Once the refrigerator is operating at the temperature you want, back off the setting a bit (we like to turn down the temperature to 4.5) to reduce compressor duty cycles. I assume you are talking about the "C" connection - suction. He's been RV'ing since 2002, is a certified RVIA Level 1 RV Technician, and has restored several Airstream travel trailers.

Here is the long awaited link for the recharging instructions. Louisiana Repeat the process as necessary until the system shows the symptoms of a correct charge as described in Section 1. Get it with Truck Camper Adventure's weekly newsletter. Connecting to the refrigeration system.First, you need to confirm that undercharged condition exists, and not a seriously overcharged one, as described in Section 1. So what are the operating numbers? Many thanks Rick.

The evaporator may appear and sound normal, but will be at a higher temperature than desired, resulting in longer than expected run times. Top manufacturers include Dometic, Norcold, Vitrifrigo, IsoTherm, and Nova Kool. Neither Danfoss nor Secop make refrigerators. This should allow some refrigerant gas to escape and maybe some refrigerant liquid. The purpose of this article is to provide a little history about the Danfoss DC compressor refrigerator, how it works, and the pros and cons of owning one. Photo by Charles J. Doane. If you have any problems you can give me a call I have a vac pump you could borrow if needed as I see you are local. The instructions for recharging are provided in this link in .pdf form Recharging a simple R134a.pdf, Toilets, holding tanks and associated matters, Bore glazing and polishing in diesel engines, Setting up your masthead standing rigging. R134a is available in small cans that enable topping up or recharging, both in its pure form for domestic systems or with added oil for automotive air conditioning units. Mike, excellent report on your CR-1110 refrigerator. For you, however, the choice might not be so easy. How much amperage does the DC compressor refrigerator typically consume? This power saving measure is especially useful during the night when the door isnt being opened as much as it is during the day. Nevada As the name implies, the key component that makes this type of refrigerator possible is the Danfoss BD35F compressor. Manitoba Colorado So what are the pros of the Danfoss DC compressor refrigerator? Owen holds the necessary qualifications for this activity. New Brunswick I purchased r134a in a very nice canister with a pressure gauge, and have absolutely no idea what to do next. A communications expert and licensed ham radio operator, he retired from the U.S. Navy in 2004 as a CWO3 after 24 years, worked in project management, and now runs Truck Camper Adventure full-time. Michigan Minnesota Do not remove the valve cap from the discharge side service valve or connect anything to it. I don`t think it wears out or naturally diminishes. Well I managed it in the end anyway but I'd still be interested in getting hold of a good guide on this subject. Unlike the Danfoss compressor refrigerator or the refrigerator found in your home, the ammonia absorption refrigerator neither uses a compressor, nor does it have any moving parts. By the way, its important never to tip the can upside down while youre charging. I have had him do repairs on my cold plate system. The gas I bought does have a gauge on it, and while I can probably find the pressure in the specs, do you know the range I should target? Holding plates will show a higher initial pressure, 10-15psi, and then drop to under 10psi. If the system is seriously undercharged, the refrigerant may exist in the system only as a vapour, so there will be no frosting on the evaporator, just a slight sweating and cold to the touch. This is usually achieved by backing off the handle on the top of the valve assembly, but check your specific instructions as some equipment may differ. Buy a refrigerator thermometer and place it inside your refrigerator. Quebec Then I connected one of the two valves on the charging kit to the refrigerant canister, making sure the other onethe manifold valvewas closed.

