Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 06-11-2019, 14:09   #1
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Question on adding gas to BD35 compressor

Hi, our fridge (Isotherm, Danfoss BD35 with a thin evaporator plate), is not cooling well. There is only frost on 50% of the plate and it's only using 2 and a bit amps. From all the wisdom gleaned from this site, this suggests low on refrigerant. The performance has gone down very slowly over the last year.

I guess it has a small leak, possibly from the quick connectors, which I cannot sort right now, maybe in a couple of months.

I think I will try adding a little gas, and before I buy a charging hose and some R134a, I just wanted to ask you wise people if a standard hose will connect to the can of 134a in the pic below and then to my compressor's service port on the BD 35 (also pictured with green dust seal on it).

No adaptors needed?
Attached Thumbnails
Click image for larger version

Name:	fridge 2.jpg
Views:	61
Size:	429.7 KB
ID:	202757   Click image for larger version

Name:	Screenshot from 2019-11-07 07-54-28.png
Views:	56
Size:	106.3 KB
ID:	202759  

__________________

Warby12 is offline   Reply With Quote
Old 06-11-2019, 20:38   #2
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Oh yeah, I also trouble shot by bypassing the thermostat, checking voltage, checking field windings and earth leaks on the compressor terminals, and swapping in known good controller module. I've done my best
In quite hot weather today (30C) with thermostat bypassed, it's run hard and well but with low amps and 50% frost.


So what hose do I need, if anyone knows?
__________________

Warby12 is offline   Reply With Quote
Old 07-11-2019, 17:03   #3
Registered User

Join Date: Jun 2019
Posts: 54
Re: Question on adding gas to BD35 compressor

The fitting on the unit is 1/4" male flare.
you need a gauge set that allows you to get from the can you posted to the fitting on the unit, its under the green shrink wrap, while being able to control the flow of refrigerant into the system.
Coolerking is offline   Reply With Quote
Old 07-11-2019, 17:36   #4
Registered User
 
wingssail's Avatar

Join Date: Jan 2010
Location: On Vessel WINGS, wherever there's an ocean, currently in Mexico
Boat: Serendipity 43
Posts: 1,245
Send a message via AIM to wingssail Send a message via Skype™ to wingssail
Re: Question on adding gas to BD35 compressor

Quote:
Originally Posted by Coolerking View Post
The fitting on the unit is 1/4" male flare.
you need a gauge set that allows you to get from the can you posted to the fitting on the unit, its under the green shrink wrap, while being able to control the flow of refrigerant into the system.
Take the dust cover off and inspect the fitting. Probably Coolerking is right, after all he is in the business, but mine was a simple shrader valve, and the store where I bought my can of R34a had a hose and gauge and an adapter that fit my shrader valve. I was able to screw on the adaptor the connect the hose and gauge, and proceed according to the instructions to refill my system.

Since your system is not totally empty maybe a shot of gas will do it. Try 3 seconds at a time and leave it for 10 minutes. It might take a few. Don't rush things, an over filled system can damage the compressor.

Put you fingers on the joints and fittings, if you find one which is oily, that's your leak. A small bit of tightening might cure it. Some people swear by "stop leak" but I don't know the long term consequences. Just putting in gas occasionally seems like a no-brainer to me.
__________________
Sailing is a sport, an athletic activity, not a sedentary one.
Fred Roswold-Fred & Judy, SV Wings, Mexico
http://wingssail.blogspot.com/
wingssail is offline   Reply With Quote
Old 07-11-2019, 17:44   #5
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Thanks Coolerking, from what I can understand the r134a can (on order) has a 1/2" acme thread and as you say the unit has a 1/4" male flare. Just gotta get a hose to connect them with a valve on the can end of course.



Do I need any odd adaptors for the gauge set?


(This is just to get us home, where I'll have it leak tested and regassed by a refrigeration guy)
Warby12 is offline   Reply With Quote
Old 07-11-2019, 19:46   #6
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Hi wingssail, Yes it's definitely a schrader valve. I took the dust cover off and it measures 11mm (or 7/16ths approx) across the thread. Seems a bit big for 1/4"?

I am will dig deeper. I need to order something soon as it's getting hotter and we won't be near reliable help for a few weeks at least.

Thanks for your help
Attached Thumbnails
Click image for larger version

Name:	IMG_0171.jpg
Views:	34
Size:	404.9 KB
ID:	202807  
Warby12 is offline   Reply With Quote
Old 07-11-2019, 21:45   #7
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 2,068
Re: Question on adding gas to BD35 compressor

Don't get terms confused, a Schrader valve is actually smaller and finer threads. It is the standard valve on automobile tires (and many bicycles).

