Reply
 
Thread Tools Display Modes
 
Old 09-25-2016, 02:14 PM   #1
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Identify Wema-systems bilge float switch?

Hi,

I need to replace bilge float switch made by Wema-Systems. Its a cylindrical unit with three wires that are Black, White and Green. Here's a photo of it:



It is part of a system that has a control module that looks like this:



I can't find any reference to a bilge switch like this and wonder if any of you has a suggestion for a replacement.

Thanks

Richard
__________________
Advertisement

Britannia is offline   Reply With Quote
Old 09-25-2016, 03:16 PM   #2
Guru
 
kchace's Avatar
 
City: Brookline, NH
Country: USA
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 757
Will one of these work? IMO these are about the best.

TEF-GEL - Ultra safety systems - Home page
__________________

kchace is online now   Reply With Quote
Old 09-25-2016, 05:59 PM   #3
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by kchace View Post
Will one of these work? IMO these are about the best.

TEF-GEL - Ultra safety systems - Home page
Thanks for the response. I might be able to use it - I don't need the high water alarm - I have that installed separately. However, one of the problems is that I don't know how my failed switch operates. I don't know what the three wires do. Also - my switch uses thin wires and clearly does not carry the current for the bilge pump. Rather it is wired to the control box I pictured and somehow the three wires control when the pump turns on and off. Unless I convert my bilge pumps to a different system I think i need to find a switch that behaves in the same way as my broken one.

I have emailed Wema and I'm hoping to get something useful from them. I just thought I'd see if any of the forum members recognized the system and could make recommendations.

Thanks again

Richard
Britannia is offline   Reply With Quote
Old 09-25-2016, 10:56 PM   #4
Guru
 
AusCan's Avatar
 
City: Adelaide
Country: Australia
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 2,091
You can get them from Fisheries supply.

Bilge Pump Switch - Wema-System | Fisheries Supply

This from their website

OVERVIEW
Wema heavy duty bilge pump switch incorporates 2 float activated reed switches protected from damage and jamming by a stainless steel housing. The reed switches are glass encapsulated, and all electronics are fully sealed within the switch head. The system incorporates a 25 amp relay, and the switch is rated for 20 amp pumps. Water in the bilge causes the magnetic float in the chamber to rise, activating the pump when it nears the top, and shutting the pump off as the water level falls and the float reaches the bottom.
• Easy to assemble
• Easy to maintain
• Wire harness is designed for automatic functioning with a manual override
AusCan is offline   Reply With Quote
Old 09-25-2016, 11:27 PM   #5
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by AusCan View Post
You can get them from Fisheries supply.

Bilge Pump Switch - Wema-System | Fisheries Supply

This from their website

OVERVIEW
Wema heavy duty bilge pump switch incorporates 2 float activated reed switches protected from damage and jamming by a stainless steel housing. The reed switches are glass encapsulated, and all electronics are fully sealed within the switch head. The system incorporates a 25 amp relay, and the switch is rated for 20 amp pumps. Water in the bilge causes the magnetic float in the chamber to rise, activating the pump when it nears the top, and shutting the pump off as the water level falls and the float reaches the bottom.
Easy to assemble
Easy to maintain
Wire harness is designed for automatic functioning with a manual override
Thanks so much for doing the research. Unfortunately, this is just a regular bilge pump switch with a manual override. It's not a replacement for my switch. This is designed to be placed in series with the bilge pump whereas mine is not. Here's the description I found on this switch:

PBK-12/24 - Wema System - PDF Catalogues | Documentation | Boating Brochures

Thanks again for looking

Richard
Britannia is offline   Reply With Quote
Old 09-26-2016, 10:45 AM   #6
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by Britannia View Post
Thanks so much for doing the research. Unfortunately, this is just a regular bilge pump switch with a manual override. It's not a replacement for my switch. This is designed to be placed in series with the bilge pump whereas mine is not. Here's the description I found on this switch:

PBK-12/24 - Wema System - PDF Catalogues | Documentation | Boating Brochures

Thanks again for looking

Richard
It's possible that I could use a conventional float switch - but I'll need to figure out how to wire it up to the module. I might have to end up experimenting.

