Nibe F750 User guide
Installer manual
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NIBE™ F750
Exhaust air heat pump
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A detailed explanation of the button functions can be found on page 34.
How to scroll through menus and make different settings is described on page 36.
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The mode for setting the indoor temperature is reached, when in the start mode in the main menu, by pressing the
OK button twice. Read more about the settings on page 38.
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;
To temporarily increase the amount of hot water, first turn the control knob to mark menu 2 (water droplet) and then
press the OK button twice. Read more about the settings on page 44.
In event of disturbances in comfort
If a disturbance in comfort of any type occurs there are some measures that can be taken before you need to contact
your installer. See page 60 for instructions.
Table of Contents
1 Important information 2
Safety information 2
2 Delivery and handling 6
Transport 6
Assembly 6
Supplied components 7
Removing the covers 8
Removing parts of the insulation 8
3 The heat pump design 10
4 Pipe and ventilation connec-
tions 15
General pipe connections 15
Dimensions and pipe connections 16
Symbol key 17
Cold and hot water 17
Heating medium side 17
Installation alternative 18
General ventilation connection 20
Ventilation flow 20
Adjusting ventilation 20
5 Electrical connections 21
General 21
Connections 23
Settings 25
Optional connections 27
Connecting accessories 29
6 Commissioning and adjusting 30
Preparations 30
Filling and venting 30
Start-up and inspection 31
7 Control - Introduction 34
Display unit 34
Menu system 35
8 Control - Menus 38
Menu 1 - INDOOR CLIMATE 38
Menu 2 - HOT WATER 44
Menu 3 - INFO 46
Menu 4 - HEAT PUMP 47
Menu 5 - SERVICE 52
9 Service 56
Service actions 56
10 Disturbances in comfort 60
Info-menu 60
Manage alarm 60
Troubleshooting 60
11 Accessories 62
12 Technical data 63
Dimensions and setting-out coordinates 63
Technical specifications 64
Electrical circuit diagram 66
Item register 72
1Table of Contents |NIBE™ F750
Safety information
This manual describes installation and service procedures
for implementation by specialists.
This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capab-
ilities or lack of experience and knowledge
if they have been given supervision or in-
struction 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 su-
pervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2013.
Symbols
NOTE
This symbol indicates danger to machine or
person.
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
F750 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 relev-
ant EU directives. The CE mark is obligatory for most
products sold in the EU, regardless where they are made.
IP21 means that the product can be touched by hand,
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.
NIBE™ F750Chapter 1 | Important information2
1 Important information
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1).
6HULDO QXPEHU
Caution
Always give the product's serial number (14 di-
gits) when reporting a fault.
Country specific information
Installer manual
This installer manual must be left with the customer.
3Chapter 1 | Important informationNIBE™ F750
Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must be
carried out by a suitably qualified person. Fill in the page for information about installation data in the User manual.
DateSignatureNotesDescription
✔
Ventilation (page 20)
Setting the ventilation flow
Heating medium (page 17)
System flushed
System vented
Circulation pump setting
Setting heating medium flow
Boiler pressure
Hot water
Mixing valve
Electricity (page 21)
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor (does not apply to enamel)
Safety breaker
Earth circuit-breaker
NIBE™ F750Chapter 1 | Important information4
Contact information
KNV Energietechnik GmbH, Gahberggasse 11, 4861 SchörflingAT
Tel: +43 (0)7662 8963-0 Fax: +43 (0)7662 8963-44
NIBE Wärmetechnik AG, Winterthurerstrasse 710, CH-8247 FlurlingenCH
Tel: (52) 647 00 30 Fax: (52) 647 00 31
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad JizerouCZ
Tel: +420 326 373 801 Fax: +420 326 373 803
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 CelleDE
Tel: 05141/7546-0 Fax: 05141/7546-99
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 VidebækDK
Tel: 97 17 20 33 Fax: 97 17 29 33
NIBE Energy Systems OY, Juurakkotie 3, 01510 VantaaFI
Puh: 09-274 697 0 Fax: 09-274 697 40
AIT France, 10 rue des Moines, 67000 HaguenauFR
Tel : 03 88 06 24 10 Fax : 03 88 06 90 15
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, Chesterfield S41 9QGGB
Tel: 0845 095 1200 Fax: 0845 095 1201
NIBE Energietechniek B.V., Postbus 2, NL-4797 ZG WILLEMSTAD (NB)NL
Tel: 0168 477722 Fax: 0168 476998
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 OsloNO
Tel. sentralbord: +47 23 17 05 20
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOKPL
Tel: 085 662 84 90 Fax: 085 662 84 14
© "EVAN" 17, per. Boynovskiy, Nizhny NovgorodRU
Tel./fax +7 831 419 57 06
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 MarkarydSE
Tel: +46-(0)433-73 000 Fax: +46-(0)433-73 190
For countries not mention in this list, please contact Nibe Sweden
5Chapter 1 | Important informationNIBE™ F750
Transport
F750 should be transported and stored vertically in a dry
place. The F750 may, however, be carefully laid on its
back when being moved into a building. The centre of
gravity is in the upper part.
