Craftsman 390.2511 Manuel du propriétaire télécharger pdf (Page 6)

INSTALLATION

NOTICE: Use Teflon tape supplied with the pump or Ptasto-

Joint Stikl for making all pipe-thread connections to the

pump itself. To avoid stress-cracking, do not use pipe joint

compounds on the pump.

1. Wrap male pipe threads being attached to pump with one

or two layers of Teflon tape. Cover entire threaded por-

tion of pipe.

2. Do not overtighten threaded fittings in the plastic pump.

Be sure you do not try to tighten joint past thread stop in

pump port!

3. ff leaks occur, remove fittings, clean off old tape, rewrap

with one to two layers of tape and remake the connec-

tion. If joint still leaks, replace the fittings (fittings may be

undersized).

4. Be sure to support all piping connected to the System.

MAJOR COMPONENTS AND WHAT

THEY DO

Tank and Air Volume Control

The tank serves two functions. It provides a reservoir of

water, some of which can be drawn through the house fix-

tttre before the pump must start, and it maintains a cushion

of air under pressure.

When Captive Air* Tanks are used, no air volume control is

necessary. This tank contains a permanent pre-charge of air_

When a Standard Tank is used, an air volume control adds

air to the tank when it is needed. See instructions included

with Air Volume Control for details on installation and op-

eration.

Pressure Switch

The pressure switch provides for automatic operation.

MODEL NO. PUMP STARTS AT PUMP STOPS AT

390.2511 30 Pounds 50 Pounds

Impeller, Jet and Pressure Regulator

The impeller of the pump rotates with the motor shaft, cans-

ing the water to fly out from its rim by centrifugal force. The

rotation of the impeller creates a vacuum which "pulis" in

more water. Part of the water is diverted back to the jet

where it again passes through the nozzle and venturi - cre-

ating additional vacuum to draw in more water and deliver-

ing it at high pressure to the impeller.

In a deep well installation, the jet assembly is submerged

in the well because the vertical distance to the water level

exceeds the suction lift of the pump.

Adjustment of the pressure regulator causes the right

amount of water to be diverted back to the jet for the most

efficient operation.

_Lake Chemical Co., Chicago, Illinois

In a shallow well installation, the jet assembly is attached

directly to the pump because the vacuum created will pull

water to the pump.

The pressure regulator may be used to restrict the flow of

water in a shallow well system if the SEARS convertible

pump produces more water than the well can produce.

DEEP WELL PUMP INSTALLATION

(Figures I & 2, Page 4)

In a deep well installation, the jet assembly is submerged in

the well because the vertical distance to the water level ex-

ceeds the suction lift of the pump. A single pipe system must

be used in 2" and 3" wells. A double pipe system must be

used in 4" or larger wells.

Follow instructions packed with jet package for proper noz-

zle and venturi combination for your pumping depth.

DOUBLE PIPE JET

When a double pipe jet is selected, 2 pipes are used in the

well. One is the suction pipe, and the other, the pressure

pipe. Plastic pipe is ideal for double pipe installations, due

to its light weight and easy installation.

Use 100 pound flexible plastic pipe on horizontal jet pumps.

TO INSTALL 4" DOUBLE PIPE JET

First, inspect jet to make sure no foreign matter has entered

the openings.

Be certain no foreign matter enters pipe openings while in-

stalling the unit.

Plastic Pipe Installations

1. Attach a foot valve (not furnished) to the jet with a short

nipple.

2. Before installing, be certain foot valve operates freely.

3. A special plastic pipe adapter is included with the jet

which screws into the 1-1/4" suction tapping over the

venturi.

4. Assemble a plastic pipe adapter (not furnished) into 1"

tapping in the jet body.

5. Use sufficient length of plastic pipe to place the jet 10-15

feet below the lowest drawdown water level. This is the

level to which the water in the well will drop while being

pumped continuously.

6. Tighten all hose clamps securely. A sanitary weli seal is re-

quired on top of the well casing. Use steel nipples and el-

bows or specialized galvanized steel elbows to go through

the well seat. Use plastic pipe adapters where special el-

bows are not used.

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Craftsman 390.2511 Manuel du propriétaire Page 6

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