Roth BW/H Komfort HE, Руководство для специализированного ремесленника

Страница: 41 / 80

41
en
Heat dump
Solar / opt. functions / Add new function / Heat dump
Adjustment
channel
Description
Adjustment range /
selection
Factory setting
Relay Relay selection system dependent system dependent
Variant Variant (pump or valve logic) Valve, Pump Valve
Tcol. Collector overtemperature 40 … 190 °C 110 °C
Funct. Activation / Deactivation Activated, Deactivated Activated
Variant pump Variant valve
Relay
Relay
The Heat dump function can be used to direct excess heat generated by strong
solar irradiation to an external heat exchanger (e. g. fan coil) in order to keep the
collector temperature within the operating range.
Whether the heat dump is activated via an additional pump or a valve can be ad-
justed in the menu item Variant.
Variant pump:
The allocated relay is energised with 100 %, if the collector temperature reaches
the adjusted switch-on temperature.
If the collector temperature falls by 5 K below the adjusted collector overtemper-
ature, the relay will be switched off. In the variant pump, the heat dump function
works independent from solar loading.
Variant valve:
The allocated relay will be energised in parallel to the solar pump, if the collector
temperature reaches the adjusted collector overtemperature. If the collector tem-
perature falls by 5 K below the adjusted collector overtemperature, the relay will
be switched off.
If one of the store temperatures exceeds its store maximum temperature by more
than 5 K while the heat dump function is active, the function will be deactivat-
ed and an error message will appear. If the temperature falls below this value
by the hysteresis maximum store temperature (HysSt in the Solar / Basic
settings / Store menu), the heat dump function is released again.
Note:
The switch-on collector temperature must be adjusted at least by 10 K
lower than the emergency switch-off temperature.