Nibe AXC 40 Benutzerhandbuch

Installer Manual

Accessory card

IHB 2113-10

031444

AXC 40

LEK

S-series

S1255

S-series

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-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.

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-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

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

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.

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)

12345678

-X9

-X2

24 20212223 1516171819 1011121314 56789 1

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

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.

GND

+12V

AA2-X30

1 2 3 4

AA5-X4

GND

AA5-X4

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

ExterntProduktNamn

AA25 External

7AXC 40 S-series | GB

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.

• 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

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

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

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

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.

AA5-X9

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).

AA25 External

AA5-X9

QN11

Open SH +

SH -

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).

A1 A2

External auxiliary relay

Additional

Heating

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.

476

AXC 40 S-series | GB10

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