Well, in contrast with the ammonia absorption refrigerator which must be level in order for it to operate efficiently, the Danfoss compressor refrigerator can temporarily operate up to 30 degrees out of level without risk of damage. Newfoundland What are some additional pros of the Danfoss compressor refrigerator? Indiana If youre planning to buy a truck camper from the factory, one of the most important decisions youll have to make is which type of refrigerator to have installed in it. Refrigeration compressors are designed to compress gas only. With todays furlers, an read more, For years, Nautitech Catamarans has been doing things differently from other production cat builders, and it seems to be paying off. Pennsylvania For an evaporator system like this, the pressure will drop to 3 to 7psi as the box cools down. Sorry about that I have not actually used one of those fittings I have always used standard refrigeration gauges as I have them already. [QUOTE=RickB;118865]These are Schrader valve connections, right? Surely, if any doofus can top up a cars AC system, any doofus should be able to top up a marine fridge? More out of fear than knowing what I was doing, mind! Having gone through the failures of an absorption unit myself and having to throw food out was such a waste. After releasing some refrigerant, let the system settle down for approximately 15 minutes, then visually check the system. According to a Dometic representative, the disparity between the two figures is due to the other components in the refrigerator that require power to operate like the condenser fan and light. A marine refrigerator is wonderful thing as long as its working. Exactly how much amperage depends on several factors including the refrigerators temperature setting, the ambient temperature, the available voltage, how well the unit is insulated, and whether the refrigerator is working to get the temperature cold at start-up or working to maintain the operating temperature. Such extremes are rare though. Mello Mike is an Amazon.com associate. Unfortunately, its poorly [read more], As most RV owners know, RV absorption refrigerators can sometimes be very finicky. -------- A qualified person will need to possess arefrigerant handling certificate that costs 500 to obtain. Queensland

Saskatchewan 6 After a few minutes, the pressure dropped to 7psi and then down to 3, so I gave the system another 5-second charge. Those are the pros, now lets look at the cons. All that changed with the arrival of the Danfoss BD35F compressor. Missouri Truck Camper ($35,000), For Sale: 2007 Okanagan 117 DBL Truck Camper ($35,000), For Sale: Ford F250 Moto-Hauler Camper ($23,000), Why the Payload Rating is Important for Truck Campers, How to Properly Charge an RV Lithium Battery, A Question About Removing Truck Campers at RV Parks and Campgrounds, Big Power in a Small Camper Going Lithium Cheap, Enjoying 2 Meter Ham Radio on Your Truck Camper Adventures, Truck Bed Mod: SherpTek Food Prep Grill Table, SherpTek Transforms Slide-in Truck Camper Into More Capable Overlander, OEV Aluma Tray a Popular Truck Camper Option, New Tag Axle Improves Truck Camper Hauling Options, Keeping Things Warm: Insulation Upgrades For Truck Campers, StableCamper Installation Report and Review, Going Lithium: LiFePO4 Batteries For the Truck Camper Adventure Rig. The suction side service valve normally will be on a stub of tubing that is connected directly to the top of the compressor. During the construction of our camper, we had the choice of installing either a Dometic CR-1110 Danfoss compressor refrigerator or the standard Dometic three-way absorption refrigerator.

Im going to monitor it with a trimetric 2030 and then its solar time! Another benefit, of course, is that theres no pilot light. Once the box was fully cooled down, this would almost certainly drop to 7psi or thereabouts. The following is intended for the use of a boat operator with average mechanical skills. 7 Holding steady at 6psi, but I figured a bit more refrigerant would not hurt. The refrigerator compressor basically does two things: it raises the pressure of the refrigerant vapor used in the refrigerator and helps to maintain the vapors flow rate. The unit has a suction ("C" in diagram), process ("D") and discharge ("E") connector, and the canister I bought would allow me to connect it to anyone of these. These guidelines are intended for use by operators of R134a marine refrigeration systems in the UK prior to introduction of the new regulations, and laws covering the use of HFC refrigerants may vary in other parts of the world. Nothing illustrated this better than the 2021 Atlantic Rally for Cruisers (ARC), which departed Las Palmas de Gran Canaria (in Spains Canary Islands) in November and wrapped up in December on the island of St. Lucia read more, There is, of course, nothing new about bowspritssailing ships have been using them for centuries. He also does some RV consulting, repairs, and inspections on the side. Looking forward to the compressor in my new-to-me Laredo SC at the end of the month. Truck Camper Adventure is an emagazine offering truck camper news, reviews, travel tips, and more. In all cases it is the duty of the person performing the service to verify that he/she is not violating any laws or regulations by following these guidelines. A technical information resource for yacht owners. We cover all types of truck campers here at Truck Camper Adventure. Doing this can cut the refrigerators duty cycles and power consumption by half.

Danfoss was recently bought out by the German company, Secop, but Secop still maintains the Danfoss manufacturing operation in Denmark. Do you know what the process port is used for?

