Pump Solutions Group Neptune Series 7000 dia-PUMP MODELS 7100 thru 7200 - Manual (Page 9)

9
2.0.3 It is recommended that all solution tanks be furnished with a low level cut off switch or low-level
alarm and cut off switch to prevent the pump from running dry. Although the pump can run dry for a
few minuets. OPERATION AGAINST A DRY SYSTEM FOR A PROLONGED PERIOD MAY CAUSE
DAMAGE TO THE PUMP DIAPHRAGM AND REDUCE THE OPERATING LIFE OF THE PUMP.
3.0 DISCHARGE PIPING
3.0.1 It is recommended that the Mechanical Diaphragm metering pump operate against a suitable back
pressure to facilitate better operation of the check valves.
3.0.3 To protect the pump, it is recommended that an external relief valve as manufactured by Neptune
Chemical Pump Company, or equal, be placed in the discharge line of the pump to avoid over pressure.
3.0.4 Discharge piping should equal discharge port size.
NOTE: All parts must have a working pressure rating above the required set pressure.
3.0.5 Start and run the pump.
3.0.6 Adjust the required percentage of flow required.
CAUTION
Do not attempt to run the pump in excess of its nameplate rating.
4.0 INSTALLATION OUTDOORS
The Mechanical Diaphragm metering pump is a totally enclosed pump, which can be used outdoors or
indoors. When installed outdoors, make sure that the pump is protected against extremes of nature as
follows:
4.0.1 Running of the pump when exposed to tropical sunshine with ambient temperature above 90°F
(32°C) would cause excessive oil and motor temperatures. The pump should be shaded and located
in such a way as to permit an ample degree of air circulation.
4.0.2 Under cold conditions, the pump should be insulated and a heater should be supplied in order to
maintain the hydraulic fluid at an ambient temperature above 36°F (2°C.)
5.0 START UP PROCEDURE
The following start up procedure is complete and does repeat instructions on filling the gearbox and pump.
5.0.1 Open suction and discharge valve. (See recommendation 1.0.5)
5.0.2 Set capacity indicator to zero by turning hand knob clockwise.
5.0.3 Adjust backpressure close to zero.
5.0.3 Start pump.
5.0.4
On initial start-ups: Check for proper motor rotation (Refer to Paragraph 1.0.6). Listen for any
abnormal motor or crank noises, and if present, refer to trouble shooting chart.
5.0.5 Adjust pump to required capacity by turning hand knob anticlockwise.
5.0.6 Adjust pressure to requirement.