Docking alternatives
SMO 20 can be connected with other products from
NIBE in several different ways, some of which are shown
below (accessories may be required).
Further option information is available at www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 49 for a list of the accessories
that can be used with SMO 20.
Installations with SMO 20 can produce heating and
hot water.
On cold days of the year when the access to energy
from the air is reduced the additional heating can
compensate and help to produce heat. The additional
heating is also good to have as assistance if the heat
pump ends up outside its working range or if it has
been blocked for any reason.
NOTE
The heating medium side and the hot water
side must be fitted with the necessary safety
equipment in accordance with the applicable
regulations.
This is the outline diagram. Actual installations
must be planned according to applicable
standards.
Explanation
SMO 20AA25
Outside sensorBT1
Temperature sensor, hot water chargingBT6
Temperature sensor, hot water topBT7
Temperature sensor, external flow lineBT25
Room sensorBT50
Temperature sensor, external supply line
after electric heater
BT63
Temperature sensor, external return lineBT71
Circulation pump, Heating mediumGP10
Reversing valve, Hot water/Heating medi-
um
QN10
Additional heatEB1
Immersion heaterEB1
Auxiliary relay/ContactorKA1
Heat pump systemEB101
Temperature sensor, returnBT3
Temperature sensor, condenser supply lineBT12
Heat pumpEB101
Safety valveFL10
Charge pumpGP12
Particle filterHQ1
Drain valve, Heating mediumQM1
Shut-off valve, Heating medium, FlowQM31
Shut off valve, Heating medium, ReturnQM32
Shut-off valveQM43
Miscel-
laneous
Expansion vessel closed, Hot waterCM1
Buffer vessel (UKV)CP5
Accumulator tank with hot water heatingCP10
Immersion heaterEB20
Safety valve, Heating mediumFL2
Auxiliary relay/ContactorKA1
Control valveRN10
Designations according to standards 81346-1 and
81346-2.
SMO 20Chapter 4 | Pipe connections8
