iv
Instruction Manual
Line Depressurization
To reduce the risk of chemical splash during disassembly or maintenance, all installations
should be equipped with line depressurization capability. Using LMI
®
’s Four-Function Valve
(4 FV) is one way to include this feature.
Over Pressure Protection
To ensure safe operation of the pump it is recommended that some type of safety/pressure
relief valve be installed to protect the piping and other system components from failing due to
excessive pressure.
Chemical Concentration
There is a potential for elevated chemical concentration during periods of no flow, for
example, during backwash in the system. Steps, such as turning the pump off, should be
taken during operation or installation to prevent this. See your distributor about other external
control options to help mitigate this risk.
Retightening Components
Plastic materials will typically exhibit creep characteristics when under pressure over a period
of time and to insure a proper fit it may be necessary to retighten the head bolts periodically.
To insure proper operation, we recommend tightening the bolts to 25 inch-pounds after the
first week of operation and on a monthly basis thereafter.
Flow Display
The default flow value as shown on the pump display is accurate at maximum pressure and
100% stroke length. If your operating conditions differ from this, then calibration is necessary
in order to display an accurate measure of the flow.
