Interested In Advertising? | Contact Us Here
Warning!

 

Welcome to Clean It Up; the UK`s largest cleaning forum with over 34,000 members

 

Please login or register to post and reply to topics.      

 

Forgot your password? Click here

Brownie10

  • Posts: 57
320ppm IN 38ppm OUT
« on: October 28, 2008, 04:33:58 pm »
Just fitted my merlin today (second hand). The reading before going in to the di vessel was 140ppm (from mains of 320ppm) but I let it run for about 10 mins and now its 38ppm. Is this good enough?

I ask because I dont want to start using my resin until i know thats the best (ish) I can get for a hard water like mine.

Any advice would be much appreciated.


AuRavelling79

  • Posts: 25397
Re: 320ppm IN 38ppm OUT
« Reply #1 on: October 28, 2008, 04:52:14 pm »
Seems high to me - my ro-man is 400 in and 10 out before the DI.

My DI (10") vessel starts at 000 and I run it until it reaches about 008 and then change the resin. This vessel goes thru a second one which I change at 003.

When my membranes get tired they creep up to about 20 and then I change them. Once a year for me.
It's a game of three halves!

MSTAV

  • Posts: 366
Re: 320ppm IN 38ppm OUT
« Reply #2 on: October 28, 2008, 05:03:29 pm »
my merlin is the same mate. dead on 38ppm before di, and 410ish ppm before ro. I asked the same question a while ago and it seems to be the norm with merlins.

Mike

Steve Weatherley

  • Posts: 699
Re: 320ppm IN 38ppm OUT
« Reply #3 on: October 28, 2008, 05:06:15 pm »
I have a merlin and am getting the same readings as you. My input from the tap is 380 ish

Brownie10

  • Posts: 57
Re: 320ppm IN 38ppm OUT
« Reply #4 on: October 28, 2008, 05:15:58 pm »
Thanks for the help everyone

Did you guys have a problem when it came to polishing it then. As in, you are going through a lot more resin?

Also how do you know when the membranes need replacing. Is it just a gradual creep up of your ppm before the di vessel.....

Brownie10

  • Posts: 57
Re: 320ppm IN 38ppm OUT
« Reply #5 on: October 28, 2008, 05:18:17 pm »
Is it even possible to get it to 000ppm in our case (hard water and merlins)?

MSTAV

  • Posts: 366
Re: 320ppm IN 38ppm OUT
« Reply #6 on: October 28, 2008, 05:19:32 pm »
i have had mine nearly a year now and havn't had to change a thing and i pure 400 litres per night.  change resin every 2-3 months so quite quick i guess. thats using 2 di vessels

mike

Brownie10

  • Posts: 57
Re: 320ppm IN 38ppm OUT
« Reply #7 on: October 28, 2008, 05:22:27 pm »
I should be okay then :)

Out of interest why is it that you have two vessels?

dmlservices

  • Posts: 981
Re: 320ppm IN 38ppm OUT
« Reply #8 on: October 28, 2008, 05:30:55 pm »
hi brownie
should have gone for a ro man with your tds mate, mine is around 320-350 in , 004 out , looked at the merlin but was advised not to go with it, produces water quick , but apalling waste to product, and does not bring tds down enough- costing a lot more in resin changes. after going through di, mine comes out at 000, and resin lasts ages.


daz

Brownie10

  • Posts: 57
Re: 320ppm IN 38ppm OUT
« Reply #9 on: October 28, 2008, 05:36:37 pm »
What model did you get, and how much was it?

Got work but not in a hurry, so could still sell it and change systems if its worth it...

[GQC] Tim

  • Posts: 4536
Re: 320ppm IN 38ppm OUT
« Reply #10 on: October 28, 2008, 05:44:46 pm »
Sounds about right, I've always been told that Merlins are great for producing water quickly, but are not as effective in removing impurities, hence the higher TDS.

dmlservices

  • Posts: 981
Re: 320ppm IN 38ppm OUT
« Reply #11 on: October 28, 2008, 05:46:17 pm »
hi
i went for a 200 gpd unit , it feeds into a 1000 ltr ibc, my van tank is 500 ltrs,and i never run out of water, ro man sell them , depending on your water usage you can get same or go bigger.
www.ro-man.com .

daz

Frank pole

  • Posts: 143
Re: 320ppm IN 38ppm OUT
« Reply #12 on: October 28, 2008, 05:55:29 pm »
I was getting 426 in & 39 out from my merlin setup so I sold it on ebay! I bought ro-man kit and the last time I checked I was 423 in & 9 out.