Nibe AXC 50 User guide

Installer manual
LEK
AXC 50
Accessories
IHB GB 1222-1
231158

Table of Contents
1 General 2
Contents 2
Component positions 2
2 Common electrical connection 3
Connecting the supply 3
Connecting communication 3
3 Shunt controlled additional
heat 4
General 4
Pipe connections 4
Outline diagram 5
Electrical connection 6
Program settings 7
Electrical circuit diagram 8
4 Step controlled additional
heat 9
General 9
Pipe connections 9
Outline diagram 10
Electrical connection 11
Program settings 12
Electrical circuit diagram 13
5 Extra climate system 14
General 14
Pipe connections 14
Outline diagram 15
Electrical connection 17
Program settings 18
Electrical circuit diagram 19
6 Hot water comfort 20
General 20
Pipe connections 20
Outline diagram 21
Electrical connection 22
Program settings 23
Electrical circuit diagram 24
7 Groundwater pump 25
General 25
Outline diagram 25
Electrical connection 26
Program settings 26
Electrical circuit diagram 27
8 Passive cooling (4-pipe) 28
General 28
Pipe connections 28
Outline diagram 29
Electrical connection 30
Program settings 31
Electrical circuit diagram 32
9 Passive cooling (2-pipe) 33
General 33
Pipe connections 33
Outline diagram 35
Electrical connection 36
Program settings 37
Electrical circuit diagram 38
10 Passive/active cooling (2-pipe) 39
General 39
Pipe connections 39
Outline diagram 40
Electrical connection 41
Program settings 43
Electrical circuit diagram 44
1Table of Contents |AXC 50

This accessory is used to enable connection and control
of (a AXC 50 is required for each of the following access-
ory functions that is used):
႑Shunt controlled additional heat
႑Step controlled additional heat
႑Passive cooling (4-pipe)
႑Passive cooling (2-pipe)
႑Passive/active cooling (2-pipe)
႑Extra climate system
႑Hot water comfort
႑Groundwater pump
Contents
Cable ties4x
Heating pipe paste2x
Insulation tape1x
Kit for accessory card1x
Aluminium tape2x
Temperature sensor2x
Component positions
LEK
AA5-X4
AA5-S2
AA5-X2 AA5-X9 X1
FA1
AA5-F1AA5
Electrical components
Miniature circuit-breaker. 10AFA1
Terminal block, power supplyX1
Accessory cardAA5
Terminal block, sensors and external
blocking
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 81346-1 and 81346-2.
AXC 50Chapter 1 | General2
1 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 heat pump must not be powered when in-
stalling AXC 50.
Electrical circuit diagrams are at the end of the chapter
for each connection option.
Connecting the supply
Connect the power supply to terminal block X1 as illus-
trated.
3
2
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230V 50Hz-X1
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Connecting communication
This accessory contains an accessories card (AA5) that
must be connected directly to the heat pump on terminal
block X6 in F1345.
If several accessories are to be connected or are already
installed, the following instructions must be followed.
The first accessory card must be connected directly to the
terminal block X6 in F1345. The following cards must be
connected in series with the previous card.
Use cable type LiYY, EKKX or similar.
1
2
3
4
5
6
7
8
AA5-X4
A
B
GND
A
B
GND
A
B
GND
A
B
GND
1
2
3
4
5
6
7
8
AA5-X4
X6
1234
A
B
GND
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3Chapter 2 | Common electrical connectionAXC 50
2 Common electrical connection

General
This connection 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 and a circulation
pump via AXC 50. If the heat pump cannot maintain the
right flow temperature the additional heating starts.
When the boiler temperature has been increased to about
55 ° C, the heat pump sends a signal to the shunt (QN11)
to open from the addition. The shunt (QN11) adjusts so
the true flow temperature corresponds with the control
system’s theoretical calculated set point value. When the
heating requirement drops sufficiently so the additional
heat is no longer required the shunt (QN11) closes com-
pletely. Minimum connection time for the boiler is 12
hours.
Pipe connections
The external circulation pump (GP10) is positioned accord-
ing to the outline diagram.
Shunt valve
The shunt valve (QN11) is located on the flow line to the
climate system after the heat pump according to the
outline diagram.
AB
B
A
႑Connect the flow line from the heat
pump to the external heat source via
the T-pipe to port B on the shunt
valve (closes at reduced signal).
႑Connect the flow line to the climate
system from the shunt valve to the
common port AB (always open)
႑Connect the flow line from the external additional heat
to the shunt valve to port A (opens at increased signal).
Temperature sensor
႑Install the boiler sensor (BT52) in a suitable location in
the external addition.
႑External flow temperature sensor (BT25, connected in
F1345) must be installed on the flow line to the radiat-
ors, after the shunt valve (QN11).
K
Install the temperature sensors with cable ties with the
heat conducting paste and aluminium tape. Then insulate
with supplied insulation tape.
NOTE
Sensor and communication cables must not be
placed near power cables.
AXC 50Chapter 3 | Shunt controlled additional heat4
3 Shunt controlled additional heat

