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Winterizing A/C
- tonyiiiafl
- CYO Supporter
- Posts: 887
- Joined: November 19th, 2015, 4:00 am
- Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
- Location: Cape Cod, MA
- Has thanked: 589 times
- Been thanked: 175 times
Winterizing A/C
- Midnightsun
- CYO Supporter
- Posts: 2850
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1099 times
Re: Winterizing A/C
This is what I cobbled together which works wonderfully and is now part of my Winterizing Kit. viewtopic.php?f=13&t=4486&p=32968&hilit=pink+pump#p32968
A 3 way valve would not work on mine as I have 3 AC units. The pump feeds a manifold that supplies each unit. Problem with a multi valve is it selects only one outlet and therefor cannot supply to all which is required for normal AC use.
- tonyiiiafl
- CYO Supporter
- Posts: 887
- Joined: November 19th, 2015, 4:00 am
- Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
- Location: Cape Cod, MA
- Has thanked: 589 times
- Been thanked: 175 times
Re: Winterizing A/C
- Midnightsun
- CYO Supporter
- Posts: 2850
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1099 times
Re: Winterizing A/C
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
- Has thanked: 85 times
- Been thanked: 86 times
Re: Winterizing A/C
Pink is poured into the strainer. Outside the boat your mate uses a Wetvac at each of the thru hulls pulling the antifreeze through the system. Once they see pink you're done.
In the spring, I 'prime' the system using a wetvac at the dock only this time pulling raw water. I only have to do this at one of the thru hulls and voila, its primed!
- Tireless
- Commander
- Posts: 460
- Joined: October 16th, 2018, 4:51 pm
- Vessel Info: 2006 Carver 44 CMY
Volvo Penta D6 370 HP - Location: Port Severn, Ontario
- Has thanked: 183 times
- Been thanked: 185 times
Re: Winterizing A/C
1) Close the through hull fitting and ensure the strainer cap is still on. You need a closed system.
2) Using a compresser, blow compressed air through the forward through hull exhaust fitting. This should remove all the water and push it out the other through hull fittings, normally there are one or two near the aft depending on how many A/C units you have. Push compressed air through until there is no more water coming out.
3) Open the strainer cap and vacuum the water out of the strainer.
4) If on the hard, open and close the sea cox to remove the water. If you are still in the water, do this after you are on the hard to ensure there is no water near your ball valve.
5) Fill a 5 gallon pail with pink and put a small submersible pump (1/6 HP) in the pail. Using a hose attached to the top of the submersible, pump the pink through the same forward though hull exhaust fitting until the pink flows consistently out of the other through hull exhaust fittings.
6) I then blow the system out again with compressed air to get rid of the pink. I have been told you don't have to do this, but I do it anyway.
7) Remove the strainer cap to check for pink and open the ball valve after you are finished and on the hard.
I have made special attachments with shut offs and ends to push the air/non-tox through the hull fitting. These are a pressure fitting at the hull that I hold on as I have yet to find some that actually attaches to the fitting. I simply used a barbed fitting with a little electrical tape on the contact point to help make a seal on the fitting.
This system has worked for me and my friends over the last four years with no issue. I have also seen mechanics do it this way. I prefer to do it on the hard this way as I have better access and you don't need shore power, just 15 amp plug.
There are many ways to winterize A/C, all good, but this is my preferred way and I thought I would share with you. It may work for you.
Greg
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