Davey ECOPURE F14, F16, F18, F21, F25 & F28 Fibreglass Media Filters - Manual (Page 5)

5
Filter and Control Valve functions
Installation / Start-up of Filter
1. Be sure correct amount of filter media sand is in tank and that all
connections have been made and are secure.
2. With pump off depress control valve handle and rotate to BACKWASH
position. (To prevent damage to control valve seal, always depress handle
before turning.)
3. Prime and start pump according to pump instructions (be sure all suction
and return lines are open), allowing the filter tank to fill with water. Once
water is flowing out of the waste line, run the pump for at least 1 minute.
The initial back-washing of the filter is recommended to remove any
impurities or fine sand particles in the sand media.
4. Turn pump off and set valve to RINSE position. Start pump and operate
until water in sight glass is clear, about 1/2 to 1 minute. Turn pump off and
set valve to FILTER position and restart pump. The filter is now operating
in the normal filter mode, filtering dirt particles from the pool water.
5. Adjust pool suction and return valves to achieve desired flow. Check
system and filter for water leaks and tighten connections, bolts and nuts as
required.
6. Note the initial pressure gauge reading when the filter is clean. (It will
vary from pool to pool depending upon the pump and general piping
system.) As the filter removes dirt and impurities from the pool water,
the accumulation in the filter will cause the pressure to rise and flow to
diminish. When the pressure gauge increases between 30kPa and 50kPa
above your ‘clean’ filter gauge reading, it is time to backwash the filter (see
BACKWASH under filter and control valve functions table above).
NOTE: During initial clean-up of the pool water it may be necessary to
backwash frequently due to the unusually heavy initial dirt load in
the water.
Valve Position Function
FILTER
Normal filtration and vacuuming.
BACKWASH Cleaning filter by reversing the flow.
RINSE Used after backwash to flush dirt from valve.
WASTE By-passes filter, used for vacuuming to waste or lowering water level.
RECIRCULATE By-passes filter for circulating water to pool.
CLOSED
Shuts off all flow to filter or pool.