12 Meter AirConditioning

[Game Over]

I Recently purchased a 1990 12 Meter Convertible which has been rewired and converted for 240volt power.The A/C was left as is and basically de commissioned.I was looking to get it running again although cannot understand how these were set up to run.It appears that the Water pump would require the generator to supply 240/110volt along with the starboard engine to supply the refrigeration side of things.Can't imagine the other boaters camping nearby to appreciate this let alone the waste of fuel etc.Could anybody let me know what the set up should be or an alternative.I have absolutely no info/manuals for vessel.
Thanks
Nigel

[gardnersf]

The Air conditioner should be a totally electrical system unless it is substantially different from the 10 meters and other marine ari conditioning. The engines shoudl not need to run at all for AC.

I believe you can get a step down transformer to convert the feed to 110

[ready123]

Or take 110V from one leg of the supply.... get an electrician involved, it is easy to fix.

[Game Over]

Thanks for your help, the A/C Compressor is mounted to the starboard motor (basically a car A/C setup with electric clutch etc) and there are 3 x Evap air handling units under the starboard side seating in saloon.There are Denso brand controls located just above switchpanel at base of stairs to Galley.There is also an A/C switchboard with 2 x Contactors (1 for Evap fans & 1 for water pump)and other relays etc located in bunkroom closet area.It appears to be original design....thats what is confusing me. As i'm in Australia, the 240v suits me fine.Just need to work out a better A/C setup me thinks!!

[alexander38]

please send some pics of your setup, sounds like nothing we've seen.

[prowlersfish]

Many boats use 240 volts the A/c could be a 240 volt system or could be 120 volt running off one leg of the system . you a/c should be labeled to the voltage . a good electrician should be able to fix it . Its really easy to do if you have a basic under standing of 120 volt/240 volt systems , you you don't do not take chances ( it could kill you ) and hire someone .


Your in Australia I asume 120 volt and 240 are the normal voltage ?

if so is the 120 volts at 60 hz (cycles ) or is 50 hz ?

UPDATE

After checking I find Australia operates at 240 volts and 50 Hertz you will need a transformer ( don't belive 240 volts is in 2 legs in Australia) if you have 120 unit , you may have some isues with 50 cycles but I belive it will work

check the unit and find a good electrician

[ready123]

The more I think about this setup as described it sounds like an auto a/c unit hooked up to the engine for when one is running.
As the desire seems to be to have AC while at anchor I would go the route of getting a marine heat pump unit to run off the generator. You do have a generator aboard?

[Game Over]

Yes there is a Onan 8kva genset onboard. i was thinking along the same lines with ripping it all out and installing a remote water or air cooled condenser/compressor , what does this boat usually have as A/C if it was ever a standard.

[Sea Play'n]

Yes there is a Onan 8kva genset onboard. i was thinking along the same lines with ripping it all out and installing a remote water or air cooled condenser/compressor , what does this boat usually have as A/C if it was ever a standard.

Hi Aussie,
I have a 1985 11M and it came with 2 reverse cycle water cooled units. One is for the dinette and forward cabin and the second for the salon. They are both 120V and can be powered by the genset or shore power. I would be happy to send any info and diagrams from the manual to you if you answer to my email.
I wish I had my boat in Mooloolaba last year while visiting there!
Hugh hrmullen@shaw.ca