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General Information
GENERAL INFORMATION
All tanks are factory pre-charged with air. When
installing tank, adjust pre-charge to 2 PSI below
pump cut-in pressure setting. To do this, bleed or
add air through valve on top of tank.
NOTICE: Transport and install tank in vertical posi-
tion ONLY!
NOTICE: Always set pre-charge with NO WATER in
tank.
Check pressure frequently with an accurate tire
pressure gauge until correct pressure has been
reached. For correct pre-charge pressure settings,
see Chart 1, below.
CHART I
Pressure Switch Setting
20-40 PSI
30-50 PSI
40-60 PSI
Tank Precharge Settings for use with PENTEK
INTELLIDRIVE Variable Frequency Drives
Set the pressure tank's pre-charge to 70% of the
system operating pressure. When using an external
set point as well as an internal set point, pre-charge
the tank to 70% of the lower set point of the two.
Some applications may require a different percent-
age when figuring the set point. Refer to your
PENTEK INTELLIDRIVE operator's manual for
additional information.
From
Well
Pressure Switch
Figure 1A
Tanks
From
Well
Pressure Switch
Figure 1B
Tank Precharge (PSI)
18
28
38
Tanks
To
Service
NOTICE: Replace and tighten air valve cap if it is
removed for any reason. Failure to replace air cap
may allow loss of air pressure and eventually lead
to tank waterlogging and water cell failure.
Pre-charged storage tanks can be connected
together to increase 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 No. 1A and 1B for typical installations
of this kind.
OPERATING CYCLE
1. Tank nearly empty – air expands filling area
above vinyl water cell (Fig. 2A).
2. Water begins to enter tank – air is compressed
above water cell as it fills with water (Fig. 2B).
3. Pump-up cycle completed – air now com-
pressed to cut off setting of pressure switch
(Fig. 2C).
WATER
Figure 2
CHART II – Water Yield Per Pump Cycle
(drawdown) in Gallons
Model
PS6-S02
PS6H-S05
PS19S-T02
PS19T-T02
PS19H-S00
PS32-T03
PS35-T05
PS50-T50
To
PS62-T51
Service
PS85-T52
PS119-TR50
A
WATER
C
WATER
Pressure Switch Setting (PSI)
20-40
30-50
2.2
1.8
2.2
1.8
6.9
5.8
6.9
5.8
6.9
5.8
11.6
9.8
12.7
10.7
18.3
15.5
21.4
18.3
30.0
26.0
41.3
35.4
3
B
D
40-60
1.6
1.6
5.0
5.0
5.0
8.5
9.3
13.4
16.0
22.0
31.0
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