Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 27-04-2010, 17:31   #16
Registered User
 
bill good's Avatar

Join Date: Oct 2006
Location: Brisbane Australia
Boat: sold
Posts: 721
sounds a bit wrong if the unit has 2X HP pump motors of the same type one 3A & the other 20A driving a common shaft. What does the delivery pump do if it run on its own? (i.e. hook up a hose to outside, pump water check current & If the thermal protection operates then it is faulty for sure.
(I don't know the unit you have)
__________________

__________________
bill good is offline   Reply With Quote
Old 27-04-2010, 17:41   #17
Registered User

Join Date: Apr 2010
Location: On board Beesmej; currently in the BVIs
Boat: Manta42 Beesmej
Posts: 8
I will take this up with VM.
__________________

__________________
drblogan is offline   Reply With Quote
Old 09-08-2013, 10:44   #18
Registered User

Join Date: Jan 2006
Location: Rhode Island
Boat: Tayana FD-12
Posts: 612
Images: 6
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Quote:
Originally Posted by TaoJones View Post
According to this, Dr. Logan, the 4105-501 is spec'ed for intermittent duty: 4105 Series > General Purpose Pumps > Marine > Flojet - ITT.

TaoJones
I am trying to figure out the same thing. Feed pump overheated last night after 20 minutes. I have 4125-502. According to this catalog section, motor is continuous duty...
I have a pressure gauge instead of vacuum gauge between pre-filter and high pressure pump. It was continuously at 40psi for the duration of the runtime. Perhaps this pump is too much for my HP pump(Cat 290). Brine flow was 3.5 GPM
Attached Thumbnails
Click image for larger version

Name:	Untitled.png
Views:	81
Size:	132.5 KB
ID:	65317  
__________________
phorvati is offline   Reply With Quote
Old 09-08-2013, 14:55   #19
Registered User
 
bill good's Avatar

Join Date: Oct 2006
Location: Brisbane Australia
Boat: sold
Posts: 721
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Bet the air temps are well above the 25 deg for the continious run specs. Try a computer cooling fan to reduce the heat. Water cool by passing inlet water thru a coil of copper around the body of the motor?
Regards Bill
__________________
bill good is offline   Reply With Quote
Old 12-08-2013, 10:45   #20
Registered User

Join Date: Jan 2006
Location: Rhode Island
Boat: Tayana FD-12
Posts: 612
Images: 6
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Quote:
Originally Posted by bill good View Post
Bet the air temps are well above the 25 deg for the continious run specs. Try a computer cooling fan to reduce the heat. Water cool by passing inlet water thru a coil of copper around the body of the motor?
Regards Bill
I'll try that tonight. i would love to add large heat sink, but need to machine it so that it optimizes the contact surface to the body of the motor, then add a fan.
__________________
phorvati is offline   Reply With Quote
Old 12-08-2013, 15:34   #21
Registered User
 
bill good's Avatar

Join Date: Oct 2006
Location: Brisbane Australia
Boat: sold
Posts: 721
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Try to run first up in the mornings before the day heats up? If the pump is working too hard for the flow required, some form of PWM speed control could be added.
Might work.

Regards Bill
__________________
bill good is offline   Reply With Quote
Old 16-08-2013, 08:02   #22
Registered User

Join Date: Jan 2006
Location: Rhode Island
Boat: Tayana FD-12
Posts: 612
Images: 6
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Quote:
Originally Posted by phorvati View Post
I am trying to figure out the same thing. Feed pump overheated last night after 20 minutes. I have 4125-502. According to this catalog section, motor is continuous duty...
I have a pressure gauge instead of vacuum gauge between pre-filter and high pressure pump. It was continuously at 40psi for the duration of the runtime. Perhaps this pump is too much for my HP pump(Cat 290). Brine flow was 3.5 GPM
So if the pump syas 25psi max, and i am getting 40psi at the output of 5 micron pre-filter, this tells me that the feed pump is overloaded. It makes sense why it overheated.
__________________
phorvati is offline   Reply With Quote
Old 27-08-2013, 10:20   #23
Registered User

Join Date: Jan 2006
Location: Rhode Island
Boat: Tayana FD-12
Posts: 612
Images: 6
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

Quote:
Originally Posted by bill good View Post
Bet the air temps are well above the 25 deg for the continious run specs. Try a computer cooling fan to reduce the heat. Water cool by passing inlet water thru a coil of copper around the body of the motor?
Regards Bill
So i made a copper loop around the motor, but i teed it off at the feed pump output then fed it back at the brine output after the flow meter.
Helped with two things, kept the pump cooler, and lowered the feed pressure from 40psi to about 35psi, eventually dropping to 30psi at the end of my water making run. Pump did not overheat this time. I think I will add a larger ID copper loop. Tubing that relieves the pressure is only 3/16" ID so pressure is still over 25psi max. IR thermometer showed about 5F lower temp with each copper loop. Highest point of the motor got to as hot at 130F. I think a PC fan will add a lot more cooling. But I gotta get the pressure to below 25PSI.
__________________
phorvati is offline   Reply With Quote
Old 27-08-2013, 15:05   #24
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: Bernard Logan - Watermaker Overheating, Shutting-Down

They do make heat sinks for a lot of these motors that just snap on. Also a cooling fan as mentioned above over the heat sink works wonders. But I do like the creativity of a water cooled heat sink.
Tellie is offline   Reply With Quote
Reply

Tags
overheating, watermaker

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
Overheating Volvo b-rad Engines and Propulsion Systems 3 19-03-2010 21:56
Overheating Yanmar? Zephyrus General Sailing Forum 4 05-10-2008 15:25
Overproped=Overheating jpv Propellers & Drive Systems 6 19-09-2007 13:26
Yanmar overheating seagypsywoman Construction, Maintenance & Refit 42 20-09-2006 14:41



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:43.


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.