R
0
R
0
Assembly
႑Position F750 on a firm base that can take the weight,
preferably on a concrete floor or foundation. Use the
product's adjustable feet to obtain a horizontal and
stable set-up.
30 - 50 mm
႑The area where F750 is located must be equipped
with floor drainage.
႑Install 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.
႑Wherever the unit is located, walls to sound sensitive
rooms should be fitted with sound insulation.
႑Route pipes so they are not fixed to an internal wall
that backs on to a bedroom or living room.
႑The heat pump’s installation area should always have
a temperature of at least 10 °C and max 30 °C.
NIBE™ F750Chapter 2 | Delivery and handling6
2 Delivery and handling
Installation area
Leave a space of 500 mm in front of the product. Approx
50 mm free space is required in order to open the side
hatches. The hatches do not need to be opened during
service, all service on F750 can be carried out from the
front. Leave space between the heat pump and wall be-
hind (and any routing of supply cables and pipes) to re-
duce the risk reproduction of any vibration.
500
(50) (50)
NOTE
Ensure that there is sufficient space (300 mm)
above the heat pump for installing ventilation
hoses.
Supplied components
Room sensorOutside sensor
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Current sensor (not enamel)Vent hose
(length 4 m)
Extra air filter
Location
The kit of supplied items is placed on top of the product.
7Chapter 2 | Delivery and handlingNIBE F750
Removing the covers
Front cover
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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
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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 cover backwards and slightly to the side.
4. Pull the cover to one side.
5. Pull the cover forwards.
Removing parts of the insula-
tion
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.
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A
B
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2. Grip the handle and pull straight out as illustrated.
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APH
NIBE™ F750Chapter 2 | Delivery and handling8
Insulation, immersion heater
NOTE
Electrical installation and service must be carried
out under the supervision of a qualified electri-
cian. 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 22.
2. Grip the handle and pull the insulation carefully to-
wards you as illustrated.
LEK / APH
TIP
Remove the hatch for the immersion heater card
so that it is easier to remove the insulation (see
page 22).
9Chapter 2 | Delivery and handlingNIBE™ F750
F750, copper
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NIBE™ F750Chapter 3 | The heat pump design10
3 The heat pump design
F750, enamel
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11Chapter 3 | The heat pump designNIBE™ F750
F750, stainless steel
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NIBE™ F750Chapter 3 | The heat pump design12
Pipe connections
Connection, heating medium flow lineXL 1
Connection, heating medium return lineXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
Connection, hot water circulationXL 5
Connection, docking inXL 8
Connection, draining heating mediumXL 10
Ventilation connection, exhaust airXL 31
Ventilation connection, extract airXL 32
HVAC components
Expansion vesselCM 1
Safety valve, water heaterFL 1
Safety valve, climate systemFL 2
Vacuum valveFL 6
Mixer valve, hot water3, 4
FQ 1
Circulation pumpGP 1
Heating medium pump2GP 6
Filler valve, hot water heaterQM 10
Filler valve, climate systemQM 11
Filler valve 2, climate system3,4
QM 13
Venting, climate systemQM 20
Venting, coilQM 22
Venting, buffer tankQM 23
Venting, heat exchangerQM 24
Shut-off valve, heating medium flowQM 31
Shuttle valve, climate system/water heaterQN 10
Reversing valve, circulation climate system1
QN 27
Non-return valveRM 1
TundishWM 1
Overflow water dischargeWM 2
Overflow pipe, safety valve hot water heaterWP 1
Overflow pipe, safety valve climate systemWP 2
Condensation lead off, fan boxWP 3
Sensors etc.
High pressure pressostatBP 1
Low pressure pressostatBP 2
Pressure gauge, heating systemBP 5
Air speed sensorBS 1
Outdoor sensor1
BT 1
Temperature sensors, heating medium returnBT 3
Temperature sensor, hot water, controlBT 6
Temperature sensor, hot water, displayBT 7
Temperature sensor, heating medium flow after
condenser
BT 12
Temperature sensor, hot gasBT 14
Temperature sensor, fluid pipeBT 15
Temperature sensor, evaporator1
BT 16
Temperature sensor, suction gasBT 17
Temperature sensor, exhaust airBT 20
Temperature sensor, extract airBT 21
Thermostat, backup heatingBT 30
Room sensor1
BT 50
Temperature sensor, heating medium flow after
buffer vessel
BT 61
Temperature sensor, heating medium return after
buffer vessel
BT 62
Temperature sensor, heating medium supply after
immersion heater
BT 63
Electrical components
Immersion heater cardAA 1
Base cardAA 2
Input circuit boardAA 3
Display unitAA 4
AA4-XJ3 USB socket
AA4-XJ4 Service socket
Sacrificial anode card4
AA 8
Communication boardAA23
Connection card sensorAA101
Immersion heaterEB 1
Miniature circuit-breakerFA 1
Temperature limiterFD 1
InverterQA 40
Choke, inverterRA 1
ChokeRA 2
EMC-filter, inverterRF 2
EMC-filterRF 3
SwitchSF 1
Network cable for NIBE UplinkTM
W130
Terminal fuse, inverterX101
Cooling components
EvaporatorEP 1
CondenserEP 2
CompressorGQ 10
Drying filterHZ 2
Expansion valveQN 1
Ventilation
Exhaust air fanGQ 2
Exhaust air filter1
HQ 10
Filter cover, exhaust airUR 1
Miscellaneous
Rating platePF 1
Serial number platePF 3
Cable glandUB1
Cable glandUB2
1Not visible in the image
3Only heat pumps with stainless steel vessel.