Outline diagram
Explanation
Heat pump system (Master)EB100
Temperature sensor, outdoorBT1
Temperature sensor, hot water chargingBT6
Temperature sensor, heating medium flow,
External
BT25
Temperature sensor, heating medium return,
External
BT71
Heat pump, F1345EB100
Cooling module AEP14
Cooling module BEP15
Safety valve, collector sideFL11 - FL12
Safety valve, heating medium sideFL13 - FL14
Particle filterHQ12 - HQ15
Shut-off valve, brine sideQM50 - QM53
Shut-off valve, heating medium sideQM54 - QM57
Reversing valve, heating/hot waterQN10
Non-return valveRM10 - RM13
External additional heatEM1
Accessory card (AXC 50)AA5
Temperature sensor, boilerBT52
Expansion vessel, closedCM5
Oil/gas boilerEM1
Safety valve, heating medium sideFL10
Auxiliary relay, external additional heatKA1
Mixing valve, additionQN11
Miscel-
laneous
Manometer, brine sideBP6
Temperature sensor, hot water flowBT70
Accumulator tank with hot water coilCP10, CP11
Buffer vessel, UKVCP20
Expansion vessel, closed, brine sideCM3
Collector, brine sideEP12
Safety valve, brineFL3
Circulation pump, heating medium externalGP10
Circulation pump, heating medium externalGP18
Venting valve, brine sideQM21
Shut off valve, brine flowQM33
Shut off valve, brine returnQM34
Non-return valveRM21
Trim valveRN60 - RN63
Connection, filling brineXL27 - XL28
Designations according to standards 81346-1 and 81346-
2.
Outline diagram F1345 with AXC 50 and external addition
-EB100-BT71
-EP12
-CM3
P
-BP6 -QM21 -FL3
-XL28-XL27
-QM33
-QM34
-EB100-BT1
-EB100-BT25
-HQ15
-HQ14
-RM12
-RM13
-QM54
-FL12
-QM55
-QM56
-QM57
-FL13
-HQ13
-RM11
-HQ12
-RM10-QM50
-QM51
-FL10
-QM52
-QM53
-FL11
-EB100
-EP15
-EP14
-EB100
-EB100
-BT6
-CP10
-RN63
-RN62
-CP11
-RN60
-RN61
-EB100-QN10
-QN11
-BT52
-EM1-AA5
-CM5
-FL10 -KA1
-EM1
-EM1
-RM21
-GP18
-CP20
-GP10
5Chapter 3 | Shunt controlled additional heatAXC 50

Electrical connection
ON
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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.
F1345 must not be powered when installing
AXC 50.
Connection of sensors and external blocking
Use cable type LiYY, EKKX or similar.
Boiler sensor (BT52)
Connect the boiler sensor to AA5-X2:23-24.
External blocking (optional)
A contact (NO) can be connected to AA5-X2:21-22 to
block the addition. When the contact closes, the addition
is blocked.
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Caution
The relay outputs on the accessory card can have
a max load of 2 A (230 V) in total.
Connection of the circulation pump (GP10)
Connect the circulation pump (GP10) to AA5-X9:8 (230
V), AA5-X9:7 (N) and X1:3 (PE).
1
2
3
4
5
6
7
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Connection of the mixing valve motor (QN11)
Connect the mixing valve motor (QN11) to AA5-X9:6
(230 V, open), AA5-X9:5 (N) and AA5-X9:4 (230 V, close).
1
2
3
4
5
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7
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Connection of the auxiliary relay for addition-
al heating
Connect the auxiliary relay for switching the addition on
and off to AA5-X9:2 (230 V) and AA5-X9:3 (N).
1
2
3
4
L
N
A1 A2
External auxiliary relay
Additional
Heating
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AXC 50Chapter 3 | Shunt controlled additional heat6

DIP switch
The DIP switch on the accessory card must be set as fol-
lows.
ON
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ON
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-X9
-X2
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1
2
3
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Program settings
Program setting of AXC 50 can be performed via the start
guide or directly in the menu system.
Start guide
The start guide appears upon first start-up after heat
pump installation, but is also found in menu 5.7.
Menu system
If you do not make all settings via the start guide or need
to change any of the settings, this can be done in the
menu system.
Menu 5.2.4 - accessories
Activating/deactivating of accessories.
Select: "shunt controlled add. heat".
Menu 5.3.2 - shunt controlled add. heat
Here you can perform the following settings:
႑Select when the addition is to start.
႑Minimum running time.
႑Minimum boiler temperature at which the shunt can
start control.
႑Misc. shunt settings.
Menu 5.6 - forced control
Forced control of the different components in the heat
pump as well as in the different accessories that may be
connected.
EM1-AA5-K1: Activating the relay for extra heating.
EM1-AA5-K2: Signal (close) to mixing valve (QN11).
EM1-AA5-K3: Signal (open) to mixing valve (QN11).
EM1-AA5-K4: Activating the circulation pump (GP10).
Caution
Also see the Operating manual for F1345.
7Chapter 3 | Shunt controlled additional heatAXC 50

Electrical circuit diagram
AXC 50Chapter 3 | Shunt controlled additional heat8