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  2. [Amel Yacht Owners] Bow-Truster overheat

Re: [Amel Yacht Owners] Bow-Truster overheat

Mohammad Shirloo
 

Hi Thomas;
 
Your fuse may have been added on because I've heard some surveyors and insurance companies regard this situation as unsafe and will require the fuse to be added. I'm pretty sure that we were told by Olivier during our survey that the bow thruster is directly connected to the batteries. When I inquired about the reason, I believe the response was that Amel felt that the safety of the boat, when absolutely needing the bow thruster to be operational, was more important than the possibility of the bow thruster being damaged due to overuse.
 
The emergency disconnect is a manually operated switch which would require intervention form a person to stop current flowing to the bow thruster.
 
Respectfully;
Mohammad and Aty
B&B Kokomo
Amel 54 #099
 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, June 27, 2018 2:01 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Bow-Truster overheat

 


Hi Mohammad,

On Garulfo (54-122) there is also a 425A fuse on the positive cable and an emergency disconnect (big red button), both housed in the box inside the forward locker. 

I recently found the emergency disconnect to be rusted frozen so it's on the list for replacement. 

I would encourage others to test the emergency disconnect as it has a carbon steel backing plate and is mounted without any kind of waterproofing so is bound to rust. 

Fair winds,

Thomas 
GARULFO
A54-122
Curacao 


On Wed, 27 Jun 2018 at 19:27, 'Mohammad Shirloo' mshirloo@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Hello Reudi;
 
Yes, the Amel 54 has a thermal cutoff to prevent damage to the thruster as well as continuous high current draw (Around 550 Amps at 24V) which could lead to fire on board. We've had the thermal cutoff kick in  only a couple of times and it has reset in a matter of minutes. We have not timed the exact reset duration.
 
I'm not aware of any adjustments in the thermal cutoff. The bow thruster has a direct connection to the batteries without a breaker. The thermal cutoff is the only safety items preventing major damage to the thruster and/or wiring.
 
Try to use the thruster in bursts (less than 15 seconds), as much as possible, so it has time to cool down between usage. We try to over correct a bit when we use use the BT so as the bow falls off, the BT has more time to cool.
 
Respectfully;
Mohammad Shirloo
323-633-2222 Cell
310-644-0908 Fax
 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, June 27, 2018 9:58 AM
To: amelyachtowners@...


Subject: [Amel Yacht Owners] Bow-Truster overheat


 

Dear Forum

On my Amel-54 I discovered that the bow truster stops working after repeatingly use within 10-15 min timeframe.

I used the bow truster a bit more than usual when I practiced some manouvers first time; - and on a second occation when I had to manouver in a marina with a lot of windguests of 18+ kn and another chain over my Anker.

It stopped working and after a while (maybe 10 min.) it re-started & operated normaly. I know BT Is not made for constant use, - only few seconds at a time. Then wait and re-use another time.

Question from a beginner:

Does the bow truster has a termic fuse which is activated after some time of usage to save the motor from overheating? 

Does anyone know exactly how it works and if this can be adjusted because I think the BT on Wasabi switches of quite fast. Any ideas or other information?

Best regards

Ruedi

SY Wasabi A54#55

Sailing Cyclades GR.
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