Switch for external blocking of hot water
In cases where external blocking of hot water is used,
this can be connected to terminal block X6 on the input
board (AA3), 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 48.
A closed switch results in blocked hot water operation.
Contact for activation of “temporary lux"
An external switch function can be connected to F470
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 48) on terminal block
X6 on the input board (AA3).
"temporary lux" is activated for the time that the contact
is connected.
Contact for activation of “external adjustment"
An external contact function can be connected to F470
to change the supply temperature and the room temper-
ature.
When the switch is closed the temperature changes in
°C (if the room sensor is connected and activated). If a
room sensor is not connected or activated, the desired
change of "temperature" (heating curve offset) with the
number of steps selected is set. The value is adjustable
between -10 and +10.
■
climate system 1
The switch must be potential-free and connected to
the selected input (menu 5.4, see page 48) on terminal
block X6 on the input board (AA3).
The value for the change is set in menu 1.9.2, "external
adjustment".
■
climate system 2 to 8
External adjustment for climate systems 2 to 8 requires
accessories (ECS 40 or ECS 41).
See the accessory’s installer handbook for installation
instructions.
Contact for activation of fan speed
An external contact function can be connected to F470
for activation of one of the four fan speeds. The switch
must be potential free and connected to the selected
input (menu 5.4, see page 48) on terminal blockX6 on
the input circuit board (AA3). When the switch closes,
the selected fan speed is activated. Normal speed is re-
sumed when the contact is opened again.
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:
■
Indication of buzzer alarm.
■
Control of circulation pump for hot water circulation.
■
External circulation pump, for example external pump
and shunt group.
■
External damper for anti-freeze.
If any of the above is installed to terminal block X7 it
must be selected in menu 5.4, see page 48.
The common alarm is preselected at the factory.
NOTE
An accessory board is required, if several func-
tions are connected to terminal block X7 at the
same time the common alarm is activated (see
page 56).
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 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.
NIBE F470Chapter 5 | Electrical connections30
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