carry out work with refrigerant
system connections, including exposing
pipes that contain or have contained combust-
ible 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 cigar-
ette smoking, should be kept at a safe dis-
tance from the service work area where
combustible refrigerant can leak out. Before
carrying out work, the area surrounding the
equipment must be checked to ensure that
there are no ignition risks. "No smoking" signs
must be displayed.
VENTILATED AREA
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.
CHECKING COOLING EQUIPMENT
If electrical components are replaced, the
replacement parts must be fit for purpose
and have the correct technical specifications.
Always follow the manufacturer's guidelines
regarding maintenance and servicing. Contact
the manufacturer's technical department in
the event of any doubts.
5Chapter 1 | Important informationNIBE F470

The following checks must be carried out for
installations that use combustible refriger-
ants.
•The filling quantity is appropriate for the
size of the space where the parts that
contain refrigerant are installed.
•Ventilation equipment and outlet work cor-
rectly and without obstructions.
•If an indirect refrigerant circuit is used,
check whether the secondary circuit con-
tains 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 po-
sitioned in such a way that it is not likely
that they be subjected to substances that
can corrode components containing refriger-
ant, if these components are not made of
material that is resistant against corrosion,
or not appropriately protected against such
corrosion.
CHECKING ELECTRICAL EQUIPMENT
Repair and maintenance of electrical compon-
ents must include initial safety checks and
procedures for component inspection. In the
event of a fault, which can cause a safety
risk, do not supply any power to the circuit
until the fault has been rectified. If the fault
cannot be rectified immediately, and opera-
tion 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. Dischar-
ging must be done safely, to prevent the
risk of sparking.
•That no powered electrical components or
live cables are exposed when filling or col-
lecting refrigerant or when the system is
flushed.
•That the system is continually earthed.
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 removed. If
it is absolutely necessary to have an electri-
city supply to the equipment during the ser-
vice, continuously 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 protection 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, in-
correct grommets etc.
Ensure that the apparatus is secured prop-
erly.
Check that seals or sealing materials have
not deteriorated to a degree that they can no
longer prevent combustible gases from en-
tering. Replacement parts must meet the
manufacturer's specifications.
NOTE
Use of silicone seals can hamper the
efficiency of certain types of leak-tra-
cing equipment. Components with
built in safety do not need to be isol-
ated before starting work.
WIRING
Check that cabling will not be subject to
wear, corrosion, excessive pressure, vibra-
tion, sharp edges or any other adverse envir-
onmental effects. The check shall also take
into account the effects of aging or continual
vibration from sources such as compressors
or fans.
LEAK TESTING
The following leak detection methods are
deemed acceptable for systems containing
flammable refrigerants.
NIBE F470Chapter 1 | Important information6

Electronic leak tracers must be used to de-
tect combustible refrigerant; but the leak
tracer may not be sufficiently sensitive or
may need to be recalibrated (the leak tracing
equipment must be calibrated in an area
completely free from refrigerant). The leak
tracer must not be a potential source of igni-
tion and must be suitable for the relevant
refrigerant. The leak tracing equipment must
be set and calibrated for the relevant refriger-
ant, to ensure that the gas concentration is
a maximum of 25% of the lowest combust-
ible concentration (Lower Flammability Limit,
LFL) of the relevant refrigerant.
Leak detection fluids are suitable for use with
most refrigerants but the use of detergents
containing chlorine shall be avoided as the
chlorine may react with the refrigerant and
corrode the copper pipe-work.
If a leak is suspected, all naked flames shall
be removed/extinguished.
If a leakage of refrigerant is found which re-
quires 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 system both before and during the braz-
ing process.
REMOVAL AND DRAINING
When a cooling circuit is opened for repairs
– or for another reason– work must be carried
out in a conventional manner. Due to the risk
of fire it is important that best practice is ap-
plied. 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 contain-
er. Flush the system with oxygen-free nitro-
gen to make the device safe. This process
may need to be repeated several times.
Compressed air and oxygen may not be
used.
Flush the system by breaking the vacuum
with oxygen-free nitrogen, and filling the
system to working pressure, relieving the
pressure to atmospheric pressure and finally
pumping to vacuum. Repeat the process
until no refrigerant remains in the system.
After the final filling of oxygen-free nitrogen,
relieve the pressure in the system to atmo-
spheric 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 proced-
ures, 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 pos-
sible 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 before using the sys-
tem. Perform an additional leak test before
leaving the installation.
DECOMMISSIONING
Before performing this procedure, the tech-
nician 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 required before collected refri-
gerant can be reused. There must be a power
supply when this task is started.
7Chapter 1 | Important informationNIBE F470

