Nibe F730 User guide

Installer manual
LEK
NIBE™ F730
Exhaust air heat pump
IHB GB 1617-1
M12000

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 32.
How to scroll through menus and make different settings is described on page 34.
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.
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.
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 48 for instructions.

Table of Contents
41 Important information
4Safety information
4General
82 Delivery and handling
8Transport
8Assembly
9Supplied components
9Removing the covers
10Removing parts of the insulation
113 The heat pump design
134 Pipe and ventilation connections
13General pipe connections
14Dimensions and pipe connections
15Symbol key
15Cold and hot water
15Heating medium side
16Installation alternative
18General ventilation connection
18Ventilation flow
18Adjusting ventilation
195 Electrical connections
19General
21Connections
23Settings
24Optional connections
27Connecting accessories
286 Commissioning and adjusting
28Preparations
28Filling and venting
29Start-up and inspection
31Basic values for the curve setting
327 Control - Introduction
32Display unit
33Menu system
368 Control - Menus
36Menu 1 - INDOOR CLIMATE
36Menu 2 - HOT WATER
36Menu 3 - INFO
37Menu 4 - HEAT PUMP
38Menu 5 - SERVICE
449 Service
44Maintenance
44Service actions
4810 Disturbances in comfort
48Info-menu
48Manage alarm
48Troubleshooting
5011 Accessories
5212 Technical data
52Dimensions and setting-out coordinates
54Technical specifications
56Electrical circuit diagram
62Index
3Table of Contents |NIBE™ F730

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 2016.
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
F730 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.
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
Always give the product's serial number (14
digits) when contacting your installer.
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
legislation.
NIBE™ F730Chapter 1 | Important information4
1 Important information

5Chapter 1 | Important information
Countryspecificinformation
Installermanual
This installer manual must be left with the customer.
NIBE™F730

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 18)
Setting ventilation flow exhaust air
Heating medium (page 15)
System flushed
System vented
Safety valve
Boiler pressure
Mixing valve
Safety valve
Electricity (page 19)
Connections
Main voltage
Phase voltage
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor
Safety breaker
Earth circuit-breaker
Miscellaneous
Guarantee submitted
Warranty
NIBE™ F730Chapter 1 | Important information6

Contact information
KNV Energietechnik GmbH, Gahberggasse 11, 4861 Schörfling
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.knv.at
AT
NIBE Wärmetechnik c/o ait Schweiz AG, Industriepark, CH-6246 Altishofen
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.ch
CH
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad Jizerou
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.cz
CZ
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 Celle
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.de
DE
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 Videbæk
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.volundvt.dk
DK
NIBE Energy Systems OY, Juurakkotie 3, 01510 Vantaa
Puh: 09-274 697 0 Fax: [phone] E-mail: inf[email protected] www.nibe.fi
FI
NIBE Energy Systems France Sarl, Zone industrielle RD 28, Rue du Pou du Ciel, 01600 Reyrieux
Tel : [phone] Fax : [phone] E-mail: inf[email protected] www.nibe.fr
FR
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, Chesterfield S41 9QG
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.co.uk
GB
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP Oosterhout
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibenl.nl
NL
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 Oslo
Tel. sentralbord: [phone] E-mail: [email protected] www.nibeenergysystems.no
NO
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOK
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.biawar.com.pl
PL
© "EVAN" 17, per. Boynovskiy, Nizhny Novgorod
Tel./fax [phone] E-mail: [email protected] www.nibe-evan.ru
RU
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 Markaryd
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.se
SE
For countries not mention in this list, please contact Nibe Sweden or check www.nibe.eu for more information.
7Chapter 1 | Important informationNIBE™ F730

