Roth BW/H Komfort, Installation Manual

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BW/H Komfort
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Pump starts for a short moment, switches-off, switches-on
again, etc. („controller jitting“)
Too little temperature
difference at the cont-
roller?
no yes
Wrong mounting of
collector sensors?
yes
Change
∆
Ton and
∆
Toff
accordingly.
Mount the collector sen-
sor at solar feed flow
(warmest collector out-
put); use immersion sleeve
of the respective collec-
tor.
Pump starts up very late and stops working soon. The temperature diffrence between store and collector
increases enormously during operation; the collector
circuit cannot dissipate the heat.
Collector circuit pump
defect ?
no yes
Heat exchanger calcified?
yes
Control / replacement
Decalification
no
Heat exchanger plugged?
yes no
Cleaning
Heat exchanger too
small?
yes
New calculation of the
dimension.
no
Plausibility control of
the option tube collec-
tor special function
Change
∆
Ton and
∆
Toff
accordingly.
o.k.
Too little temperature
difference at the cont-
roller?
no yes
Plausibility control of ma-
ximum store temperature
Tstmax and security switch-
off of the store.
o.k. no
no
Pump is overheated, but no heat transfer from collector
to the store, feed flow and return flow are the same warm;
perhaps also bubble in the lines.
Exhaust the system; incre-
ase the system pressure
to at least static primary
pressure plus 0,5 bar; if
necessary continue to
increase pressure; switch
the pump for a short time
off and on.
Air in the system?
no yes
Is the collector circuit
plugged at the dirt trap?
yes
Clean the dirt trap.
4. Various:
B