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,
manufacture a branch, so that the refriger-
ant can be retrieved 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 ac-
cording 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 equip-
ment 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 combust-
ible 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 refrigerant containers. Ensure that
the required number of containers, that can
hold the entire volume of the system, 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 re-
frigerant). 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 cor-
rectly and instructions for the equipment
must be to hand. The equipment must be
suitable for the collection of combustible re-
frigerant.
Fully functioning and calibrated scales must
also be to hand.
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 refrigerant should come out. Contact
the manufacturer in the event of any doubts.
Return the collected refrigerant to the refri-
gerant supplier in the correct collection con-
tainer and with the relevant Waste Transfer
Note. Do not mix refrigerants in collection
devices or containers.
If compressors/compressor oil are/is to be
removed ensure that the affected device is
drained to an acceptable level to ensure that
no combustible refrigerant remains in the
lubricant. Compressors must be drained be-
fore 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.
NIBE F470Chapter 1 | Important information8

MISCELLANEOUS
Maximum amount of refrigerant: See Tech-
nical specifications.
•Everyone who works with or opens a refri-
gerant circuit must have a current, valid
certificate from an accredited industry issu-
ing 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 recom-
mendations.
Maintenance and repairs that require the as-
sistance of another trained person must be
carried out under the supervision of person
with the authority to handle combustible re-
frigerants.
Maintenance and repair that requires the skill
of another person must be carried out under
the supervision of someone with the above
expertise.
9Chapter 1 | Important informationNIBE F470

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
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.
NIBE F470Chapter 1 | Important information10

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
✔
Ventilation (page 21)
Setting ventilation flow exhaust air
Setting ventilation flow supply air
Connecting ground cables
Heating medium (page 19)
System flushed
System vented
Safety valve
Circulation pump setting
Setting heating medium flow
Pressure in the climate system
Setting trim valve, number of turns from
closed position
Electricity (page 23)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor
Safety breaker
Earth circuit-breaker
11Chapter 1 | Important informationNIBE F470

Transport
F470 should be transported and stored vertically in a dry
place. The F470 may, however, be carefully laid on its
back when being moved into a building.
R
0
R
0
Assembly
• Position F470 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.
Because water comes from F470, the floor coating is
important. A waterproof floor or floor membrane is
recommended.
30 - 50 mm
30 - 50 mm
15 - 40 mm
20-55 mm
•Because water comes from F470, it is good if the area
where the heating pump is located is provided 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.
• The heat pump's installation area 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.
Leave free space between F470 and wall/other ma-
chinery/fittings/cables/pipes etc. It is recommended that
a space of at least 10 mm is left to reduce the risk of
noise and of any vibrations being propagated.
800
NOTE
Ensure that there is sufficient space (300 mm)
above the heat pump for installing ventilation
hoses.
NIBE F470Chapter 2 | Delivery and handling12
2 Delivery and handling

Supplied components
Room sensorOutside sensor
LEK
LEK
LEK
Current sensorEarth cabling (4 pcs)
LOCATION
The kit of supplied items is placed on top of the product.
Removing the covers
FRONT COVER
4
1
2
3
LEK
LEK
1. Remove the upper panel by pulling it straight out.
2. Remove the screws from the lower edge of the
front panel.
3. Lift the panel out at the bottom edge and up.
4. Pull the panel 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
insulation
Parts of the insulation can be removed to facilitate the
installation.
Grip the handle and pull straight out as illustrated.
LEK / APH
13Chapter 2 | Delivery and handlingNIBE F470

