Cold and hot water
CONNECTING THE HOT WATER HEATER
• Controlling hot water sensor (BT6) and display hot
water sensor (BT7) are placed in the water heater.
• Fit shut-off valve, non-return valve and safety valve as
illustrated.
• The safety valve must have max. 1.0 MPa (10.0 bar)
opening pressure, and be installed on the incoming
domestic water line as shown.
• A mixer valve must also be installed, if the factory
setting for hot water is changed. National regulations
must be observed.
• Hot water production is activated in the start guide or
in menu 7.1.1.
Installation alternative
SMO S40 can be connected in several different ways,
some of which are shown below.
More information about the alternatives is available at
nibe.eu/ODM and in the relevant assembly instructions
for the accessories used. See section "Accessories" for
a list of the accessories that can be used with SMO S40.
BUFFER VESSEL UKV
UKV is an accumulator tank that is suitable for connec-
tion to a heat pump or another external heat source, and
can have several different applications. It can also be
used during external control of the heating system.
The image shows UKV flow equalisation.
ADDITION
On cold days of the year, when the availability of energy
from the air is lower, the additional heating can com-
pensate 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.
In the principle diagram below, the additional heat is
located after the reversing valve. (Additional heat can
also be connected before the reversing valve.)
COOLING
Cooling (in 2-pipe system)
Cooling and heating are distributed via the same climate
system.
NIBE SMO S40Chapter 4 | Installing the installation16
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