Nibe F1255 Series User manual

UHB EN 2008-9
231530
USER MANUAL
Ground source heat pump
NIBE F1255

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 13.
How to scroll through menus and make different settings is described on
page 18.
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. Read more about
the settings on page 28.
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. Read
more about the settings on page 45.
In event of disturbances in comfort
If you experience a disturbance in comfort of any kind, there are some
measures you can take yourself before you need to contact your installer.
See page 77 for instructions.

41 Important information
5Safety information
5Symbols
6Marking
6Serial number
8F1255 – An excellent choice
102 The heat pump – the heart of the house
11Heat pump function
12Contact with F1255
23Maintenance of F1255
24Saving tips
273 F1255 – at your service
27Set the indoor climate
44Set the hot water capacity
49Get information
52Adjust the heat pump
764 Disturbances in comfort
76Manage alarm
77Troubleshooting
81Only additional heat
825 Technical data
836 Glossary
89Item register
91Contact information
3Table of ContentsNIBE F1255
Table of Contents

INSTALLATION DATA
F1255Product
Serial number
Installation date
Installer
Type of brine -
Mixing ratio/freezing point
Active drilling depth/collector length
Accessories
✔
SetFact.
sett.
NameNo.
0heating curve (offset)1.9.1.1
7heating curve (curve
slope)
1.9.1.1
Serial number must always be given
Certification that the installation is carried out according to instructions in the accompanying
installer manual and applicable regulations.
_________________________Signed__________________Date
NIBE F1255Chapter 1 | Important information4
1 Important information

Safety information
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 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 supervision.
Rights to make any design or technical modifications
are reserved.
©NIBE 2020.
Do not start F1255 if there is a risk that the water in the
system has frozen.
If the supply cable is damaged, only NIBE, its service
representative or similar authorised person may replace
it to prevent any danger and damage.
Water may drip from the safety valve’s overflow pipe, so
the overflow pipe’s opening must be open. The safety
valves must be actuated regularly to remove dirt and to
check that they are not blocked.
Symbols
WARNING!
This symbol indicates serious danger to person or machine.
NOTE
This symbol indicates danger to person or machine .
5Chapter 1 | Important informationNIBE F1255

Caution
This symbol indicates important information about what you
should observe when maintaining 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, re-
gardless of where they are made.
CE
Classification of enclosure of electro-technical equipment.IP21
Danger to person or machine.
!
Read the User Manual.
Serial number
The serial number can be found at the bottom right of the front cover,
in the info menu (menu 3.1) and on the type plate .
Serial number
NIBE F1255Chapter 1 | Important information6

Caution
You need the product's ((14 digit) serial number for servicing
and support.
7Chapter 1 | Important informationNIBE F1255

F1255 – An excellent choice
F1255 is part of a new generation of heat pumps, which have been intro-
duced to supply your home with inexpensive and environmentally friendly
heating and/or cooling. Heat production is safe and economical with in-
tegrated hot water heater, immersion heater, circulation pump and control
system.
The heat pump can be connected to an optional low temperature heat
distribution system. e.g. radiators, convectors or underfloor heating. It
is also prepared for connection to several different products and accessor-
ies, e.g. extra hot water heater, ventilation recovery, pool, free cooling
and climate systems with different temperatures.
For F1255-6 1x230V or 3x230V a 4.5 kW immersion heater can be con-
nected automatically if anything unforeseen should occur or as back-up
operation (factory setting3.5 kW).
For F1255-12 1x230V an immersion heater of 7 kW can be connected
automatically if anything unforeseen should occur or as back-up operation
(factory setting 6 kW).
For F1255-12 3x230V an immersion heater of 9 kW can be connected
automatically if anything unforeseen should occur or as back-up operation
(factory setting 6 kW).
For F1255-6 3x400V an immersion heater of 6.5 kW can be connected
automatically if anything unforeseen should occur or as back-up operation
(factory setting 3.5 kW).
For F1255-12 & -16 3x400V an immersion heater of 7 kW (switchable to
9 kW) can be connected automatically if anything unforeseen should
occur or as back-up operation (factory 6 kW).
F1255 is equipped with a control computer for good comfort, good
economy and safe operation. Clear information about status, operation
time and all temperatures in the heat pump are shown on the large and
easy to read display. This means, for example, that external unit thermo-
meters are not necessary.
EXCELLENT PROPERTIES FOR F1255:
•Inverter controlled compressor
The heat pump has an inverter-controlled compressor that automatically
adapts itself optimally and economically to your house and supplies
your installation with heating and hot water.
NIBE F1255Chapter 1 | Important information8

