Nibe S2125 User guide

Installer manual
Air/water heat pump
NIBE S2125
IHB EN 2212-1
631663

41 Important information
4Safety information
4Symbols
4Marking
4Serial number
5Inspection of the installation
6
Compatible indoor modules (VVM) and control
modules (SMO)
6Indoor module
6Control module
72 Delivery and handling
7Transport
8Assembly
10Condensation
11Supplied components
12Removing the side panel and top panel
13Installation of automatic gas separator
163 The heat pump design
16General
20Distribution box
21Sensor placement
224 Pipe connections
22General
22Symbol key
23Pipe coupling heating medium circuit
245 Electrical connections
24General
24Accessibility, electrical connection
25Connections
306 Commissioning and adjusting
30Preparations
30Filling and venting
30Start-up and inspection
30Post adjustment and venting
31Adjustment, charge flow
327 Control
32General
32LED status
32Master control
33Control conditions
34Control - Heat pump EB101
378 Service
37Service actions
389 Disturbances in comfort
38Troubleshooting
40Alarm list
4210 Accessories
4311 Technical data
43Dimensions
44Sound levels
45Technical specifications
49Energy labelling
52Electrical circuit diagram
60Item register
63Contact information
3Table of ContentsNIBE S2125
Table of Contents

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
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 consider when installing or servi-
cing the installation.
TIP
This symbol indicates tips on how to facilitate us-
ing the product.
Marking
Explanation of symbols that may be present on the product’s
label(s).
Fire hazard!
Read the User Manual.
Read the Installer Manual.
Disconnect the voltage supply before starting work.
Dangerous voltage.
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.
NIBE S2125Chapter 1 | Important information4
Important information

Inspection of the installation
Current regulations require the heating installation to undergo an installation inspection before it is commissioned. The
inspection must be carried out by a suitably qualified person. In addition, fill in the page for information regarding the in-
stallation data in the User Manual.
DateSignatureNotesDescription
✔
Heating medium (page 22)
Automatic gas separator installed
System flushed
System vented
Particle filter
Shut-off and drain valve
Charge flow set
Electricity (page 24)
Fuses property
Safety breaker
Earth circuit-breaker
Heating cable type/effect
Fuse size, heating cable (F3)
Communication cable connected
S2125 addressed (only when cascade connec-
tion)
Cooling permitted
Connections
Main voltage
Phase voltage
Miscellaneous
Condensation water pipe
Insulation for condensation water pipe,
thickness (unless KVR 11 is used)
NOTE
Check the connections, main voltage and phase voltage before powering up the heat pump, to prevent damage
to the heat pump electronics.
5Chapter 1 | Important informationNIBE S2125

Compatible indoor modules (VVM) and control modules (SMO)
SMO S40VVM S320
XXS2125-8
XXS2125-12
SMO 40SMO 20VVM 500VVM 310VVM 225
XXXXXS2125-8
XXXXS2125-12
Indoor module
VVM S320
Stainless steel, 3x230 V
Part no. 069 201
VVM S320
Stainless steel, 1x230 V
Part no. 069 198
VVM S320
Stainless steel, 3x400 V
Part no. 069 196
VVM S320
Enamel, 3x400 V
Part no. 069 206
VVM S320
Copper, 3x400 V
Part no. 069 195
Control module
SMO S40
Control module
Part no. 067 654
SMO 20
Control module
Part no. 067 224
SMO 40
Control module
Part no. 067 225
NIBE S2125Chapter 1 | Important information6

Transport
S2125 must be transported and stored vertically.
NOTE
Ensure that the heat pump cannot fall over during
transport.
Check that the heat pump has not been damaged during
transport.
LIFT FROM THE STREET TO THE SET UP
LOCATION
If the base allows, the simplest thing is to use a pallet truck
to move the S2125 to the set up location.
NOTE
The centre of gravity is offset to one side (see print
on the packaging).
LEK
C:a 180 kg
Approx. 180 kg
If S2125 needs to be transported across soft ground, such
as a lawn, we recommend using a crane truck that can lift
it to the installation location. When S2125 is lifted with a
crane, the packaging must be untouched.
If a crane vehicle cannot be used the S2125 can be transpor-
ted on an extended sack truck. S2125 must be taken from
its heaviest side and two people are required to lift S2125.
LIFT FROM THE PALLET TO FINAL POSITIONING
Before lifting remove the packaging and the securing strap
to the pallet.
Place lifting straps around each machine foot. Lifting from
the pallet to the base requires four persons, one for each
lifting strap.
SCRAPPING
When scrapping, the product is removed in reverse order.
Lift by the bottom panel instead of a pallet!
7Chapter 2 | Delivery and handlingNIBE S2125
Delivery and handling

