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Installing Marine Air VTD12K-410A

Post
Member

GeorgeH

posts 47

2:39 pm January 7, 2012

Hello again Steve,

I have received the Marine Air VTD12K-410A that I recently purchased from you.  It looks great.

And I have now removed my old Marine Air CM16H.

A question about the mounting brackets:  My old unit was secured to a fixed base that is made up of 1/2 inch plywood with a fiberglass on top.  It was attached by four 3/8 inch threaded studs that had been secured into the plywood with epoxy or 3200, which then had nuts on top.  Of course those studs are useless now as they don't match the footprint of the new unit.  Given that I cannot access the underside of the plywood base, what is the best way to secure the new unit?  Lag screws?  Threaded stud as in prior installation?  Something else?

Thanks, George

Admin

Steve Pooler

posts 1127

6:06 pm January 7, 2012

Hi George~

Yes SS Lag Screws are fine, Or some #14 SS Pan Head Screws…

You e-mail question…You should be able to use the blower adapter from your old unit…

It may be pop riveted on the old unit but a 1/8" drill bit with run thru those quickly…

Then use some sheet metal screws to re attach…You don't have to use the holes in the blower but of course can it you want.

Or I can have a new adapter sent to you…They don't come with because some builders fabricate their own box that may have more than one outlet…

 

Steve~ 

Member

GeorgeH

posts 47

7:32 pm January 7, 2012

Thanks Steve,

Will use lag screws or pan head as you say.

As you may recall, I never had a blower adapter on my old unit, as the setup went from the square blower to a custom fiberglass right angle box.  Downstream from that I have an old adapter for 6 inch duct but unfortunately it does not cover the air spaces around the square blower vent on the new Turbo.  So yes, please send a new adapter for 6 inch duct.  

- George

Member

GeorgeH

posts 47

7:39 pm January 7, 2012

Steve,

Would that adapter I need be the HA6P?  And if so will it cover the air spaces around the edge of the square blower outlet?  Price?

Thanks, George

Admin

Steve Pooler

posts 1127

7:56 am January 8, 2012

Post edited 10:26 am – January 8, 2012 by Steve Pooler


Morning George~

 

I'll have one sent to you tomorrow (Monday)…My nickle…Sorry it must have slipped my mind…I did know about your box  Embarassed

 

Steve~

Member

GeorgeH

posts 47

5:33 pm January 8, 2012

Hi Steve,

I have the unit in place, and have modified the cavity it sits in to allow for 6" ducting for the first five feet or so.  Also dealing with plumping, wiring etc.

A couple of concerns:  The 655 air divider I purchased from you will just not fit in the tight space where it has to live.  So it looks like I will need to have an air divider made up out of sheet metal — sort of similar to the existing one I have.  [I tried to post a photo of it but was unable, so will send photo to your email].  Also, after getting my existing system apart I see that what I have is really two 4" legs, not two 5" legs as I had thought al along.  Modifying these 4" legs to 5" legs will be a major undertaking, because of the locations of the bulkheads the ducting must pass though — I'm not sure it can be done.  So I guess my question is:  Can I go from the 6" ducting – five feet or so — and then split to two 4" ducts?

Thanks, George

Admin

Steve Pooler

posts 1127

8:07 am January 9, 2012

Post edited 10:03 am – January 9, 2012 by Steve Pooler


Here is your Splitter picture George…click on it to enlarge

HY655

 

To me it doesn't look any larger than the one next to it…In one of your previous photos you showed where the old one was installed with the large end sticking thru a bulkhead….

Instead of doing that with the new one…Why can't you instead bring the 6" duct thru that hole & into the cabinet about a foot or so, bend it (the duct) 90 degrees & mount the new splitter higher in that cabinet where you may have more space out to the hull ?

Answer to your second question…No you Cannot use two 4" ducts on a 12K….Two 4" ducts do not equal one 6" duct…

There has to be a way to run two 5's…Be Creative or get a second opinion…Sometimes another set of eyes helps.

Since we have been talking beginning back in June…I have been very clear on the ducting requirements of each unit we have considered…Two 4" ducts would only be good for 8K & that size unit may not do the job you want…

Is there a way to maybe run 3 outlets…Add one more ?

Oh and here is your second picture:

 

 

Steve~

Member

GeorgeH

posts 47

9:37 am January 9, 2012

Thanks Steve,

Quite right, you have been clear about size of ducting needed — just thought I would give it one more tryEmbarassed

Good idea to bring the flex ducting into the cabinet before attaching the 655 splitter — I think that might work, just.

As for the idea of adding an aditional outlet…. interesting, yes, there is a need for an air outlet in the aft head, and that may be easier than modifying the existing two, 4" ducts to 5".  So am I correct in understanding that if I added an additional 4" leg [for a total of three, 4" legs] that would make the Turbo 12K happy?  If so, I am wondering how and where I could divide the 6" duct into three 4" legs.  I don't see that type of splitter in the MSI catalog.  Or would it require two splitters? 

–George

Admin

Steve Pooler

posts 1127

10:12 am January 9, 2012

It would require another splitter George~

Or you could do what Brian did on this page in another forum I visit…Last post on the page: http://flybridge.proboards.com…..8;page=106 

 

Steve~

Admin

Steve Pooler

posts 1127

10:13 am January 9, 2012

Let me know your thoughts ASAP…I'm about to place your order for the blower adapter & could ship something else with it.

 

Steve~


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