Nibe AXC 50, Installer Manual

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General
This accessory is used when F1345 is installed in houses
with up to four different climate systems that require
different flow line temperatures, for example, in cases
where the house has both a radiator system and an under
floor heating system.
Caution
Underfloor heating systems are normally max
flow line temperature set between 35 and 45
°C.
Check the max temperature for your floor with
your floor supplier.
Caution
If the room sensor is used in a room with under
floor heating it should only have an indicatory
function, not control of the room temperature.
Pipe connections
General
When connecting extra climate systems, they must be
connected so that they have a lower working temperature
than the climate system 1.
Circulation pump
The extra circulation pump (GP20) is positioned in the
extra climate system according to the outline diagram.
Shunt valve
The mixing valve (QN25) is located on the flow line after
the heat pump/indoor module, before the first radiator
in the climate system 1. The return line from the addition-
al climate system must be connected to the shunt valve
and to the return line from the heating system 1, see
image and outline diagram.
B
A
AB
႑
Connect the flow line to the climate system
from the heat pump to port A on the shunt
valve (opens at increased signal)
႑
Connect the return line from the climate
system to port B on the shunt valve via the
T-pipe to (closes at reduced signal).
႑ Connect the flow line to the climate system
to the common port AB on the shunt valve
(always open).
Temperature sensor
႑
The flow temperature sensor (BT2) is installed on the
pipe between the circulation pump (GP20) and mixing
valve (QN25).
႑ The return line sensor (BT3) is installed on the pipe from
the extra climate system.
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 50 Chapter 5 | Extra climate system 14
5 Extra climate system