Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 5)

5
PRECAUTIONS
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 overpumping 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.
Fuse (all models) and Battery (AD9 only)
Caution, Battery may explode if mistreated. Do not recharge, disassemble or dispose of in fire.
The battery and fuse are internal, factory serviceable parts, and must be replaced by the factory
or a qualified distributor with parts of the same type and rating.
Flooding
WARNING: Install this pump in a location where flooding cannot occur.
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 op-
eration 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.