
Manual of SR288 intelligent controller
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► Press “SET” or “ESC” to save the setting
► Press “▲”, “SMX 70
o
C” displays on the screen
► Press “SET”, “70
o
C” blinks
► Press “▲/▼”, to adjust the maximum temperature of tank
► Press “SET” or “ESC” to save the setting
► Press “▲”, “SMAX S3” displays on the screen
► Press “SET”, “S3” blinks
► Press “▲/▼”, select the sensor for maximum temperature of tank (S3 for T3, S2 for T2)
► Press “SET” or “ESC” to save the setting
► Press “▲”, “HYST 2K” displays on the screen
► Press “SET”, “2K” blinks
► Press “▲/▼”, to adjust the hysteresis of tank maximum temperature
► Press “SET” or “ESC” to save the setting
7.3 COL Collector function
Function description
OCEM Collector emergency shutdown
When the collector temperature exceeds the adjusted collector emergency temperature,
Then solar pump (R1) switches off in order to protect the system components against
overheating (collector emergency shutdown). If the maximum collector temperature (OCEM)
is exceeded, sign is displayed.
Warning
! Risk of injury! Risk of system damage by pressure surge! If water is used as
the heat transfer fluid in pressurized systems, water will boil at 100 °C. Then do not set the
collector limit temperature higher than 95 °C.
OCCO Collector cooling
The collector cooling function keeps the collector temperature rising within the operating
range by heating the tank. If the tank temperature reaches 95°C the function will be switched
off for safety reasons.
When the tank temperature exceeds the adjusted maximum temperature of tank, then solar
system is switched off. If the collector temperature rises up to its adjusted maximum collector
temperature, the solar pump is switched on again until the collector temperature falls below
the maximum collector temperature. The tank temperature may then exceed its maximum