Reefe RPC-15006 Owner's Operation Manual
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5The basic logic on which a High or Low Level Alarm is determined, is set out in the Table below:If there is a Low Level Alarm, then both Pumps will be locked out until the alarm is manually reset. This lockout will onlybe over ridden upon a High Level condition where both the Pump Start and High level inputs are closed.Note that after a High level is triggered, the pumps will both run until the Pump Start and Stop inputs are openedMode C: Standard Configuration plus Prime LossAs per Mode A, except Input 1 is connected to a prime loss/flow switch. If at any stage, after Pump Start, or whilst apump is running, the Prime Loss input opens, for a continuous 2 minute period, a fault is immediately triggered for thatpump and duty alternates. Input functions are as follows:Typical Operation Mode D:• Pressure drops to 400kPa: Lead (for this cycle) Pump cuts in.• Pressure increases and Pump cuts out.• Cycle continues• The controller has inbuilt timers for “Delayed” Start and Stop to obviate pump chatter. Upon Input 1 contactclosure, the pump will not start (delay start) for 1 second and will not stop (minimum run time) for 10 seconds(or 11 seconds from close of Input contacts). This “run on” occurs even if Pressure switch contacts open duringthis initial period. If however run time exceeds 11 seconds, the pump will stop immediately upon “open circuit”occurring.• If the Pressure Switch Input closes circuit as well as the Low Pressure Switch Input, a low pressure timerwill begin counting. If this condition exists for a period of 60 seconds, then both pumps are shut down and thesystem signals a level alarm. This would be typical of a Loss of Prime or Burst Main situation• Pressure switches are normally closed and open on High pressureInput FunctionInput 1 Prime LossInput 2 Pump StopInput 3 Pump StartInput 4 High LevelMode D: Pressure Pumping ConfigurationInput functions are as follows:Input FunctionInput 1 Prime Loss (BRIDGE IF NOT REQUIREDInput 2 Lead Pump Pressure Switch (set at say 350kPa)Input 3 not usedInput 4 Low Pressure Switch (set at say 200kPa)Input 1 Input 2 Input 3 Input 4 PumpState AlarmLow Level Pump Stop Pump Start High LevelClosed Open/Closed Open Open Off -Closed Open/Closed Closed Open On -Closed Open/Closed Closed Closed Both On High Level (after Timeout)Closed Open/Closed Open Closed Both On High Level (after Timeout)Open Open/Closed Open Open Off -Open Open/Closed Closed Open Off Low LevelOpen Open/Closed Open Closed Off Low LevelOpen Open/Closed Closed Closed Both On High Level (after Timeout) |
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