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Raritan Pursan EX Installation

  • Thread starter Thread starter Jammin'
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Jammin'

Jammin'

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Joined
Jan 3, 2018
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479
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  1. OWNER - I own a Hatteras Yacht
Hatteras Model
43' DOUBLE CABIN (1970 - 1984)
Raritan says not to install where ambient temperatures get over 120*. That rules out the engine compartment in my 43DC and makes it very challenging to find a place for the unit. It seems that the issue is the life of the unit itself and not the effectiveness of the treatment. Jumping through hoops to mount it in the closet in the aft cabin behind the electrical panel down low.

Can anyone shed light on the temperature issue?
 
Are you sure your ER gets to 120? That’s really hot and less than ideal for a number of components. Some boats have alarms set at 120. Adequate ventilation (large blowers getting air in) are a solution
 
On my last boat I installed a Purasan in the engine room and never had a problem. But the system I installed was Raritan's hold n treat controls, so I could control when the Purasan was activated. In this set up, my toilets all flushed into the holding tank. On demand, the hold n treat system activated a macerator pump that pumped from the holding tank to the Purasan, and so displaced treated effluent overboard. I usually activated it manually (rather than use the optional automated float sensor) and did so at anchor after the engine room had cooled off a bit. I highly recommend this set up. I've never been a fan of automatic activation, out of consideration for swimmers nearby.

And, yes. I'm sure you're correct that the temperature issue has to do with overheating the mini-macerators on the Purasan treatment unit.
 
If you need some technical information try calling Raz Marine, they are always a huge help with anything Raritan related.
 
Pascal said:
Are you sure your ER gets to 120? That’s really hot and less than ideal for a number of components. Some boats have alarms set at 120. Adequate ventilation (large blowers getting air in) are a solution
Click to expand...
With fans I've measured 135 F at forward ER bulkhead in Aslan--but it's dry heat.
 
Are you guys sure that Purasan systems are legal where you are or do you only discharge when out at sea. I know they are not legal in California, but then what is in Ca.
 
racclarkson@gmail.com said:
With fans I've measured 135 F at forward ER bulkhead in Aslan--but it's dry heat.
Click to expand...

What kind of fans? The small DC blowers don’t move enough air... nowadays builders install 120 or 240 v fans that blow air IN the ER. That’s what I m planning on doing on my boat
 
I have 2 purasan ex on my 52 in the engine room since more than 2 year without any problems.
 
We've had a Purasan unit in the engine room for at least 8 years. I replaced the motor shaft seals last year but i'm not sure if that was temp or age related.
 
polpaul said:
On my last boat I installed a Purasan in the engine room and never had a problem. But the system I installed was Raritan's hold n treat controls, so I could control when the Purasan was activated. In this set up, my toilets all flushed into the holding tank. On demand, the hold n treat system activated a macerator pump that pumped from the holding tank to the Purasan, and so displaced treated effluent overboard. I usually activated it manually (rather than use the optional automated float sensor) and did so at anchor after the engine room had cooled off a bit. I highly recommend this set up. I've never been a fan of automatic activation, out of consideration for swimmers nearby.

And, yes. I'm sure you're correct that the temperature issue has to do with overheating the mini-macerators on the Purasan treatment unit.
Click to expand...

This is exactly the setup I wish I had. I have asked several Raritan installers about it and they advised against it because they said the system was not set up for this capacity (I have 155 gallons in 2 waste tanks). Would you mind either posting more details about how yours is set up, your experience with the install and day to day use? Thanks!
 
Those installers are incorrect. The setup worked very well for me. If you PM me, I can see if I can scare up the old order specs. But in general terms I ordered the Hold 'n Treat controls, the Purasan unit itself, and a macerator pump. The install instructions, plus one or two emails to Raritan's excellent tech support made doing it myself quite easy. I installed it in about one day.

As for day to day usage, as I said the toilets would flush into the holding tank and once the level monitor showed about 1/4 tank I would manually activate the Purasan. My tank monitor was not connected to the Purasan so I had to hit the manual activate button each time I wanted to send another batch of waste to be treated, but a few day's worth of waste was treated in about four or five hits of the button. And each treatment cycle lasts about four minutes. Not a big deal. If you connect your level monitor to the Hold 'n Treat controls, you can set it to automatic, but I'm a freak about malfunctions and leaks and such. Personal preference.




nautibake said:
This is exactly the setup I wish I had. I have asked several Raritan installers about it and they advised against it because they said the system was not set up for this capacity (I have 155 gallons in 2 waste tanks). Would you mind either posting more details about how yours is set up, your experience with the install and day to day use? Thanks!
Click to expand...
 
The 12v blowers are not effective, I agree. I installed a 120vac squirrel-cage blower in my engine room, which moves air out of the engine room. It is on a one-hour timer which I set after shutting the boat down. Not noisy and pretty effective.

I have never measured the engine room temp while running the boat but I'm sure after getting the engines fully warmed up it's pretty hot in there. Also, bigger boats with DD engines tend to keep the heat in the ERs longer, as the weight of hot iron in there is much more.

Hatteras did address these problems in some of the larger boats, back in the day. (whether they still do, I don't know) I remember reading a brochure for the early 72MY, the first big boat they built, and as I recall it had a lot of engine room ventilation as standard fitment- and that boat "only" had 12V-71s at what would be a modest power rating by today's standards.
 
polpaul said:
Those installers are incorrect. The setup worked very well for me. If you PM me, I can see if I can scare up the old order specs. But in general terms I ordered the Hold 'n Treat controls, the Purasan unit itself, and a macerator pump. The install instructions, plus one or two emails to Raritan's excellent tech support made doing it myself quite easy. I installed it in about one day.

As for day to day usage, as I said the toilets would flush into the holding tank and once the level monitor showed about 1/4 tank I would manually activate the Purasan. My tank monitor was not connected to the Purasan so I had to hit the manual activate button each time I wanted to send another batch of waste to be treated, but a few day's worth of waste was treated in about four or five hits of the button. And each treatment cycle lasts about four minutes. Not a big deal. If you connect your level monitor to the Hold 'n Treat controls, you can set it to automatic, but I'm a freak about malfunctions and leaks and such. Personal preference.
Click to expand...

Thanks! I appreciate it. Sending PM now...
 
rfontanet said:
I have 2 purasan ex on my 52 in the engine room since more than 2 year without any problems.
Click to expand...

What heads do you have your Purasan paired with?
 
Pascal you do not want to blow air into a hot engine room to control the problem, you need to pull the air out and allow for intake air to replace the displaced exhaust. I talked with Delta T Systems and they made recommendations for my boat based on the engine room size, and the size and requirements of air intake for my main engines. It is amazing how much cold air is required to run my 12v71ti's and maintain the correct operating temperature in the engine rooms. Delta T has continuous duty blowers and all the equipment to set up things in the correct way. The number 1 thing that will increase wear and early failure rates on marine diesels is excess heat so proper ventilation system is a bargain.
 
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