•Integrated water heater
There is a water heater integrated in the heat pump, which is insulated
with environmentally friendly cellular plastic for minimal heat loss.
•Scheduling the indoor comfort and hot water
Heating and hot water as well as cooling and ventilation in some cases,
can be scheduled for each day of the week or for longer periods (vaca-
tion).
•Display with user instructions
The heat pump has a large display with easy-to-understand menus that
facilitate setting a comfortable climate.
•Simple troubleshooting
In the event of a fault, the heat pump display shows what happened
and the actions to be taken.
9Chapter 1 | Important informationNIBE F1255

100 ºC
50 ºC40 ºC
-2 ºC
0 ºC-3 ºC
-4 ºC
Heating medium
Brine
Refrigerant
Evaporator
Condenser
Expansion valve
Compressor
1
2
3
Heat source
A
B
C
D
E
G
F
H
The temperatures are only examples and may vary between different installations and
time of year.
NIBE F1255Chapter 2 | The heat pump – the heart of the house10
2 The heat pump – the heart of
the house

Heat pump function
A heat pump can use stored solar energy from rock, ground or water in
order to heat a property. The conversion of stored energy in nature to
property heating occurs in three different circuits. In the brine circuit, (1)
, free heat energy is retrieved from the surroundings and transported to
the heat pump. In the refrigerant circuit, (2) , the heat pump increases
the retrieved heat's low temperature to a high temperature. In the
heating medium circuit, (3) , the heat is distributed around the house.
The temperatures below are only examples and may vary between dif-
ferent installations and times of year.
Brine circuit
In a hose, collector, an anti-freeze liquid, brine, circulates from the heat
pump out to the heat source (rock/ground/lake). The energy from the
heat source is stored by it heating the brine a few degrees, from about
–3°C to about 0 °C.
A
The collector then routes the brine to the heat pump’s evaporator. Here,
the brine releases heat energy and the temperature drops a few degrees.
The liquid then returns to the heat source to retrieve energy again.
B
Refrigerant circuit
Another liquid circulates in a closed system in the heat pump, a refriger-
ant, which also passes the evaporator. The refrigerant has a very low
boiling point. In the evaporator the refrigerant receives the heat energy
from the brine and starts to boil.
C
The gas that is produced during boiling is routed into an electrically
powered compressor. When the gas is compressed, the pressure in-
creases and the gas's temperature increases considerably, from approx.
5ｰC to approx. 100 ｰC.
D
From the compressor, gas is forced into a heat exchanger, condenser,
where it releases heat energy to the heating system in the house,
whereupon the gas is cooled and condenses to a liquid form again.
E
As the pressure is still high, the refrigerant can pass an expansion valve,
where the pressure drops so that the refrigerant returns to its original
temperature. The refrigerant has now completed a full cycle. It is routed
to the evaporator again and the process is repeated.
F
Heat medium circuit
The heating energy that the refrigerant releases in the condenser is re-
trieved by the heat pump's boiler section.
G
11Chapter 2 | The heat pump – the heart of the houseNIBE F1255

The heating medium circulates in a closed system and transports the
heated water's heat energy to the house water heater and radiators/heat-
ing coils.
H
Contact with F1255
EXTERNAL INFORMATION
When the heat pump door is closed, information can be received via an
information window and a status lamp.
Information window
Status lamp
Information window
The information window shows part of the display that is on the display
unit (located behind the door to the heat pump). The information window
can display different type of information, e.g. temperatures, clock, etc.
You determine what is to be displayed in the information window. Your
own combination of information is entered using the display unit. This
information is specific to the information window and disappears when
the heat pump door is opened.
Instructions on how to set the information window can be found on page
69.
Status lamp
The status lamp indicates the status of the heat pump: continuous green
light during normal function, continuous yellow light during activated
emergency mode or continuous red light in the event of a deployed
alarm.
Alarm management is described on page 76.
NIBE F1255Chapter 2 | The heat pump – the heart of the house12

DISPLAY UNIT
A
B
C
D
E
F
Display
Status lamp
OK button
Back button
Control knob
Switch
INDOOR CLIMATE
HEAT PUMP INFO
HOT WATER
F1255 GUSB port
There is a display unit behind the heat pump door, which is used to
communicate with F1255. Here you:
• switch on, switch off or set the heat pump in emergency mode.
• sets the indoor climate and hot water as well as adjusts the heat pump
to your needs.
• receive information about settings, status and events.
• see different types of alarms and receive instructions about how they
are to be rectified.
Display
Instructions, settings and operational information are shown on
the display. You can easily navigate between the different menus
and options to set the comfort or obtain the information you require.
A
Status lamp
The status lamp indicates the status of the heat pump. It:
• lights green during normal operation.
• lights yellow in emergency mode.
• lights red in the event of a deployed alarm.
B
13Chapter 2 | The heat pump – the heart of the houseNIBE F1255

