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Calpreda pump for aircon
John Hollamby <annejohnholl@...>
I have just found that the slinger on the shaft of this pump is spraying sea water. In my spares I have a ceramic seal and another seal without any instructions in a bag labelled Calpreda. I intend to open the pump up tomorrow but wonder whether anyone has any useful advice because if there is likely to be something sinister I will just not use the aircon until we get somewhere where there is an agent.Annoying as we were about to sail away for the summer.
Anne and John, Bali Hai, SM 319
Anne and John,
You will find the pump is very basic. I just rebuilt mine. It was pretty
easy to do. I replaced the impeller, the two set of bearings and the
bushing. I also added a capacitor into inventory. That's pretty much the
whole pump. Runs like a charm.
BeBe has some pics here:
Judy and Bill aboard SV BeBe <yahoogroups@...>
John,toggle quoted message Show quoted text
This is a very good pump and easily rebuilt. Hopefully the leaking seal has not ruined the bearings. Take a look at the photos here: http://groups.yahoo.com/group/amelyachtowners/photos/album/324976668/pic/list
The process is very straightforward. If you heard squealing noises when this happened, the bearings are bad. Water leaking from the seal will quickly ruin the bearings. In that case try this:
Remove the shaft and armature with the bearings still on the shaft. Take your shaft to anywhere that sells bearings and they will sell you new bearings. Go to any shop that has a hydraulic press to press-off the old and press-on the new bearings (possibly the shop that you purchase the bearings). In Penang, Malaysia I went to a Chinese bearing shop and bought bearings for about $3.00, then went to a motorbike shop and had them pressed on for about $2.00.
If you have the same size fresh water pump as BeBe, #387, this ceramic mechanical seal that you have will fit it also. If I were you, I would keep 1 or 2 of these mechanical seals as spares.
Hope this helps,
BeBe, SM2k, #387
Currently at the Amel Pontoon, Gocek, Turkey
--- In amelyachtowners@..., "Mark Erdos" <mcerdos@...> wrote:
Hi John,toggle quoted message Show quoted text
We just completed the rebuild on our Calpeda pump. There was no leak but an impressvie extent of electrolysis and loss of about 1/2 the impeller despite what appeared to be a good ground.
There's an O ring ithat seals and seats the ceramic bushing in the pump housing. The instructions say to be sure the shaft is absolutely clean and smooth and to rotate the shaft several times by hand to seat it in the bushing before running it electrically. There's a spring loaded white seal that then fits on the shaft and rides on the black. The black bushing and the white ring provide the pressure and rotating surface that prevents leaking.. It's a bit of a challenge to get the Woodruff key back in with the spring, but you'll see how it all fits together with the double-nut holding the impeller.
The impellers are different for 50 or 60 Hz pumps. Be sure they give you the correct one.. Replace the large O ring for the bronze pump halves. With the new seals, there's plenty of water flowing, the pump is quiet and cool, and no leaks.
My system included a back-flow preventer valve. I don't know if that's universal or something added to our system.
We were able to source the capacitors in Langkawi for about $4.. The one I got in the US from Calpeda was $40...
SY Revelation SM390
--- In amelyachtowners@..., "John Hollamby" <annejohnholl@...> wrote:
We were finally able to photograph the markings on the Calpeda A/C pump and this is what we got from the distributor in the U.S.:
Calpeda BCM 20E
220V-240V ~50 Hz
The quote is $1300 delivered to Miami.
Lead time, three weeks.
As we will be leaving earlier than that, looks like we may have missed our chance to buy this pump in the U.S., unless we have it shipped to Newport.
SM2K #350 (2002)
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