Re: Air con circulating pump
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Nick, If you cruise in the tropics, that will not be enough water flow. From my Amel Book: "The basic rule of thumb is 1 gallon per minute (GPM) is required for every 4,000 Btu’s of capacity. So, 9,000 * 3 = 27,000/4,000= 6.75gal/min * 3.785=25.55liters/min * 60 = 1,532 liters/hour OR, 6,75GPM * 60 = 405GPH. The original 53 & 54 pump, the Climma BCM20 is rated at 1200+ gal/hr (GPH), which is three times what it should be rated at using the "rule of thumb." However, as you know, when all 3 A/Cs are running, the salon gets its required saltwater from the output of the aft AC, which has been heated because of heat transfer. And the fore AC gets its required saltwater from the output of the aft AC and the salon AC, which has been heated because of heat transfer. I really do not know how to take all of that "pre-heated" water into account. Veco (Climma) uses Calpeda pumps and brands them with the Climma brand. When they do this, they assign a Climma number. The Calpeda number is BCM20/E for the original AC saltwater pump. Calpeda no longer offers a BCM20/E, they currently offer a Calpeda BCM22/1/A-R and it is 50/60Hz. It moves 1,700GPH. And even better is the Gianneschi 01CB22G302 with a 95MM Impeller. It pumps 1841 GPH and is 230VAC 50/60htz." The thing that ruins all required flow calculations is that the ACs on SMs and 54s are connected to the saltwater line in series. Bill
On Mon, Jun 21, 2021 at 1:10 AM ngtnewington Newington via groups.io <ngtnewington=aol.com@groups.io> wrote: I bought a Dormaire magnetic aircon circulating pump rated 950gph to replace the old. Euro 264.
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