Harris 156593 User Manual

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CHAPTER 5: MULTIPORTVALVEOPERATION
1. Filter: Position for ltering the body of water.
Incoming water from the piping system is
automatically directed by the Multiport Valve to the
top of the lter bed. As the water is pumped through
the lter sand, dirt and debris are trapped by the
lter bed, and ltered out. The ltered water is
returned from the bottom of the lter tank, through
the Multiport Valve and back through the piping
system.
2. Backwash: Position for cleaning the lter media.
Water ow is reversed by the Multiport Valve
through the lter bed so that water ow is directed
to the bottom of the tank and up through the lter
bed, ushing the previously trapped dirt and debris
out the waste line.
3. Rinse: Position for ushing the lter system.
The water ow is directed by the Multiport Valve
through the lter bed and out the waste line. This
process settles the lter media bed into place and
ensures any dirt or debris is rinsed out of the lter,
preventing possible return to the Swimming Pool or Spa.
4. Waste: Position for bypassing the lter bed to
Waste. The water ow is directed by the Multiport
Valve straight to the backwash outlet, bypassing the
entire lter bed. This Multiport Valve position is used
to lower the water level or for vacuuming water with
high dirt loads. NOTE: This position is not available
on 4-Way Multiport Valves.
5. Re-circulate: Position for bypassing the lter bed
to the Swimming Pool or Spa. The Mulitport Valve
recirculates water ow directly back to the Pool or
Spa, bypassing the lter. NOTE: This position is not
available on 4-Way Multiport Valves.
6. Closed: Position for closing all ow to the lter.
This position is not to be used with the pump
operating. NOTE: This position is not available on
4-Way Multiport Valves. CAUTION: Operation of
the Multiport Valve or mode selection is to be
always done with the pump switched off.
CHAPTER 6: BACKWASHING
The function of backwashing is to separate the
deposited particles from 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 collects the debris taking it to
waste.
ConditionsforBackwashing
Time for backwashing is determined by the following
conditions:
1. The ow rate through the lter bed decreases until
it is insufcient to meet the demand.
2. The removal efciency of the lter bed decreases
to the point where the efuent quality deteriorates
and is no longer acceptable.
3. When the pressure gauge reading is 7.2 PSI
higher than the start up pressure.
4. If the lter is connected to mains water, pressure rise
is not an accurate indicator as mains pressure
tends to uctuate. It is best to rely on the actual ow
rate. NOTE: We recommend that you backwash
 a swimming pool sand lter in a residential
installation at least once a month.
ImportanceofBackwashing
The importance of backwashing cannot be overstated.
Dense lter media can become “packed” without
proper and frequent enough backwashing. Debris
will remain trapped and create channeling within the
lter bed. This will result in the lter bed exhausting
early. Moreover, if debris is not ushed from the media
grains, the lter bed will become dirtier and dirtier as
time goes on until the lter operation fails.
Backwashing Instructions
1. Switch off the Pump. Close the Inlet Valve.NOTE:
If a pump is installed, switch the pump on and off,
instead of closing and opening the Inlet Valve.
2. Release the lter’s pressure by loosening Pressure
Release Valve until the Pressure Gauge needle
drops to zero <0>.
3. Retighten Pressure Release Valve.
4. Depress and turn Handle 180º to the BACKWASH
position. In the BACKWASH position, the water
ow is automatically reversed through the lter so
that it is directed to the bottom of the lter vessel,
up through the sand, ushing the previously trapped
dirt and debris out the waste line.
5. Switch on the Pump. Open the Inlet Valve.
Backwash water will ow out through drain pipe.
6. When the backwash water in the sight glass
appears clear, Switch off the Pump. Close the Inlet
Valve.
Backwash
Filter
Close
Waste
Recirculate

Harris 156593 Specifications

General

Brand	Harris
Model	156593
Category	Water Filtration Systems
Language	English