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If your system can develop more than
100 PSI pressure, install a Sears No.
2729 relieve valve in system to prevent
possibility of tank blow-up.
NOTICE: All Captive Air
®
and 390.291358 are designed to operate in the vertical
position.
The tank is shipped from the factory with a pre-charge of
air. This system DOES NOT require the use of any outside
air charging devices such as air volume controls on jet
pumps, or bleeder orifices on submersible pumps.
Tanks
Tanks
From
From
Well
Well
Pressure
Pressure Switch and 27229
Relief Valve Location When
Switch
Using Submersible Pump
FIGURE 8
BEFORE YOU START YOUR PUMP
Your tank is factory charged with forty (40) pounds of air
pressure. To determine pressure switch setting, see pump
owner's manual. If your pump pressure switch cut-in set-
ting is less than forty (40) pounds, the tank air pressure
MUST be reduced to this cut-in pressure switch setting
(see table). To do this, bleed air from the valve located on
top of the tank. Check pressure frequently with an accu-
rate tire pressure gauge until correct pressure has been
reached.
Conventional pump pressure switch settings on SEARS
pumps are as follows:
CUT IN/CUT OFF
20/40 PSI
30/50 PSI
40/60 PSI
INSTALLATION
Tanks except Models 390.291198
To
To
Service
Service
PRECHARGE
20 PSI
30 PSI
40 PSI
Captive Air
the supply of usable water (drawdown). Two tanks of the
same size will double the supply and three tanks will triple
the supply. See Figures 8 and 9 for typical installations.
When using a submersible pump, the manifold and switch
assembly must be installed in the pipe line as close to the
center of the tanks as possible. See Figures 8 and 9.
From
From
Well
Well
Pressure Switch and 27229
Pressure
Relief Valve Location When
Switch
Using Submersible Pump
FIGURE 9
OPERATION
NOTICE: For years of trouble free service, check pre-
charge annually. See service hints (Page 7) for procedure.
NOTICE: Release and expel all air out of the piping sys-
tem and the water reservoir portion of the Captive Air®
Tank. This is required on new installations, pumps requir-
ing repriming and pumps that have been apart for service.
To accomplish this, open faucets farthest away from tank
and start the pump. Observe the sputtering water flow
from faucets. This is a mixture of air and water. Allow
pump to run until there is a steady air free stream of water.
Open and close faucets repeatedly until you are sure all air
has been removed.
If air continues to remain in system, check for leaks in pip-
ing on suction side of pump system (Jet Pumps Only).
If you have a submersible pump, remove the bleeder ori-
fices in the pipe (just below the well seal) and replace
bleeder orifice with pipe plugs.
6
®
Tanks can be connected together to increase
Tanks
Tanks
To
To
Service
Service
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