Too much or too little refrigerant will result in a system that will have some cooling effect, but will not be working to its full potential. Replace the valve cap firmly. 4 After opening the dispensing and manifold valves just long enough to purge air out of the hose with refrigerant, I turned off the manifold valve and connected the hose to the Schrader valve. These are available from the same sources. I have kept these very basic for emergency recharging but will also work on a more in depth document for those with all the correct tools. Ocean Voyages Institute, a non-profit organization based in Sausalito, CA, uses read more, The days of multihulls being the weirdos of the sea are gone. Among them are many remarkable people whove made contributions to the world of sailing through education, innovation and advocacy. Otherwise, its contents will emerge as a spray of freezing liquid. His cell phone number is 360-305-9573. They all use the Danfoss DC compressor, so generally speaking, they all offer the same performance and reliability. Getting kids comfortable on the read more, 2022 Active Interest Media All Rights Reserved. Oil-free R134a continues to be available outside UK, where these regulations have yet to be implemented. Personally, weve found that having a 340 watt solar power system and a 220 amp hour battery bank is more than large enough to run our compressor refrigerator and meet all of our other electrical needs. I sat down with a fridge specialist and learned how to charge the fridge but that was some time ago and my memory is rusty. Had there been an unidentified leak, the repair would have involved tracing and repairing it, then sucking air and moisture out of the system with a vacuum pump before recharging. This ensures the contents of the refrigerator get cold sooner. Basically, the ammonia absorption refrigerator uses heat to operate. You should see the frosted area on the evaporator increase after adding some refrigerant. The name Danfoss is a bit of a household word in the marine/RV industry which is why many still refer to this compressor as a Danfoss. If anyone is unsure please contact me via PM. Search below to locate Port Captains near your destination.

Thanks! Working with refrigerants involves potentially dangerous pressures and temperatures and precautions must be taken to avoid injury. You must log in or register to reply here. This is a huge plus for overlanders and boondocking enthusiasts as getting a perfectly level campsite can sometimes be difficult. What heck are the discharge and process connections for? Ohio Living in the sun drenched southwest, this was a fairly easy decision for usthe Danfoss compressor fridge was the only way to go.

R134a refrigerant canisters currently come with a 13 mm fitting, as used for car air conditioning systems. Rhode Island Its been known to paralyze cruisers for weeks on end, trapping them in exotic ports while they lay in wait for that rare, elusive creature known as a marine refrigeration technician. Definitely something Ill look into if the current fridge dies. Annoyingly Calder's guide doesn't really cover Danfoss and he refers to using both the high pressure and low pressure side of the gauge, yet I remember my fridge specialist using only the low pressure side. At this point, you may be wondering what this compressor does. He does nothing but marine refrigeration and comes to Anacortes one day a week. This is when the fridge temperature is close to the required temperature but the compressor is still running. Add the refrigerant in small amounts (say 5 seconds) and then let the system settle down for approximately 10 minutes. Per NSHOFs rules, nominees must be American citizens, 55 years of read more, In the following excerpt from Wild Seas to Greenland A Sailing Adventure with Ocean Racer Ross Field, veteran mariner Rebecca Hayter, recounts how Field prepared the aluminum-hulled Rosemary, which he bought in France, for a try at the Northwest Passage People often ask: why read more, The Coast Guard says that the best life jacket is one you will wear, so comfort and function are important considerations when picking out a life jacket that suits your needs. New regulations in UK (Seehttp://www.acrib.org.uk/MG7OLH18285)will make the recharging of marine refrigerators more difficult or impossible for the DIY owner. One common problem is poor performance on summer days when ambient temperatures are high (90 degrees and higher). Ontario If there is too little refrigerant in the system, it will have all evaporated back to a vapour long before it reaches the end of the evaporator. Well, weve just mentioned the biggestit consumes far less amperage than conventional RV refrigerators. If you are unsure about your ability to safely accomplish any of the following procedures or if you cannot positively identify the low and/or high-pressure service valves, consult a marine refrigeration specialist. 3 Following instructions, I ran the compressor for 15 minutes to warm it up, with the thermostat set to the lowest temperaturethis keeps the compressor running at a constant speed. Run the system for a while, then add a small amount of refrigerant. The literature that came with our Dometic CR-1110 lists a maximum current draw of 5.9 amps DC. This will do it but you need an adapter from the R134a car type connector to a 1/4 inch schraeder valve. Logic (not knowledge) tells me if you need to re-gas, your gas has gone somewhere(? That said, these days they are more popular than ever on cruising boats, thanks to advances in sails, sailhandling technology and boat design in general. This means you can run a compressor refrigerator while driving without having to worry about the pilot light blowing out. The refrigerator has worked perfectly since its recharge. Ive had an absorption the last 5 years. http://www.ryanairconspares.com/refco-m-10.html, http://cgi.ebay.co.uk/EZCHILL-AUTO-AIR-R-134A-REFRIGERANT-NEW-49-99_W0QQitemZ320636772767QQcmdZViewItem, http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=400028657105&ssPageName=STRK:MEWAX:IT#ht_4082wt_1139, http://coxengineering.co.uk/Documents/Recharging%20a%20simple%20R134a.pdf. Theres no doubt about it. As a rookie, what is a trimetric 2030? In this type of system, the temperature of the evaporator is directly related to the amount of refrigerant in the system. I think refrigeration guys sometimes use a dye to help find leaks. Idaho As it was I did as you say, adding a bit at a time in short bursts. This is where the liquid refrigerant is fed into the evaporator and where the frosting begins.