General
LEK
LEK
LEK / APH
AA1
FC1
BT7
BT2
EB1
XL4 XL3 XL1
RF3
AA2
BT6
AA3
SF1
UB2
UB1
W130
GP1XL2
QM20
BP5
WP3
FL1
FL2
QM13
QM11
WP1WP2
WM2
WM1
CM1
QM10
AA4
RA2
BT18
BT19
XL8BT3 QN11
QM32
QM31FQ1
AA4-XF3
AA4-XF4
MA1
RN1
PZ1
PZ3
BT30
FQ10
NIBE F470Chapter 3 | The heat pump design14
3 The heat pump design

PIPE CONNECTIONS
Connection, heating medium flow lineXL1
Connection, heating medium return lineXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, docking inXL8
HVAC COMPONENTS
Expansion vesselCM1
Safety valve, water heaterFL1
Safety valve, climate systemFL2
Mixer valve, hot waterFQ1
Circulation pumpGP1
Filler valve, hot water heaterQM10
Filler valve, climate systemQM11
Filler valve 2, climate systemQM13
Venting, heating mediumQM20
Shut-off valve, heating medium flowQM31
Shut off valve, heating medium returnQM32
Shunt valveQN11
Trim valveRN1
Overflow cupWM1
Overflow water dischargeWM2
Overflow pipe, safety valve hot water heaterWP1
Overflow pipe, safety valve climate systemWP2
Overflow pipe, condensationWP3
SENSORS ETC.
Pressure gauge, heating systemBP5
Outside sensor1 BT1
Temperature sensors, heating medium flowBT2
Temperature sensors, heating medium returnBT3
Temperature sensor, hot water, controlBT6
Temperature sensor, hot water, displayBT7
Temperature sensor, compressor operationBT18
Temperature sensor, immersion heater operationBT19
Thermostat, backup heatingBT30
Room sensor1 BT50
ELECTRICAL COMPONENTS
Immersion heater cardAA1
Base cardAA2
Input circuit boardAA3
Display unit
AA4-XF3 USB socket
AA4-XF4 Service socket
AA4
Immersion heaterEB1
Miniature circuit-breakerFC1
Temperature limiterFQ10
Shunt motor with hand wheelMA1
ChokeRA2
EMC cardRF3
SwitchSF1
Network cable for NIBE UplinkTM W130
MISCELLANEOUS
Rating platePZ1
Serial number platePZ3
Cable glandUB1-2
1Not visible in the image
Designations in component locations according to standard IEC 81346-
2.
15Chapter 3 | The heat pump designNIBE F470

Air treatment unit and
compressor module
LEK
LEK
LEK / APH
BP2
CA1
AA100
GQ3
GQ10
XL33
HZ1
QN1
GQ2
BT20
QQ1
BT22 BT21
EP1
QQ2
BP1
AA101
AA102
QM21
XL32
EP13
XL34 XL31
PIPE CONNECTIONS
Ventilation connection, exhaust airXL31
Ventilation connection, extract airXL32
Ventilation connection, supply airXL33
Ventilation connection, outdoor airXL34
HVAC COMPONENTS
Supply air batteryEP13
Venting, supply air coilQM21
SENSORS ETC.
High pressure pressostatBP1
Low pressure pressostatBP2
Temperature sensor, evaporator1 BT16
Temperature sensor, exhaust airBT20
Temperature sensor, extract airBT21
Temperature sensor, supply airBT22
ELECTRICAL COMPONENTS
Connection card air treatment section, exhaust airAA100
Connection card air treatment section, supply airAA101
Connection card compressor cardAA102
CapacitorCA1
COOLING COMPONENTS
EvaporatorEP1
CompressorGQ10
Drying filter with tank (placed on the rear of the
machine)
HZ1
Expansion valve (placed on the rear of the machine)QN1
VENTILATION
Exhaust air fanGQ2
Supply air fanGQ3
Exhaust air filter1 HQ10
Supply air filter1 HQ11
Filter cover, exhaust airQQ1
Filter cover, supply airQQ2
1Not visible in the image
Designations in component locations according to standard IEC 81346-
2.
NIBE F470Chapter 3 | The heat pump design16

