Nibe F470 User guide

Installer manual
LEK
NIBE F470
Exhaust air heat pump
IHB GB 1722-1
431434

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 39.
How to scroll through menus and make different settings is described on page 41.
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.

Table of Contents
41 Important information
4Safety information
10General
122 Delivery and handling
12Transport
12Assembly
13Supplied components
13Removing the covers
13Removing parts of the insulation
143 The heat pump design
14Component positions
15
164 Pipe and ventilation connections
16General pipe connections
17Dimensions and pipe connections
18Symbol key
18Cold and hot water
18Heating medium side
19Supply air battery
19Installation alternative
20General ventilation connection
20Ventilation flow
20Adjusting ventilation
215 Electrical connections
21General
23Connections
26Settings
28Optional connections
31Connecting accessories
326 Commissioning and adjusting
32Preparations
32Filling and venting
33Start-up and inspection
397 Control - Introduction
39Display unit
40Menu system
438 Control - Menus
43Menu 1 - INDOOR CLIMATE
43Menu 2 - HOT WATER
43Menu 3 - INFO
44Menu 4 - HEAT PUMP
45Menu 5 - SERVICE
509 Service
50Maintenance
50Service actions
5410 Disturbances in comfort
54Info-menu
54Manage alarm
54Troubleshooting
5611 Accessories
5712 Technical data
57Dimensions and setting-out coordinates
58Technical specifications
62Energy labelling
64Electrical circuit diagram
82Item register
87Contact information
3Table of Contents |NIBE F470

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand the hazards involved. Children shall
not play with the appliance. Cleaning
and user maintenance shall not be made
by children without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2017.
Symbols
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 observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
The CE mark is obligatory for most products sold
in the EU, regardless of where they are made.
CE
Classification of enclosure of electro-technical
equipment.
IP21
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.
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 know-
ledge as well as service instructions for gas sys-
tems 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.
NIBE F470Chapter 1 | Important information4
1 Important information

Area checks
Before work is started on systems that
contains 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 con-
trolled 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
instructed which type of work is to be car-
ried out. Avoid carrying out work in en-
closed spaces. The area surrounding the
worksite must be cordoned off. Ensure that
the area is made safe by removing combust-
ible material.
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 ser-
vice technician whether there is a possible
flammable atmosphere or not. Ensure that
the refrigerant detector is suitable for
combustible refrigerant, i.e. does not gen-
erate 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 extinguish-
er 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 com-
bustible 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 ci-
garette smoking, should be kept at a safe
distance from the service work area where
combustible refrigerant can leak out. Be-
fore 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.
Ventilated area
Ensure that the work is carried out out-
doors 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 car-
ried 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 specifica-
tions. Always follow the manufacturer'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 installations that use combustible refri-
gerants.
■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 con-
tains refrigerant.
■All markings of equipment are visible and
clear. Markings, signs and similar that are
not clear must be replaced.
5Chapter 1 | Important informationNIBE F470

■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 containing
refrigerant, 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 com-
ponents 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 operation must continue, an adequate
temporary solution must be implemented.
This must be reported to the equipment
owner, so that all parties have been in-
formed.
The following checks must be carried out
at the initial safety checks.
■That the capacitors are discharged. Dis-
charging 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 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 re-
moved. If it is absolutely necessary to have
an electricity supply to the equipment
during the service, continuously activated
leak tracing must be performed at the most
critical points in order to warn of any dan-
gerous 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, incorrect 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
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.
Wiring
Check that cabling will not be subject to
wear, corrosion, excessive pressure, vibra-
tion, sharp edges or any other adverse en-
vironmental 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.
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 tra-
cing equipment must be calibrated in an
area completely free from refrigerant). The
leak tracer must not be a potential source
of ignition and must be suitable for the
NIBE F470Chapter 1 | Important information6

relevant refrigerant. The leak tracing
equipment must be set and calibrated for
the relevant refrigerant, to ensure that the
gas concentration is a maximum of 25%
of the lowest combustible concentration
(Lower Flammability Limit, LFL) of the relev-
ant refrigerant.
Leak detection fluids are suitable for use
with most refrigerants but the use of deter-
gents containing chlorine shall be avoided
as the chlorine may react with the refriger-
ant 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
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 system both before and during
the brazing 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 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.
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 fi-
nally pumping to vacuum. Repeat the pro-
cess until no refrigerant remains in the
system. After the final 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 per-
formed 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 pro-
cedures, 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 groun-
ded before the system is filled with refri-
gerant.
■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
system. Perform an additional leak test
before leaving the installation.
Decommissioning
Before performing this procedure, the
technician must be familiar with the
equipment and all its component parts.
7Chapter 1 | Important informationNIBE F470

