Date   
Re: [Amel Yacht Owners] Repower questions

karkauai
 

Hi Bill, I repowered 4 1/2 years ago replaced Volvo TMD22 78 HP with Yanmar 4JH4HTE 110HP (the 4JH3 100HP was replaced by the 4JH4).  The new engine dropped right in, required new mounting holes in the angle-iron engine bed,  and needed risers between the angle iron and the engine to fit well.  The forward risers were ~2” high and the aft ones ~4”.  The vertical side of the inboard angle iron had to be cut to fit around the oil filter.
I still have the original transmission.  Amel apparently beefed up the drive train sometime before SM243, they said that I could use the same transmission and that the  C drive is beefy enough for the 110.

The raw water pump and starter are on the outboard side and difficult but not impossible to get to.  I’m considering a separate raw water pump in the intake line so that the impeller can be changed quickly if necessary.

I am using the same MaxProp I had with the old Volvo, repitched for the Yanmar.  I cruise at 6 kts at 2200rpm.  Plenty of power to spare!  I haven’t run it long enough to have an accurate idea of efficiency, but it seems I burn just a little more with the Yanmar.

Sound and vibration are less with the new engine, presumably because the old engine mounts were on their last legs.  Yamaha said you need to use Yamaha engine mounts or the warranty is void.  I installed the new mounts one at a time using the old mounts and angle iron frame to get them mounted in the right place.  It was a good fit and not difficult.

I love Yanni Yamaha Sr, wouldn’t go back to Victor Volvo for any amount of money.  For what it’s worth, I traded in Harry Honda 4-stroke outboard for Yanni Yamaha Jr 2-stroke at about the same time and love how he cranks first pull every time for 4+ years now.

Hope that helps, ask if you need to know something else.

Kent Robertson
S/V Kristy
SM 243
karkauai at yahoo.com
USA 8282346819

On Jun 1, 2018, at 11:57 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

 

A few questions for those of you who have repowered a Super Maramu—especially those who swapped out a Volvo TMD22.

What new engine did you use?
Did you use the same Hurth 250 transmission?
Are you happy with the new installation?
Where there any serious issues or complications?
Approximate cost?

Bill Kinney
SM160, Harmonie
Central Chesapeake Bay, USA

Re: [Amel Yacht Owners] Re: Two questions

 

Ryan,

Let me give you the short answer:
The AC "Earth" is not part of the Amel Bonding system. The two systems were designed to stand alone. However, when Amel chose the Calpeda 220VAC Saltwater pump for Climma AC, an unintended connection between the two was created because AC Current safety necessitates that the steel pump case to be connected to Earth and electrolysis necessitates that the steel saltwater pump be connected to Bonding. Since the pump and motor are steel and connected to one another, there is a crossover between the two systems.

This situation is a good reason to install a March Mag-Drive Pump rather that a pump like the Capelda 220VAC pump. Coose that March pump wisely because of the normal unpainted steel on most of their pumps. If you buy one of these do something to mitigate rust/oxidation.

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus

Amel School  http://www.amelschool.com
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970





On Fri, Jun 1, 2018 at 12:29 PM, Ryan Meador ryan.d.meador@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Hi Bill,

Your post makes me wonder if I am misinformed.  I thought the AC ground (not the neutral) from the shore power cable was connected to the bonding system (possibly via a galvanic isolator, if your boat is so equipped).  Is that not the case?

Thanks,
Ryan and Kelly
SM 233 Iteration
Boston, MA, USA



On Fri, Jun 1, 2018 at 12:41 PM, Bill Rouse brouse@... [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:
 

Alan,

Good points.

All,

This "ground issue" gets very confusing to most people. Let me add to the confusion, or maybe add some humor...you be the judge:
  • The Amel Bonding System is NOT a GROUND.
  • Amel did not connect any electronic ground posts to the Amel Bonding system.
  • Further confusing the issue, Pouchon (Amel's electronics subcontractor) on some Amels connected a yellow/green wire to the ground terminal on some instruments, but terminated the other end without connection to anything. I have known some owners and some "expert" technicians to connect this yellow/green wire to the Amel Bonding System.
  • Raymarine has no idea what an Amel Bonding System is and really never defines "Ground" in any manual I have.
  • As someone who at a very young age (vacuum tube) built electronic radios, stereos, etc., I would connect the cases ("ground") of components together to reduce RFI.
  • I have no idea what Raymarine wishes to accomplish, but I assume that since they have to write manuals that are universal, they don't want a customer service issue for RFI. I have seen some RFI Floating Platforms disguised as cruising boats and when anchored nearby have been affected by the RFI they broadcast.. I assume Raymarine develops an installation manual that reduces customer service issues from even these RFI floating platforms.
I hope the above helps more than it hurts...if not, maybe it was entertaining.


