Symbol key
MeaningSymbol
Unit box
Shut-off valve
Tapping valve
Non-return valve
Mixing valve
Circulation pump
Expansion vessel
Filterball
Pressure gauge
Particle filter
Safety valve
Temperature sensor
Reversing valve/shunt
Heat exchanger
Overflow valve
Under floor heating systems
Control module
Cooling system
Air/water heat pump
Pool
Radiator system
Domestic hot water
Addition
Water heater
Temperature sensor
installation on pipe
The temperature sensors are mounted with heat con-
ducting 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 beyond the sensor)
and aluminium tape. Then insulate with supplied insula-
tion tape.
NOTE
Sensor and communication cables must not
be placed near power cables.
Fixed condensing
If SMO S40 is only to work towards a water heater with
fixed condensing, you must connect external supply
temperature sensor (BT25) according to the description
in section "Temperature sensor, external flow line". In
addition, you must make the following menu settings.
Menu setting (local vari-
ations may be required)
Menu
Desired temperature in the
tank.
1.30.4 – Lowest supply,
heating
Desired temperature in the
tank.
1.30.6 – Highest supply,
heating
Manual4.1 – Operating mode
NIBE SMO S40Chapter 4 | Installing the installation14