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 col-
lected 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 equip-
ment is available and used correctly
■the collection process is continuously
supervised by an authorised person
■the collection equipment and contain-
ers 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 refri-
gerant 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
according to the manufacturer's instruc-
tions.
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 equip-
ment and remove and containers and
equipment from the installation imme-
diately.
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 combustible 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 refri-
gerant (especially designed for the collec-
tion of refrigerant). The containers must
have the correctly functioning relief valves
and shut-off valves. Empty collection con-
tainers must be drained and, if possible,
chilled before collection.
The collection equipment must function
correctly and instructions for the equip-
ment 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.
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
NIBE F470Chapter 1 | Important information8

maintained, and that corresponding elec-
trical 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
container 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
before being returned to the supplier. Only
electrical heating of the compressor hous-
ing may be used to quicken draining. Drain
oil from the system in a safe manner.
Miscellaneous
Maximum amount of refrigerant: See
Technical specifications.
■Everyone who works with or opens a re-
frigerant circuit must have a current, valid
certificate from an accredited industry is-
suing 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 accord-
ing to the equipment manufacturer's re-
commendations.
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 com-
bustible refrigerants.
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

General
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 legis-
lation.
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 20)
Setting ventilation flow exhaust air
Setting ventilation flow supply air
Connecting ground cables
Heating medium (page 18)
System flushed
System vented
Safety valve
Circulation pump setting
Setting heating medium flow
Boiler pressure
Setting trim valve, number of turns from
closed position
Electricity (page 21)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor (only copper version)
Safety breaker
Earth circuit-breaker
11Chapter 1 | Important informationNIBE F470

Transport
F470 should be transported and stored vertically in a dry
place. However, the F470 may 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 installa-
tion.
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

Component positions
LEK
LEK
LEK
LEK
LEK / APH
LEK / APH
PBD sv
BP5
QM20
GP1
XL3
FL2
FL1CM1QM31XL1XL4XL2 QM32WM1
QN11 MA1QM11 FL6
EB1
FA1
AA1
FD1
PF3
PF1
AA3
AA2
UB1
UB2
AA4
SF1
W130
UR1GQ10EB1 GQ2
EB10QN1 CA1 HZ1
XL32 XL31
QM10
WM2
LEK
LEK
LEK
LEK
UR2 QM21
BT20
AA4
SF1
AA4-XJ3 AA3
AA2
FA1
BP5
CM1
QN11
MA1
WM1
WP1
AA1
BT30
FD1
EB1
BT18
BT19
QM20
BT2
FL1
QM31FQ1 WP2XL2QM32
QM11
WP3 XL8
XL4
FL2
BT3
BT7
WM2
UB2
UB1
GQ2
UR1
GQ10
CA1
GQ3
HQ11 HQ10
BP1
BP2
BT21 XL32
XL33
BT22
EP13
EP1
XL31
HZ1
QN1
QM10
RN1 XL3
GP1
XL34
RA2
AA100
AA101
AA102
BT6
RF3
PF1
PF3
W130
AA4-XJ4
QM13
XL1
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
Ventilation connection, exhaust airXL31
Ventilation connection, extract airXL32
Ventilation connection, supply airXL33
Ventilation connection, outdoor airXL34
HVAC components
Expansion vesselCM1
Supply air batteryEP13
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
Venting, supply air coil1 QM21
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.
Flow sensor (located on the rear of the machine)3 BF1
High pressure pressostatBP1
Low pressure pressostatBP2
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, evaporator1 BT16
Temperature sensor, compressor operationBT18
Temperature sensor, immersion heater operationBT19
Temperature sensor, exhaust airBT20
Temperature sensor, extract airBT21
Temperature sensor, supply airBT22
Thermostat, backup heatingBT30
Room sensor1 BT50
Electrical components
Immersion heater cardAA1
Base cardAA2
Input circuit boardAA3
Display unitAA4
AA4-XJ3 USB socket
AA4-XJ4 Service socket
Connection card air treatment section, exhaust
air
AA100
Connection card air treatment section, supply airAA101
Connection card compressor cardAA102
CapacitorCA1
Immersion heaterEB1
Miniature circuit-breakerFA1
Miniature circuit-breakerFA2
Temperature limiterFD1
Shunt motor with hand wheelMA1
EMC-filterRF3
SwitchSF1
Network cable for NIBE UplinkTM W130
Cooling components
EvaporatorEP1
CompressorGQ10
Drying filter with tank1 HZ1
Expansion valve1 QN1
Ventilation
Exhaust air fanGQ2
Supply air fanGQ3
Exhaust air filter1 HQ10
Supply air filter1 HQ11
Filter cover, exhaust airUR1
Filter cover, supply airUR2
Miscellaneous
Rating platePF1
Serial number platePF3
Cable glandUB1-2
1Not visible in the image
Designations in component locations according to standard IEC
81346-1 and 81346-2.
15Chapter 3 | The heat pump designNIBE F470

