Nibe AXC 40 User guide

Installer Manual
Accessory card
IHB 2113-10
031444
AXC 40
LEK

S-series
S1255
4
S-series
F-series
34
F-series

S-series
4Important information
5General
6Common electrical connection
8Shunt controlled additional heat
13Step controlled additional heat
17Hot water comfort
22Ground water system
26Shunt controlled brine
30Pulse energy meter
32Technical data
63Contact information
3AXC 40
S
S-SERIES
Table of Contents

Important information
SAFETY INFORMATION
This manual describes installation and service proced-
ures for implementation by specialists.
The manual must be left with the customer.
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 super-
vision or instruction 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.
This is an original manual. It may not be
translated without the approval of NIBE.
Rights to make any design or technical
modifications are reserved.
©NIBE 2021.
SYMBOLS
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should consider when installing
or servicing the 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, regardless of where they are
made.
CE
Classification of enclosure of electro-technical
equipment.
IP21
Danger to person or machine.
!
Read the User Manual.
Read the Installer Manual.
AXC 40 S-series | GB4
S
S-series

General
This accessory is used to enable connection and control
of the following accessory functions. One AXC 40 is
required for each function.
• shunt-controlled additional heat
• step-controlled additional heat
• control of circulation pump for hot water circulation
• controlling ground water pump
• shunt-controlled brine
COMPATIBLE PRODUCTS
• S1155
• S1255
• VVM S320
• VVM S325
CONTENTS
Cable ties4 x
Heating pipe paste2 x
Insulation tape1 x
AXC module1 x
Aluminium tape2 x
Temperature sensor2 x
COMPONENT LOCATION, AXC MODULE
(AA25)
AA5-X4 AA5-S2
AA5-X2
AA5
AA25-X1
AA5-X9
AA25-FC1
ELECTRICAL COMPONENTS
Accessory cardAA5
DIP switchAA5-S2
Terminal block, inputsAA5-X2
Terminal block, communicationAA5-X4
Terminal block, outputsAA5-X9
AXC moduleAA25
Miniature circuit-breakerAA25-FC1
Terminal block, power supplyAA25-X1
Designations according to standard EN 81346-2.
5AXC 40 S-series | GB
S

Common electrical
connection
NOTE
All electrical connections must be carried out
by an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with the stipulations in force.
The main product must be disconnected from
the power supply when installing AXC 40.
• To prevent interference, sensor cables to external
connections must not be laid close to high voltage
cables.
• The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX, LiYY or equivalent.
• AXC 40 must be installed via an isolator switch. The
cable area has to be dimensioned based on the fuse
rating used.
• Mark the relevant electrical cabinet with a warning
about external voltage, in those cases where a com-
ponent in the cabinet has a separate supply.
• AXC 40 restarts after a power failure.
Electrical circuit diagrams are at the end of the chapter
for each connection option.
CABLE LOCK
Use a suitable tool to release/lock cables in terminal
blocks.
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
LEK
1
1
2
2
3
3
1
2
3
3
4
1
2
1
2
MOUNTING
The AXC module (AA25) is a separate, electric control
module and must be mounted on a wall.
Caution
The screw type must be adapted to the surface
on which installation is taking place.
UN
Use all mounting points and mount the module upright,
flat against the wall.
Leave at least 100 mm of free space around the module
to allow access and make cable routing easier during
installation and servicing.
NOTE
The installation must be carried out in such a
way that IP21 is satisfied.
OVERVIEW ACCESSORY BOARD (AA5)
ON
12345678
-X9
-X2
24 20212223 1516171819 1011121314 56789 1
1
N
L
PE
PE
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
9
234
-X8
-X4
-X10
-X1
AA5-X2 AA5-X9AA5-S2
AA5-X4
CONNECTING COMMUNICATION
AXC 40 contains an accessory board (AA5) that connects
directly to the main product’s PCB (terminal block AA2-
X30).
If more accessories are to be connected, or are already
installed, the boards are connected in series.
AXC 40 S-series | GB6
S

Because there can be different connections for accessor-
ies with accessory board (AA5), you should always read
the instructions in the manual for the accessory that is
to be installed.
B A GND +12V
AA2-X30
1 2 3 4
AA5-X4
1
2
3
4
5
6
7
8
A
B
GND
A
B
GND
AA5-X4
1
2
3
4
5
6
7
8
A
B
GND
A
B
GND
Main product
Accessory 1
Accessory 2
The terminal block (AA2-X30) is upright on S1155.
POWER CONNECTION
Connect the power supply cable to terminal block AA25-
X1 as illustrated.
Tightening torque for earth cable: 0.5–0.6 Nm.
AA25-X1
N
L
ExterntProduktNamn
2
1
AA25 External
7AXC 40 S-series | GB
S

