Craftsman 390.253251 Manuel du propriétaire télécharger pdf (Page 11)

OPERATION I MAINTENANCE

There are conditions of deep well operation when

the regulator valve may be completely open with-

out any faltering of pressure. In this case, operate

pump with regulator valve open.

HELPFUL HINTS I MAINTENANCE

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 17). Since the gases rise in the well

casing, the water sucked down through the pipe and

into the suction pump 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 p__ti_ocitrol in the op-

eration of your standard tank system. In such cases, a

pre-charged tank (which needs no air control) is

recommended.

Using the Compound Gauge

If the pump or system seems to be operating ineffi-

ciently, the compound gauge can sometimes help de-

termine the problem.

A compound gauge is a combination vacuum and pres-

sure gauge which will indicate (1) receding water level

in the well, (2) leakage in the suction line or in the

pump, or (3) clogged impeller.

To use, install the gauge in the air volume control (AVC)

port in the base of the pump. Open all shutoff valves

between pump and household piping. Tighten regula-

tor screw as far as possible. After running pump a few

minutes to eliminate all air from pipes, loosen regula-

tor screw until compound gauge shows 15" of vacuum.

This setting indicates that the pressure regulator is set

for delivery of the highest volume of water possible.

Let the pump run a few minutes; if the water level in

the well is falling, the vacuum will increase. If neces-

sary, reduce the regulator setting to bring the vacuum

reading back to 15". If the pump does not develop 15"

of vacuum according the gauge, you may have air leaks

in the suction line or a clogged impeller.

Cleaning the Deep Well Jet

1. Disconnect power.

2. Disconnect piping and well seal or casing adapter.

3. Withdraw jet assembly from the well.

4. Unscrew and remove the venturi. Remove the noz-

zle with a socket wrench and clean.

5. Replace all parts, reprime, and turn on power.

Figure 16A - Open Regulator Valve

Gases

rise to

sudace

Figure 16B - Watch for Pressure Gauge to Flutter

wireto hold

pipesleeve

pipe

valve

sleeve

Figure 16C - Close Regulator Valve until

Pressure Stabilizes

cap

Figure 17 - Gas/Air Control in Well

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 19 20

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Craftsman 390.253251 Manuel du propriétaire Page 11

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