Pump Installation - Sears 390.250251 Owner's Manual

Pump Installation

SEARS jet pumps can be used with SEARS Captive Air
Tanks as shown in Figure 2, Page 4.
For mounting pump to tank, order tank fitting Kit No.
2788.
SEARS Captive Air ® Tanks are precharged with air at the
factory. Check the tank Owner's Manual to find if air
charge needs adjustment. Your pump requires 20
pounds for proper operation.
The SEARS jet pump can also be mounted on standard
horizontal tanks. A kit consisting of all necessary pip-
ing, elbows, and other fittings, is furnished with the
tank for mounting pump using this method. See Figure
3, Page 4. Instructions are included with tank.
Air Volume Control –
Included With Standard Horizontal Tank
There is a 1-1/4" x 1/4" reducer bushing and a 1/4" x
1-1/2" nipple supplied in the fittings package. Use the
one that fits into the air volume control tapping in the
end of the tank as shown in Figure 3, Page 4. Use pipe
compound on male threads. Screw the air volume con-
trol on to the 1/4" fitting and the right angle compres-
sion fitting into the bottom tapping of the air volume
control.
Remove the 1/8" pipe plug, Key No. 15, Page 10, on
the jet portion of the pump body near the check valve.
Insert a 1/8" compression fitting into this tapping. Cut
tubing to length and assemble the two fittings in the
air volume control and pump body. Use nuts, sleeves,
and inserts furnished.
INSTALLATION
Priming the Pump
®
without water may cause pump to overheat, dam-
aging seal and possibly causing burns to persons
handling pump. Fill pump with water before start-
ing.
charge. To do so can boil water inside pump,
causing hazardous pressure in unit, risk of ex-
plosion and possibly scalding persons handling
pump.
DO NOT START MOTOR UNTIL PUMP HAS BEEN
FILLED WITH WATER.
1. Remove the priming plug. fill pump with water.
Replace priming plug. If a priming tee and plug
have been provided for a long horizontal run, be
sure this line is filled and the plug replaced, using
pipe compound on plug threads. See Figure 3, Page
4.
2. Start the pump. Water will be pumped in a few min-
utes; the time depending upon the depth to water,
and the distance of horizontal run. If pump does
not prime, check for a possible leak on the suction
side of the pump. Reprime. Check to be sure suc-
tion lift – distance from water level to pump – does
not exceed 20 feet.
5
Never run pump dry. Running pump
Never run pump against closed dis-