External adjustment for climate systems 2 to 4 require
accessories (ECS 40).
See the accessory’s installer handbook for installation
instructions.
Contact for activation of fan speed
Caution
The external contact function functions only if
the accessory FLM is installed and activated.
An external contact function can be connected to F1245
for activation of one of the four fan speeds. The switch
must be potential free and connected to the selected in-
put (menu 5.4, see page 65) on terminal block X6 on the
input circuit board (AA3). When the switch closes, the
selected fan speed is activated. Normal speed is resumed
when the contact is opened again.
NV 10, pressure/level/flow monitor brine
If the level sensor (accessory NV10) is desired for the brine
installation it can be connected on the selected input
(menu 5.4, see page 65) on terminal block X6 on the in-
put circuit board (AA3).
Pressure and flow sensors can also be connected to the
input.
For function the input must be connected during normal
operation.
Possible selection for AUX output (potential
free variable relay)
It is possible to have an external connection through the
relay function via a potential free variable relay (max 2
A) on the input circuit board (AA3), terminal block X7.
Optional functions for external connection:
႑
Indication of buzzer alarm.
႑
Controlling ground water pump.
႑
Cooling mode indication (only applies if accessories
for cooling are present or if the heat pump has the
integrated cooling function).
႑
Control of circulation pump for hot water circulation.
႑
External circulation pump (for heating medium).
႑
External, reversing valve for hot water.
If any of the above is installed to terminal block X7 it must
be selected in menu 5.4, see page 65.
The common alarm is preselected at the factory.
NOTE
An accessory card is required if several functions
are connected to terminal block X7 at the same
time that the buzzer alarm is activated (see page
75).
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The picture shows the relay in the alarm position.
When switch (SF1) is in the "
"or“ ” position the
relay is in the alarm position.
External circulation pump, ground water pump or hot
water circulation pump connected to the buzzer alarm
relay as illustrated below.
NOTE
Mark up any junction boxes with warnings for
external voltage.
L
L
N
N
PE
PE
F1X45
Externt
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Caution
The relay outputs can have a max load of 2 A
(230 V AC) in total.
25Chapter 5 | Electrical connectionsNIBE™ F1245
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