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Catalina/Capri 25/250 Sailor's Forums

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Nicro Solar Vent Noise

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Voyager
Master Marine Consultant

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USA
5231 Posts

Response Posted - 02/05/2010 : 20:10:59

Glen
So long as you have the resistor in line, you won't overwhelm the motor or battery. Never connect a straight 12V lead to the vent. You would get sparks and a lot of smoke.

One thing you might want to check with an ammeter is the current draw from the single, built-in battery.

Here's why: I made an assumption about the fan drawing 100 mA. In fact, it might draw 200, 300 or 500 mA.

If, for example, it drew 500mA, the calculations would be very different.

You'd need a 22 Ohm resistor that dissipates 5W, or you could use five 100 Ohm 1W resistors in parallel.

To accurately do the math, use the measured current draw.

The bottom line: it's possible to supplement the solar charger using the house battery, and the good news is you won't need an A/B switch.

Edited by - on

jbkayaker
Captain

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USA
299 Posts

Response Posted - 02/07/2010 : 10:07:33

Check this website for information on repairing your Nicro vent inexpensively.
http://www.sailnet.com/forums/gear-maintenance/47138-nicro-day-night-2000-solar-vent-repair.html

P.S. from another Sailnet post:
I too am one of many owners of older day/night vents like this and mine went TU about a year ago. Being too frugal to go right out and buy a new one I hesitated. Based on this thread I rebuilt mine too. The only difference is I used a piece of a 1 1/4 inch OD plastic sink drain pipe to fit the new motor. Just cut off a section about 1 1/4 inches long, split it along one side and stretch it to slid over the new motor. It then will slip in perfectly into the hole made where you cut off the old motor!

Edited by - jbkayaker on 02/07/2010 10:17:33

Alan Clark
Captain

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406 Posts

Response Posted - 02/08/2010 : 14:18:59

Glen, Batteries Plus is a store like Radio Shack, I have not tried to find them on the internet and I would give them the information on the battery.

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glen
Captain

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359 Posts

Response Posted - 02/09/2010 : 07:07:09

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Alan Clark
 Glen, Batteries Plus is a store like Radio Shack, I have not tried to find them on the internet and I would give them the information on the battery.
<hr height="1" noshade id="quote"></blockquote id="quote">Thank you Alan

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glen
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359 Posts

Response Posted - 02/09/2010 : 07:09:20

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Voyager
 Glen
So long as you have the resistor in line, you won't overwhelm the motor or battery. Never connect a straight 12V lead to the vent. You would get sparks and a lot of smoke.

One thing you might want to check with an ammeter is the current draw from the single, built-in battery.

Here's why: I made an assumption about the fan drawing 100 mA. In fact, it might draw 200, 300 or 500 mA.

If, for example, it drew 500mA, the calculations would be very different.

You'd need a 22 Ohm resistor that dissipates 5W, or you could use five 100 Ohm 1W resistors in parallel.

To accurately do the math, use the measured current draw.

The bottom line: it's possible to supplement the solar charger using the house battery, and the good news is you won't need an A/B switch.
<hr height="1" noshade id="quote"></blockquote id="quote">Thank you Bruce

Edited by - on

OLarryR
Master Marine Consultant

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USA
3367 Posts

Response Posted - 02/09/2010 : 22:14:11

Jim,

Thanks for the info regarding rebuilding the vent. I am not sure I want to tear into the guts of it. After the snows pass in our area and I eventually remove my copver, I will check out the vent again. It was quieter after I put the Sailkote on. I also remembered that when I bought the vent ~ 4 yrs ago, there awas another fan blade in the box - for pulling air in vs out. I amy put on the other fan blade and see if that has any effect as well.

Edited by - on

jbkayaker
Captain

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USA
299 Posts

Response Posted - 02/10/2010 : 09:56:53

My Nicro vent is held together by several small Phillips head screws. It was easy to take apart. But be wary of very sharp edges on the steel part.

Edited by - jbkayaker on 02/10/2010 10:17:36

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.