Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Andy@w.c.s on June 02, 2010, 06:33:53 pm

Title: merlin owners do I need ?
Post by: Andy@w.c.s on June 02, 2010, 06:33:53 pm

Hi guys
I have set up my mate merlin today and have had it on flush for the two hours as in the instructions

it has a psi of 31 going in from the mains tap this then drops to 28 when anyone in the block of houses uses any water ?

it is currently making 1 ltr of pure @7ppm every 38 seconds
Tds in is 74 /75

would you expect this to be better ?
and would a booster pump help to bring down the pure further ?

the waste is only running @ 77 /78

any thoughts

Andy

Title: Re: merlin owners do I need ?
Post by: tomy jackson on June 02, 2010, 06:49:53 pm

buster pump 30 psi no good

Title: Re: merlin owners do I need ?
Post by: formb on June 02, 2010, 07:05:52 pm

You need 50 psi at least.

Also I would get a 10" pre filter set. These are only £2 to replace and will make your membranes last longer while also reducing your tds to nearer 0.

www.gapswater.co.uk

Title: Re: merlin owners do I need ?
Post by: Andy@w.c.s on June 02, 2010, 07:40:54 pm

thanks chaps

i thought as much but just needed to be told

Andy
 ;D

Title: Re: merlin owners do I need ?
Post by: The Jester of Wibbly on June 02, 2010, 07:45:48 pm

The merlin will reduce your tds by 90% so seems calculations are spot on.

I think the only way to bring it down to 0tds is to polish it off with DI resin after merlin setup.  Resin will last ages with a tds of just 7 going in.

Just remember to run the merlin for about 10 mins each time you fill as it takes time for the TDS to settle.

Title: Re: merlin owners do I need ?
Post by: Andy@w.c.s on June 02, 2010, 08:08:15 pm

thanks paul

Title: Re: merlin owners do I need ?
Post by: Paul Coleman on June 03, 2010, 12:27:32 am

I run a merlin at around 40PSI.  TDS out was around 006 when the membranes were new (200ish at tap).  I think those results are pretty decent considering the low pressure.  I prefer to rely on mains pressure and a ballc0ck in the tank myself as I've been let down by electrical cut off in the past.

Title: Re: merlin owners do I need ?
Post by: prestige cleaners on June 03, 2010, 12:45:12 am

ive never had to back flush mine in 2 1/2 yrs? last owner said it doesnt need it?

tds is always 0-1 coming out though so im not worrying