Nibe SMO S40 Installer Manual page 20

Sensors
Temperature sensor installation on pipe
The temperature sensors are fitted using heat conducting
paste, cable ties (the first cable tie is secured to the pipe in
the middle of the sensor and the other cable tie is mounted
approx. 5 cm after the sensor) and aluminium tape. Then
insulate them using the enclosed insulation tape.
Outside sensor
The outdoor temperature sensor (BT1) is placed in the shade
on a wall facing north or north-west, so it is unaffected, for
example, by the morning sun.
Connect the outdoor temperature sensor to terminal block
AA100-X10:1 and AA100-X11:GND.
If a conduit is used it must be sealed to prevent condensa-
tion in the sensor capsule.
AA100-X10
BT1 1
BT50 2
BT6 3
BT7 4
5
BT25
AA100-X11
BT71 6
Temperature sensor, hot water charging
The temperature sensor, hot water charging (BT6) is placed
in the submerged tube on the water heater.
Connect the sensor to terminal block AA100-X10:3 and
AA100-X11:GND.
Settings for hot water are made in menu 2 "Hot water".
AA100-X10
BT1 1
BT50 2
BT6 3
BT7 4
5
BT25
AA100-X11
20 Chapter 5 | Electrical connections
BT1
BT6
Temperature sensor, hot water top
A temperature sensor for hot water top (BT7) can be connec-
ted to SMO S40 to show the water temperature at the top
of the tank (if it is possible to install a sensor at the top of
the tank).
Connect the sensor to terminal block AA100-X10:4 and
AA100-X11:GND.
AA100-X10
BT7 4
BT25 5
BT71 6
AUX1 7
AUX2 8
AA100-X11
External return line sensor
Connect an external return line sensor (BT71) to terminal
block AA100-X10:6 and AA100-X11:GND.
AA100-X10
BT7 4
BT25 5
BT71 6
AUX1 7
8
AUX2
AA100-X11
External supply temperature sensor
Connect an external supply temperature sensor (BT25) to
terminal block AA100-X10:5 and AA100-X11:GND.
AA100-X10
BT7 4
BT25 5
BT71 6
AUX1 7
8
AUX2
AA100-X11
Room sensor
SMO S40 is supplied with an enclosed room sensor (BT50)
that makes it possible to display and control the room tem-
perature.
Fit the room sensor in a neutral position where a set temper-
ature is required. A suitable location might be, for example,
on a free inner wall in a hall approx. 1.5 m above the floor. It
is important that the room sensor is not obstructed from
measuring the correct room temperature, for example by
being located in a recess, between shelves, behind a curtain,
above or close to a heat source, in a draught from an external
door or in direct sunlight. Closed radiator thermostats can
also cause problems.
SMO S40 operates without room sensor, but if you want to
read the home's indoor temperature from the display on
SMO S40, the room sensor must be fitted. Connect the room
sensor to terminal block AA100-X10:2 and AA100-X11:GND.
BT7
BT71
BT25
NIBE SMO S40