On Fri, Jun 1, 2018 at 11:13 AM, osterberg.paul.l@gmail..com [amelyachtowners] <amelyachtowners@...om> wrote:
 

Herbert and Alan

Thank you, I will start by not connecting the shield then if I run into problem I know where to start digging
Paul on SY Kerpa SM 259




Re: [Amel Yacht Owners] Gas shut off

 

Pat,

I believe  that all electro-solenoid gas installations on SMs and 54s that I have seen are 3/8" pipe thread with a Burkert 6013 series solenoid valve.

See the attached.

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus

Amel School  http://www.amelschool.com
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970





On Fri, Jun 1, 2018 at 12:02 PM, Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Bill, I have been trying to see a photo of the galley area on another SM of my vintage,no luck. I think cannot find the power source and think I will just replace the switch and solenoid with 24v . Getting the right thread size may be a problem.

Thanks,
Pat


-----Original Message-----
From: Bill Rouse brouse@... [amelyachtowners] <amelyachtowners@yahoogroups.com>
To: amelyachtowners <amelyachtowners@yahoogroups.com>
Sent: Fri, Jun 1, 2018 12:02 pm
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Pat,

I believe your SM was modified. Other SMs the same vintage that I have seen had a manual valve. 

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550
+1(832) 380-4970

On Fri, Jun 1, 2018, 08:01 Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:
 
Kent, The solenoid is stamped 12v, originally I assumed it was 24v. I bought a more expensive tracer , but I can not get it to beep running the sensor all around the wires coming up into the compartment above the galley. I really wish all the wiring had been labeled. Is there a central point where 12v equipment is powered, like a buss bar somewhere. 
Thanks,
Pat SM#123


-----Original Message-----
From: Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@yahoogroups.com>
To: amelyachtowners <amelyachtowners@yahoogroups.com>
Sent: Fri, Jun 1, 2018 8:13 am
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Do you have power at the breaker on the 24v panel?  On Kristy the solenoid is 24v.

Kent Robertson
S/V Kristy
USA cell: 828-234-6819

On May 31, 2018, at 8:18 AM, sailw32@... [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

 
I am not getting any power to my propane switch. I bought a wire tracer and cannot trace the wire. The solenoid is 12v . Does anyone know where the 12v power source would originate? I could not find a 12v buss bar .. The solenoid works , I jumped it across the starter battery , with a meter I cannot find any voltage at the switch. It could be as simple as a blown fuse.
Thanks,
Pat SM#123


Re: [Amel Yacht Owners] Repower questions

greatketch@...
 

Ian,  

Thanks for that!  Hope the install goes smoothly and come in below budget!

Bill Kinney
SM160, Harmonie
Solomon’s Is, MD, USA

Re: [Amel Yacht Owners] Amel 54007: Gear Box Part Number

kurt.wetzel@...
 

Thank you very much Bill.
@SAV has nothing in stock at the moment.
As informed by Amel La Rochelle there is a delay in production.
That being the reason I posted this message on the forum.
Regards
Kurt
Hemera
AML54007E506

Re: [Amel Yacht Owners] Repower questions

ianjenkins1946 <ianjudyjenkins@hotmail.com>
 

Hi Bill,


I can answer all your questions in about two weeks time.  I am now 71 ( Judy is of course much younger) and hope to have at least ten more years afloat. You will have seen from past posts that we had an unhappy experience at the hands of the Volvo agent in Hyeres, leaving us with a large bill and an unhappy engine. We could persevere with our TMD but we want to go sailing rather than spending  time in marinas and money on mechanics so we have taken the plunge and as I write a new Volvo D2-75 is being installed in Piraeus by a guy whom I trust. He was originally trained by the Englishman who designed the TMD and when Volvo acquired the selling rights from Perkins he was sent to Sweden to show them how it worked.

 He was shocked by the work and cost carried out in Hyeres and encouraged me to complain to Volvo central from whom I hope to get some satisfaction.


The new engine is marginally smaller in size but with a 2.2 litre capacity ( 2 litre for the TMD) and 75hp at lower revs so NO SMOKE ! ( I am promised !). The exhaust is on the starboard side but the filters, to port , are more accessible. Rather than a marinised car engine ( TMD) it was built as a marine engine. Meets EU pollution regs.


