how to winterize air conditioner units on 2014 Beneteau Oceanis

[mugsey]

We have a 38 ft, new to us this year. After we thought it was winterized, he was reading book, and realized he's not sure we got anti freeze thru air conditioners. Is there a place to go to get a more thorough instruction manual than the one we got with boat.  Thanks for any help

[Btbogdan46]

There are two thoughts about winterizing air-conditioner units. One says to run Anti freeze through the system. I would suggest the non-toxic water system antifreeze and the is what the manual says, "WINTERIZATION

There are several methods of winterization, some of which work better than others. Any method that causes the antifreeze

solution to flow downward is the method of choice. By this means, the antifreeze solution displaces any trapped water and

eliminates the possibility of it freezing in hidden areas.

Choose the method that works best for you. In the following four methods, the first two use a 50/50 nonpolluting biodegradable

antifreeze/water solution:

• Pump antifreeze solution into the overboard thru-hull fitting, and discharge through the intake thru-hull fitting.

• Use the seawater pump to pump antifreeze solution through the system and discharge through the overboard thru-hull

fitting: Close seacock, remove hose from strainer discharge, raise hose above pump (so pump does not lose its prime)

and pour in antifreeze solution. Pump solution through system. The strainer and hose to seacock need to be drained of

water.

• Use pressurized air injected at the overboard discharge fitting to force system water through the seawater intake fitting,

thus expelling any trapped water from the system.

• Use pressurized air injected at the seawater intake fitting to force system water through the seawater overboard

discharge fitting, thus expelling any trapped water from the system. In addition, since the seawater pump utilizes a magnetically driven impeller, remove the impeller from the wet-end assembly,

wipe with an alcohol solution, and store in a warm, dry area until commissioning takes place.

[iamdave]

How big of a pump do you need to push the Antifreeze through the outlet.

[Btbogdan46]

There are several ways to winterize a Dometic airconditioner. Here are their directions. I have also attached the manual for my units that may be in your boat.

WINTERIZATION

There are several methods of winterization, some of which work better than others. Any method that causes the antifreeze

solution to flow downward is the method of choice. By this means, the antifreeze solution displaces any trapped water and

eliminates the possibility of it freezing in hidden areas.

Choose the method that works best for you. In the following four methods, the first two use a 50/50 nonpolluting biodegradable

antifreeze/water solution:

• Pump antifreeze solution into the overboard thru-hull fitting, and discharge through the intake thru-hull fitting.

• Use the seawater pump to pump antifreeze solution through the system and discharge through the overboard thru-hull

fitting: Close seacock, remove hose from strainer discharge, raise hose above pump (so pump does not lose its prime)

and pour in antifreeze solution. Pump solution through system. The strainer and hose to seacock need to be drained of

water.

• Use pressurized air injected at the overboard discharge fitting to force system water through the seawater intake fitting,

thus expelling any trapped water from the system.

• Use pressurized air injected at the seawater intake fitting to force system water through the seawater overboard

discharge fitting, thus expelling any trapped water from the system.

In addition, since the seawater pump utilizes a magnetically driven impeller, remove the impeller from the wet-end assembly,

wipe with an alcohol solution, and store in a warm, dry area until commissioning takes place.

NOTE

Collect all discharged liquids and recycle or dispose of in a proper manner in accordance with federal, state and/or

local regulations.

On Sunday, October 22, 2017 at 1:14:33 PM UTC-4, mugsey wrote:

[Greg A]

Use the seawater pump for the AC system; it is the right size.  Just close the seacock, disconnect the hose, drop the loose end of the hose into a bucket of pink RV style antifreeze, and fire up the AC until you see pink antifreeze discharging overboard.  Don't forget to open the seacock with the hose re-attached next spring.

Greg