Waterco MICRON - Initial Startup of Filter

BACKWASHING
The function of backwashing is to separate the deposited particles from the lter media grains and ush
them from the lter bed. Backwashing is achieved by reversing the ow of water through the lter bed
at a fairly high ow rate. This high ow rate expands the lter bed and the water ow carries the debris
out to waste.
INITIAL STARTUP OF FILTER
Be sure correct amount of lter media is in the lter vessel and that all connections are hand tightened.
1. Depress Multiport Valve handle and rotate to the BACKWASH position and open the air release valve
on the lter or Multiport Valve.
NOTE: To prevent damage to control valve seal, always depress handle before turning.
2. Switch on the Pump / Open the Inlet Valve allowing the lter vessel to ll with water.
NOTE: If a pump is installed, switch the pump on and off, instead of closing and
opening the Inlet Valve.
3. One a steady ow of water is running through the waste line, close the air release valve and let the
pump run until the waste water is clear. The initial backwashing of the lter is recommended to
remove any impurities or ne particles from the lter media until the sight glass is clear. This process
may take up to 3 minutes.
4. Turn the pump off, Multiport Valve to the RINSE position. Switch on the Pump / Open the Inlet Valve
until water in sight glass is clear — approximately 10 to 15 seconds .
5. Switch off the Pump / Close the Inlet Valve, set the Multiport Valve to the FILTER position and Switch
on the Pump / Open the Inlet. The lter is now operating in its normal lter mode.
6. Adjust pool suction and return valves to achieve desired ow. Check the plumbing and lter for water
leaks and tighten connections, bolts, and nuts, as required.
7. Record the pressure gauge reading (start up pressure) during initial operation. After a period of time,
the accumulated dirt and debris in the lter causes a resistance to ow, and the ow diminishes.
The pressure will start to rise and the ow of water will start diminishing. When the pressure gauge
reading is 50 kPa (7.2 psi) higher than the initial “Start up” pressure, it is time to backwash (clean) the
lter (see Backwashing).
NOTE: If the lter is connected to mains water, it is not necessary to record the “Start up” pressure,
as mains pressure tends to uctuate.
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