Solar Controller SRK868V6 Installation and Operation Instructions
http://www.keracontrols.com
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IMPORTANT NOTE: Do not set the time period that cross over the 24:00 hrs (12 midnight ). The controller may not
schedule the timing properly.
Note:
•
The Temperature controlled hot water circulation function has higher priority than the Time controlled hot water
circulation function.
•
If the Temperature controlled hot water circulation function is deactivated, then the Time controlled hot water circulation
function is activated automatically.
•
The location of the sensor T4 should be at least 1.5m (5 Ft) away from the tank in order to prevent undesired operation.
3.10 Anti Freeze protection
Note:
this function should only be used in systems that do not use anti-freeze liquid.
A) If this function is enabled, the solar pump control output (P1) will be switched ON when the temperature of the collectors
(T1) falls below the preset ON temperature of the anti-freeze protection.
When the collector temperature T1 rises 5
o
C (9F) higher than the preset ON temperature of the freeze protection, the
controller will turn OFF the solar pump output (P1).
B) If this function is enabled and the tank temperature (T2) falls below +10
o
C (+50F), the heating booster output (H1) will
be switched ON automatically and it will be switched OFF when the water temperature (T2) rises above +15
o
C (59F).
To Enable / Disable this function:
►
Press the “
SET
” button once. The freeze protection temperature
setting will flash.
(The default setting is OFF, display: “-- --“ )
►
Press the “
OK
” button to enable this function.
►
Press “
▲
” “
▼
” button to adjust the switch-ON temperature of the
freeze protection.
Adjustment range: +2
o
C to +10
o
C (+36F to +50F).
After 6 seconds, the controller will lock-in the settings.
►
To disable this function, press the “
OK
” button while the function is enabled. The display will show: “-- --“.
This symbol on the display indicates that the high temperature protection (1) is enabled.
NOTE: In areas where freezing temperatures occur often, we suggest that a solar system with anti-freeze liquid be used
rather than water as the heat exchange medium.
3.11 High temperature protection ( mode 1 )
this mode operates in order to prevent overheating of the water in the tank, the controller checks the temperature of the
tank on T2 sensor. When T2 rises above +95
o
C (+203F), the solar pump (P1) is deactivated. When the temperature T2
drops below +85
o
C (+185F), the system returns to normal operation.
Note: This function default parameters are permanently preset and cannot be altered by the user.
This symbol on the display indicates that the high temperature protection (1) is enabled.
