Pulsafeeder PULSAtron Series T7 - Manual (Page 14)

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A flooded suction (tank liquid level always at a higher elevation than the pump) is recommended
when pumping solutions such as sodium hypochlorite (NaOCl), hydrogen peroxide (H2O2), etc.,
which are likely to produce air bubbles. Maintaining a low liquid temperature will also help eliminate
this problem.
Pipe corrosion can result if dilution 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 center
of the flow stream of the line being treated. Trim injector tip as required. See Figure 6. Note:
Extended injection assemblies are available for large water lines. Consult your supplier for more
information.
4.3 Wiring
Risk of electrical shock. This pump is supplied with a three-prong grounding
type power plug. To reduce risk of electric shock, connect only to a properly grounded,
grounding type receptacle.
The metering pump should be wired to an electrical source, which conforms to those on the pump data label. Applying
higher voltage than the pump is rated for will damage the internal circuit.
In the electronic circuit of the control unit, measures for surge voltage are made by means of surge absorbing elements
and high voltage semiconductors. Nevertheless, excessive surge voltage may cause failure in some areas. Therefore,
the receptacle should not be used in common with heavy electrical equipment, which generates high voltage. If this is
unavoidable however, measures should be taken by (a) the installation of a surge-absorbing element (varistor of min.
surge resistance 2000A) to the power supply connection of the pump, or (b) the installation of a noise suppression
transformer.
Signal input to the external pulse signal input terminals ([EXTERNAL], [STOP]) must be a no-voltage signal from relay-
contacts etc. and the input of other signals is prohibited. In the case of relay contacts, 100 ohms or below when ON and
1-meg ohms or above when OFF. The pulse duration of the input signal must be 10 milliseconds or over and the
frequency of the input signal must not exceed 125 times per minute. Signal cord is provided with the pump.
4.4 Well Pump System Installation
Ensure that the metering pump voltage matches the voltage of the well pump. Typical
well pump electrical circuits are shown in Figure 8. All electric wiring should be
installed in accordance to local codes by a licensed electrician.
Install the backpressure/injection (Figure 7) on the discharge side of the metering
pump into a tee which is installed into the water line going to the pressure tank.
Pumps carrying the or "ETL Sanitation" (tested to NSF Standard-50) marks are listed
for swimming pools, spas and hot tubs, and when proper materials are selected, are
capable of handling but not limited to the following chemical solutions:
12% ALUMINUM SULPHATE, 5% SODIUM CARBONATE,
2% CALCIUM HYPOCHLORITE, 10% SODIUM HYDROXIDE,
12.5% SODIUM HYPOCHLORITE, 10% HYDROCHLORIC ACID
Figure 6