OK button
The OK button is used to:
• confirm selections of sub menus/options/set values/page in the
start guide.
C
Back button
The back button is used to:
• go back to the previous menu.
• change a setting that has not been confirmed.
D
Control knob
The control knob can be turned to the right or left. You can:
• scroll in menus and between options.
• increase and decrease the values.
• change page in multiple page instructions (for example help text
and service info).
E
Switch
The switch assumes three positions:
•On ()
•Standby ( )
•Emergency mode ( )
Emergency mode must only be used in the event of a fault on the
heat pump. In this mode, the compressor switches off and the
immersion heater engages. The heat pump display is not illumin-
ated and the status lamp illuminates yellow.
F
USB port
The USB port is hidden beneath the plastic badge with the product
name on it.
The USB port is used to update the software.
Visit nibeuplink.com and click the "Software" tab to download the
latest software for your installation.
G
NIBE F1255Chapter 2 | The heat pump – the heart of the house14

MENU SYSTEM
When the door to the heat pump is opened, the menu system’s four
main menus are shown in the display as well as certain basic information.
Master
INDOOR CLIMATE
HEAT PUMP INFO
HOT WATER
SERVICE
Indoor temperature - (if room sensors are installed)
Hot water temp.
Temporary lux (if activated)
Outdoor
temperature
Estimated amount of hot water
Information about
operation
Slave
INFO
HOT WATER
If the heat pump is set as slave a limited main menu is displayed because
the majority of the settings for the system are made at the master heat
pump.
15Chapter 2 | The heat pump – the heart of the houseNIBE F1255

INDOOR CLIMATE
Setting and scheduling the indoor climate. See page 28.
Menu 1
HOT WATER
Setting and scheduling hot water production. See page 45.
Menu 2
This menu is also set in the slave heat pump's limited menu system.
INFO
Display of temperature and other operating information and access to the alarm
log. See page 50.
Menu 3
This menu is also set in the slave heat pump's limited menu system.
HEAT PUMP
Setting time, date, language, display, operating mode etc. See page 54.
Menu 4
NIBE F1255Chapter 2 | The heat pump – the heart of the house16

Symbols in the display
The following symbols can appear in the display during operation.
DescriptionSymbol
This symbol appears by the information sign if there is inform-
ation in menu 3.1 that you should note.
These two symbols indicate whether the compressor or ad-
dition is blocked in F1255.
These can, for example, be blocked depending on which op-
erating mode is selected in menu 4.2, if blocking is scheduled
in menu 4.9.5 or if an alarm has occurred that blocks one of
them.
Blocking the compressor.
Blocking additional heat.
This symbol appears if periodic increase or lux mode for the
hot water is activated.
This symbol indicates whether "holiday setting" is active in
4.7.
This symbol indicates whether F1255 has contact with NIBE
Uplink.
This symbol indicates the actual speed of the fan if the speed
has changed from the normal setting.
Accessory needed.
This symbol indicates whether pool heating is active.
Accessory needed.
This symbol indicates whether cooling is active.
Accessory needed.
17Chapter 2 | The heat pump – the heart of the houseNIBE F1255

INDOOR CLIMATE
HEAT PUMP INFO
HOT WATER
temperature
INDOOR CLIMATE 1
ventilation
scheduling
advanced
off
normal
Marked main menu
Menu number – marked sub menu Name and menu number – main menu
Symbol – main
menu
Status information – sub menus
Name – sub menusSymbols – sub menus
Operation
To move the cursor, turn the control knob to the left or the
right. The marked position is white and/or has a turned up
tab.
Selecting menu
To advance in the menu system select a main menu by marking it and
then pressing the OK button. A new window then opens with sub menus.
Select one of the sub menus by marking it and then pressing the OK
button.
NIBE F1255Chapter 2 | The heat pump – the heart of the house18

Selecting options
economy
comfort mode 2.2
normal
luxury
smart control
In an options menu the current selected option is indicated by a
green tick.
To select another option:
1. Mark the applicable option. One of the options is pre-selected
(white).
2. Press the OK button to confirm the selected option. The selec-
ted option has a green tick.
19Chapter 2 | The heat pump – the heart of the houseNIBE F1255

Setting a value
time & date4.4
time
day
year
month
24 h
12 h
date
Values to be changed
To set a value:
1. Mark the value you want to set using the control knob.
2. Press the OK button. The background of the value becomes
green, which means that you have accessed the setting mode.
3. Turn the control knob to the right to increase the value and to
the left to reduce the value.
4. Press the OK button to confirm the value you have set. To
change and return to the original value, press the Back button.
NIBE F1255Chapter 2 | The heat pump – the heart of the house20