Nova-Tech Chem-Tech Series 100-150 - Manual (Page 7)

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5. Install the bypass tubing from the kit into the bypass port of the bleed valve and hand tighten the coupling nut.
Bypass tubing should be connected to return bypassed liquid back to the solution tank.
6. Install the discharge tubing into the discharge port of the bleed valve and hand tightens the coupling nut.
7. Return the system to operating conditions and reconnect the power to the pump.
The pump is now ready for priming and operation. Always use caution and check for leaks at newly assembled
connections.
Air Bleed Operation:
1. While pump is running, turn the bleed valve knob counter clockwise.
2. Run with valve open until a solid stream of fluid comes out of the bypass tubing (.38inch tubing supplied with valve)
3. Close air bleed valve by turning
the bleed valve knob clockwise.
 HAND TIGHTEN FITTINGS:
When connecting tubing to suction and discharge fittings, the coupling nuts should be tightened hand tight only. Excessive
tightening can cause cracks in pump head.
 POINT OF INJECTION:
Pipe corrosion can result if dillution at the injection point does not occur rapidly. This problem is easily prevented by
observing this simple rule: install injection fitting so that the end is in the flow stream of the line being treated. NOTE:
Extended injection assemblies are available for large water lines. Consult your dealer.
 COMMON ERRORS IN THE INJECTION OF CHEMICALS:
Do not insert the injection fitting into a pipe stub in the tee. A full strength solution will often cause corrosion or scale in the
pipe stub when it is not in the flowing stream (Figure J). The maximum lift of the chemical feeder is five feet. Be sure not
to exceed this height. It is very important that the arrow on the fittings and the pump head point vertically upward
in order to prevent backflow. Arrows indicate the proper flow of the chemical.
POWER
The standard chemical feeder is available in115 volt 60 cycle single phase. 230 volt 60 cycle and 230 volt 50 cycle single
phase can also be made available upon request.
Be sure the voltage of the feeder matches the power supply. (Figure M)
Figure M
When working on or around metering pump installation, protective gloves and safety glasses should be worn at
all times.
 PRIMING
All pumps are tested with water (e.g. sulfuric acid, polymer) the pump head should be removed and
dried thoroughly along with the diaphragm and valve seats.
If the discharge line is connected directly to a pressurized system it should be temporarily bypassed during priming of the
pump. This pump is equipped with a bleed valve to simplify this operation by allowing easy bypass of the discharge fluid.