Nibe AXC 40 Benutzerhandbuch

Installer manual

LEK

AXC 40

Accessories

IHB EN 1722-8

031444

Table of Contents

41 Important information

52 General

5Contents

5Component location unit box (AA25)

63 Common electrical connection

6Connecting communication

6Connecting the supply

74 Shunt controlled additional heat

7General

7Pipe connections

8Outline diagram

12Electrical connection

13Program settings

14Electrical circuit diagram

155 Step controlled additional heat

15General

15Pipe connections

16Outline diagram

20Electrical connection

21Program settings

22Electrical circuit diagram

236 Hot water circulation

23General

23Outline diagram

26Electrical connection

26Program settings

27Electrical circuit diagram

287 Groundwater pump

28General

28Outline diagram

30Electrical connection

31Program settings

32Electrical circuit diagram

3Table of Contents |AXC 40

NOTE

This symbol indicates danger to person or ma-

chine .

Caution

This symbol indicates important information

about what you should observe when maintain-

ing your installation.

TIP

This symbol indicates tips on how to facilitate

using the product.

AXC 40Chapter 1 | Important information4

1 Important information

This accessory is used to enable connection and control

of (a AXC 40 is required for each of the following access-

ory functions that is used):

■Shunt controlled additional heat

■Step controlled additional heat

■Pump for hot water circulation

■Groundwater pump

Contents

Cable ties4 x

Heating pipe paste2 x

Insulation tape1 x

Unit box with accessory card1 x

Aluminium tape2 x

Temperature sensor2 x

Component location unit box

(AA25)

LEK

AA5-X4

AA5-S2

AA5-X2 AA5-X9 X1

FA1

AA5-F1AA5

Electrical components

Miniature circuit breaker, 10 AFA1

Terminal block, power supplyX1

Accessory cardAA5

Terminal block, sensors and external block-

ing

AA5-X2

Terminal block, communicationAA5-X4

Terminal block, circulation pump, mixing

valve and auxiliary relay

AA5-X9

DIP switchAA5-S2

Fine wire fuse, T4AH250VAA5-F1

Designations in component locations according to

standard IEC 81346.

5Chapter 2 | GeneralAXC 40

2 General

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.

Electrical circuit diagrams are at the end of the chapter

for each connection option.

Connecting communication

This accessory contains an accessory board (AA5) that

must be connected directly to the compatible product

on the input board (terminal block AA3-X4).

If several accessories are to be connected or are already

installed, the following instructions must be followed.

The first accessory board must be connected directly to

the terminal block in the compatible product and the

following boards must be connected in series with the

previous board.

Use cable type LiYY, EKKX or similar.

AA5-X4

GND

AA3-X4

AA5-X4

Compatible product

Accessory card 1

Accessory card 2

12345678

-X9

-X2

24 20212223 1516171819 1011121314 56789 1

234

-X8

-X4

-X10

-X1

12345678

-X9

-X2

24 20212223 1516171819 1011121314 56789 1

234

-X8

-X4

-X10

-X1

AA5-X4

AA3-X4

F1245/F1255

VVM 225/310/320/325/500

AA3-X4

F1145/F1155

Connecting the supply

Connect the power supply to terminal block X1 as illus-

trated.

230V 50Hz

AXC40 External

AXC 40Chapter 3 | Common electrical connection6

3 Common electrical connection

General

This function enables an external additional heater, e.g.

an oil boiler, gas boiler or district heating exchanger to

aid with heating.

The heat pump controls a shunt valve (QN11) and a cir-

culation pump (GP10) via AXC 40. If the heat pump

cannot manage to maintain the correct supply temper-

ature, the additional heat starts. When the boiler tem-

perature has increased to about 55 °C, the heat pump

sends a signal to the shunt to open from the additional

heat. The shunt is governed so the true supply temperat-

ure corresponds with the control system’s theoretical

calculated set point value. When the heating require-

ment drops sufficiently, so that the additional heat is no

longer required, the shunt closes completely. Factory-set

minimum run time for the boiler is 12 hours (can be ad-

justed in menu 5.3.2).