 It does have a turbo, alas, but not the electronics that its bigger sister has, so you don't have to reach for a computer to fix it.  It comes with a choice of three gearboxes--I think the straight shaft exit one has been chosen.  The guy checked with Autoprop in the UK who  confirmed that it's a match. He has worked on Amels and I think he will do a good job.


 The engine comes with a standard instrument panel which is probably adequate, but as I like to have instruments showing engine temperature and 12v output I may fit the de luxe panel which has both of those plus oil pressure at an extra 300 euros or so. The total costs will be approaching 20,000 Euros.


It should do the trick. We will know in a couple of weeks time.


 Ian and Judy, Pen Azen, SM 302 Piraeus

 


From: amelyachtowners@... on behalf of greatketch@... [amelyachtowners]
Sent: 01 June 2018 15:57:26
To: amelyachtowners@...
Subject: [Amel Yacht Owners] Repower questions
 
A few questions for those of you who have repowered a Super Maramu—especially those who swapped out a Volvo TMD22.

What new engine did you use?
Did you use the same Hurth 250 transmission?
Are you happy with the new installation?
Where there any serious issues or complications?
Approximate cost?

Bill Kinney
SM160, Harmonie
Central Chesapeake Bay, USA

------------------------------------
Posted by: greatketch@...
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Volvo D3-110 won't start - instruments won't even light up?

cpp_berkeley <no_reply@...>
 

After a nice short day sail today, we were approaching Katakolo, Greece and I started the Volvo D3-110 (rev c) on my A54 and after a few minutes at idle, engaged into forward gear and about 30 seconds later, the motor died.


I tried to start it again but neither the EVC System Tachometer nor the Alarm Display lit up. So effectively the motor is not responding at all to the ignition key. Both of the 20 amp fuses on the motor are intact.


The starting battery is showing 12.9v and the genset, which I believe uses the same battery, started fine. 


Any ideas how I can start diagnosing this? 


Scott

SV Tengah

A54 #69

Re: [Amel Yacht Owners] Re: Two questions

Ryan Meador
 

Hi Bill,

Your post makes me wonder if I am misinformed.  I thought the AC ground (not the neutral) from the shore power cable was connected to the bonding system (possibly via a galvanic isolator, if your boat is so equipped).  Is that not the case?

Thanks,
Ryan and Kelly
SM 233 Iteration
Boston, MA, USA



On Fri, Jun 1, 2018 at 12:41 PM, Bill Rouse brouse@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Alan,

Good points.

All,

This "ground issue" gets very confusing to most people. Let me add to the confusion, or maybe add some humor...you be the judge:
  • The Amel Bonding System is NOT a GROUND.
  • Amel did not connect any electronic ground posts to the Amel Bonding system.
  • Further confusing the issue, Pouchon (Amel's electronics subcontractor) on some Amels connected a yellow/green wire to the ground terminal on some instruments, but terminated the other end without connection to anything. I have known some owners and some "expert" technicians to connect this yellow/green wire to the Amel Bonding System.
  • Raymarine has no idea what an Amel Bonding System is and really never defines "Ground" in any manual I have.
  • As someone who at a very young age (vacuum tube) built electronic radios, stereos, etc., I would connect the cases ("ground") of components together to reduce RFI.
  • I have no idea what Raymarine wishes to accomplish, but I assume that since they have to write manuals that are universal, they don't want a customer service issue for RFI. I have seen some RFI Floating Platforms disguised as cruising boats and when anchored nearby have been affected by the RFI they broadcast. I assume Raymarine develops an installation manual that reduces customer service issues from even these RFI floating platforms.
I hope the above helps more than it hurts...if not, maybe it was entertaining.


On Fri, Jun 1, 2018 at 11:13 AM, osterberg.paul.l@... [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:
 

Herbert and Alan

Thank you, I will start by not connecting the shield then if I run into problem I know where to start digging
Paul on SY Kerpa SM 259



Heat Exchanger

Patrick McAneny
 

I have had my heat exchanger off several times over the years ,and reinstalled it as the previous owner had and not questioned it ,until now. I have had an overheating issue for years and am resolved to solve it . The previous owner applied silicone on the end caps to seal them. Is this normally done? When I just removed the H/E I found that as I pushed the cap on the last time ,the silicone was pushed back and covered better than 50% of one of the four holes and about 25%of another. Which brings me to another question. Is the antifreeze forced through the holes or does it just come into contact with the tubes as it moves along with the flow,I assume the later.

