Menu sequence and structure •
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3110086 EHC20 UK 110515
4.3 Priority S(X)
Priority of the storage tank X
This setting specifies the filling order. If an equal priority is set, the storage tanks will be filled on an equal basis.
Setting range: 1-4
4.4 T priority
Temperature threshold for absolute priority during primary filling
In multiple storage tank systems, the filling of a lower-ranking storage tank will not commence until the temperature
setpoint at the sensor for the higher-ranking storage tank is exceeded.
Setting range: 0°C to 90°C / default: 40°C
4.5 Filling time
Interrupting the filling of a lower-ranking storage tank
When a lower-ranking storage tank is being filled, a check to determine whether the collector has reached a
temperature level which would allow the higher-ranking storage tank to be filled is carried out after the period of time
set here. If this is the case, the higher-ranking storage tank will be filled again.
If this is not possible, the temperature rise will be measured (see ”4.6 Temperature rise”) in order to check whether the
collector will shortly allow the higher-ranking storage tank to be filled.
Setting range: 1 to 90 minutes / default: 20 minutes
4.6 Temperature rise
Extending the filling delay owing to temperature rise
In order to set the exact filling priorities for systems with multiple storage tanks, the minimum temperature rise at the
collector (measured over a minute) which is needed in order for the delay in filling the lower-ranking storage tank to be
extended by a minute is set. The delay is extended because the temperature rise at the collector will presumably soon
allow the higher-ranking storage tank to be filled. The filling of the primary storage tank will begin as soon as ∆T switch-
on conditions are met. If, however, the temperature rise undershoots the set value, the filling of the lower-ranking
storage tank will once again be enabled.
Setting range: 1°C to 10°C / default: 3°C
5. Protective functions
In the ”5. Protective functions” menu, you can enable and configure various
protective functions.
Under no circumstances are these settings designed as a
substitute for the customer’s own safety provisions.
You can exit the menu by pressing ”esc” or selecting ”Exit protective
functions”.
5.1 Anti-seize protection
If anti-seize protection is enabled, the controller will switch on the relevant relay and the connected load for 5 seconds
every day at 12 o’ clock or every Sunday at 12 o’ clock in order to prevent the pump or the valve seizing as a result of
extended standstill periods.
R1 setting range: daily, weekly, off / default: Off
R2 setting range: daily, weekly, off / default: Off
