Optional connections
MASTER/SLAVE
Several heat pumps can be interconnected by selecting
one heat pump as master and the others as slaves.
Ground source heat pump models with master/slave
functionality from NIBE can be connected to F1355.
The heat pump is always delivered as master and up to
till 8 slaves can be connected to it. In systems with
several heat pumps, each pump must have a unique
name. Only one heat pump can be "Master" and only
one can be for example "Slave 5". Set master/slaves in
menu 5.2.1.
External temperature sensors and control signals must
be connected solely to the master, except for external
control of the compressor module and reversing valve(s)
(QN10) that can be connected one to each heat pump.
See page 29 for connecting the reversing valve (QN10).
NOTE
When several heat pumps are connected to-
gether (master/slave), external return sensor
BT71 must be used. If BT71 is not connected,
the product gives a sensor fault.
Connect the communications cables to the Master’s
terminal block AA101-X10:1 (A), AA101-X10:2 (B) and
AA101-X10:3 (GND), as illustrated.
Incoming communications cables from Master or Slave
to Slave are connected to the terminal block AA101-
X10:1 (A), AA101-X10:2 (B) and AA101-X10:3 (GND), as
illustrated.
Incoming communications cables from Slave to Slave
are connected to terminal block AA101-X10:4 (A),
AA101-X10:5 (B) and AA101-X10:6 (GND), as illustrated.
Use cable type LiYY, EKKX or similar.
1 2 3 4
1 2 3 4 5 6 7
1 2 3 4 5 6 7
A
B
GND
A
B
GND
A
B
GND
A
B
GND
A
B
GND
EB100 - Master
EB101 - Slave 1
EB102 - Slave 2
AA101-X10
AA101-X10
AA101-X10
25Chapter 5 | Electrical connectionsNIBE F1355
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