Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-30-2017, 01:13 PM   #1
Veteran Member
 
City: Long Beach, CA
Country: USA
Vessel Name: Peterpan 111
Vessel Model: Gulfstar
Join Date: Apr 2013
Posts: 53
What happened

I just installed a new Raritan water heater , Yamaha 3HM35F engine. The electric works just fine, hot and cold water runs great. FW hoses are connected up. Couple of days later started engine and the alarm came on. Think did I connect the FW in and out correctly. Does it make any difference which way the FW flows through the heater? Could it be an airlock? If so what should I do. Appreciate any suggestions. Many thanks
__________________
Advertisement

Joew2604 is offline   Reply With Quote
Old 10-30-2017, 01:16 PM   #2
Guru
 
boathealer's Avatar
 
City: North Carolina
Country: US
Vessel Name: SCOUT
Vessel Model: Great Harbour N37
Join Date: Aug 2017
Posts: 556
Quote:
Originally Posted by Joew2604 View Post
I just installed a new Raritan water heater , Yamaha 3HM35F engine. The electric works just fine, hot and cold water runs great. FW hoses are connected up. Couple of days later started engine and the alarm came on. Think did I connect the FW in and out correctly. Does it make any difference which way the FW flows through the heater? Could it be an airlock? If so what should I do. Appreciate any suggestions. Many thanks
Probably an air lock. No difference in "direction" of flow.

Find the highest point in the entire engine/water heater system as a whole and bleed out any air.

If you didn't add any coolant, you'll probably need that, too, to account for the new hoses and exchanger volume.
__________________

__________________
--
Ray
m/v SCOUT Web Site
m/v SCOUT Projects Page
boathealer is offline   Reply With Quote
Old 10-30-2017, 01:33 PM   #3
Veteran Member
 
City: Long Beach, CA
Country: USA
Vessel Name: Peterpan 111
Vessel Model: Gulfstar
Join Date: Apr 2013
Posts: 53
Thank you for your reply
Joew2604 is offline   Reply With Quote
Old 10-30-2017, 04:43 PM   #4
TF Site Team
 
FlyWright's Avatar
 
City: California Delta and SF Bay
Country: Sacramento, CA, USA (boat in Vallejo)
Vessel Name: FlyWright
Vessel Model: Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 12,301
Along the lines of BH above, was the alarm sounding for engine heat? Have you checked the coolant level?

Let us know what you find.
__________________
My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al

@DeltaBridges - 25 Delta Bridges in 25 Days
FlyWright is offline   Reply With Quote
Old 10-31-2017, 10:05 AM   #5
Veteran Member
 
City: Long Beach, CA
Country: USA
Vessel Name: Peterpan 111
Vessel Model: Gulfstar
Join Date: Apr 2013
Posts: 53
Thanks all. Problem solved. The tank was full of coolant when I finished the job, but when I started the engine all the coolant went into the new hoses and heater coils leaving the tank almost empty. Topped off the coolant and all went well. Thanks again.
Joew2604 is offline   Reply With Quote
Old 11-02-2017, 06:27 AM   #6
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 19,657
Some of the HW tanks have an anti-scald valve built in that shuts down the circulating water at a preset temperature.

These do require the proper direction of engine circ water flow.

Do not put one of these in series with a box heater.
FF is offline   Reply With Quote
Old 11-02-2017, 06:46 AM   #7
Guru
 
boathealer's Avatar
 
City: North Carolina
Country: US
Vessel Name: SCOUT
Vessel Model: Great Harbour N37
Join Date: Aug 2017
Posts: 556
Quote:
Originally Posted by FF View Post
Some of the HW tanks have an anti-scald valve built in that shuts down the circulating water at a preset temperature.

These do require the proper direction of engine circ water flow.

Do not put one of these in series with a box heater.
Good point. Thanks.
__________________

boathealer is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 12:04 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×