Roth BW/H Komfort, Installation Manual

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BW/H Komfort
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DVGW:
The DVGW-function controls if the temperature at the gi-
ven sensor (Sen-DVGW) exceeds a temperature of 60 °C.
If 60 °C are not reached up to DVGW start time, this func-
tion is activated in order to activate e.g. an after-heating.
The function is switched-off when 60 °C are reached at the
relevant sensor or at midnight (reset).
If the relevant sensor does not work, this function is sus-
pended.
CS-Bypass: f the irradiation exceeds the adjusted value CS-bypass, so
that the collector circuit is operated.
It is switched-off if the irradiation falls 2 minutes below the
value CS-bypass.
The collector circuit is operated with minimum pump
speed.
CS-Bypass:
Adjustment range 100 ... 500 W/m
2
Factory setting 200 W/m
2
2-collector systems:
If a loading of the stores is effected in these systems, the
function is switched-off.
Recooling:
This function is used for keeping the system temperatures
and consequently the thermal load as low as possible.
If all stores of a system have exceeded the maximum tem-
perature, the loading circuit for 1st store is again operated
in order to reduce the surplus energy from tubes and
collector.
This „circulation“ is again switched-off if the maximum store
temperature is underrun by 2 K.
2-collector systems: Both collector circuits are activated in a 2-collector sys-
tem.
Combined with collector cooling function:
If the option „collector cooling“ is activated in addition to
the recooling function, the response action of the recoo-
ling function changes. The objective is now to dissipate the
energy supplied by the collector cooling.
If the temperature at the collector decreases by 5 K below
that of the store, the recooling function is activated and the
loading circuit is again operated (for cooling of the store).
If the difference between collector and store decreases
below 3 K during that cooling period, the function is swit-
ched-off.
2-collector systems: In a 2-collector system, the collectors are separately opera-
ted due to the above-desribed switch-on conditions.
Activating: Tst
≥
Tstmax
Hysteresis 2 K
Activation: (Tst-Tcol)
≥
5 K
Deactivation: (Tst-Tcol) < 3 K
B