Pentair THS Series Installation And User Manual page 46

Diaphragm valve style face piping
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STEP 2: Verify that multiport pressure gauge returns to normal pressure.
When actuating the valves the pressure to the multiport valve drops. When the
valves become actuated the pressure gauge will begin to rise, and should return to
its preset value (35 psi minimum). At this point, the valves are fully actuated. If the
pressure does not return to its initial value, please consult the troubleshooting
section of this manual. After the pressure has returned to normal, proceed to step
3.
STEP 3: Backwash the tank for 3-5 minutes. After the valves actuate, the filer
is now running in backwash mode. Water should be coming out of the waste pipe
and going to the drain. The filter tank should be backwashed 3-5 minutes, or until
the water in the sightglass runs clear. When the water runs clear, the tank is
cleaned. If there is more than one tank in the system proceed to step 4. If the
system consists of only one tank, proceed to step 6.
STEP 4: Rotate the multiport
valve to position 2. This will
actuate the valves to backwash
tank 2.
STEP 5: Follow steps 2 and 3 as explained above.
STEP 6: Return the multiport
valve to the "Home" position.
This will set system back into
normal filtration mode.
Diaphragm Valve Face Piping Kit Installation Manual
5/31/12
Pg. 45 of 52
Rev. F

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