Sears 390.252158 owner manual 41-1/22 Up to 25 Ft To 50 Ft To 200 Ft Discharge Pipe Sizes, 14/14

INSTALLATION

1-1/4"1-1/2"2"

Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft.

Discharge Pipe Sizes

When the pump is some distance from the house or point of water use, the discharge pipe size should be increased to

reduce pressure losses caused by friction.

1"	1-114"	1-1/2"
Up to 25 Ft.	25 to 100 Ft.	100 to 800 Ft.

quired on new installations, pumps requiring repriming and

pumps that have been disassembled for service. Do this as fonows:

1.Open faucets furthest from tank and allow pump to op- erate.

2.Air in the system will cause a sputtering flow; allow faucets to run until you have a steady, air free stream.

3.Open and close faucets repeatedly until you are sure all air has been removed.

4.If stream does not become steady, air may be leaking into the system; check for leaks in the piping on the suction side of the pump.

NOTICE: To prevent waterlogging, check tank air charge annually.

Tank

Tanks are pre-charged with 40 PSI air pressure at the factory.

Your tank requires an air ch.arge of 40 pounds per square

inch (PSI) for proper operation; check tank pressure with

tire gauge to determine flair charge needs adjustment. Tank

pre-charge should be checked annually; see instructions at right.

In areas where the temperature is high for long periods of

time, the tank pre-charge pressure may increase. This may

reduce the tank drawdown (amount of water available per cycle). If this occurs, reduce the pre-charge pressure to two

PSI below the pump cut-in setting of the pressure switch (normally to 38 PSI).

It is necessary to flush all air out of the piping system and

water reservoir portion of the pre-charged tank. This is re-

To Check Tank Air Charge

If drawdown (amount of water available per cycle), de-

creases significantly, check as follows:

1.To check air charge in tank, shut off electric power to pump, open faucet near tank, and drain completely.

2.At the air valve in top of tank, check air pressure with standard tire gauge. Air pressure should be the same as pump pressure switch cut-in setting (40 PSI).

3.If the air pressure is below 40 PSI, add air to the tank.

Use an air compressor or a portable air storage tank.

4.Use soap or liquid detergent to check for air leaks around

air valve. Continuous bubbling indicates a leak. If neces- sary, install new core in air valve. This is the same as

those used for automobile tubeless tires.

1 2 3 4 5

1.Tank nearly empty - air expands filling area above vinyl separator.

2.Water begins to enter tank - air is compressed above separator as it fills with water.

3.Pump-upcycle completed - air now compressed to

cut off setting of pressure switch.

4.Water being drawn from tank - compressed tank air forces water out of separator.

5.Separator completely empty - new cycle ready to begin.

Figure 3

ELECTRICAL

Table II Wiring Chart - Recommended Wire and Fuse Sizes

					Distance in FeetfromMotorto			Meter
			Branch	0'to	101'to	201'to	301'to		401'to
Motor		Max. Load	Fuse*	100'	200'	300'	400'		500'
Horsepower	Volts	Amps.	Rating Amps			Wire Size
1/2	115/230	8.8/4.4	1_15	14/14	12/14	10/14	8/14		8/12