Culligan Iron-Cleer - Manual (Page 7)

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.
Operation Of Aeration Pump
The Iron-Cleer™ system introduces air into the aeration tank and bleeds off the old head of air
automatically. The exchange of the air into the aeration tank is controlled independently of the
recharge frequency of the filter media tank, allowing the air to be exchanged on a more frequent
basis. During an air exchange cycle, the air compressor pumps fresh air into the aeration tank and
the air eliminator solenoid exhausts the old air.
Advantages Over Other Systems
1. No chemicals or salt.
2. No air injectors, venturis, or micronizers.
3. No floats to regulate air volume in aeration tank which “foul” from iron.
4. Two-tank system consisting of a pressurized aeration tank and multi-media depth filter.
5. 110V aeration pump to recharge aeration tank.
6. Can be used on shared wells, municipal water supplies or with buried pressure tanks without
additional equipment.
7. Better filtration results.
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