Hayward HCF Series Installation And Operation Manual page 7

Testing Filter
Before adding any sand to the filter, it is very important to test the system with water only. All filters are tested with high pressure before leaving the
factory. It is important to test the system without sand first, to check for leaks. Open the air bleeder valve. Fill the system with water. When water, not
water and air, is discharged from the air bleeder valve, close the air bleeder valve. Run system as normal and check for leaks. If there is a problem with
the test, contact Hayward customer service immediately. If sand is added before the test and there is a problem with the filter, the sand will need to be
evacuated in order to inspect for potential damage. Hayward will not be responsible for the removal and replacement of the sand for warranty or repair
work, nor will Hayward provide labor to evacuate and replace the sand for repair work done due to transportation or installation damage. This is also a
good chance to check all of the system plumbing. Do not drain the water from the filter after the testing sequence.
Installation of the Sand
After testing has been finished and the system is 100% operational, add the filtration sand required. Use #20 silica sand (.45 - .55 mm). Open the vent
valve, remove the manway cover and seal from the filter (page 5). Ensure the filter is full of water up to the inlet port. The proper amount of sand is listed
in on page 4. If a diffuser head is directly underneath the manway opening, cover it with plastic and tape to prevent sand from entering the plumbing.
Notice - Remove any plastic and tape from the diffuser after the sand is poured in the filter and before starting the system.
Now, replace the lid and lock ring cover and seal into the filter tank (page 5). Be sure that the lid and filter neck is free of debris. If the sealing surfaces
are not free of sand, the seal will not seat properly and could cause the filter to leak at the lid. Use the air bleeder valve to remove air from the filter. Put
the filter valves into the backwash mode, turn the pump ON, (see next section) and run for about 3 to 5 minutes. This will level the sand inside the filter.
Turn pump OFF, put the valves into filter position and the system is ready for operation.
Operation
Filtration
Note: Hayward Commercial offers a complete line of valves and connection kits for the Hayward line of Commercial Pool Filters.
Refer to the table on the bottom of page 3 to ensure that the correct valve is used for your filter.
With the pump turned OFF, arrange the valve(s) for filtration. Start pump, open air relief vent valve until solid stream of water is coming out. Close the
vent valve and read the pressure gauge. This is the normal start up pressure when the filter sand is clean. Make a note of the start up pressure.
When the pressure gauge shows a pressure rise of 7 to 10 psi above the start up pressure, it is time to backwash the filter.
Backwash
NOTICE – Check the water level in the skimmer opening before and after backwashing. Replace water after backwashing to at least 2 inches above the
bottom of the skimmer opening.
To backwash the filter, stop the pump, set the valve(s) into the "Backwash" position and restart the pump. The backwash cycle should be run for 3 to 5
minutes or until clean. Once backwash is complete, turn pump off and set valve(s) to the "Filter" position and start pump.
Pressure Surge Hazard- Failure to turn off filter pump before changing valve position can result in personal injury or property damage. It is very impor-
tant to turn off the filter pump(s) prior to changing valve(s) position.
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USE ONLY HAYWARD GENUINE REPLACEMENT PARTS