Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-08-2009, 17:41   #1
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
24vdc Power Supplies ... and Pumps

Here's my sad story: My 12v Whale 220 diaphragm shower sump pump has died. The diaphragm and flapper valves appear to be in good shape and the motor runs. The water just goes up and down but does not empty. The motor is also blowing the 5A fuse that is recommended, but not the 10A fuse I replaced it with. Under normal circumstances I would just replace the pump, but...I'm in the beginnings of an extensive refit and will be converting the boat over to 24v, so I really don't want to be buying a new 12v pump which won't be used very long.

So I did a little research and figured the solution to my problem would be to purchase a 24v power supply which would run off shore power. Also figured I'd buy one larger than I need for the sump pump as I will be adding a transfer pump for my holding tank system in the not too distant future, thus killing two birds with one power supply stone, so to speak. The problem is, I know nothing about power supplies. What am I looking for when I go to buy one besides the obvious correct amperage? What do I want? Is there anything I don't want? I figure this would be the place to find out.

My secondary question regards the pump itself. My local chandlery favors Viking pumps claiming they are an excellent brand and very durable as well as reliable. Has that been your experience with them? I like to support local businesses when I can and these guys give me pretty respectable discounts, pretty close to what Defender would sell for.

Regards and my thanks in advance for you help.

TJ
__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Old 16-08-2009, 18:27   #2
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
What is your reason for converting over to 24VDC? As you are experiencing now, 12VDC equipment is much easier to find and because it is sold on a much larger scale, economies of scale apply. I already understand that you can have smaller sized wire for wire runs with 24VDC, but if you already have the wires runs suitable for 12VDC, then why replace it? That reason is generally why larger vessels go with 24VDC...to save the weight and the cost on the wire runs...in addition to smaller equivalent horsepower motors.

I'm not questioning your reasoning at all, just wondering what are your reasons.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 16-08-2009, 18:32   #3
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
I don't think that's quite as true as it once was. However, the reason for the conversion is the boat is on the large size (65') and was not properly wired at the onset, so whether I change the voltage or not, I still need to re-wire. Given the length of some of the runs, 24v just seemed to make a lot more sense. As I'm pricing out materials, I'm not finding the 24v option to cost much more and in many case, it doesn't cost any more at all.

Regards,

TJ
__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Discount marine supplies CaptG Product or Service Reviews & Evaluations 21 26-07-2016 21:11
Using Single Diaphram Pumps as Bilge Pumps jlogan Plumbing Systems and Fixtures 12 29-09-2009 09:05
Books and Supplies for Caribbean Schools jim_thomsen Atlantic & the Caribbean 0 31-05-2009 20:37
Discount Marine Supplies in New Zealand ? Mata'irea Pacific & South China Sea 13 28-11-2007 02:25



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:12.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.