Milton Roy Roytronic A Series Instruction Manual page 5

Plumbing
Always adhere to your local plumbing codes and requirements. Be sure installation does
not constitute a cross connection. Check local plumbing codes for guidelines. LMI is not
responsible for improper installations.
Back Pressure/Anti-Syphon Valve
If you are pumping downhill or into low or no system pressure, a back pressure/anti-
syphon device such as LMI's Four-Function Valve should be installed to prevent over-
pumping or syphoning. Contact your LMI distributor for furthur information.
Electrical Connections
WARNING: To reduce the risk of electrical shock, the metering pump must be plugged
into a properly grounded grounding-type receptacle with ratings conforming to the data
on the pump control panel. The pump must be connected to a good ground. Do not use
adapters! All wiring must conform to local electrical codes. If the supply cord is damaged,
it must be replaced by the manufacturer, stocking distributor, or authorized repair center
in order to avoid a hazard.
Ground Fault Circuit Interrupter
WARNING: To reduce the risk of electric shock, install only on a circuit protected by a
Ground Fault Circuit Interrupter (GFCI).
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.
PRECAUTIONS
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