A 1/4" SAE flare uses a 7/16-20 male thread. That's a 1/4" SAE flare (with a small cap on the flare).
Dsanduril is offline   Reply With Quote
Old 07-11-2019, 22:18   #8
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 2,068
Re: Question on adding gas to BD35 compressor

Or it's new enough that the black is a Flare Seal.
Dsanduril is offline   Reply With Quote
Old 07-11-2019, 22:25   #9
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Got it! That makes more sense (confusing)



Thanks guys, I've done an order, fingers crossed.
Warby12 is offline   Reply With Quote
Old 08-11-2019, 01:22   #10
Registered User
 
wingssail's Avatar

Join Date: Jan 2010
Location: On Vessel WINGS, wherever there's an ocean, currently in Mexico
Boat: Serendipity 43
Posts: 1,245
Send a message via AIM to wingssail Send a message via Skype™ to wingssail
Re: Question on adding gas to BD35 compressor

Quote:
Originally Posted by Warby12 View Post
Hi wingssail, Yes it's definitely a schrader valve. I took the dust cover off and it measures 11mm (or 7/16ths approx) across the thread. Seems a bit big for 1/4"?

I am will dig deeper. I need to order something soon as it's getting hotter and we won't be near reliable help for a few weeks at least.

Thanks for your help
Yes, I recognize this fitting. Right now I don't know what it is called (It is 2:00am and I have been into the rum tonight) so you have to get to a store or find out the name of this kind of fitting.

That is a common fitting.
__________________
Sailing is a sport, an athletic activity, not a sedentary one.
Fred Roswold-Fred & Judy, SV Wings, Mexico
http://wingssail.blogspot.com/
wingssail is offline   Reply With Quote
Old 08-11-2019, 09:04   #11
Registered User

Join Date: Jun 2019
Posts: 54
Re: Question on adding gas to BD35 compressor

The black rubber o-ring is meant to stay in the cap, take it off the fitting before you attach the gauges.
Coolerking is offline   Reply With Quote
Old 08-11-2019, 13:03   #12
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Quote:
Originally Posted by Coolerking View Post
The black rubber o-ring is meant to stay in the cap, take it off the fitting before you attach the gauges.

Thanks for that, I did wonder
Warby12 is offline   Reply With Quote
Old 08-11-2019, 13:08   #13
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,758
Re: Question on adding gas to BD35 compressor

Can’t you reach the quick connectors? All you need to do is take them apart, replace the O-ring and screw them back together. When that’s done, top up the gas and you should be good to go
s/v Jedi is offline   Reply With Quote
Old 09-11-2019, 14:11   #14
Registered User
 
Warby12's Avatar

Join Date: Apr 2013
Location: Southern Hemisphere
Boat: Wauquiez Amphitrite 43 Ketch
Posts: 335
Re: Question on adding gas to BD35 compressor

Hi S/V Jedi, the connectors are behind some cabinetry, (which I put in ). I'll be cutting some access and leak testing them.


I will try and track down replacement o-rings to have them ready for the evacuation to come.
Warby12 is offline   Reply With Quote
Old 09-11-2019, 15:02   #15
Registered User
 
wingssail's Avatar

Join Date: Jan 2010
Location: On Vessel WINGS, wherever there's an ocean, currently in Mexico
Boat: Serendipity 43
Posts: 1,245
Send a message via AIM to wingssail Send a message via Skype™ to wingssail
Re: Question on adding gas to BD35 compressor

Quote:
Originally Posted by Warby12 View Post
Hi S/V Jedi, the connectors are behind some cabinetry, (which I put in ). I'll be cutting some access and leak testing them.
I will try and track down replacement o-rings to have them ready for the evacuation to come.
My point above is that since your unit is still partially working I'd suspect that a shot or three of gas will put you right. I would not take apart the quick disconnect fittings unless you are equipped to vacuum the system and completely refill it. Plus, of a certain age the fittings are not reusable without gas loss at least.

A real easy leak check is to wipe the fittings with your finger. The gas has oil in it and if it is leaking out there will be wet oil on the fitting, usually the high pressure side. Even then, you could stop the leak with a little tightening of the fitting (use care and two wrenches so as not to break the solder joints). AND they sell stop leak which is supposed to be good.

So my recommendation is, do not open those fittings unless you have to.
__________________

__________________
Sailing is a sport, an athletic activity, not a sedentary one.
Fred Roswold-Fred & Judy, SV Wings, Mexico
http://wingssail.blogspot.com/
wingssail is offline   Reply With Quote
Reply

Tags
compressor

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
BD35 compressor not making frost on plate . ColdEH Plumbing Systems and Fixtures 74 31-10-2019 11:54
Danfoss bd35 compressor economy mode Dod42 Electrical: Batteries, Generators & Solar 14 10-07-2014 07:18
How to disconnect R-12 gas hoses from my engine driven fridge compressor? jipcho Plumbing Systems and Fixtures 14 20-01-2014 22:34
Air-Cooled Compressor vs Air/Water-Cooled Compressor melidramatic Plumbing Systems and Fixtures 4 06-02-2011 08:35
Adding electric compressor to engine-driven fridge? bene505 Plumbing Systems and Fixtures 4 01-03-2009 20:23

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:38.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.