Nibe S2125 User manual

User manual
Air/water heat pump
NIBE S2125
UHB EN 2212-1
631687

41 Important information
4Installation data
5Symbols
5Serial number
62 Installation function
83 Control of S2125
94 Maintenance of S2125
9Regular checks
10In event of long power cuts
10Silent mode
10Fan de-icing
10Updating the software
115 Disturbances in comfort
11Troubleshooting
15Contact information
3Table of ContentsNIBE S2125
Table of Contents

Installation data
S2125Product
Serial number
Installation date
Installer
Accessories
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 S2125Chapter 1 | Important information4
Important information

Symbols
Explanation of symbols that may be present in this manual.
NOTE
This symbol indicates danger to person or machine.
Caution
This symbol indicates important information about
what you should observe when maintaining your
installation.
TIP
This symbol indicates tips on how to facilitate us-
ing the product.
Serial number
The serial number can be found on the rear cover and at the
bottom on the side.
Caution
You need the product's (14 digit) serial number for
servicing and support.
5Chapter 1 | Important informationNIBE S2125

An air/water heat pump installation uses the outdoor air to
heat up a home. The conversion of the outdoor air’s energy
into residential heating occurs in three different circuits.
From the outdoor air, (1) , free heat energy is retrieved and
transported to the heat pump. The heat pump increases the
retrieved heat’s low temperature to a high temperature in
the refrigerant circuit, (2) . The heat is distributed around
the building in the heating medium circuit, (3) .
45 ºC
55 ºC
80 ºC 5 ºC
6 ºC
1 ºC
0 ºC
A
BC
F
EG
H
ID
123
Heating medium
Refrigerant
Outdoor air
Compressor
Condenser
Evaporator
Expansion valve
The temperatures are only examples and may vary between different installations and time of year.
NIBE S2125Chapter 2 | Installation function6
Installation function

Outdoor air
The outdoor air is sucked into the heat pump.
A
The fan then routes the air to the heat pump’s evaporat-
or. Here, the air releases the heating energy to the refri-
gerant and the air's temperature drops. The cold air is
then blown out of the heat pump.
B
Refrigerant circuit
A gas circulates in a closed system in the heat pump, a
refrigerant, which also passes the evaporator. The refri-
gerant has a very low boiling point. In the evaporator the
refrigerant receives the heat energy from the outdoor
air and starts to boil.
C
The gas that is produced during boiling is routed into an
electrically powered compressor. When the gas is com-
pressed, the pressure increases and the gas's temperat-
ure increases considerably, from 0 °C to approx 80 °C.
D
From the compressor, gas is forced into a heat ex-
changer, condenser, where it releases heat energy to
the indoor module, 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 refri-
gerant 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 indoor module's water, the
heating medium, which is heated to 55 °C (supply tem-
perature).
G
The heating medium circulates in a closed system and
transports the heated water's heat energy to the house
radiators/heating coils.
H
The indoor module’s integrated charge coil is placed in
the boiler section. The water in the coil heats up the
surrounding domestic hot water.
I
7Chapter 2 | Installation functionNIBE S2125

S2125 is controlled in different ways depending on your
system. You control the heat pump via your indoor module
(VVM) or control module (SMO).
See the Installer Manual for the indoor module/control
module.
During installation, the installation engineer adjusts the ne-
cessary settings for the heat pump in the indoor module or
control module, so that the heat pump works optimally in
your system.
NIBE S2125Chapter 3 | Control of S21258
Control of S2125

Regular checks
When your heat pump is located outdoors some external
maintenance is required.
NOTE
Insufficient maintenance can cause serious dam-
age to S2125, which is not covered by the guaran-
tee.
CHECKING GRILLES AND BOTTOM PANEL ON
S2125
Check regularly throughout the year that the grille is not
clogged by leaves, snow or anything else.
You should be particularly vigilant during windy conditions
and/or in the event of snow, as the grille can become
blocked.
Also check that the drain holes in the bottom panel are free
from dirt and leaves.
Regularly check that condensation is routed away correctly
through the condensation pipe. Ask your installer for assist-
ance if required.
Keep free of snow and ice
S2125 S2125
S2125S2125
LEK
LEK
LEK
LEK
Prevent snow from building up and covering the grilles and drain holes on
S2125.
S2125 S2125
S2125S2125
LEK
LEK
LEK
LEK
Keep free of snow and/or ice.
CLEANING THE OUTER CASING
If necessary the outer casing can be cleaned using a damp
cloth.
Care must be exercised so that the heat pump is not
scratched when cleaning. Avoid spraying water into the
grilles or the sides so that water penetrates into S2125.
Prevent S2125 coming into contact with alkaline cleaning
agents.
9Chapter 4 | Maintenance of S2125NIBE S2125
Maintenance of S2125

