Water Level Controller DWLC-777 & Pre-wired sensor kits
Main Tank Control:
This feature maintains water levels between overflow and reserve. This function is done by stopping the motor just below the overflow pipe and switching back on below the reserve.
Allows pumping when the water reaches an adequate level or on elapsed idle timeout (30minutes), acts according to the priority. Users depending on public water supply can benefit this feature by setting up the level and end sleepless waiting and forget about the supply timings. Open-well users can benefit this function by setting the adequate level sensor probe just below the maximum water level in dry seasons.
Stops the pump just above the foot-valve; this way the air won't enter inside the suction pipe. This function avoids the hassle of removing air from the suction pipe 100%.
LED lights show different modes of operations and diagnostic indicators. Automatic or Manual On/Off switch Micro-computer based sensing algorithm prevents corrosion of copper sensor probes, so heavy-duty stainless probes are not required. Compact and Elegant ABS plastic enclosure will not deteriorate the beauty of the space installed.
Run-Timer & Idle Timer:
This feature in DWLC-777 prevents overheating of the motor by switching it off after a 15-minute continuous run. Then the unit stays idle for 30 minutes, allows cooling down of pump & motor. After the fixed idle timeout the idle timer will resume pumping.
Dry-run Detection & Water delivery detection:
Dry running of pump for a long period may cause damage to the impellers and water seals. DWLC-777 prevents this by switching the motor off within 8 seconds of dry run detection. The time for water to reach the main tank varies according to the length of the delivery pipe. The detection time of water being pumped is automatically adjusted (15,30,60,90,120 &180 seconds )by DWLC-777 according to the previous attempt. A failed attempt will stop the motor and stays halted for the auto-adjusted duration (5,10,15,30,60,90,120,180 & 240 minutes) and then attempted for another 15 more times before successful pumping. A successful attempt stores the timeout values until a power failure. After the final attempt, DWLC-777 will turn itself to the manual operation mode. User intervention is required further.
Sump low detection without using sensors:
If water is delivered at least for 10 seconds, DWLC-777adjusts the dry-run timeout to 8 seconds. Then next dry-run is interpreted as low water level in the sump. The motor stops and initiates idle timer for 30 minutes and idle timer then restarts pumping. This feature is useful with submersible pumps where sump wiring is complicated. See wiring guide to bypass sump controls using sensors. This method cannot be used with surface-mounted monoblock pumps as the removal of air trapped inside the suction pipe requires user intervention.