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Winterising 495 |
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David 495 
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Joined: 10 August 2010 Location: Norway Status: Offline Points: 28 |
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 Topic: Winterising 495Posted: 28 November 2011 at 13:57 |
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Any tips on Winterising (we get -20'C regularly) ? Frost: Raw water cooling system/ aft shower/ how to empty tanks fully/ using the new 'drinkable' anti-freezes in the hot & cold pipework & pumps .......
Batteries: charge & forget, or leave on trickle charging ?
Condensation: Background heaters/ run a permamnent dehumidifier or leave the interior to freeze down ?
Any experiences/tips welcome !
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David 495.
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kweetje
Commadore 
Joined: 15 September 2009 Location: Belgium Status: Offline Points: 360 |
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Posted: 29 November 2011 at 22:31 |
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Hi David,
last year i left the interior freeze down without problems, but !!!!! - empty the water tank - empty black water tanks - you should open all water tap points - unscrew the external shower and empty the hose (keep shower piece in a locker) furthermore our ship was out of the water for the winter and they proposed me a winter preparation for the motor which i accepted, but... i don't know what they did for the money. |
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First 4000 miles, no substantial problems
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kweetje
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Joined: 15 September 2009 Location: Belgium Status: Offline Points: 360 |
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Posted: 29 November 2011 at 22:34 |
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oh and one more thing: fill up your diesel tank to avoid condensation in the tank.
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First 4000 miles, no substantial problems
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CharlesP
Admiral 
Joined: 23 September 2010 Location: United Kingdom Status: Offline Points: 1208 |
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Posted: 29 November 2011 at 23:34 |
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Have a look at a current topic in Chit Chat for some tips on winterising the water system.
A warm temperature is good for batteries which should also be charged each month. A dehumidifier is excellent if you can run it at least for a day every few weeks, but check the specification as a minimum temperature is required. Charles |
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'MERIDIAN LADY'
320 Nr 536 2010 Medway |
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kweetje
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Joined: 15 September 2009 Location: Belgium Status: Offline Points: 360 |
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Posted: 30 November 2011 at 20:30 |
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Hi Charles,
could you explain min. temp. ? with regard to dheumidifier or with regard to the ship ? |
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First 4000 miles, no substantial problems
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CharlesP
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Joined: 23 September 2010 Location: United Kingdom Status: Offline Points: 1208 |
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Posted: 30 November 2011 at 21:18 |
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The specification for the dehumidifier should state the minimum room temperature for it to operate, which is the temperature inside the boat in your case. So for the dehumidifier to work you may have to also put a heater on.
One boat chandler in uk last year was selling a dehumidifier which actually required a room temperature of 15 deg C, so clearly this was not suitable for boat use in our English winter. Other more expensive dehumidifiers required a room temperature of 5 deg C. In the specification, room temperature is often referred to as 'operating temperature'. Charles |
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'MERIDIAN LADY'
320 Nr 536 2010 Medway |
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kweetje
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Joined: 15 September 2009 Location: Belgium Status: Offline Points: 360 |
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Posted: 01 December 2011 at 16:16 |
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Charles,
Thxs for explanation ! Mine is 5°C, but the heating stays on minimum. Another aspect is that some of our heaters, when no need for heating, will continue to blow (cold) air since the ventilation blower of the heater will reamain in function. A colleague in our harbour told me this, but i can't believe this info. Have you got any information on this subject ? |
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First 4000 miles, no substantial problems
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CharlesP
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Joined: 23 September 2010 Location: United Kingdom Status: Offline Points: 1208 |
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Posted: 01 December 2011 at 17:06 |
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I believe your colleague is correct. I had a fan heater which worked in this way 20 years ago. It had a dial which was turned to choose the temperature setting so when room temperature was high, a thermostat inside the heater turned the heating element off, but the fan kept going.
However, most thermostat controlled heaters switch off and on completely, so you may have to search around. You will also need to check the wattage to ensure your electric supply is adequate. Charles |
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'MERIDIAN LADY'
320 Nr 536 2010 Medway |
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panos
Admiral
Joined: 02 March 2008 Status: Offline Points: 1939 |
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Posted: 01 December 2011 at 18:39 |
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Hi,
IMHO at 5 C the water vapor content per cub.meter of air is so low (1 gr/m3) that a passive chemical air dehumidifier would be very successful and work without electricity. The humidity problem is in hot climates, where the vapor content of air is 25-30 gr/m3 and the dehumidifier will straggle to keep the boat dry. |
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Panos
Hanse 630e - selling her - |
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CharlesP
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Joined: 23 September 2010 Location: United Kingdom Status: Offline Points: 1208 |
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Posted: 01 December 2011 at 19:48 |
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It's good to read your science Panos. It confirms my unscientific thoughts.
I am using passive chemical crystals for the first time this year so I will be able to report on them next year. Didn't use anything last year and found condensation most visits. Charles |
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'MERIDIAN LADY'
320 Nr 536 2010 Medway |
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