What this means is that your RV will require a minimum of two 12 volt batteries (about 200 amp hours) and a effective way to keep them charged, either a 200 watt solar power system or a generator. Victoria RV Refrigerators: How Level Should They Be? Tasmania New South Wales Wyoming Hi I will compile a quick guide to filling Danfoss refrigeration systems shortly as if you use this method it does not guarantee a completely full system. The adaptors are available from Ebay traders and from Kooltech. When the charge in the system is correct according to the conditions described in Section 1, remove the charging hose from the suction side service valve while the system is running. I suffered it myself for a short time last summer, after I accidentally discharged the refrigerant from the new fridge unit I had installed. Texas JavaScript is disabled. Moreover, the Danfoss compressor refrigerator takes only a couple of hours to reach its set operating temperature. We are conducting trials at present to establish this. The source of this heat comes from either a propane flame or from electricity (110 volt AC or 12 volt DC). Mello Mike is an Arizona native, author, and the founder of Truck Camper Adventure. This is usually achieved by screwing in the handle on the top of the valve assembly to pierce the can, but follow specific instructions supplied with your equipment. The suction side service valve is normally situated on a stub that is attached directly to the top of the compressor. South Australia It will describe what symptoms to look for in a correctly charged capillary refrigeration system, and how to adjust the charge if an undercharged or overcharged condition exists. It doesnt matter if its a slide-in or a chassis-mount, a hard-side or a pop-up, if its a truck camper and its carried on a truck, we cover it. No special tools are required, but the following items will need to be purchased from an auto parts or hardware store. New Hampshire Finally, I take it that I don't need to crack the discharge port, just pressurize the suction side a bit? Reading assorted treatises on marine refrigeration only elevated my angst. Screw the valve assembly on to the can of refrigerant, then screw the adapter on to the valve assembly. Thats hard to say. If there are two service valves, make sure that you attach the hose to the suction valve and not the discharge valve. On a seriously overcharged system it may take repeated releases before the symptoms of a slight overcharge appear. This is backed up by the very poor instructions that comes with my gauge kit. Unfortunately, the process of compressing gas and raising pressure requires a lot of energy. To avoid overcharging, its best to charge in short bursts and let the system settle down for a few minutes in between. -------- Maryland On a slightly overcharged system you should see the frost line on the tubing move back towards the evaporator or disappear completely. Gone are the days of having to turn on your absorption refrigerator the day before your trip to ensure its cold. These cycles can run as high as 100 percent at start-up in warm weather or 0 percent at night when the refrigerator door isnt being opened and when ambient temperatures are below freezing. It helped that I knew why my fridge needed a charge: soon after installing the Isotherm fridge unit I had undone one of the Danfoss BD35 compressors quick-fit couplings to make room for the galley sink drain hose, and heard a distinct hiss as the gas made good its escape. undesirably, into the atmosphere). The only recourse of the boat owner will then be to employa qualified person, at some cost. It only takes a few seconds. According to the Secop website, the maximum current draw of the Danfoss BD35F compressor is 4 amps. New Jersey New York All items needed for correcting the charge are readily available online or from a refrigeration supplier. To learn more about this program read here: Powered by vBulletin Version 3.8.8 Beta 4, R134a Refrigerant Pressure Temperature Calculator. Do not open the high-pressure service valve on your system, or connect anything to it.



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