Caleffi solar iSolar 3 Kullanıcı Kılavuzu - Sayfa 14
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5.1Various:
Pump is overheated, but no heat transfer from collector
to the tank, feed flow and return flow are equally warm,
possibly also bubble in the tubes
Air in the system?
no
yes
Is the collector circuit
blocked at the dirt trap?
yes
Pump starts up very late and stops working soon.
Switch-on-temperatu-
re difference ∆T
too
on
large?
no
yes
Collector sensor un favour-
able placed (e.g. contact
sensor instead of immersion
sleeve sensor?
yes
14
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Exhaust the system; incre-
ase system pressure to at
least static primary pres-
sure plus 0,5 bar; if neces-
sary continue to increase,
switch the pump on and
off for a short time
Clean the dirt trap
and ∆Toff
Change ∆T
on
accordingly.
If necessary activate tube
collector function.
o.k.
Pump starts for a short moment, switches-on/off
reapeatedly
Is the temperature diffe-
rence at the controller
too small?
no
yes
Wrong placing of the
collector sensor?
no
yes
Plausibility control of the
option tube collector spe-
cial function
The temperature difference between tank and collector
increases enormously during operation; the collector cir-
cuit cannot dissipate the heat.
Collector circuit pump
defect ?
no
yes
Heat exchanger calcified?
no
yes
Heat exchanger plugged?
no
yes
Heat exchanger too
small?
yes
and ∆T
Change ∆T
on
off
accordingly.
no
o.k.
Mount the collector sen-
sor at solar feed flow
(warmest collector out-
put); use the immersion
sleeve of the respective
collector.
Repair / Replace
Decalification
Cleaning
New calculation of the
dimension.