SolarAttic PCS1, User Manual

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SECTION 3 - INSTALLATION Page S3-12
valve is required so that proper skimmer action can be maintained when in
Òreverse flowÓ. Without it, water would be blown out of the skimmers.
Suction follows water volume. The proportioner allows the majority of
water to flow from the flowreversal valve [via the main drain or return lines] and
just the right amount of water flow from the skimmer line. This creates proper
suction on the skimmers and allows the skimmers to function ÒindependentÓ of the
main drain.
14. The vacuum line is usually connected to the skimmer suction line and
with its own shutoff gate valve as discussed above.
15. Effective flowreversal is observed by feeling suction from the return line
holes and skimmers. In addition, water flow should be observable out of the main
drain.
16. The proportioner valve can be turned all the way to the right to allow all
of the pumpÕs intake suction to be directed to the skimmer line [or vacuum line] for
cleaning purposes. Mark the normal position of the proportioner valve pointer!
This allows an easy ÒresetÓ after vacuuming, backwashing or draining operations.
17. It is not usually feasible to simply plumb an inground pool in reverse
flow since the pool may have to be drained to the bottom through its Òmain drainÓ.
NOTE : Aboveground pools can be permanently plumbed for reverse flow by
simply using a pipe running over the edge of the pool and returning the water from
the PCS1 into the bottom of the pool. Aboveground pools do not need the
flowreversalª or proportioner valves since their plumbing is simplified compared
to inground pools.
18. Operation of the Bypass Valve can be observed when the LX220 is
switched on to manual and back to off. Rotation stops when the valve reaches its
predetermined electrical stops. This is set internally by cams and micro switches.
19. Automatic drain down of the PCS1, in the off mode, can be obtained by
installing a solar drain down kit. This is available from SolarAttic, Inc and consists