Assembly
•Place the heat pump in a suitable location outdoors to
prevent any risk of the refrigerant flowing in through
ventilation openings, doors or similar openings in the event
of a leak. It must also not constitute a hazard to people or
property in any other way.
•If the heat pump is placed in a location where any refriger-
ant leak could accumulate, for example below ground level
(in a dip or low-lying recess), the installation must satisfy
the same requirements that apply for gas detection and
the ventilation of engineering rooms. Requirements regard-
ing sources of ignition must be applied where appropriate.
•Place S2125 outdoors on a solid level base that can take
the weight, preferably a concrete foundation. If concrete
slabs are used they must rest on asphalt or shingle.
•The lower edge of the evaporator must not be lower than
the level of the average local snow depth. The base should
be at least 70 mm tall.
•S2125 should not be positioned next to noise sensitive
walls, for example, next to a bedroom.
•Also ensure that the placement does not inconvenience
the neighbours.
•S2125 must not be placed so that recirculation of the
outdoor air is possible. Recirculation entails reduced power
and impaired efficiency.
•The evaporator must be sheltered from direct wind / ,
which negatively affects the defrosting function. Place
S2125 protected from wind / against the evaporator.
•A small amount of water may drip from the drainage hole
under S2125. Make sure that the water can run away by
selecting a suitable material underneath S2125 (see sec-
tion "Condensation").
•Care must be exercised so that the heat pump is not
scratched during installation.
LEK
S2125
LEK
S2125
LEK
S2125
min 300 mm
min
70 mm
Do not place S2125 directly on the lawn or other non solid
surface.
If there is a risk of snow slip from roof, a protective roof or
cover must be erected to protect the heat pump, pipes and
wiring.
NIBE S2125Chapter 2 | Delivery and handling8

INSTALLATION AREA
The distance between S2125 and the house wall must be at least 350 mm, but not more than 500 mm in locations that are
exposed to the wind. The free space above S2125 must be at least 1,000 mm. The free space in front must be at least
1,000 mm for any future servicing.
350 mm
Fritt utrymme bakom
Fritt utrymme framför
dock 1000 mm för ev. framtida service
Min. avstånd
vid användning
av flera F2300
600 mm
1000 mm
400 mm
Minimalt
fritt utrymme
600mm
Minimalt
fritt utrymme
Minimum free
space Minimum free space
Minimum distance during use
of several S2125
600 mm
600 mm
400 mm
Free space in front for any future servicing
350 – 500 mm
Free space behind*
At least 1,000
mm
* The space behind must not exceed 500 mm in locations that are exposed to the wind.
9Chapter 2 | Delivery and handlingNIBE S2125

Condensation
The condensate drain pan collects and leads away the con-
densation water.
NOTE
It is important to the heat pump function that
condensation water is led away and that the drain
for the condensation water run off is not posi-
tioned so that it can cause damage to the house.
Condensation run-off should be checked regularly,
especially during the autumn. Clean if necessary.
•The condensation water (up to 50 litres/24 hrs) that col-
lects in the trough should be routed away by a pipe to an
appropriate drain, it is recommended that the shortest
outdoor stretch possible is used.
•The section of the pipe that can be affected by frost must
be heated by the heating cable to prevent freezing.
TIP
Pipe with heating cable for draining the condens-
ation water trough is not included.
To ensure the function, the accessory KVR 11
should be used.
•Route the pipe downward from S2125.
•The outlet of the condensation water pipe must be at frost
free depth.
•Use a water trap for installations where air circulation may
occur in the condensation water pipe.
•The insulation must seal against the bottom of the con-
densation water trough.
DRAINAGE OF CONDENSATION
Stone caisson
LEK
Frostfritt djup
S2125
Frost proof depth
If the house has a cellar the stone caisson must be posi-
tioned so that condensation water does not affect the house.
Otherwise the stone caisson can be positioned directly under
the heat pump.
Gutter drainage
LEK
S2125
Frostfritt
djup
Frost free
depth
Water seal
Route the pipe downward from S2125.
The condensation water pipe must have a water seal to
prevent air circulation in the pipe.
Caution
If none of the recommended alternatives is used
good lead off of condensation water must be as-
sured.
NIBE S2125Chapter 2 | Delivery and handling10

Supplied components
1 x filterball (G1") (QZ2)
1 x flexible pipe with bend
(WN1)
1 x flexible pipe (WN2)
(Dimensions, flexible pipes
DN25, G1")
4 x gaskets
1 x non-return valve (RM1.2)
1 x automatic gas separator
(HQ8)
11Chapter 2 | Delivery and handlingNIBE S2125

Removing the side panel and top panel
Undo the screws, lift off the top panel and the top insulation.
LEK
NIBE S2125Chapter 2 | Delivery and handling12

Installation of automatic gas
separator
The automatic gas separator and the safety valve should
always be installed as instructed below.
1. Check that all O-rings are present and that they are
undamaged. Lubricate them with soapy water or similar
to make installation easier.
Press the gas separator into place. Fit the clip. Twist the
clip to ensure that it fastens properly.
Place the bracket in position, parallel with the outer
edge. Secure the bracket with a screw. Use a socket
wrench, size 10 mm.
2. Assemble the parts of the safety valve. Ensure that the
arrow for the outlet is pointing down, as illustrated.
3. Then fit the safety valve with the associated pipes. The
safety vale must be at an angle of 45°. Fit the clip. Twist
the clip to ensure that it fastens properly.
45º
4. Install the non-return valve. Fit the clip. Twist the clip
to ensure that it fastens properly.
13Chapter 2 | Delivery and handlingNIBE S2125

