Cosmo Deltasol BS Montage- Und Bedienungsanleitung Seite 45

4. Troubleshooting
Heat exchanger too
small?
yes
Stores cool down at night.
Does the collector
circuit pump run in the
night?
no yes
At night, the collector
temperature is higher
than the outdoor tem-
perature.
no yes
Sufficient store insula-
tion?
yes no
Insulation close enough
to the store?
yes no
Are the store connec-
tions insulated?
yes no
Warm water flow up-
wards?
no yes
Clean it
Repalce with correctly
sized one
Check controller.
Check the non-return
valve in flow and return
pipe with regard to the
functional efficiency.
Increase insulation.
Replace insulation or
increase it.
Insulate the
connections.
Change connection and
let the water flow side-
wards or through a si-
phon (bow downwards);
less store losses now?
no yes
Does warm water cir-
culation run for a very
long time?
no yes
Circulation pump and
blocking valve should be
switched-off for 1 night;
less store losses?
yes no
Check the non-return
valve in warm water cir-
culation- o.k.
yes no
The gravity circu lation in
the circulation line is too
strong; insert a stronger
valve in non-return valve
or an electric 2-port val-
ve behind the circulation
pump; in pump opera-
tion, the 2-port valve
is open, other wise it is
closed, conect pump
and 2-port valve in par-
allel; activate circulation
again!
45
o.k.
Use the circulation
pump with timer
and switch-off thermo-
stat (energy efficient
circulation)
Check whether the
pumps of the after-
heating circuit runs at
night, check non-return
valve; problem solved?
no
Further pumps which
are connected to the
solar store must also
be che- cked.
Clean or replace