© RESOL 11089 deltasol_c2.monen.ind
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D e lt a S o l
®
C2
Stores are cooled during the night.
Does collector circuit
pump run during the
night?
no
yes
Check the controller
functions
Collector temperature is
at night higher than ambi-
ent temperature.
no
yes
Check the return flow
preventer in feed flow and
return flow with regard to
the functional efficiency.
Is store insulation suffi-
cient?
yes
no
Intensify the insulation.
Is store insulation close
enough to the store?
yes
no
Replace or intensify the
insulation.
Are the store connec-
tions insulated?
yes
no
Insulate connections.
Warm water outflow
upwards?
no
yes
Change connection and
let the water flow side-
wards or through a siphon
(bow downwards); less
store losses now?
Does warm water circu-
lation run for a very long
time?
no
yes
Use the circulation pump
with timer and switch-off
thermostat (energy effici-
ent circulation)
The solar circuit pump does not work although the collec-
tor is obviously warmer than the store.
Does the pump start up
in manual operation?
yes
The adjusted tempe rature
difference for starting the
pump is too high; choose
an matching setting
no
Is the current of the
pump released by the
controller?
yes
Is the pump stuck?
Turn the pump shaft using
a screwdriver; is it passa-
ble now ?
Is the pump defective -
replace it.
Are the fuses of the
controller o.k.?
Controller might be de-
fective - replace it.
no
yes
no
no
yes
Replace the fuses.
Switch-off the circulation
pump and the blocking
valve for 1 night; less store
losses?
yes
no
Check the pumps of the
after-heating circuit accor-
ding to nightly run and de-
fect return flow preventer;
problem solved?
no
no
yes
o.k.
Control the return flow
preventer in warm water
circulation- o.k.
yes
no
Please also check further
pumps which are con-
nected to the solar store.
The gravitation circu lation
in the circulation line is
too strong; insert a stron-
ger return flow pre venter
or an electrical 2-way val-
ve behind the circulation
pump; the 2-way valve is
open in pump operati-
on, other wise it is closed,
conect pump and 2-way
Cleaning or replacement.
valve in parallel; activate
the circulation again!
a
a
b
b
