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Beschikbare talen
Beschikbare talen
Overview
6. Hydraulic connection
The use of a circulation loop should be restrained. Such an installation may disturbs the stratification
inside the tank. This triggers more working cycles for the heat pump and the potential use of the
electric backup heater.
Cold water inlet is marked with a blue collar and the hot water outlet has a red collar. Both have a thread gas
dia. 20/27 (3/4").
For regions with a lot of scale (Th>20°f), we recommend to treat the water. The hardness after softener has to
be higher than 8°f. The use of a softener does not influence the warranty if the softener is approved for the
country of installation and set to the rules of art, with regular checking and maintenance.
Local criteria of drinking water quality have to be respected.
6.1. Cold water connection
Before connection check that the piping is clean without any particles from installation.
The installation has to include a new safety valve set to 7 bar ( 0,7 Mpa ), compliant to EN 1487 and
connected directly on the cold water inlet.
No hydraulic device (stop valve, pressure reduction, flexible...) is allowed between the safety valve
and the cold water inlet of the water heater.
As water can flow from the safety valve the drain
should be kept in open air. In any type of installation
there should be a cold water stop valve, before the
safety valve.
The overflow of the safety valve has to be connected
to the used water evacuation through a siphon.
Installation has to be in a frost-free environment. The
safety valve has to be operated regularly to check the
working condition (1 - 2 times per month).
The installation should be equipped with a pressure
reduction if the main water supply pressure is higher
than 5 bar (0,5 MPa). The pressure reducing device
has to be installed at the beginning of the distribution
network (before the safety valve). We recommend a
supply pressure of 3 - 4 bar (0,3 to 0,4 MPa.
Safety valve
Cold water
inlet
Siphon
J OK
Installation
Operation
Maintenance
Pressure reduction
Warranty
L KO
Water supply
J OK
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