Nibe SMO 20 - Basic Operation; Navigating Through Menus

COMPATIBLE NIBE AIR/WATER HEAT PUMP TOGETHER WITH SMO 20 – DOCKING
STEP-CONTROLLED ADDITIONAL HEAT BEFORE THE REVERSING VALVE FOR HOT WATER
AS WELL AS COOLING FUNCTION (4-PIPE SYSTEM)
-FL2
-CM1
-EB101
-QM1
-BT3
-BT12
-QM31
-GP12
-BT1
-AA25
-AA25
-AA25
-BT50
-AA25
-BT63
-KA1
-EB1
-FL10
-QZ2
-RN10
-CP10
-AA25-QN10
-AA25-BT7
-AA25-BT6
-GP13
-CP6
-BT64
-EQ1-QN12
-EQ1
-EB1
Caution
NIBE does not supply all components in this
outline diagram.
SMO 20 (AA25) starts and stops the heat pump (EB101)
to meet the heat and hot water demand of the installa-
tion. At simultaneous heating and hot water demand
the reversing valve switches (AA25-QN10) periodically
between the climate system and the water heater/accu-
mulator tank (CP10). When the hot water heater/accu-
mulator tank is fully charged (CP10), the reversing valve
switches (AA25-QN10) to the climate system.
Additional heat (EB1) is connected automatically when
the power demand for the installation exceeds the heat
pump capacity. This is used for both heating and char-
ging hot water.
The additional heat can also be used if a higher temper-
ature in the hot water is required than the heat pump
can produce.
During cooling operation (requires compatible heat
pump) the reversing valve (EQ1-QN12) switches to the
cooling system (EQ1). If several simultaneous demands
occur while there is a cooling demand the installation
reacts differently. In event of a hot water demand the
reversing valve (EQ1-QN12) switches back and hot water
is produced until the demand is fulfilled. In event of a
heating demand the reversing valve (EQ1-QN12) instead
switches periodically between the demands. If the
cooling demand is met, the reversing valve switches
back to basic mode (heat/hot water).
15Chapter 4 | Pipe connectionsNIBE SMO 20