Thanks,

Pat

SM Shenanigans #123

Re: [Amel Yacht Owners] Re: Gas shut off [1 Attachment]

Patrick McAneny
 

Mark, As Bill just suggested ,this may have been installed by the previous owner. There is no 12 or 24 breaker that I can find, just going to redo it in 24v.,moving on to other problems.
Thanks,
Pat


-----Original Message-----
From: mfmcgovern@... [amelyachtowners]
To: amelyachtowners Sent: Fri, Jun 1, 2018 12:13 pm
Subject: [Amel Yacht Owners] Re: Gas shut off [1 Attachment]

 
[Attachment(s) from mfmcgovern@... [amelyachtowners] included below]
Pat,

For what it's worth, I was poking around my propane locker last weekend and took some pics of the gas shutoff solenoid.  I have attached a picture of the Burkert part number 125301 solenoid label below.  The solenoid on my SM (Hull #440) is definitely a 24 Volt solenoid and is powered from the main 24V breaker panel.  It would seem very odd to me that Amel would have ever used a 12V solenoid for the gas shut off solenoid at any point in the building of SMs as I think they were built as 24V boats from the very beginning.  Someone with more knowledge/experience can correct me if I am wrong in that.

Regardless of whether it is 12v or 24V solenoid, Amel would have been required to put in some kind of switch in the galley in proximity to the stove to control the gas shutoff solenoid.  Does your main 24V panel have a breaker for the gas solenoid?  If so, that is where it gets it's power from and it would appear that someone replaced the 24V solenoid with a 12V solenoid.  That would obviously be bad as it would likely draw significantly more current than a 24V solenoid would assuming a similar coil resistance.

Mark McGovern
SM #440 Cara
Deale, MD USA

Re: [Amel Yacht Owners] Gas shut off

Patrick McAneny
 

Bill, I have been trying to see a photo of the galley area on another SM of my vintage,no luck. I think cannot find the power source and think I will just replace the switch and solenoid with 24v . Getting the right thread size may be a problem.
Thanks,
Pat


-----Original Message-----
From: Bill Rouse brouse@... [amelyachtowners]
To: amelyachtowners
Sent: Fri, Jun 1, 2018 12:02 pm
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Pat,

I believe your SM was modified. Other SMs the same vintage that I have seen had a manual valve. 

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550
+1(832) 380-4970

On Fri, Jun 1, 2018, 08:01 Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:
 
Kent, The solenoid is stamped 12v, originally I assumed it was 24v. I bought a more expensive tracer , but I can not get it to beep running the sensor all around the wires coming up into the compartment above the galley. I really wish all the wiring had been labeled. Is there a central point where 12v equipment is powered, like a buss bar somewhere. 
Thanks,
Pat SM#123


-----Original Message-----
From: Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Fri, Jun 1, 2018 8:13 am
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Do you have power at the breaker on the 24v panel?  On Kristy the solenoid is 24v.

Kent Robertson
S/V Kristy
USA cell: 828-234-6819

On May 31, 2018, at 8:18 AM, sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 
I am not getting any power to my propane switch. I bought a wire tracer and cannot trace the wire. The solenoid is 12v . Does anyone know where the 12v power source would originate? I could not find a 12v buss bar .. The solenoid works , I jumped it across the starter battery , with a meter I cannot find any voltage at the switch. It could be as simple as a blown fuse.
Thanks,
Pat SM#123

Re: [Amel Yacht Owners] Re: Two questions

 

Alan,

Good points.

All,

This "ground issue" gets very confusing to most people. Let me add to the confusion, or maybe add some humor...you be the judge:
  • The Amel Bonding System is NOT a GROUND.
  • Amel did not connect any electronic ground posts to the Amel Bonding system.
  • Further confusing the issue, Pouchon (Amel's electronics subcontractor) on some Amels connected a yellow/green wire to the ground terminal on some instruments, but terminated the other end without connection to anything. I have known some owners and some "expert" technicians to connect this yellow/green wire to the Amel Bonding System.
  • Raymarine has no idea what an Amel Bonding System is and really never defines "Ground" in any manual I have.
  • As someone who at a very young age (vacuum tube) built electronic radios, stereos, etc., I would connect the cases ("ground") of components together to reduce RFI.
  • I have no idea what Raymarine wishes to accomplish, but I assume that since they have to write manuals that are universal, they don't want a customer service issue for RFI. I have seen some RFI Floating Platforms disguised as cruising boats and when anchored nearby have been affected by the RFI they broadcast. I assume Raymarine develops an installation manual that reduces customer service issues from even these RFI floating platforms.
I hope the above helps more than it hurts...if not, maybe it was entertaining.