Transport
F730 should be transported and stored vertically in a
dry place. However. the F730 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 F730 on a solid foundation that tolerates
water and the weight of the heat pump. Use the
product's adjustable feet to obtain a horizontal and
stable set-up.
30 - 50 mm
30 - 50 mm
15 - 40 mm
■Because water comes from F730, the area where the
heating pump is located must be equipped with floor
drainage.
■Install with its back to an outside wall, ideally in a
room where noise does not matter, in order to 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 installation area should always have
a temperature of at least 10 °C and max 30 °C.
Installation area
Leave free space of 800 mm in front of the product.
Approx. 50 mm free space is required on each side (see
image) in order to remove the side panels. The panels
do not need to be removed during service. All service
on F730 can be carried out from the front. Leave space
between the heat pump and the wall behind (and any
routing of supply cables and pipes), to reduce the risk
of transmission of any vibrations.
(50)* (50)*
800
* 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™ F730Chapter 2 | Delivery and handling8
2 Delivery and handling

Supplied components
Room sensorOutside sensor
LEK
Extra air filterVent hose
(length 4 m)
LEK
LEK
LEK
Venting connectorCurrent sensor
Location
The kit of supplied items is placed on top of the
product.
Removing the covers
Front cover
LEK
LEK
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.
9Chapter 2 | Delivery and handlingNIBE™ F730

Removing parts of the
insulation
Parts of the insulation can be removed to facilitate the
installation.
Insulation, top
1. Disconnect the cable from the motor and remove
the motor from the shuttle valve as illustrated.
LEK
LEK
LEK
LEK
A
B
2. Grip the handle and pull straight out as illustrated.
LEK
LEK
Insulation, immersion heater
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician. Electrical installation and wiring
must be carried out in accordance with the
stipulations in force.
1. Remove the cover for the junction box according
to the description on page 20.
2. Grip the handle and pull the insulation carefully
towards you as illustrated.
LEK
1
LEK
2
TIP
Remove the hatch for the immersion heater
card so that it is easier to remove the insulation
(see page 20).
NIBE™ F730Chapter 2 | Delivery and handling10

LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
BP2
QN10
AA1
FA1
BT21BT3
BT7
BT2
QM24GQ2GQ10BT14BP1
PF1
PF3
EB1
AA101
BT30
FD1
XL4 XL3
XL1 RF3
AA2
BT6
AA23
AA3
AA4-XJ3
AA4-XJ4
SF1
AA4
UB2
UB1
BT16
EP1
QN1
BT17
BS1
BT20
UR1
W130
CA1
QA40
RA1
XL31
XL32
GP1
XL2
QM22QM26 QM20CM1 XL10
BP5
WP3
FL1
EB16
FD3
HZ2 BT15 BT12 EP2
QZ2
FL2QM13
QM11
WP1
WP2
WM2
WM1
11Chapter 3 | The heat pump designNIBE™ F730
3 The heat pump design

Pipe connections
Connection, heating medium flow lineXL1
Connection, heating medium return lineXL2
Connection, cold waterXL3
Connection, hot waterXL4
Connection, draining heating mediumXL10
Ventilation connection, exhaust airXL31
Ventilation connection, extract airXL32
HVAC components
Expansion vesselCM1
Safety valve, water heaterFL1
Safety valve, climate systemFL2
Circulation pumpGP1
Filler valve, climate systemQM11
Venting, heating mediumQM20
Venting, coilQM22
Venting, heat exchangerQM24
Venting, heating medium 2QM26
Shuttle valve, climate system/water heaterQN10
Shut off valve with filterQZ2
Overflow water containerWM1
Overflow water dischargeWM2
Overflow pipe, safety valve hot water heaterWP1
Overflow pipe, safety valve climate systemWP2
Overflow pipe, condensationWP3
Sensors etc.
High pressure pressostatBP1
Low pressure pressostatBP2
Pressure gauge, heating systemBP5
Air speed sensorBS1
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, heating medium flow after
condenser
BT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, evaporator1 BT16
Temperature sensor, suction gasBT17
Temperature sensor, exhaust airBT20
Temperature sensor, extract airBT21
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
Communication boardAA23
Connection card sensorAA101
CapacitorCA1
Immersion heaterEB1
Defrosting elementEB16
Miniature circuit-breakerFA1
Temperature limiterFD1
Temperature limiter, defrosting elementFD3
InverterQA40
ChokeRA1
EMC cardRF3
SwitchSF1
Network cable for NIBE UplinkTM W130
Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10
Drying filterHZ2
Expansion valveQN1
Ventilation
Exhaust air fanGQ2
Exhaust air filter1 HQ10
Filter cover, exhaust airUR1
Miscellaneous
Rating platePF1
Serial number platePF3
Cable glandUB1
Cable glandUB2
1Not visible in the image
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE™ F730Chapter 3 | The heat pump design12

