sema WPC 11+ - Page 13

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Non Password Protected Parameters:
0.) Password Enter the password here which unlocks the protected parameters (14 to 19) The password is
00004
1.) Minimum Speed The minimum speed of the pump can be adjusted here.
2.) Maximum Speed The maximum speed of the pump can be adjusted here.
3.) Desired Pressure 1 This is the pressure set-point when the input to terminal 3 is OFF
4.) Desired Pressure 2 Tis is the pressure set-point when the input to terminal 3 is ON
5.) Maximum Run Time. This is the me in hours that the pump is permied to run connuously for. If it is ex-
ceeded the pump will be stopped and an error message displayed. Set it to 0 to disable this funcon.
Password Protected Parameters:
Once the password has been entered correctly in Parameter 0 the password protected funcons 14 to 19 become visible.
Some of them require the pump to be stopped before they can be adjusted, if you try to adjust one of these with the pump
running you will be asked to stop it before proceeding
Leaving the parameter menu resets the password.
13.) RIPPLE OVERSHOOT. If the control method is set to Ripple Control in funcon 14 the amount of ripple over-
shoot can be entered here.
14.) Control Method. By default this is set to ‘Ripple Control’ a Sema Ltd., invenon which introduces a small
pressure ripple into the pressure set-point and measures the me that it takes for the pressure to drop to determine is ther is
sucient demand for water for the pump to be kept running. If you would like to operate the pump convenonally (without
the ripple) then change this mode to ‘Convenonal’.
15.) Pressure Averaging. By default the WPC performs a rolling average of mulple readings from the pressure
transducer over a 2 second period to determine the water pressure. This is to make the reading more stable and reduce the
inuence of air bubble sin the water stream. If this is considered undesirable it can be turned o here.
16.) Control Loop Delay. The WPC waits for this length of me aer starng before it tries to control the pres-
sure. This is to give it a few seconds of ‘seling me’ at minimum speed. This me may be adjusted here or even set to 0 if this
is considered desirable.
17.) Lop (Loss of Prime) Current. This is set to the current that the motor draws when the pump is not
pumping (i.e. when it is running dry) If the motor current is at or below this gure for more than 10 seconds the pump will be
stopped and an error message displayed.
18.) Motor Current Adjust the motor current here if necessary to avoid nuisance tripping.
19.) Re-Inialise If the controller is moved to a new pump shed or a new pump is installed on the same controller