STIEBEL ELTRON SOM 8 PLUS - Page 79

79
Does the warm water circulation
run for a very long time?
no yes
Use the circulation pump with
timer and switch-o thermostat
(energy ecient circulation).
Circulation pump and blocking
valve should be switched-o for
1 night; less store losses?
yes no
Check whether the pumps of the
afterheating circuit run at night;
check whether the non-return val-
ve is defective; problem solved?
no
yes no
a
The gravitation circulation
in the circulation line is too
strong; insert a stronger valve
in the non-return valve or an
electrical 2-port valve behind
the circulation pump; the
2-port valve is open when the
pump is activated, otherwise
it is closed; connect pump and
2-port valve electrically in pa-
rallel; activate the circulation
again. Deactivate pump speed
control!
Clean or replace it.
Further pumps which are connec-
ted to the solar store must also be
checked.
Check the non-return valve in
warm water circulation - o.k.
295931-36390-8667 SOM 8 plus_en.indb 79 20.10.2011 13:14:59