Thanks again

Richard
Britannia is offline   Reply With Quote
Old 09-26-2016, 02:28 PM   #7
Guru
 
Tom.B's Avatar
 
City: Cary, NC
Country: USA
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,152
This maybe?

Bilge Pump Switch and Bilge Alarm by WEMA USA, Inc.

If I had to venture a guess, the green is still just a chassis ground for bonding and the black and white are the level sensing resistor.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
Tom.B is offline   Reply With Quote
Old 09-26-2016, 03:04 PM   #8
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by Tom.B View Post
This maybe?

Bilge Pump Switch and Bilge Alarm by WEMA USA, Inc.

If I had to venture a guess, the green is still just a chassis ground for bonding and the black and white are the level sensing resistor.
Yes - that's the same unit as suggested by AusCan. I might be able to make it work with my current system if I knew how it really works.

Your guess for the wiring seems logical. However, all the wires go into and entirely plastic part of the unit. So there'd be nothing to bond to. There's another thing - a feature of my system that I didn't mention yet. One of the features is that if you flip the switch to manual, just briefly, it will activate the pump, which will continue until the "low water" mark is reached. It will do this even if it's not yet at the "high water" mark. In order to do this I suspect that the unit has two switches - a high and low switch. Most units have two switches but also a relay so that the switch turns on a "high water" and off again at "low water". I suspect that this unit simply provides both switches back to the control module - that's what would be needed for this feature to work. In that case, one wire is probably common (the green?) and the other two would be the two switches.

Now I could conduct an experiment with the module by shorting the various wires to simulate the switch. From that I could probably determine how it all works. Ideally I'd like to get a real replacement part, or at least a known working alternative setup. I'd rather not cobble something together based on partial knowledge - especially when we're talking about a bilge pump!

Richard
Britannia is offline   Reply With Quote
Old 09-26-2016, 03:31 PM   #9
Guru
 
rochepoint's Avatar
 
City: Sidney BC
Country: Canada
Vessel Name: Rochepoint
Vessel Model: 1985 Cheer Men PT38 Sedan
Join Date: Apr 2009
Posts: 1,191
Her is a wiring diagram for the Wema bilge pump switch in the above link.
Attached Files
File Type: pdf PBK-WEMA_USA.pdf (220.7 KB, 15 views)
__________________
Cheers Mike Barge
MV Rochepoint
Sidney, British Columbia.
"Yes, I have the right anchor"
rochepoint is online now   Reply With Quote
Old 09-26-2016, 09:00 PM   #10
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,489
Why don't you give them a call. The folks at Wema have always been helpful when I talk to them.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is online now   Reply With Quote
Old 09-26-2016, 10:45 PM   #11
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by rochepoint View Post
Her is a wiring diagram for the Wema bilge pump switch in the above link.
Thanks - I had seen that - it confirms that it's designed to be wired inline with the pump.

Richard
Britannia is offline   Reply With Quote
Old 09-26-2016, 10:52 PM   #12
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Quote:
Originally Posted by HopCar View Post
Why don't you give them a call. The folks at Wema have always been helpful when I talk to them.
I've been exchanging emails with them. For a while I wasn't getting anywhere but in the end got the answer that they don't make the module or switch any more and so I'll have to convert to the PBK and remove the module. I'll only lose that one little feature which isn't really that important. I don't think it'll be that big of a deal.

Thanks for your help everyone. I'm going to place an order for 3 PBKs - two of my old switches have already failed so I assume the third isn't far behind. I'll just replace all 3.

Richard
__________________

Britannia is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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





All times are GMT -5. The time now is 07:37 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012