General pipe
connections
Pipe installation must be carried out in accordance with
current norms and directives.
The system requires the radiator circuit to be designed
for a low temperature heating medium. At the lowest
dimensioned outdoor temperature (DOT) the highest
recommended temperatures are 55 °C on the supply
line and 45 °C on the return line.
Overflow water from the evaporator collection tray and
safety valves passes via a non-pressurised pipe to an
overflow cup, and from there 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.
Caution
Ensure that incoming water is clean. When
using a private well, it may be necessary to
supplement with an extra water filter.
MAX. VOLUME IN THE HEATING SECTION
AND THE CLIMATE SYSTEM
H
The volume of the pressure expan-
sion vessel (CM1) is 10 litres and it
is pre-pressurised as standard to 0.5
bar (5 mvp). As a result, the maxim-
um permitted height “H” between
the expansion vessel and the highest
installed radiator is 5 m, see figure.
If the pre-pressure is not high
enough, it can be increased by
adding air via the valve in the expan-
sion vessel. The expansion vessel’s
pre-pressure must be stated in the inspection document.
Any change in the pre-pressure affects the ability of the
expansion vessel to handle the expansion of the water.
The maximum system volume, excluding the heating
section, is 219 litres at the above pre-pressure.
17Chapter 4 | Pipe and ventilation connectionsNIBE F470
4 Pipe and ventilation
connections

SYSTEM DIAGRAM
F470 consists of a heat pump, water heater, immersion
heater, fans, circulation pump and control system.F470
is connected to the ventilation system and heating me-
dium circuit.
When the exhaust air at room temperature passes
through the evaporator, the refrigerant evaporates be-
cause 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 heating system
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 flowXL1
Connection, heating medium returnXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, dockingXL8
Caution
This is a principle of operation, differences may
occur in the installation in question.
Dimensions and pipe
connections
B
A
C
XL2 XL1 XL4 XL3
WM1 XL8
SETTING OUT DIMENSIONS
Copper
CBAConnection
33541550(mm)XL1 Heating medium supply
385410100(mm)XL2 Heating medium return
215455200(mm)XL3 Cold water
265405180(mm)XL4 Hot water
300290220(mm)XL8 Docking
43520595(mm)WM1 Overflow cup
Stainless
CBAConnection
33542045(mm)XL1 Heating medium supply
38041595(mm)XL2 Heating medium return
215455200(mm)XL3 Cold water
265405180(mm)XL4 Hot water
300290220(mm)XL8 Docking
43520595(mm)WM1 Overflow cup
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
NIBE F470Chapter 4 | Pipe and ventilation connections18

Symbol key
MeaningSymbol
Shut-off valve
Non-return valve
Mixing valve
Shunt / shuttle valve
Safety valve
Temperature sensor
Circulation pump
Particle filter
Radiator system
Domestic hot water
Under floor heating systems
Hot water circulation
Cold and hot water
CONNECTING COLD AND HOT WATER
• The setting for hot water is made in menu 5.1.1 (page
48).
XL4 XL3
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 F470 and
for example radiators, under floor heating/cooling, fan
coils etc.
• 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.
XL2 XL1
19Chapter 4 | Pipe and ventilation connectionsNIBE F470

Supply air battery
The supply air coil is connected in parallel with the radi-
ator circuit and heats the building’s supply air. The water
flow through the supply air coil is set by means of a trim
valve (RN1). The supply air temperature must be approx-
imately the same as the indoor temperature, preferably
a few degrees lower.
TIP
If possible, choose a cold day to adjust the trim
valve.
Installation alternative
F470 can be installed in several different ways, some
of which are shown below.
Further option information is available at nibe.eu and in
the respective assembly instructions for the accessories
used. See page 61 for a list of the accessories that can
be used with F470.
EXTRA HOT WATER HEATERS
The heat pump should be supplemented with an extra
water heater, if a large bath tub or other significant
consumer 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.
HW fromF470
HOT WATER CIRCULATION (VVC)
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. Nor should there be
any hot water pipes containing stationary water. Adjust
the hot water system so that the temperature does not
fall below 50°C at the extremities of the system.
The circulation pump for hot water circulation can be
controlled by F470. The HWC return is connected to a
freestanding water heater.
EXTRA CLIMATE SYSTEM
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.
NIBE F470Chapter 4 | Pipe and ventilation connections20