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 goes via overflow cup 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 pre-pressurised as standard to
0.5 bar (5 mvp). As a result, the
maximum 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 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
285 litres at the above pre-pressure.
System diagram
F730 consists of heat pump, water heater, immersion
heater, fan, circulation pump as well as control sys-
tem.F730 is connected to the ventilation system and
heating medium circuit.
When the room temperature exhaust air, and in certain
cases outdoor air, 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.
XL2 XL1XL3XL4
Extract air Exhaust air
FrånluftAvluft FrånluftAvluft
Connection, heating medium flowXL1
Connection, heating medium returnXL2
Connection, cold waterXL3
Connection, hot waterXL4
Caution
This is an outline diagram, differences may
occur in the actual installation.
13Chapter 4 | Pipe and ventilation connectionsNIBE™ F730
4 Pipe and ventilation connections

Dimensions and pipe
connections
B
C
A
F730
LEK
XL10 XL2 XL4 XL3 XL1 WM1
The overflow cup (WM1) can be turned, so that the
pipe can be directed forwards or backwards to simplify
connection of the hose to the drain.
Setting out dimensions
CBAConnection
105285150(mm)XL1 Heating medium
supply
365285220(mm)XL2 Heating medium re-
turn
195445255(mm)XL3 Cold water
260405280(mm)XL4 Hot water
50280200(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
32(mm)WM2 Overflow water discharge
NIBE™ F730Chapter 4 | Pipe and ventilation connections14

Symbol key
MeaningSymbol
Shut-off valve
Non-return valve
Mixing valve
Shunt / shuttle valve
Safety valve
Temperature sensor
Circulation pump
Radiator system
Domestic hot water
Under floor heating systems
Cold and hot water
Connecting cold and hot water
■Mixing valve must be installed if the factory setting
is changed so that the temperature can exceed 60 °C.
■The setting for hot water is made in menu 5.1.1 (page
39).
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 F730
and for example radiators, underfloor heating/cooling,
fan convectors etc.
■When connecting to a system with thermostats on
all radiators, either a bypass valve must be fitted or
some of the thermostats must be removed to ensure
sufficient flow.
XL2 XL1
15Chapter 4 | Pipe and ventilation connectionsNIBE™ F730

Installation alternative
F730 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 50 for a list of the accessories
that can be used with F730.
More information about the options is available at
www.nibe.eu.
Separated/one unit
F730 is delivered as one unit and can be installed as
one unit or separated. For separate installation the ac-
cessory DKI 10 is required.
The images in this manual show F730 installed as one
unit.
LEK
Separated installationOne unit
Extra hot water heaters
The heat pump should be supplemented with an extra
water heater, if a hot tub or other significant consumer
of hot water is installed.
Water heater without immersion heater
For new builds use water heater type NIBE VPB 200 or
VPBS 300 or AHPS (prepared for solar docking).
kv
vv
cw
hw
NIBE™ F730Chapter 4 | Pipe and ventilation connections16

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 fromF730
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.
17Chapter 4 | Pipe and ventilation connectionsNIBE™ F730

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
should 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 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. The ventilation ducts should
be installed in such a way that it is easy to open the
inverter box. The extract air duct should, if possible, be
routed up through the roof. If the duct is to be routed
out through an external wall, avoid having a 90 degree
bend backward, as this can cause noise and poorer
capacity.
NOTE
F730 has a very low extract air temperature.
To avoid damaging the product and/or the
building, it is therefore important that the ex-
tract air ducts are insulated with diffusion-
proof material (PE30) along their entire length.
TIP
If additional condensation insulation (PE30)
dimension Ø 200 is installed on the outside of
the existing exhaust line between the heat
pump and the inner roof, the noise in the in-
stallation area is reduced by 1-2 dB(A).
Exhaust air duct /kitchen fan
Exhaust air duct (kitchen fan) must not be connected
to F730.
To prevent food vapour being transferred to F730 the
distance between the kitchen fan and the exhaust air
device must be considered. The distance should not be
less than 1.5 m.
Always use a kitchen fan when cooking.
NOTE
A duct in a masonry chimney stack must not
be used for extract air.
120
40
600
615
200
60
110
35
2075
440
25-50
370
350
440
180
LEK
Extract air Exhaust air
Ventilation flow
Connect F730 so that all exhaust air, except exhaust
air duct air (kitchen fan), passes the evaporator (EP1)
in the heat pump. The lowest ventilation flow must
comply with the applicable national standards. For
optimum heat pump performance, the ventilation flow
should not be less than 21 l/s (75 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 no one at home) the minimum
value is31 l/s (110 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).
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™ F730Chapter 4 | Pipe and ventilation connections18