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus

Amel School  http://www.amelschool.com
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970





On Fri, Jun 1, 2018 at 11:13 AM, osterberg.paul.l@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Herbert and Alan

Thank you, I will start by not connecting the shield then if I run into problem I know where to start digging
Paul on SY Kerpa SM 259


Re: Two questions

Paul Osterberg
 

Herbert and Alan
Thank you, I will start by not connecting the shield then if I run into problem I know where to start digging
Paul on SY Kerpa SM 259

Re: Gas shut off

mfmcgovern@...
 

Pat,

For what it's worth, I was poking around my propane locker last weekend and took some pics of the gas shutoff solenoid.  I have attached a picture of the Burkert part number 125301 solenoid label below.  The solenoid on my SM (Hull #440) is definitely a 24 Volt solenoid and is powered from the main 24V breaker panel.  It would seem very odd to me that Amel would have ever used a 12V solenoid for the gas shut off solenoid at any point in the building of SMs as I think they were built as 24V boats from the very beginning.  Someone with more knowledge/experience can correct me if I am wrong in that.

Regardless of whether it is 12v or 24V solenoid, Amel would have been required to put in some kind of switch in the galley in proximity to the stove to control the gas shutoff solenoid.  Does your main 24V panel have a breaker for the gas solenoid?  If so, that is where it gets it's power from and it would appear that someone replaced the 24V solenoid with a 12V solenoid.  That would obviously be bad as it would likely draw significantly more current than a 24V solenoid would assuming a similar coil resistance.

Mark McGovern
SM #440 Cara
Deale, MD USA

Re: [Amel Yacht Owners] Amel 54007: Gear Box Part Number

 

SAV@... has them in stock. Caution, there is more than one model gear box on the 54. Include a photo and hull number when ordering. 

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550
+1(832) 380-4970


On Fri, Jun 1, 2018, 06:42 kurt.wetzel@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Dear All
The gearbox of the boom on my Amel 54 is broken. Can anyone provide me with the part and fabrication numbers?
Thank you very much
Kurt and Junita
SY Hemera
Flag Malta
MMSI 215000349
Current Location Greece, Lavrion


Re: [Amel Yacht Owners] Gas shut off

 

Pat,

I believe your SM was modified. Other SMs the same vintage that I have seen had a manual valve. 

Best,

CW Bill Rouse
Admiral, Texas Navy
Commander Emeritus
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550
+1(832) 380-4970


On Fri, Jun 1, 2018, 08:01 Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Kent, The solenoid is stamped 12v, originally I assumed it was 24v. I bought a more expensive tracer , but I can not get it to beep running the sensor all around the wires coming up into the compartment above the galley. I really wish all the wiring had been labeled. Is there a central point where 12v equipment is powered, like a buss bar somewhere. 

Thanks,
Pat SM#123


-----Original Message-----
From: Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Fri, Jun 1, 2018 8:13 am
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Do you have power at the breaker on the 24v panel?  On Kristy the solenoid is 24v.

Kent Robertson
S/V Kristy
USA cell: 828-234-6819

On May 31, 2018, at 8:18 AM, sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 
I am not getting any power to my propane switch. I bought a wire tracer and cannot trace the wire. The solenoid is 12v . Does anyone know where the 12v power source would originate? I could not find a 12v buss bar . The solenoid works , I jumped it across the starter battery , with a meter I cannot find any voltage at the switch. It could be as simple as a blown fuse.
Thanks,
Pat SM#123

Repower questions

greatketch@...
 

A few questions for those of you who have repowered a Super Maramu—especially those who swapped out a Volvo TMD22.

What new engine did you use?
Did you use the same Hurth 250 transmission?
Are you happy with the new installation?
Where there any serious issues or complications?
Approximate cost?

Bill Kinney
SM160, Harmonie
Central Chesapeake Bay, USA

Re: [Amel Yacht Owners] Re: Two questions

Ryan Meador
 

The drain and shield are connected together, and should be regarded as a single conductor.  The drain wire is a lot easier to attach to than the shield.

Maretron has this to say:
The NMEA 2000® network should be grounded at ONE location. Grounding at more than one location may produce ground loops, which can cause problems with communications on the network. In addition to the ground wire, connect the drain or SHIELD wire at the supply ground location and NO other place.

