SeaKnots

The freezer on my Oceanis 40 runs great, but never cycles off.  The thermostat is a Vitrofrigo, just replaced it.  The compressor is a Danfoss BD35F.  Any suggestions / solutions?

Views: 123

Replies to This Discussion

It could possibly be something stuck in the "open" position.  Thermostatic expansion valve?

It's been a while since I had that class in marine engineering.  You can google this, It not too different from an A/C system.

Good luck.

Thanks for the suggestion, I’ll check that out.

We experienced the same thing on our B43 (now sold and gone). We were living aboard and cruising with a fairly full freezer. Like you did I changed out the thermostat without success. I wrote it off to the poorly insulated freezer compartment but always wondered if there wasn't a bigger issue. The good news is that the Danfoss compressors are quite happy to run constantly with no reliability issues. 

Good luck and enjoy the boat.

Mike

Hey Mike - I agree with you that there is no physical problem with the unit running.  My problem is the drain on the battery.  As a weekend / once / twice a year cruiser, I don’t have solar to recharge my batteries (yet).  I have my doubts that it’s the insulation as it freezes the items in the freezer easily and can frost them up if let to run for days at a time.  My current thinking is that I think it’s something mechanical or the controller.  Last weekend I found the evaporator for both the freezer and fridge are both heavily crusted with dust from 10 years of use.  To clean this the challenge is trying to determine how to get to the coil to clean it. The wood louvers in the cabinetry don’t appear to be removable like the A/C returns.  The only other option I currently see is to remove the evaporator which may mean removing the entire condensing assembly.  

Cheers,

Cam

Cam, keeping the coils clean is essential to max efficiency for both units. For whatever reason our 43 required constant upkeep to keep the coils clean. The wood grates are glued on but can be removed if you work at it using a tool that won't mark the wood. I started at a corner and gently pried a little at a time working my way around and back and forth until they came off. I was able to push them back in place and have them stay put. Once the grills are off you can use a small painters brush to clean the coils. A vacuum cleaner helps. As do pipe cleaners and a flashlight. I'd turn both units off until they're clean to prevent any tool you're using from jamming up the cooling fan blades. 

I also installed two stainless vents, one above each compressor, to allow the heat to escape. There's an opening at the back of the box they sit in but I found it was better to vent directly above each unit.

Another thing you can do is buy a small wire rack to sit in the bottom of the freezer. I bought one with a painted finish, then cut the legs so the rack sat apx 1" off the bottom. This will allow for some air flow which will help keep items frozen all the way around. 

While you're working on the units inspect the connectors for the 12V feed to the compressors. They have a voltage drop across them and tend to heat up which breaks down the connection, causing more heat, more voltage drop and so on.

Lots of little things add up to greater efficiency.

I hope this helps.

Mike

Mike - great information!  I was hoping that there is a way to remove the wood grills. What type of tool did you find worked that didn’t damage the wood?  

Cam, I used a wide, flat blade screw driver to pry it off. I took my time and made sure I wasn't forcing it and causing any dents or scratches. It took a little while to do but when done I had good access to the coils. One of the grills would push back into place and stay put. The other would not stay put so I folded a small piece of paper (1/2" square) and folded it to create a wedge. Simply set it on the recessed edge and push the grill into place. The paper should hold it there until you pull it off for cleaning.

Take your time and be careful not to force anything.

Good luck

Mike

Thanks for the details, this really helps. It will be a few weeks before I get a chance to tackle this. 

Fair winds!

Cam

Mike nails the freezer (and Refrigerator) item. Remove the woodencovers on the vents, and if they have never been off you will most likely find a carpet of dust/hair/lint. I drilled small screw holes and added screws to re-attach. Now it is a bi-monthly service item. I use a dental instrument that has a soft brush about an eighth of an inch in diameter. The head brushes are disposable.

I also added much insulation to the freezer, having removed the oven/stove and drilling holes to gain access  the outboard side. Also pulled the refrigerator out and added a damn under the bottom of the freezer and then filled that area with foam also. I have the two cabin with the aft galley.

Sam

s/v LONGHAWK b43, Hull#9

Sam - thanks for the additional detail on the insulation. 

Seems there are two issue:

1.  Poorly insulated (for sure behind the refrigerator)

2.  Periodic coil cleaning, is required.

I have am considering spray-in insulation - any recommendations are welcome?

How did you remove the wood panels to gain access to the coils? 

RSS

Latest Activity

GaryG added a discussion to the group Beneteau 40 & 43
Thumbnail

B 40. Jib furler line

i would like to replace the jib furling line on my B40.  I believe the diameter is 5/16” but do not know the length. Does anyone have this info.?See More
Jul 3
James Taylor replied to Jem's discussion Hydraulic steering ram in the group Beneteau 40 & 43
"we had this same hydraulic drive on our 2008 B43. I agree with Jeff Shukis. This is a really nice hydraulic drive. It was extremely reliable and of sturdy construction. Well worth repairing if possible."
Jun 26
Klaas Nijhuis commented on Bradley A Destache's group ISLANDER FREEPORT 41 OWNERS
"Can anyone tell me if this is normal?  Pre-purchase survey indicated: "The aft lower shroud chain plates for the main mast are not installed with the same orientation on the vessel. The starboard side chain plate is installed in a side to…"
Jun 26
Klaas Nijhuis joined Bradley A Destache's group
Thumbnail

ISLANDER FREEPORT 41 OWNERS

Just a fun place to hang out our photos and videos.See More
Jun 26
John Hanrahan replied to Jem's discussion Hydraulic steering ram in the group Beneteau 40 & 43
"Dave you can get the gasket repair kit from PYI in Washington at the website…"
Jun 25
Jeff Shukis replied to Jem's discussion Hydraulic steering ram in the group Beneteau 40 & 43
"Yes, It's an L&S (Lecomble and Schmitt) 40 ST.…"
Jun 25
Jem added a discussion to the group Beneteau 40 & 43
Thumbnail

Hydraulic steering ram

Dave Shore asksDoes anyone know the manufacturer of the hydraulic auto helm installed on some B43's? The piston on mine has a leak on the bottom where the mounting pole sits. Looks like the packing or o-ring fell apart.My French built 2007 Oceanis 40 has a type 2 linear drive contact isThierry ETCHETO Responsable Vente France +33 (0) 559 562 646+33 (0) 682 828 050+33 (0) 559 569 571commercial2@ls-france.comLECOMBLE & SCHMITT SAS - BP N° 2 - 156 route de Briscous - 64240 Urt - France…See More
Jun 25
zeehag left a comment for ___/)ances With Sails
"hay you  still alive and sailing????  miss our   chats.. have a great summer"
Jun 25
ADVERTISE ON SEAKNOTS CONTACT US AT: 
candrac@sailforwater.com

© 2019   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service