13Chapter 3 | The heat pump designNIBE™ F750
4Only heat pump with enamelled vessel.
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE™ F750Chapter 3 | The heat pump design14
General pipe connections
Pipe installation must be carried out in accordance with
current norms and directives.
The system requires a low-temperature design of the ra-
diator circuit. At lowest dimensioned outdoor temperature
(DUT) the highest recommended temperatures are 55 °C
on the flow line and 45 °C on the return line.
Overflow water from the evaporator collection tray and
safety valves goes via non-pressurised collecting pipes to
a drain so that hot water splashes cannot cause injury.
The entire length of the overflow water pipe must be in-
clined 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.
Maximum boiler and radiator volumes
H
The volume of the pressure expan-
sion vessel (CM1) is 10 litres and it
is pressurised as standard to 0.5 bar
((5 mvp). As a result, the maximum
permitted height "H" between the
vessel and the highest radiator is 5
metres; see figure.
If the standard initial pressure in the
pressure vessel is not high enough
it can be increased by adding air via
the valve in the expansion 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 260
litres at the above pre-pressure.
System diagram
F750 consists of a heat pump, water heater, buffer vessel,
immersion heater, fan, circulation pump and control sys-
tem.F750 is connected to the ventilation system and
heating medium circuits.
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 boiler water,
whereupon the refrigerant changes state from gas to li-
quid.
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.
;/;/;/;/
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
15Chapter 4 | Pipe and ventilation connectionsNIBE™ F750
4 Pipe and ventilation connections
Dimensions and pipe connec-
tions
B
C
A
Copper
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:0;/;/ ;/ ;/
Enamel and stainless steel
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;/ :0;/ ;/;/
Setting out dimensions
CBAConnection, copper
70400170(mm)XL 1 Heating medium
flow
360270165(mm)XL 2 Heating medium re-
turn
280470230(mm)XL 3 Cold water
315410225(mm)XL 4 Hot water
65110160(mm)WM 1 Overflow cup
CBAConnection, enamel
and stainless steel
70400170(mm)XL 1 Heating medium
flow
360270165(mm)XL 2 Heating medium re-
turn
280470230(mm)XL 3 Cold water
315410130(mm)XL 4 Hot water
65110160(mm)WM 1 Overflow cup
Pipe dimensions
Connection
22(mm)Heating medium ext Ø
22(mm)Cold water ext Ø
22(mm)Hot water ext Ø
22(mm)Docking ext Ø
32(mm)Overflow water discharge
Connection
int.G20CM1 Expansion tank (connection) Ø
int.G25XL1 Heating medium, flow line Ø
int.G25XL2 Heating medium, return line Ø
int.G25XL3 Cold water Ø
int.G25XL4 Hot water Ø
int.G25XL8 Docking connection, flow line Ø
int.G25XL9 Docking connection, return line Ø
NIBE™ F750Chapter 4 | Pipe and ventilation connections16
Symbol key
MeaningSymbol
Venting valve
Shut-off valve
Non-return valve
Shunt / shuttle valve
Safety valve
Trim valve
Temperature sensor
Expansion vessel
Pressure gauge
P
Circulation pump
Particle filter
Compressor
Heat exchanger
Cold and hot water
Connecting cold and hot water
A mixing valve must also be installed if the factory setting
for hot water is changed. National regulations must be
observed. The setting is made in menu 5.1.1 (page 52).
Heating medium side
Connecting the climate system
When connecting to a system with thermostats on all
radiators/underfloor heating coils, a relief valve must be
fitted, or a thermostat must be removed to ensure suffi-
cient flow. A filter must be installed on the return line.
17Chapter 4 | Pipe and ventilation connectionsNIBE™ F750
Installation alternative
F750 can be connected in several different ways, some
of which are shown below.
Further option information is available at
and in the respective assembly instructions for the ac-
cessories used. See page 62 for a list of the accessories
that can be used with F750.
Extra hot water heaters
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
If there is a need for an additional hot water heater a
NIBE VPB 200 type heater or VPBS 300 (prepared for
solar docking) are used. The docking kit accessory is
needed. VPB 200 is best placed to the left of F750. VPBS
300 requires pipe routing behind the apparatus, which
requires 60 mm free space to the wall.
kv
vv
FZ
KZ
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 heater is equipped with a valve connector Ø 15 mm
this should be replaced with a corresponding Ø 22 mm.
Kv
Vv från värmepump
Backventil
Blandningsventil
+: IURP )
&:
1RQUHWXUQ YDOYH
+:
0L[LQJ YDOYH
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.
NIBE™ F750Chapter 4 | Pipe and ventilation connections18
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