Nibe FLM User manual
UHB EN 1850-5
031398
USER MANUAL
Exhaust air module
NIBE FLM
LEK
LEK
LEK
LEK
41 Important information
4Installation data
5Safety information
6Serial number
7NIBE FLM – An excellent choice
82 The heating installation – the heart of the house
9Exhaust air module function
10Maintenance of NIBE FLM
133 Disturbances in comfort
13
Info menu
13Manage alarm
15Troubleshooting
174 Technical data
185 Glossary
20Item register
23Contact information
3Table of ContentsNIBE FLM
Table of Contents
Installation data
NIBE FLMProduct
Serial number
Installation date
Installer
SetFact.
sett.
NameNo.
XDifferential brine in-/outX
100%Exhaust air fan (fan speed, normal mode)X
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 FLMChapter 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 2018.
If the supply cable is damaged, only NIBE, its service
representative or similar authorised person may replace
it to prevent any danger and damage.
SYMBOLS
NOTE
This symbol indicates danger to person or machine .
Caution
This symbol indicates important information about what you
should observe when maintaining your installation.
5Chapter 1 | Important informationNIBE FLM
Serial number
The serial number can be found at the bottom left inside the front cover.
LEK
Serial number
Caution
You need the product's (14 digit) serial number for servicing
and support.
NIBE FLMChapter 1 | Important information6
NIBE FLM – An excellent choice
NIBE FLM is part of a new generation of heating products, which have
been developed to supply your home with inexpensive and environment-
ally friendly heating and/or cooling in the most efficient way possible.
NIBE FLM provides you with mechanical exhaust air with recycling and
can be connected to most ground source heat pumps from NIBE. NIBE
FLM gives a better indoor climate, increases the heat pump’s output
and allows the length of the collector coil to be reduced in some cases.
The energy that is in the home’s indoor air can be used to recharge the
borehole/collection coil.
EXCELLENT PROPERTIES FOR NIBE FLM:
•DC fan
An energy efficient DC fan (Class A) is integrated in the exhaust air
module.
•Low noise level
The exhaust air module has a very low noise level.
•Easy to install
NIBE FLM is easy to install together with any heat pump. When in-
stalling together with a compatible heat pump from NIBE, the exhaust
air module is connected to the heat pump, allowing you to read off the
exhaust air module’s values from the heat pump’s display.
COMPATIBLE NIBE HEAT PUMPS
• F1345
• F1355
• F1245
• F1255
• F1145
• F1155
7Chapter 1 | Important informationNIBE FLM
Värmebärare
Köldmedium
Köldbärare
Förångare
Kondensor 100 °C
-2 °C
Expansionsventil Kompressor
50 °C40 °C
22 °C 0 °C
Värmekälla
Rumsluft
-3 °C 0 °C
22 °C0 °C
D
F
C
E
A
B
J
K
G
Brine
Heat source
Room air
Refrigerant
Heating medium
Evaporator
Condenser
Expansion valve Compressor
The temperatures are only examples and may vary between different installations and
time of year.
NIBE FLMChapter 2 | The heating installation – the heart of the house8
2 The heating installation – the
heart of the house
Exhaust air module function
An exhaust air module uses the heat that is in the building's ventilation
air to heat up the brine.
Brine circuit
An anti-freeze liquid (brine) circulates in a hose (collector) 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 refrigerant,
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 increases and the
gas’s temperature increases considerably, from approx. 5°C to approx. 100°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 tem-
perature. 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 heat energy that the refrigerant produces in the condenser is retrieved
by the climate system's water, heating medium, which is heated to 35 °C
(supply temperature).
G
Ventilation
The hot air is transferred from the rooms to the heat pump via the exhaust
air module.
J
The fan then routes the air to the exhaust air module heat exchanger. Here,
the air releases the heating energy to the brine and the air's temperature
drops significantly. The cold air is then blown out of the house.
K
The temperatures are only examples and may vary between different installations and
time of year.
9Chapter 2 | The heating installation – the heart of the houseNIBE FLM
Maintenance of NIBE FLM
REGULAR CHECKS
Your exhaust air module requires minimal maintenance after commis-
sioning. On the other hand, it is recommended that you check your in-
stallation regularly.
If NIBE FLM is installed with a compatible heat pump and something
untoward occurs, a message appears regarding the malfunction in the
form of various alarm texts in the heat pump display.
Cleaning the ventilation devices
The building’s ventilation devices should be
cleaned regularly with, for example, a small
brush to maintain the correct ventilation.
The device settings must not be changed.
NOTE
If you take down more than one
ventilation device for cleaning, do not
mix them up.
Cleaning the air filter
Clean the NIBE FLM's air filter regularly, how often depends on the
amount of dust in the ventilation air. Select what is most suitable for
your installation.
Caution
The efficiency of the installation can be impaired by a dirty air
filter.
If NIBE FLM is connected to a compatible heat pump, you receive a re-
minder to clean the filters in the display. The default setting for the re-
minder is every three months; however, if the power to the heat pump
is interrupted, the countdown starts from zero again.
NIBE FLMChapter 2 | The heating installation – the heart of the house10
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