Will you continue to use the 922 to receive any zero key channels or only use the 9000i?
If keeping the 922 receiver in service, it would be best to use a dual output LNBF like the C2W-PLL instead of a single output model. Each receiver would be connected to a dedicated LNBF output to allow each to select polarity. The 922 LNB setting would be set to LNBF type for 13/18Vdc Vertical/Horizontal polarity control. The 9000i LNB power setting would remain on the default auto mode for 13/18Vdc polarity switching. I would not loop out of the 9000i to the 922 or use a splitter as this could cause polarity control issues.
If the 4DTV will be used only as a dish mover, run the coax from the single output C1-PLL LNBF directly to the 9000i with no coax connection to the 4DTV. The 9000i LNB power setting would remain on the default auto mode for 13/18Vdc polarity switching.
If you want the 9000i to automatically move the dish instead of having to manually move with the 922, consider removing the 922 from service and instead use a DiSEqC 1.2 positioner.
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