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 wa-
ter 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 before
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 supple-
ment with an extra water filter.
Maximum boiler and radiator volumes
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 vessel and the highest radiator
is 5 m, 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 expansion vessel.
The initial pressure of the expansion
vessel must be stated in the inspec-
tion 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
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 an outline diagram, differences may occur
in the actual installation.
NIBE F470Chapter 4 | Pipe and ventilation connections16
4 Pipe and ventilation connections

Dimensions and pipe
connections
B
A
C
XL2 XL1 XL4 XL3
WM1 XL8
Setting out dimensions
Copper
CBAConnection
33541550(mm)XL1 Heating medium sup-
ply
385410100(mm)XL2 Heating medium re-
turn
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 sup-
ply
38041595(mm)XL2 Heating medium re-
turn
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
15(mm)XL5 Hot water circulation ext. Ø
22(mm)XL8 Docking ext. Ø
32(mm)WM2 Overflow water discharge
17Chapter 4 | Pipe and ventilation connectionsNIBE F470

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
46).
XL4 XL3
Heating medium side
Connecting the climate system
A climate system is a system that regulates indoor com-
fort with the help of the control system in 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
NIBE F470Chapter 4 | Pipe and ventilation connections18

Supply air battery
The supply air coil is connected in parallel with the radi-
ator circuit and heats the house’s supply air. The water
flow through the supply air battery is set by means of a
trim valve (RN1). The supply air temperature must be
approximately 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 www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 56 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 the heat pump. The HWC return can be
connected to a freestanding water heater.
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 connec-
tion.
19Chapter 4 | Pipe and ventilation connectionsNIBE F470

General ventilation connection
Ventilation installation must be carried out in accordance
with current norms and directives.
To prevent fan noise being transferred to the ventilation
devices, install silencers in the ducts.
Connections must be made via flexible hoses, which
should be installed so that they are easy to replace. The
extract air and outdoor air ducts are insulated using dif-
fusion-proof material (PE30) along their entire lengths.
Ensure that the condensation insulation is fully sealed
at any joints and/or at lead-in nipples, silencers, roof
cowls or similar. Provision 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 creases,
tight bends, etc., since this will reduce the ventilation
capacity. The 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 refriger-
ant propane (R290), the air ducting system must be
earthed. This is achieved by making a good electrical
connection to the four ventilation ducts using the en-
closed earth cables (4 pcs). The cables must then be
connected to the earth pins on top of the top cover.
Exhaust air duct /kitchen fan
Exhaust air duct (kitchen fan) must not be connected to
F470.
To prevent food vapour being transferred to F470 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 in-
stallations.
Always use a kitchen fan when cooking.
NOTE
A duct in a masonry chimney stack must not be
used for extract air.
120
60
600
200
200
550
300
560 440
2075
25-50
600
615
35
195
155
Ø125
440
60
430
Undvik rördragning
inom markerat område
Extract air
Exhaust air
Supply air
Outdoor
air
Ventilation flow
Connect F470 so that all of the exhaust air, except kit-
chen duct air (kitchen fan), passes the evaporator (EP1)
in the heat pump. The lowest ventilation flow must
comply with the applicable national standards. For op-
timum heat pump performance, the ventilation flow
should not be less than 28 l/s (100 m³/h) at an exhaust
air temperature of at least 20°C. When the exhaust air
temperature is lower than 20°C (for example at start-up
and when there is nobody at home), the minimum value
is 31 l/s (110 m³/h). The supply air flow must be lower
than the exhaust air flow to prevent over pressure in the
house.
The heat pump’s installation area must be ventilated to
at least 5 l/s (18 m³/h)
Ensure that the ventilation openings are not blocked.
Set the ventilation capacity in the heat pump's menu
system (menu 5.1.5).
(menu 5.1.5)
If the exhaust air temperature falls below 16 °C, the
compressor is blocked and electric additional heat is
permitted. Heat is not recovered from the exhaust air
when the compressor is blocked.
Adjusting ventilation
To obtain the necessary air exchange in every room of
the house, the exhaust air device and the supply air
device must be correctly positioned and adjusted and
the fans in the heat pump adjusted.
Immediately after installation adjust the ventilation so
that it is set according to the projected value of the
house.
Incorrect ventilation adjustment may lead to reduced
installation efficiency and thus poorer operating eco-
nomy, and may result in moisture damage to the house.
NIBE F470Chapter 4 | Pipe and ventilation connections20