Culligan High Efficiency Sulfur-Cleer 10" Fiberglass, Owner'S Manual

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Step 2
Aeration Operation Air Recharge Cycle
When energized, the air pump sends air through the solenoid valve into one end of the shuttle valve.
Once air pressure in the shuttle valve is greater than the water supply pressure at the other end of the
shuttle valve, the piston shifts to the open position. In the open position, the bleed-off port discharges
excess water and old air to the drain port through a flow restrictor. Simultaneously, the air inlet port
opens to provide a direct connection between the air pump and the top of the aeration tank. The air
pump runs for a preset period of time recharging the head of air in the aeration tank.
Air Recharge Shut Off
The timer turns power off to the air pump and the solenoid valve at the end of the recharge cycle. The
solenoid valve then closes the port between the air pump and the shuttle valve. The port between the
shuttle valve and the atmosphere opens and releases air pressure. This allows water pressure to shift
the piston to the closed position. With the piston in the closed position, the air recharge inlet port is
closed and direct communication between the bleed off tube and the drain port is also closed.
Timer Operation
A timer controls the air recharge cycle and how frequently it occurs. The timer simultaneously
energizes the air pump and the solenoid valve. After a preset amount of time, the timer shuts off
the air pump and de-energizes the solenoid valve.
Solenoid Valve Operation
The solenoid valve is a three-way valve having ports that connect to the air pump, shuttle valve and
the atmosphere. In the service cycle, the solenoid valve is de-energized and closes the port to the
air pump, providing a positive shutoff to the pump. This prevents water from backing up into the air
pump and damaging the pump. In the air recharge cycle, the solenoid valve closes the port to the
atmosphere and opens the port from the air pump.
Shuttle Valve Operation
In the service position, water pressure holds the shuttle valve piston in the closed position,
trapping the airhead in the aeration tank and closes the air recharge inlet port and drain port.
During air recharge cycle, air pressure is greater than the water pressure and forces the shuttle
valve piston in the open piston. The shuttle valve has an internal pressure relief valve that will
relieve pressure (greater than 100 psi) that may build up in the aeration tank. This precautionary
function protects components from failure due to excessive pressure.
Step 3
Filter Tank Operation—Backwash Cycle
Reversing the flow of water through the filter bed and backwashing dirty water to the drain cleans
the filter bed. Raw water enters the filter control valve through the inlet port and is directed down
the distributor tube and out the lower distributor at the bottom of the tank, flowing upward through
the multimedia filter bed toward the top of the tank into the control valve. Water is then directed
through a specific flow restrictor and out the drain port to be discharged to drain.
Step 4
Filter Tank Operation—Rinse Cycle
The rinse cycle packs the clean filter bed. Raw water enters the control valve through the inlet
port and is directed downward through the filter bed into the bottom distributor, up the distributor
tube into the control valve. Water is then directed through a specific flow restrictor and out the
drain port to be discharged to drain.