NIBE S2125 Air Water Heat Pump User Manual

: June 11, 2024
: NIBE

Table of Contents

Important information
Serial number
Installation function
Control of S2125
Maintenance of S2125
Disturbances in comfort
Troubleshooting
Contact information
References
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S2125 Air Water Heat Pump
User Manual NIBE logo Air/water heat pump
NIBE S2125
UHB EN 2212-1
631687

Important information

Installation data

Product	S2125
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.
Date __
Signed ___
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 using the product.

Serial number

The serial number can be found on the rear cover and at the bottom on the side. NIBE S2125 Air Water Heat Pump - rear cover Caution
You need the product’s (14 digit) serial number for servicing and support.

Installation function

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) . NIBE S2125 Air Water
Heat Pump - transported The temperatures are only examples and may vary between different installations and time of year.
Outdoor air
A The outdoor air is sucked into the heat pump.
B The fan then routes the air to the heat pump’s evaporator. Here, the air releases the heating energy to the refrigerant and the air’s temperature drops. The cold air is then blown out of the heat pump.
Refrigerant circuit
C A gas 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 outdoor air and starts to boil.
D 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 0 °C to approx 80 °C.
E From the compressor, gas is forced into a heat exchanger, condenser, where it releases heat energy to the indoor module, whereupon the gas is cooled and condenses to a liquid form again.
F 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.
Heat medium circuit
G 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 temperature).
H The heating medium circulates in a closed system and transports the heated water’s heat energy to the house radiators/heating coils.
I 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.

Control of 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 necessary settings for the heat pump in the indoor module or control module, so that the heat pump works optimally in your system.

Maintenance of S2125

Regular checks
When your heat pump is located outdoors some external maintenance is required.
NOTE
Insufficient maintenance can cause serious damage to S2125, which is not covered by the guarantee.
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 assistance if required.
Keep free of snow and ice NIBE S2125 Air Water Heat Pump - transported
1 Prevent snow from building up and covering the grilles and drain holes on S2125.
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.
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.

Disturbances in comfort

In most cases, the indoor module/control module notes a malfunction (a malfunction can lead to disturbance in comfort) 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 limiters.
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.

Contact information

AUSTRIA
KNV Energietechnik GmbH
Gahberggasse 11, 4861 Schörfling
Tel: +43 (0)7662 8963-0
mail@knv.at
knv.at
FINLAND
NIBE Energy Systems Oy
Juurakkotie 3, 01510 Vantaa
Tel: +358 (0)9 274 6970
info@nibe.fi
nibe.fi
GREAT BRITAIN
NIBE Energy Systems Ltd
3C Broom Business Park,
Bridge Way, S41 9QG Chesterfield
Tel: +44 (0)330 311 2201
info@nibe.co.uk
nibe.co.uk
POLAND
NIBE-BIAWAR Sp. z o.o.
Al. Jana Pawla II 57, 15-703 Bialystok
Tel: +48 (0)85 66 28 490
biawar.com.pl
SWITZERLAND
NIBE Wärmetechnik c/o ait Schweiz AG
Industriepark, CH-6246 Altishofen
Tel. +41 (0)58 252 21 00
info@nibe.ch
nibe.ch| CZECH REPUBLIC
Družstevní závody Dražice – strojírna s.r.o.
Dražice 69, 29471 Benátky n. Jiz.
Tel: +420 326 373 801
nibe@nibe.cz
nibe.cz
FRANCE
NIBE Energy Systems France SAS
Zone industrielle RD 28
Rue du Pou du Ciel, 01600 Reyrieux
Tél: 04 74 00 92 92
info@nibe.fr
nibe.fr
NETHERLANDS
NIBE Energietechniek B.V.
Energieweg 31, 4906 CG Oosterhout
Tel: +31 (0)168 47 77 22
info@nibenl.nl
nibenl.nl
RUSSIA
EVAN
bld. 8, Yuliusa Fuchika str.
603024 Nizhny Novgorod
Tel: +7 831 288 85 55
info@evan.ru
nibe-evan.ru| DENMARK
Vølund Varmeteknik A/S
Industrivej Nord 7B, 7400 Herning
Tel: +45 97 17 20 33
info@volundvt.dk
volundvt.dk
GERMANY
NIBE Systemtechnik GmbH
Am Reiherpfahl 3, 29223 Celle
Tel: +49 (0)5141 75 46 -0
info@nibe.de
nibe.de
NORWAY
ABK-Qviller AS
Brobekkveien 80, 0582 Oslo
Tel: (+47) 23 17 05 20
post@abkqviller.no
nibe.no

SWEDEN
NIBE Energy Systems
Box 14
Hannabadsvägen 5, 285 21 Markaryd
Tel: +46 (0)433-27 3000
info@nibe.se
nibe.se

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For countries not mentioned in this list, contact NIBE Sweden or check nibe.eu for more information.
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

NIBE Energy Systems
Hannabadsvägen 5
Box 14
SE-285 21 Markaryd
info@nibe.se
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