5. Install the right-hand side of the metal box. The lug in
the insulation must go into the round hole in the bracket.
6. Fit the left-hand side in the same way.
7. Check that both halves of the gas separator are properly
in place, parallel with the edge of the heat pump.
8. Fit the cover. Secure with three screws. Two screws in
the lid, on the right and left-hand sides, and one screw
in the bottom.
NIBE S2125Chapter 2 | Delivery and handling14

9. Secure the gas separator to the heat pump using two
screws, one at the top and one at the bottom.
10. Install the lid that conceals the safety valve.
11. Screw the flexible pipes into place. The flexible pipes
can be installed angled straight back or down, depending
on which of the pipe connections the 90° bend is in-
stalled on. Install the flexible pipes with a slight bend,
so they can absorb any vibrations that would otherwise
be propagated through the building.
NOTE
Don’t forget the flat gaskets.
12. Check that the venting opening is not covered with pipe
insulation. Pipe insulation should extend as far as the
coupling and must not cover the opening.
15Chapter 2 | Delivery and handlingNIBE S2125

General
S2125 (1x230V)
GQ1
AA2
UB1
BT12
EP2
XL1
BT3
XL2
HS1
XL21
BT84
QN4
RM1.1
QN2
QN1
BT17
BT14 EB10
QA40 GQ10RA1X6
BP9
BP1
BP2
BP8
XL20
HQ9
BT15
CA1 FQ14
NIBE S2125Chapter 3 | The heat pump design16
The heat pump design

S2125 (3x400V)
GQ1
AA2
UB1
BT12
EP2
XL1
BT3
XL2
HS1
XL21
BT84
QN4
RM1.1
QN2
QN1
BT14 EB10
QA40 GQ10RF2RA1
BP9
BP1
BP2
BP8
XL20
HQ9
BT17BT15
PF1 FQ14
AA13
17Chapter 3 | The heat pump designNIBE S2125

Serie nr.
Data label
PZ4
BT16
PZ1
BT28
EP1
WM5
XL40
XL1XL2
PZ3
PZ3
UB1
RM1.2
HQ8
FL2
QM20
NIBE S2125Chapter 3 | The heat pump design18

PIPE CONNECTIONS
Heating medium connection, supply (from S2125)XL1
Heating medium connection, return (to S2125)XL2
Service connection, high pressureXL20
Service connection, low pressureXL21
Connection, drain condensation water troughXL40
HVAC COMPONENTS
Safety valve, heating mediumFL2
Automatic gas separator1 HQ8
Non-return valve1 RM1.2
Vent valve, heating mediumQM20
Condensation water troughWM5
1Enclosed (not factory-fitted).
SENSORS ETC.
High pressure pressostatBP1
Low pressure pressostatBP2
Low pressure transmitterBP8
High pressure sensorBP9
Temperature sensor, returnBT3
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, evaporatorBT16
Temperature sensor, suction gasBT17
Temperature sensor, ambientBT28
Temperature sensor, suction gas evaporatorBT84
ELECTRICAL COMPONENTS
Base cardAA2
Triac boardAA13
Capacitor (1x230V)CA1
Compressor heaterEB10
Temperature limiter, compressorFQ14
FanGQ1
Signal lamp (LED 201)PF1
InverterQA40
Harmonic filter (3x400V)RA1
Choke (1x230V)RA1
EMC filter (3x400V)RF2
Terminal block (1x230V)X6
COOLING COMPONENTS
EvaporatorEP1
CondenserEP2
CompressorGQ10
Particle filterHQ9
Drying filterHS1
Expansion valveQN1
4-way valveQN2
Bypass valveQN4
Non-return valveRM1.1
MISCELLANEOUS
Type platePZ1
Serial numberPZ3
Sign, pipe connectionsPZ4
Cable gland, incoming supplyUB1
Designations according to standard EN 81346-2.
19Chapter 3 | The heat pump designNIBE S2125

Distribution box
AA2 FC1
X24 F4 F2 F1
S2
S1
X23
X22
X21
X27 F3 X2 X1 X5
X9
S3
ELECTRICAL COMPONENTS
Base cardAA2
Terminal block, incoming supplyX1
Terminal block, compressor supplyX2
Terminal block, external control voltageX5
Terminal block, connection KVRX9
Terminal block, Compressor blocking, TariffX21
Terminal block, communicationsX22
Terminal block, communicationsX23
Terminal block, fanX24
Terminal block, expansion valve QN1X27
Fuse, operating 230V~, 4AF1
Fuse, operating 230V~, 4AF2
Fuse for external heating cable, KVR, 250mAF3
Fuse, fan, 4AF4
Miniature circuit-breaker (Replaced with automatic pro-
tection (FB1) when installing accessory KVR 11.)
FC1
DIP switch, addressing heat pump during multi operationS1
DIP switch, different optionsS2
Reset buttonS3
NIBE S2125Chapter 3 | The heat pump design20