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A
Tank is nearly empty:
Water storage bag is at bot-
tom. Air expands to fill space
above bag. The pump starts.
FIGURE 10
NOTICE: To prevent waterlogging, check tank air charge
annually.
TO CHECK TANK AIR CHARGE
If drawdown (amount of water that comes out of tank per
pump cycle) decreases significantly, check as follows:
1. 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 pressure gauge. Air pressure should be the
same as pump pressure switch cut-in setting.
3. If the air pressure is below the cut-in setting, 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 necessary, install new core in air valve. This is the same
as those used for automobile tubeless tires.
Remaining portion
of valve stem
FIGURE 11
OPERATION
B
WATER
Water starts to fill the bag:
As bag fills, air above the
bag is compressed.
SERVICE HINTS
Remove nuts
( 6 Places)
Vinyl
bag
1448 0195
C
WATER
Bag is full to capacity:
Air is compressed to the
utmost for maximum draw-
down. The pump stops.
TO CHECK PUMP PRESSURE SWITCH
1. Start the pump and allow the pressure switch to shut it
off.
2. Check the tank air pressure with the tire gauge. It should
be the same as the cut-off pressure for your system. (See
"OPERATION" section on Page 6 for correct pressures).
3. If the pressure reading is different from your system rec-
ommended pressure, the switch should be replaced.
REPLACEMENT OF AIR VALVE
If air valve becomes broken, or leaks beyond repair, it may
be necessary to replace it.
FIGURE 12
It is a standard tubeless tire valve which snaps in position
in groove as it is pulled up thru hole from inside tank.
1. Disconnect power to pump.
2. Relieve (drain) ALL water in system by opening faucet
closest to tank.
3. Relieve (expel) ALL air pressure in tank by removing
core from inside of valve.
4. Disconnect outside piping only to tank.
7
D
WATER
Water is being drawn
from the bag:
Compressed air in the
tank forces water out.
Groove
1449 0195
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