I take this to mean both ground and drain should be connected to the output of the 12V converter that is powering the system, which is the way it is set up on my boat.  This also matches general electrical engineering practice.

Part of the confusion I think is the use of the term "ground" for too many things.  Every circuit has a chosen point that is the zero-volt reference, and this is called ground.  The shield must be connected to the reference point of the power and signal wires to be effective.  But on an Amel, we also have the 24VDC ground and the AC ground, which are all distinct.  We even often call the DC ground by the slightly-inaccurate name "DC negative" to emphasize that it isn't connected to the AC ground.

Ryan and Kelly
SM 233 Iteration
Boston, MA, USA



On Fri, Jun 1, 2018 at 4:11 AM, divanz620@... [amelyachtowners] <amelyachtowners@...> wrote:
 

In the NMEA 2000 scheme there is a DRAIN wire and a SHIELD.

The recommendation is that both should be connected to GROUND at ONE POINT ONLY.
Problems have been caused it seems by earth loops where the drain and / or shield have been grounded at more than one point.
On most boats the ground connection is connected to battery -ve which maybe the cause of these earth loop problems as they now effectively have multiple ground connections.
Amel boats do not have a connection between battery -ve and ground.
So on our boats, my instinct tells me that the drain and ground should be connected to ships ground to eliminate interference problems from RF....from VHF or SSB for example 
However if the NMEA 2000 system has issues as you have said, then disconnecting that ground connection is not going to harm anything....and if there are issues it may be worth disconnecting the drain or ground from ships ground to see if either makes any difference. In any event you won't damage any equipment by doing that.
Just what I think...I may be wrong...it has been known !
Cheers
Alan
Elyse SM437
Malumu Bay, Beqa


Re: [Amel Yacht Owners] Gas shut off

karkauai
 

If it’s 12v, it would have to be powered by the 24-12 converters or the starting battery, Pat.  On Kristy there’s a breaker for it on the 24v panel with a light that indicates it’s on.

Kent
S/V Kristy
SM243

On Jun 1, 2018, at 8:59 AM, Patrick Mcaneny sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 

Kent, The solenoid is stamped 12v, originally I assumed it was 24v. I bought a more expensive tracer , but I can not get it to beep running the sensor all around the wires coming up into the compartment above the galley. I really wish all the wiring had been labeled. Is there a central point where 12v equipment is powered, like a buss bar somewhere. 

Thanks,
Pat SM#123


-----Original Message-----
From: Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Fri, Jun 1, 2018 8:13 am
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Do you have power at the breaker on the 24v panel?  On Kristy the solenoid is 24v.

Kent Robertson
S/V Kristy
USA cell: 828-234-6819

On May 31, 2018, at 8:18 AM, sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 
I am not getting any power to my propane switch. I bought a wire tracer and cannot trace the wire. The solenoid is 12v . Does anyone know where the 12v power source would originate? I could not find a 12v buss bar . The solenoid works , I jumped it across the starter battery , with a meter I cannot find any voltage at the switch. It could be as simple as a blown fuse.
Thanks,
Pat SM#123

Re: [Amel Yacht Owners] Gas shut off

Patrick McAneny
 

Kent, The solenoid is stamped 12v, originally I assumed it was 24v. I bought a more expensive tracer , but I can not get it to beep running the sensor all around the wires coming up into the compartment above the galley. I really wish all the wiring had been labeled. Is there a central point where 12v equipment is powered, like a buss bar somewhere. 
Thanks,
Pat SM#123


-----Original Message-----
From: Kent Robertson karkauai@... [amelyachtowners]
To: amelyachtowners
Sent: Fri, Jun 1, 2018 8:13 am
Subject: Re: [Amel Yacht Owners] Gas shut off

 
Do you have power at the breaker on the 24v panel?  On Kristy the solenoid is 24v.

Kent Robertson
S/V Kristy
USA cell: 828-234-6819

On May 31, 2018, at 8:18 AM, sailw32@... [amelyachtowners] <amelyachtowners@...> wrote:

 
I am not getting any power to my propane switch. I bought a wire tracer and cannot trace the wire. The solenoid is 12v . Does anyone know where the 12v power source would originate? I could not find a 12v buss bar . The solenoid works , I jumped it across the starter battery , with a meter I cannot find any voltage at the switch. It could be as simple as a blown fuse.
Thanks,
Pat SM#123