Dover PSG Neptune, Установка, эксплуатация и обслуживание

Страница: 14 / 34

9
START-UP
1. Apply power to the unit by turning the switch at the top right of the unit to “LOCAL”. The red “ON”
light should come on. Since water has not yet been turned on, expect the amber “FAULT” light to
illuminate immediately. This is normal when there is no water flow. The system requires a minimum
of 25 psid differential pressure to sustain the Run mode otherwise the amber “FAULT” light will come
on.
2. Allow water to flow into the system. Turn the water flow to maximum. Water flow is controlled by the
control knob at the bottom of the flowmeter. All units include a solenoid valve (normally closed) which
will not allow water to flow until the system is turned on.
3. Check for water leaks at all connections within and attached to the system. Tighten the
connections, if necessary.
4. Prime the polymer feed pump until polymer is drawn to the pump outlet or bleed port using the priming
kit hand pump furnished with the unit. Continue the water flow at maximum while priming and
starting up the polymer feed pump.
(Priming process may vary slightly, see pump manufacturer’s recommended procedure). For
installations that are especially difficult to prime, a hand operated vacuum pump has been included to
assist the polymer feed pump in initially pulling in the polymer.
5. Turn the polymer pump to the desired setting. ADJUST PUMP ONLY WHEN THE PUMP IS
RUNNING. RECOMMENDED OPERATION IS TO SELECT THE CONVENIENT STROKE
LENGTH SETTING AND MAKE ALL FURTHER ADJUSTMENTS, EITHER AUTOMATIC OR
MANUAL, BY SPEED CONTROL.
6. Now lower the water flow to the desired level. At no time do you wish to create a situation
where there is too much polymer and too little water or gelling can occur.
7. Check for polymer leaks at all connections within and attached to the system. Check of air leaks
in the pump suction piping. Tighten the connections, if necessary.
8. The system is now fully operational. Initial settings for desired dilution water and polymer flow rates
have been made. Proceed to fine tune, depending upon the amount of polymer and desired dilution
required and the performance of your process.
NOTE: The system must be calibrated to assure accurate polymer flow rates with the specific
polymer and polymer feed setup used. Calibration instructions begin on page 11.
.