General
All electrical equipment, except the outdoor sensors,
room sensors and the current sensors are ready connec-
ted at the factory.
■Disconnect the heat pump before insulation testing
the house wiring.
■If the building is equipped with an earth-fault
breaker, F730 should be equipped with a separate
one.
■If a miniature circuit breaker is used, this should have
at least motor characteristic “C”. See page 54 for fuse
size.
■For the heat pump wiring diagram, see page 56.
■Communication and sensor cables to external con-
nections must not be laid close to high current cables.
■The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX or LiYY or equivalent.
■When cable routing in F730, cable grommets UB1and
UB2, (marked in image) must be used. In UB1 and
UB2 the cables are inserted through the heat pump
from the back to the front. For dimensions diagram
see page 21.
LEK
LEK
UB1
UB2
NOTE
Switch (SF1) must not be moved to "" or " "
until F730 has been filled with water. Other-
wise the temperature limiter, thermostat and
the immersion heater may be damaged.
NOTE
Check the connections, main voltage and
phase voltage before the machine is started,
to prevent damage to the heat pump electron-
ics.
NOTE
If the supply cable is damaged, only NIBE, its
service representative or similar authorised
person may replace it to prevent any danger
and damage.
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician. Cut the current with the circuit
breaker before carrying out any servicing.
Electrical installation and wiring must be car-
ried out in accordance with the stipulations in
force.
FD1
FD3
FD1-S2
FA1
Miniature circuit breaker (FA1)
Operation (230V), fan, circulation pumps etc. are intern-
ally fused by a miniature circuit breaker (FA1).
Caution
Check the miniature circuit-breaker (FA1). It
may have tripped during transportation.
Temperature limiter (FD1)
The temperature limiter (FD1) cuts the current supply
to the electric additional heat if the temperature rises
between 90 and 100°C and can be manually reset.
Resetting
The temperature limiter (FD1) is accessible behind the
front cover. Reset the temperature limiter by carefully
pressing the button (FD1-SF2) using a small screwdriver.
Temperature limiter, defrosting element
(FD3)
The temperature limiter for the defrosting element
(FD3) cuts the current supply to the defrosting element
if the temperature rises above 75 °C and is manually
reset.
Resetting
The temperature limiter for the defrosting element
(FD3) is accessible behind the air treatment cover. Re-
move the cover and then the panel secured with
screws. Reset the temperature limiter by carefully
pressing the button (FD3-SF2) using a small screwdriver.
19Chapter 5 | Electrical connectionsNIBE™ F730
5 Electrical connections

Accessibility, electrical connection
The plastic cap of the electrical boxes is opened using
a screwdriver.
NOTE
The cover for the input card is opened without
a tool.
Removing the cover, input board
1
2
1. Push the catch down.
2. Angle out the cover and remove it.
Removing the cover, immersion heater board
1
2
A
B
1. Insert the screwdriver (A) and pry the catch care-
fully downwards (B).
2. Angle out the cover and remove it.
Removing the cover, base circuit board
Caution
To remove the cover for the base board, the
cover for the input circuit board must first be
removed.
1
A
B
2
1. Insert the screwdriver (A) and pry the catch care-
fully downwards (B).
2. Angle out the cover and remove it.
Cable lock
Use a suitable tool to release/lock cables in the heat
pump terminal blocks.
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
1
2
NIBE™ F730Chapter 5 | Electrical connections20