31
Pump Protection (System Test)
In some circumstances not all operational stations might be hooked up. For example,
if the controller was capable of running 18 stations but there were only 7 field wires
and solenoid valves available for connection. This situation can pose a risk to a pump
when the system test routine for the controller is initiated.
The system test routine sequences through all available stations on the controller. In
the above example this would mean stations 8 through to 18 would become active
and would cause the pump to operate against a closed head. This could possibly
cause permanent pump, pipe and pressure vessel damage.
It is mandatory if the system test routine is going to be used, that all unused, spare
stations, should be linked together and then looped to the last working station with a
valve on it.
Using the above example, the connector block should be wired as per the diagram
below.
INSTALLATION INSTRUCTIONS
To Next Page
Loading...
