I found the manual finally - under a pile on my desk, heh. Set it up and it works great. I don't have a Calcium Reactor yet so this will be delivering the tanks calcium needs for now. I don't have any calcium needing coral in there yet anyway (apart from some freebies I got with my LR). Just soak the feed pump in a glass of vinegar every 3 months and there won't be any seizing issues.
The 902 is fantastic but it take a week for it to dial in. Been playing with skimmate production lately to weigh up dry vs wet. I got my LR at the weekend and have it curing in some plastic boxes and the die-off is incredible. The spare room is quite toxic to the nose, lol. So I'm putting some LR in the skimmer section of the sump and set the 902 to run super wet so the skimmer is skimming out the die-off I hope. Going to create a new thread on this in the main forum as I need some advice on how quickly I can add the LR without breaking the bio-filter.