aermotor VNA2 Serie Manual Del Usuario página 11

Operation
4 0 6 0
2 0
8 0
1 0 0
Figure 14A: Open Regulator Valve
4 0 6 0
2 0
8 0
1 0 0
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Figure 14B: Watch for Pressure Gauge
to Flutter
6 0
4 0
2 0
8 0
1 0 0
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Figure 14C: Close Regulator Valve
until Pressure Stabilizes
Gases
rise to
surface
Ejector
Pipe strap or
wire to hold
pipe sleeve
Tail
pipe
Foot
valve
Pipe
sleeve
Pipe
cap
Figure 15: Gas/Air Control in Well
Step 4. Once unit has primed and pressure stabilized, slowly open (turn
counterclockwise - Figure 14A) regulator valve until pressure fal-
ters (pressure gauge needle flutters; pump may become noisy - see
Figure 14B). At this point, close (turn clockwise) regulator valve
slightly until pressure stabilizes. This setting provides maximum
flow (Figure 14C).
Step 5. Pump may draw well down far enough at this point to lose its
prime. If so, close regulator valve until pressure is stable throughout
pumping cycle. Close faucets and allow pump to pressurize tank
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and shut off.
Step 6. Check system by alternately opening and closing faucets in the sys-
tem. With faucets open , pressure will drop until pump starts; with
faucets closed, pressure will build up until pump shuts off.
Step 7. There are conditions of deep well operation when the regulator
valve may be completely open without any faltering of pressure. In
this case, operate pump with regulator valve open.
HOW TO HANDLE A GASEOUS WELL
In some areas well water contains gases which must be allowed to escape
before the water is used. To deliver gas-free water suspend a pipe, closed
at the bottom and open at the top, so that it surrounds the suction pipe
inlet. (See Figure 15). Since the gases rise in the well casing, the water
sucked down through the pipe and into the pump suction is free of gas.
This type of well must be vented to the outside of any enclosure.
AIR CONTROL IN FLOWING WELLS
Flowing wells or wells with little or no drawdown, could create a special
problem in air control in the operation of your standard tank system.
In such cases, a pre-charged tank (which needs no air control) is
recom mended.
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