Prioritised additional heat refers to heating from an ex-

ternal, non-controlled heat source which, if available, is

prioritised to be used before the heat pump. An example

of prioritised additional heat would be a wood fired

boiler or back boiler.

Compatible products

■F1145

■F1155

■F1245

■F1255

■VVM 225

■VVM 310

■VVM 320

■VVM 325

■VVM 500

Pipe connections

The external circulation pump (GP10) is positioned ac-

cording to the outline diagram.

Shunt valve

The shunt valve (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 (BT52) in a suitable location in

the external additional heat.

■External supply temperature sensor (BT25, connected

in the heat pump/indoor module) must be installed

on the supply line to the radiators, after the shunt valve

(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

Sensor and communication cables must not be

placed near power cables.

7Chapter 4 | Shunt controlled additional heatAXC 40

4 Shunt controlled additional heat

Outline diagram

Explanation

Heat pump systemEB100

Temperature sensor, outdoorBT1

Temperature sensor, hot water chargingBT6

Temperature sensor, heating medium flow,

external

BT25

Expansion vessel, heating medium sideCM1

Heat pumpEB100

Safety valve, heating medium sideFL2

Circulation pump, externalGP10

Particle filterHQ1

Shut-off valve, heating medium sideQM31 -

QM32

External additional heatEM1

Unit box with accessory card (AXC 40)AA25

Temperature sensor, boilerBT52

Expansion vessel, closedCM5

Oil/gas boilerEM1

Safety valve, heating medium sideFL10

Auxiliary relay, external additional heatKA1

Mixing valve, additionQN11

Miscel-

laneous

Level vessel, collector sideCM2

Accumulator tank with hot water coilCP10

Collector, brine sideEP12

Safety valve, brineFL3

Filler valveQM12

Shut off valve, brine returnQM34

Shut-off valveQM42

Non-return valveRM1

Connection, filling brineXL15

Designations according to standard IEC 81346 - 1 and

81346 - 2.

Outline diagram F1145, F1155 with AXC 40 and shunt-controlled additional heat

-QM31

-QM32

-FL3

-QM42

-QM12

-CM2

-HQ1

-FL2

-CM1

-QM34

-XL15

-EB100-BT1

-EB100

-BT6

-EB100

-CP10

-QN11

-EM1 -BT52

-CM5

-KA1

-FL10

-EB100-BT25 -EM1-GP10

-AA25

-RM1

-EM1

-EP12

AXC 40Chapter 4 | Shunt controlled additional heat8

Outline diagram F1245, F1255 with AXC 40 and shunt-controlled additional heat

-FL3

-QM42

-QM12

-CM2

-QM34

-XL15

-EB100-BT1

-QM31

-QM32

-HQ1

-EB100

-FL2

-CM1

-EP12

-QN11

-EM1 -BT52

-CM5

-KA1

-FL10

-EB100-BT25 -EM1-GP10

-RM1

-AA25

-EM1

9Chapter 4 | Shunt controlled additional heatAXC 40

Outline diagram VVM 225 with AXC 40 and

shunt-controlled additional heat

-EB15

-XL4 -XL3

-QN11

-EM1 -BT52

-CM5

-KA1

-EM1

-FL10

-EB15 -BT25

-AA25

-XL1-XL2

-RM1

-EM1

-GP10

Outline diagram VVM 310 with AXC 40 and

shunt-controlled additional heat

For connection of an external energy source solely to

the heating system, suitable when the energy source has

a large volume, such as a wood boiler with an accumu-

lator tank. This connection uses the accessory AXC 40.

With the following example, the prioritised additional

heat function can be used.

-FL2

-CM1

-EB15 -XL2 -XL1

-QN11 -BT25

-AA25

-CP2

-EM1

-GP15

-BT52

-EM1

Outline diagram VVM 320 with AXC 40 and

shunt-controlled additional heat

-EB15

-QN11

-EM1 -BT52

-CM1

-KA1

-EM1

-FL2

-EB15 -BT25

-AA25

-XL1

-XL2

AXC 40Chapter 4 | Shunt controlled additional heat10

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