Shunt controlled
additional heat
GENERAL
This function enables an external additional heater, e.g.
an electric boiler, wood boiler, pellet boiler, oil boiler,
gas boiler or district heating, to assist with the heating.
The heat pump/indoor module controls a shunt valve
(EM1-QN11) and a circulation pump (EM1-GP10) via
AXC 40. If the heat pump/indoor module cannot manage
to maintain the correct supply temperature (EB100-
BT25), the additional heat starts. When the temperature
on the boiler sensor (EM1-BT52) exceeds the set value,
the heat pump transmits a signal to the shunt (EM1-
QN11) to open from the additional heat. The shunt (EM1-
QN11) is regulated so that the true supply temperature
agrees with the heat pump’s theoretically calculated set
point value. When the heating demand drops sufficiently
so that additional heat is no longer required, the shunt
(EM1-QN11) closes completely.
Factory-set minimum operating time for the boiler is 12
hours.
The function smart energy source can be selected if you
want to prioritise automatically between heat pump
operation and additional heat versus the best price or
environmental impact.
COMPATIBLE PRODUCTS
• S1155
• S1255
• VVM S320
• VVM S325
PIPE CONNECTIONS
The external circulation pump (EM1-GP10) is placed on
the supply line to the climate system after the temper-
ature sensor (AA35-BT25).
SHUNT VALVE
The shunt valve (EM1-QN11) must be placed on the
supply line to the climate system after the heat pump
according to the outline diagram.
AB
B
A
• Connect the supply line from the
heat pump to the external heat
source via the T-pipe to port B on
the shunt valve (closes on reduce
signal).
• Connect the supply line to the climate system from
the shunt valve to the common port AB (always open)
• Connect the supply line from the external additional
heat to the shunt valve to port A (opens on increase
signal).
TEMPERATURE SENSOR
• Install the boiler sensor (EM1-BT52) in a suitable loca-
tion in the external additional heat.
• External supply temperature sensor (EB100-BT25,
connected in the heat pump/indoor module) must be
installed on the supply line to the climate system, after
the shunt valve (EM1-QN11).
LEK
LEK
E
Install the temperature sensors using cable ties, together
with the heat conducting paste and aluminium tape.
Then insulate with the enclosed insulation tape.
NOTE
To prevent interference, sensor cables to ex-
ternal connections must not be laid close to
high voltage cables.
AXC 40 S-series | GB8
S

SYSTEM DIAGRAM
Caution
This is an outline diagram. Actual installations
must be planned according to applicable
standards.
EXPLANATION
Mixing valve controlled additional heat,
boiler
EM1
AXC moduleAA25
Boiler sensorBT52
External heating medium pumpGP10
Mixing valve, additionQN11
Heat pumpEB100
External supply temperature sensorBT25
External return line sensorBT71
Miscellaneous
Non-return valveRM1
OUTLINE DIAGRAM WITH
SHUNT-CONTROLLED ADDITIONAL HEAT
-EM1-GP10
-EB100-BT25
-RM1
-EB100
-EB100-BT71
-EM1-AA25
-EM1-BT52
-EM1-QN11
-EM1
-EM1
ELECTRICAL CONNECTION
NOTE
Read section "Common electrical connection"
for instructions regarding electrical connection.
CONNECTION OF SENSORS AND EXTERNAL
BLOCKING
Boiler sensor (EM1-BT52)
Connect the sensor to AA5-X2:23-24.
Caution
Sensor cable splicing must fulfil IP54.
24 23 22 21 20 19 18 17 16 15 14 13
AA25
External
BT52
AA5-X2
External blocking (optional)
A contact (NO) can be connected to AA5-X2:21-22 to
block the accessory. When the contact closes, the ac-
cessory is blocked.
24 23 22 21 20 19 18 17 16 15 14 13
AA25
External
External blocking
AA5-X2
External supply temperature sensor (EB100-BT25)
Sensor (BT25) must be connected in the main product.
See the Installer Manual for the main product.
External return line sensor (EB100-BT71)
Sensor (BT71) must be connected in the main product.
See the Installer Manual for the main product.
9AXC 40 S-series | GB
S

Caution
The relay outputs on the accessory board can
have a max load of 2A (230V) in total.
CONNECTION OF THE CIRCULATION PUMP
(EM1-GP10)
Connect the external heating medium pump (GP10) to
AA5-X9:7 (N), AA5-X9:8 (230 V) and X1:PE.
1
2
3
4
5
6
7
8
9
AA5-X9
2
1
1
M
AA25-X1
ExternalAA25
GP10
CONNECTION OF THE SHUNT VALVE
MOTOR (EM1-QN11)
Connect the shunt motor (QN11) to AA5-X9:6 (230V,
open), AA5-X9:5 (N) and AA5-X9:4 (230V, close).
1
2
3
4
5
6
7
8
9
AA25 External
AA5-X9
QN11
Open SH +
N
SH -
Close
Connection of 0-10 V control of shunt motor
(EM1-QN11)
Connect a 2-core cable to AA5-X2:5 (0-10 V) and AA5-
X2:6 (GND).
AA5-X2
0-10V
GND
7654
AA25
External
At 0 V the shunt is closed and at 10 V the shunt is open.
CONNECTION OF THE AUXILIARY RELAY
FOR ADDITIONAL HEATING
Connect the auxiliary relay for switching the additional
heat on and off to AA5-X9:2 (230V) and AA5-X9:3 (N).
L
N
A1 A2
External auxiliary relay
Additional
Heating
1
2
3
4
Additional
heat
External auxiliary relay
AA5-X9
AA25 External
DIP SWITCH
The DIP switch (S2) on the accessory board (AA5) must
be set as follows.
32
1
ON
476
58
AXC 40 S-series | GB10
S