Active Aqua Water Chiller 1/2 HP with Power Boost. 4,020 BTU

Sizing the Active Aqua 1/2 HP Chiller to a Shared Tank Rated capacity is 4,020 BTU per hour over a recommended 90 to 172 gal. The loop moves 800 to 1,600 GPH, matched to the 800 and 1,000 GPH pumps named for it. Electrically it asks for 510 W at 120 V and 5.4 A. At that draw it deserves its own circuit rather than sharing with a light or a dehumidifier. Fittings for 1/2 in, 3/4 in and 1 in line all ship with it, which covers most trunk plumbing without a trip out. Refrigerant is R134a and the exchanger is pure titanium. The cabinet is 19 x 14 x 19 in and 48.5 lb. Working pressure tops out at 10 psi, and the unit is for indoor use only. Set point covers 39 to 90 °F with memory through an outage. The part number is AACH50HP and the barcode reads 638104022989. What Nutrient Solution Temperature Does Across Many Sites A shared tank feeding a row of buckets has one temperature and many places for it to drift. Return lines sitting in warm air pick up heat on the way back. The number at the tank is not the number at the root. Pull the intake from the deepest point and send the return to the opposite end. Check both ends with a probe rather than trusting a single reading. Warm water holds less dissolved oxygen, and in deep water culture the roots never get a break from it. That is the mechanism behind most slow declines that look like a feeding problem. Boost runs two hours hard or stays on continuously, which is how a tank that sat warm overnight gets back in range before lights-on. Start the pump first and let flow establish before the compressor engages. The honest cost of a unit this size is the heat it rejects into whatever room it stands in. Put it outside the canopy space and the dehumidifier stops fighting it. Leave room at the barrel for a union so the exchanger can be flushed without breaking the trunk line apart. Key Features 4,020 BTU per hour: Carries a shared reservoir feeding several sites through a full photoperiod. 90 to 172 gal window: Sized for the tank a multi-site recirculating room actually runs. Three fitting sizes included: 1/2 in, 3/4 in and 1 in adapters cover trunk plumbing out of the box. 800 to 1,600 GPH loop: Matches the 800 and 1,000 GPH pumps named for this unit. Pure titanium exchanger: Nutrient solution and salt water both leave it alone. Boost plus memory: Hard two-hour pull-down, and the set point returns by itself after an outage. Technical Specifications Specification Value Cooling capacity 4,020 BTU/hr Recommended reservoir volume 90 to 172 gal Required flow rate 800 to 1,600 GPH Refrigerant R134a Evaporator Pure titanium, fresh or salt water Power 510 W at 120V, 5.4 A Set-point range 39 to 90 °F (3 to 32 °C) Boost modes 2-hour boost or continuous Temperature memory Returns to last setting after a power cut Fittings included 1/2 in, 3/4 in and 1 in Unit dimensions 19 x 14 x 19 in Weight 48.5 lb Maximum working pressure 10 psi Use Indoor only; not for house plumbing Recommended pumps Active Aqua 800 or 1,000 GPH Manufacturer part number AACH50HP UPC 638104022989