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REGULUS SRS6 EP Controller - www.regulus.eu
Caution
Protective functions
menu 5
5.3 - Recooling
menu 5.3
At the end of a sunny day the temperature in a storage tank may easily reach high values. In order to prevent
further temperature increase the next day, excess energy can be released into the air via collectors under cloudy
conditions or after sunset.
If the temperature in the storage tank exceeds the value
„Recool Tsetpoint”
and the collector is at least by 20
°C cooler than the storage tank, the solar pump starts. The storage tank is then cooled down until the
„Recool
Tsetpoint”
is reached. In systems with two storage tanks the setting applies to both the storage tanks.
Settings range: Recooling: ON, OFF / Default setting: OFF
Settings range: Tnast. pro no
č
.vychl.: 0 °C to 99 °C / Default setting: 70 °C
This function enables to release excess heat from the storage tank considerately and without
solar
fl
uid overheating, via piping and collectors into the ambient air. It is recommended to keep
activated.
5.4 - Frost protection
menu 5.4
A two-stage frost protection function is available. In stage 1 the controller switches the pump on for 1 minute
every hour if the collector temperature drops below the set value
„Frost stage 1”
. If the collector temperature
drops further to the set value
„Frost stage 2”
, the controller switches the pump on continuously. If the collector
temperature then exceeds the value
„Frost stage 2”
by 2 °C, then the pump switches off again.
Settings range: Frost protection: on/off. / Default setting: off
Settings range: Frost stage 1: -25 to 10 °C or off / Default setting: 7 °C
Settings range: Frost stage 2: -25 to 8 °C or off / Default setting: 5 °C
This function causes energy loss via the collector!
As Regulus solar thermal systems are
fi
lled with antifreeze
fl
uid, the antifreeze protection shall re-
main off.
5.5 - Seizing protection
menu 5.5
Protection against pump seizing by regular short running of a pump or a valve. Seizing may occur after longer
inactivity of valves or pumps. If the seizing protection is activated, the controller switches the relay in question
and the connected consumer on every day at 12:00 or weekly on Sundays at 12:00 (setting “weekly”) for 5 se-
conds in order to prevent the pump and/or the valve from sticking after an extended stationary period.
Settings range: R1: daily, weekly, off / Default setting: daily
Settings range: R2: daily, weekly, off / Default setting: daily
5.6 - Collector alarm
menu 6.5
If this temperature is exceeded at the collector sensor when the solar pump is on, a warning is triggered. A red
LED starts
fl
ashing and a warning message is shown in the display.
Settings range: Collector alarm OFF, ON /Default setting: OFF
Settings range: Collector Tmax 60 °C to 299 °C / Default setting: 115 °C
Settings range: Delay 1 - 60 min / Default setting: 1 min
Caution
