Temperature sensor, external flow line
If temperature sensor, external flow line (BT25) needs
to be used, connect it to selected input (menu 5.4, see
page 37) on terminal block X1. Use a 2 core cable of at
least 0.5 mm² cable area.
Switch for external blocking of addition and/or
compressor
Blocking for addition heat and compressor is connected
on two different AUX inputs.
In those cases where external blocking of additional heat
and/or compressor is wanted, it can be connected to
terminal block X1, which is positioned behind the front
cover.
The additional heat and/or the compressor are discon-
nected by connecting a potential-free switch function
to the input selected in menu 5.4, see page 37.
External blocking of addition and compressor can be
combined.
A closed contact results in the electrical output being
disconnected.
Contact for external tariff blocking
In those cases where external tariff blocking is used, it
can be connected to terminal block X6 on the input
board (AA3), which is positioned behind the front cover.
Tariff blocking means that the additional heat, the
compressor, the heating and hot water are blocked by
connecting a potential-free switch function to the input
selected in menu 5.4, see page 37.
Closed switch means that tariff blocking is activated.
NOTE
When tariff blocking is activated, the min. supply
line does not apply.
Switch for "SG ready"
NOTE
This function can only be used in mains net-
works that support the "SG Ready"-standard .
"SG Ready" requires two AUX inputs.
In cases where this function is required, it must be con-
nected to terminal block X6 on the input card (AA3).
"SG Ready" is a smart form of tariff control where your
electricity supplier can affect the indoor and hot water
temperatures or simply block the additional heat and/or
the compressor in the heat pump at certain times of the
day (can be selected in menu 4.1.5 after the function is
activated). Activate the function by connecting potential-
free switch functions to two inputs selected in menu 5.4
(SG Ready A and SG Ready B), see page 37.
Closed or open switch means one of the following:
■
Blocking (A: Closed, B: Open)
"SG Ready" is active. The compressor in the heat pump
and additional heat is blocked like the day's tariff
blocking.
■
Normal mode (A: Open, B: Open)
"SG Ready" is not active. No effect on the system.
■
Low price mode (A: Open, B: Closed)
"SG Ready" is active. The system focuses on costs sav-
ings and can for example exploit a low tariff from the
electricity supplier or over-capacity from any own
power source (effect on the system can be adjusted
in the menu 4.1.5).
■
Overcapacity mode (A: Closed, B: Closed)
"SG Ready" is active. The system is permitted to run at
full capacity at over capacity (very low price) with the
electricity supplier (effect on the system is settable in
menu 4.1.5).
(A = SG Ready A and B = SG Ready B )
Contact for external blocking of heating
In those cases where external blocking of heat is used,
it can be connected to terminal block X1, which is posi-
tioned behind the front cover.
Heating operation is disconnected by connecting a po-
tential-free switch function to the input selected in menu
5.4, see page 37.
A closed switch results in blocked heating operation.
NOTE
When heat blocking is activated, the min. supply
line does not apply.
Switch for external blocking of hot water
In those cases where external blocking of hot water is
used, it can be connected to terminal block X1, which is
positioned behind the front cover.
Hot water operation is disconnected by connecting a
potential-free switch function to the input selected in
menu 5.4, see page 37.
A closed switch results in blocked hot water operation.
Switch for external forced control of brine pump
In those cases external forced control of the brine pump
is used, this can be connected to terminal block X1, which
is positioned behind the front cover.
The brine pump can be force controlled by connecting
a potential free switch function to the input selected in
menu 5.4, see page 37.
A closed switch means that the brine pump is active.
Contact for activation of “temporary lux"
An external switch function can be connected to F1226
for activation of the hot water function "temporary lux".
The switch must be potential-free and connected to the
selected input (menu 5.4, see page 37) on terminal block
X1.
"temporary lux" is activated for the time that the contact
is connected.
23Chapter 5 | Electrical connectionsNIBE F1226
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