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738.955 | 10.40
EN
at regular intervals to transmit the actual heat from
the collector pipe to the sensor (T1). If the tube collec-
tor function is activated, the controller automatically
switches the pump on every 30 minutes for 30 sec-
onds. The following displayappears:
The bottom temperature sensor, T1, is shown
7.5 Anti-freeze func
tion
If the anti-freeze function is activated, the controller
switches the pump on as soon as the collector tem-
pera
ture T1 falls below +5 °C. The heat transfer fluid
is then pumped through the collector to prevent the
system from freezing. If the collector reaches a tem-
perature of +7 °C, the pump is switched off again.
CAUTION
System can freeze despite the activated anti-freeze
function!
During a power outage, the anti-freeze function does
not operate.
During long-term periods of frost (due to restricted
water tank heat storage).
If collectors are mounted in locations exposed to
wind.
It is recommended to generally use heat transfer fluid
with anti-freeze for solar energy systems.
Standard anti-freeze heat transfer fluids for solar
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