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Apricus Solar Co., Ltd.

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The Apricus Sentinel-Pro Delta-T Solar Controller

Product Group: Others

Product Description
1. Clear LCD display of time, relays, errors and temperatures
2. Constant display of all three sensor temperatures
3. Comprehensive system error reporting
4. 3 Relays: To run pumps, valves and other consumers
5. Daily time control of relays
6. OC and oF temperature display options
7. 110-240V, 50-60Hz compatible
8. Widely adjustable temperature ranges for each of the functions
9. Ability to turn any function OFF
10. Auto recovery with memory of time and settings after power cut
11. Low 3VA power consumption
12. High accuracy NTC thermistors (sensors)
13. Functions and Errors listed on front panel for easy reference
14. Left and right knock-out panels for conduit entry
15. Cable strain relief clamps

FunctionExplanation
F1: Max Tank TempOnce this temp is reached the solar ciruculation pump is turned off to prevent further heating of the tank. Error 1 displayed.
F2: Min Tank TempIf the bottom of the tank drops below this temp error reporting occurs (Error 2).
F3: Delta-T OnThe temp differential required for solar pump operation to occur.
F4: Delta-T OffThe temp differential at which the solar pump turns back off.
F5: Collector StartupThe minimum collector temp before Delta-T operation can begin. Prevents pump circulation when minimal heat potential is present.
F6: Freeze OnThe circulation pump is switched on when the manifold drops below this temp - this is the standard freeze protection method for mildly cold areas.
F7: Freeze OffThe circulation pump is switched off once this temp is reached.
F8: Collector MaxIf this temp is reached Error 6 is displayed. This function should be turned off if function 1 is operational.
F9: Collector MinIf the collector drops below this temperature Error 7 is displayed - indicating that freeze protection has failed (or is incorrectly set).
F10: Boost OnOnce the top of the tank drops below this set temp, power is supplied to the 2nd relay which can active a circulation pump for boosting (eg gas tankless heater)
F11: Boost OffOnce the top of the tank reaches this temp the 2nd relay turns off.
F12: Excess Heat ONIf the top tank temp reaches this level power is supplied to the 3rd relay, allowing heat to be drawn from the tank for other uses (pool, spa, central heating) or for heat dissipation to prevent tank overheating.
F13: Excess Heat OFFOnce the top tank temp drops below this level the power supply to the 3rd relay is stopped.
F14: System ResetDefaults to most common system settings.
F13: Tank Cooling TempIf the bottom of the tank reaches this high temperature the pump will circulate at night to cool the tank down.
F13: Tank Cooling Delta-TThe negative Delta-T value that allows the pump to turn on to cool down the system.
Notes:
- All functions have adjustable temperature ranges.
- Exceeding the upper or lower limit of any function turns it off.
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