Manual LogoMatic G2
30
4.9 Domestic water circulation with pump and BP
The domestic water circulation system is used to provide a constant supply of hot water to the taps.
Long periods of disuse should be avoided!
Please ensure that you comply with the relevant technical regulations and guidelines.
Note:
The domestic water circulation is set to the "Cycle" operating mode in the factory.
The domestic water circulation may only be put into operation once the station has been filled with
domestic water (voltage supply 230 V). Otherwise the circulation function or connector must be
taken out of operation in order to prevent the risk of it running dry.
A DN15 plug-in backflow preventer (RV)
is installed on the pressurised side of the
circulation pump on the domestic water side
in order to prevent unwanted circulation.
The domestic water circulation pump (Wilo-Star
Z Nova) is suitable for use in hard water grades
of up to 20°dH.
Please refer to the electrical wiring diagram
for the electrical installation.
The LogoTronic HIU controller must be
permanently connected to the power supply
when the system is filled
to counteract interference!
Note:
The safety fuse of the sanitary installation in a dwelling with a domestic water circulation connection
must comply with DIN 1988, i.e. with a safety valve and, if necessary, an expansion vessel.
HW
HW
inlet
CW
outlet
BP
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