In event of long power cuts
In the event of prolonged power failures it is recommended
that the part of the heating system located outdoors is
drained. Your installer has installed a shut off and drain valve
to facilitate this. Call and ask your installer if you are unsure.
Caution
Also disconnect the non-return valve (RM1.2) to
prevent the condenser from freezing.
Silent mode
The heat pump can be set to "Silent mode", which reduces
the heat pump’s noise level. This function is useful when
S2125 must be placed in noise-sensitive areas. The function
should only be used for limited periods, because S2125 might
not reach its dimensioned power.
Fan de-icing
S-SERIES – VVM S / SMO S
Menu 4.11.3 - Fan de-icing
F-SERIES – VVM / SMO
Menu 4.9.7 - tools
FAN DE-ICING
Setting range: off/on
CONTINUOUS FAN DE-ICING
Setting range: off/on
Fan de-icing: Here, you set whether the "fan de-icing"
function will be activated during the next "active defrosting".
This can be activated if ice/snow sticks to the fan, grille or
fan cone, which may be noticed due to abnormal fan noise
from S2125.
"Fan de-icing" means that the fan, grille and fan cone are
heated using hot air from the evaporator (EP1).
Continuous fan de-icing: There is the option to set recurring
de-icing. In this case, every tenth defrosting will be "Fan
de-icing". (This can increase annual energy consumption.)
Updating the software
Information about updating software can be found in the
Installer Manual for your indoor module or control module.
NIBE S2125Chapter 4 | Maintenance of S212510

In most cases, the indoor module/control module notes a
malfunction (a malfunction can lead to disturbance in com-
fort) and indicates this with alarms and action instructions
in the display.
NOTE
Work behind covers secured by screws may only
be carried out by, or under the supervision of, a
qualified installation engineer.
Troubleshooting
If the operational interference is not shown in the display
the following tips can be used:
BASIC ACTIONS
Start by checking the following:
•All supply cables to the heat pump are connected.
•Group and main fuses of the accommodation.
•The property's earth circuit breaker.
•The heat pump’s fuse / automatic protection.
•The indoor module’s/control module’s fuses.
•The indoor module’s/control module’s temperature lim-
iters.
•That S2125 does not have any external damage.
ICE BUILD-UP IN THE FAN, GRILLE AND/OR FAN
CONE
Set the "Fan de-icing" function in the indoor module/control
module. For more information, see the section "Control –
Heat pump EB101" in the Installer Manual.
If problems arise, contact your installer.
WATER BELOW S2125 (LARGER AMOUNT)
•Fit an accessory KVR 11 to divert condensation from the
air/water heat pump.
•Check that the water drainage via the condensation pipe
(KVR 11) is working.
11Chapter 5 | Disturbances in comfortNIBE S2125
Disturbances in comfort

Contact information
DENMARKCZECH REPUBLICAUSTRIA
Vølund Varmeteknik A/S
Industrivej Nord 7B, 7400 Herning
Tel: [phone]
[email protected]
volundvt.dk
Družstevní závody Dražice - strojírna
s.r.o.
Dražice 69, 29471 Benátky n. Jiz.
Tel: [phone]
[email protected]
nibe.cz
KNV Energietechnik GmbH
Gahberggasse 11, 4861 Schörfling
Tel: [phone]
[email protected]
knv.at
GERMANYFRANCEFINLAND
NIBE Systemtechnik GmbH
Am Reiherpfahl 3, 29223 Celle
Tel: [phone]
[email protected]
nibe.de
NIBE Energy Systems France SAS
Zone industrielle RD 28
Rue du Pou du Ciel, 01600 Reyrieux
Tél: [phone]
[email protected]
nibe.fr
NIBE Energy Systems Oy
Juurakkotie 3, 01510 Vantaa
Tel: [phone]
[email protected]
nibe.fi
NORWAYNETHERLANDSGREAT BRITAIN
ABK-Qviller AS
Brobekkveien 80, 0582 Oslo
Tel: [phone]
[email protected]
nibe.no
NIBE Energietechniek B.V.
Energieweg 31, 4906 CG Oosterhout
Tel: [phone]
[email protected]
nibenl.nl
NIBE Energy Systems Ltd
3C Broom Business Park,
Bridge Way, S41 9QG Chesterfield
Tel: [phone]
[email protected]
nibe.co.uk
SWEDENRUSSIAPOLAND
NIBE Energy Systems
Box 14
Hannabadsvägen 5, 285 21 Markaryd
Tel: [phone]
[email protected]
nibe.se
EVAN
bld. 8, Yuliusa Fuchika str.
603024 Nizhny Novgorod
Tel: [phone]
[email protected]
nibe-evan.ru
NIBE-BIAWAR Sp. z o.o.
Al. Jana Pawla II 57, 15-703 Bialystok
Tel: [phone]
biawar.com.pl
SWITZERLAND
NIBE Wärmetechnik c/o ait Schweiz AG
Industriepark, CH-6246 Altishofen
Tel. [phone]
[email protected]
nibe.ch
For countries not mentioned in this list, contact NIBE Sweden or check nibe.eu for more information.

NIBE Energy Systems
Hannabadsvägen 5
Box 14
SE-285 21 Markaryd
[email protected]
nibe.eu
UHB EN 2212-1 631687
This is a publication from NIBE Energy Systems. All product illustrations, facts and data are based
on the available information at the time of the publication’s approval.
NIBE Energy Systems makes reservations for any factual or printing errors in this publication.
©2022 NIBE ENERGY SYSTEMS 631687
WS name: -Gemensamt
WS version: a951
WS release date: 2022-02-02 08:50
Publish date: 2022-04-21 07:52