Hydrotech MP Series PULSAtron - Manual (Page 18)

18
POWER
All metering pumps are available in 115 volts at 50/60 Hertz, single phase. Optionally 230 volts at 50/60 Hertz, single
phase can be provided.
Prior to start-up always check to insure that the pump voltage/frequency/phase
matches that of the power supply.
: If pump is fitted with a PVC pumphead (7th position of model number is “V”. Note: PVC
is gray, not black), uniformly hand tighten the four head screws before use (18-22 inch
pounds / 3.21-3.93 kg/cm). Periodically tighten after installation.
PRIMING
: When working on or around a chemical metering pump installation, protective clothing and
gloves and safety glasses should be worn at all times.
All pumps are tested with water. If the chemical to be pumped reacts when mixed with water
(e.g. sulfuric acid, polymer) the pump head should be removed and dried thoroughly along
with the diaphragm and valve seats.
1. Turn on the power to the pump. Operate the pump in the fixed rate control mode at 100% (full) rate. The green
LED will light up and flash off each time the pump strokes.
2. Adjust the stroke length knob to the 100% setting mark (for more information see “Stroke Length Adjustment”
on the following page).
3. If the discharge line is connected directly to a pressurized system it should be temporarily bypassed during
priming of the pump. A bleed valve will simplify this operation by allowing easy bypass of the discharge fluid.
All air must be purged from the pumphead before the pump will pump against pressure.
Air Bleed Operation:
A) While pump is running, turn adjustment screw counter-
clockwise.
B) Run with valve open until a solid stream of fluid comes
out of the bypass tubing (1/4 x 3/8 supplied with valve),
no air bubbles.
C) Close air bleed valve by turning adjustment screw
clockwise.
4. Chemical should reach the pumphead after a few minutes
of operation. If not, remove the discharge fitting and
moisten the discharge valve area (ball check and valve
seats) with a few drops of chemical being fed to the
metering pump.
For safety, always use protective
clothing and gloves, wear safety glasses and use a
proper container to hold the chemical.
5. If the pump continues to refuse to prime, refer to Troubleshooting Section of these instructions.