28
OCN
Off
7.5.4 S MX Maximum Cylinder Temperature
Range - 0.5K to 19.5K ~ Default 4.0K
S MX is the maximum temperature the cylinder is allowed to reach.
In the event of the set S MX value being exceeded, further heating of the
cylinder is prohibited by switching R1 Off (solar pump stopped).
will be displayed.
The S MX setting is overridden when, OCX is set to On and/or OREC is
set to On - see 7.5.6 & 7.5.9.
7.5.5 EM Maximum Collector Temperature
Range - 110°C to 200°C ~ Default 140°C
EM is the emergency shut down temperature of the collectors, designed to
prevent damage to the solar components due to overheating.
When a temperature higher than the set EM value is detected by sensor
S1 the solar pump will be switched Off (R1 Off).
will flash on the display.
The pump will restart when the maximum temperature is underrun.
7.5.6 OCX & CMX System Cooling (Collector)
OCX Range - On or Off
~ Default Off
CMX Range - 100°C to 190°
~ Default 120°C
OCX On System Cooling Active
CMX is only available when OCX is set to On.
If the maximum cylinder temperature (S MX) is reached the solar pump is
switched Off (R1 Off). When OCX is set to ON and the collector temperature
rises to the set CMX value the solar pump remains active (R1 On) until the
set CMX value is under run again.
The cylinder temperature may continue to rise above the S MX value up to
95°C, the cylinder emergency shut down temperature.
If the cylinder temperature is higher than the set S MX value and the
collector temperature is cooler than the actual cylinder temperature by at
least 5°C, then the solar pump remains On until the cylinder is cooled down
to below the S MX temperature.
During the system cooling process the
will flash on the display.
The system cooling function enables the solar system to remain active for
longer periods on hot summer days. It also reduces the possibility of the
system PRV valve opening thus preventing loss of heat transfer fluid.
7.5.7 OCN & CMN Minimum Collector Temperature
OCN Range - On or Off
~ Default Off
CMN Range - -10°C to 90°C
~ Default 10°C
CMN is only available when OCN is set to On.
When OCN is set to On the collector temperature has to exceed the set
CMN value before the solar pump will be switched ON (R1 On). This avoids
intermittent switching on of the solar system for low collector temperatures.
When OCN is set to On and the collector temperature is less than the
value set for CMN, will flash in the display.
S MX
4.0°K
OCX
Off
CMX
Only when OCX is On
EM
140°C
120°C
CMN
10.0°C
