Matelec FPC-15007, Owner'S Operation Manual

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5
The 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 only
be 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 opened
Mode C: Standard Configuration plus Prime Loss
As per Mode A, except Input 1 is connected to a prime loss/flow switch. If at any stage, after Pump Start, or whilst a
pump is running, the Prime Loss input opens, for a continuous 2 minute period, a fault is immediately triggered for that
pump 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 contact
closure, 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 during
this 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 timer
will begin counting. If this condition exists for a period of 60 seconds, then both pumps are shut down and the
system 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 pressure
Input Function
Input 1 Prime Loss
Input 2 Pump Stop
Input 3 Pump Start
Input 4 High Level
Mode D: Pressure Pumping Configuration
Input functions are as follows:
Input Function
Input 1 Prime Loss (BRIDGE IF NOT REQUIRED
Input 2 Lead Pump Pressure Switch (set at say 350kPa)
Input 3 not used
Input 4 Low Pressure Switch (set at say 200kPa)
Input 1 Input 2 Input 3 Input 4
Pump
State
Alarm
Low Level Pump Stop Pump Start High Level
Closed 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 Level
Open Open/Closed Open Closed Off Low Level
Open Open/Closed Closed Closed Both On High Level (after Timeout)