PDA

View Full Version : FMM Fluid sensor doubts


marinereef01
04/21/2017, 01:23 PM
So, I recently installed the FMM and 1" FMM sensor on my REEFER 450. The return pump is a Ecotech Vectra M1. When I have it maxed out at 100%, APEX is telling me the flow is only 487 GPH. Here's the plumbing setup (yes the flow arrow is going in the right direction).

http://i1308.photobucket.com/albums/s616/marinereef/20170421_111144_zpseijot1fl.jpg

Flow being displayed with the pump maxed at 100%

http://i1308.photobucket.com/albums/s616/marinereef/FMM%20Return_zps2kjtq8cp.jpg

There's no other plumbing going from the pump to the return line. And, the settings in the APEX dashboard are correct (it's plugged into port 1)

http://i1308.photobucket.com/albums/s616/marinereef/APEX_FMM_MODULE_zpsm9qhp3nc.jpg

So, going super conservative on my expectations of what the flow SHOULD be, at 100% (80 watts) the vectra should be pumping 1200+ GPH. This is a brand new pump, no flow restrictions.... so who's right? Or is something wrong with the flow sensor?

vhuang168
04/21/2017, 01:32 PM
How much head pressure do you have?


Sent from my iPhone using Tapatalk

marinereef01
04/21/2017, 01:42 PM
Roughly 7 feet.

http://i1308.photobucket.com/albums/s616/marinereef/head%20pressur_zpsmak6eqyh.jpg

vhuang168
04/21/2017, 02:14 PM
Just in that picture alone I see 6 fittings.


Sent from my iPhone using Tapatalk

marinereef01
04/21/2017, 02:17 PM
Just in that picture alone I see 6 fittings.


Sent from my iPhone using Tapatalk

Okay, it'd still be 7 ft of head pressure :bounce2:

marinereef01
04/21/2017, 05:47 PM
So, I used 2 different Ecotech Vectra M1's and 2 different 1" flow meters and the same exact results. So, I'm leaning towards the vectra M1 is extremely falsely advertised.

FullBoreReefer
04/21/2017, 07:14 PM
How is it plumbed from there? Are you using loc line? If so, what type of nozzles?

FullBoreReefer
04/21/2017, 07:16 PM
Not that it matter for flow, but are you using bushing/size adapters as couplers?

Raul-7
04/23/2017, 06:53 AM
So, I used 2 different Ecotech Vectra M1's and 2 different 1" flow meters and the same exact results. So, I'm leaning towards the vectra M1 is extremely falsely advertised.

Did you try measuring just the pump at 0' head with just the pump and flow sensor?

marinereef01
04/23/2017, 09:27 AM
Yeah, it was about 795 on full speed.

Sent from my SM-G955U using Tapatalk

laverda
04/24/2017, 11:10 PM
Like someone else mentioned I see a lot of fittings there. Each elbow is equal to 3 feet of tubing. I think.you have a lot more the 7 feet of head. I figure at least 16' of head preassure. What size tubing you using and how many other fittings you have is also a factor.

Want2BS8ed
04/24/2017, 11:15 PM
I would suspect the Vectra long before Neptune's meter. The lack of head pressure is atrocious and the L1's are even worse than the M1's.

I have 2 L1's hard piped in a closed loop for 120 DT. 2" intakes, 1-1/2" returns split into 2 x 1" outlets each... the flow is pitiful. And they are both noisy. Sump is in the basement powered by an Abyzz A400. Solid, strong and much quieter.

23' of calculated head pressure and at 65% power, the A400 puts out a steady 1,400 GPH average.

Pricey upfront, but when you consider they come with a 10-year warranty and add in the energy savings over that time period when compared to a traditional AC pump, and they are down right inexpensive.

The L1's will be replaced with Abyzz pumps when they fail.

Love the fluid monitoring. Great information to have and be able to share.

M


Sent from my iPad using Tapatalk

CODE3EMT
04/24/2017, 11:16 PM
I thought Bulk Reef Supply debunked the whole loss of pressure in their 52 weeks of reefing video series. Also if my knowledge serves me correct Terrence at Neptune warned ALL of us to be prepared for readings that were wayyyyyy different than manufacture quotes.

marinereef01
04/25/2017, 06:37 PM
I would suspect the Vectra long before Neptune's meter. The lack of head pressure is atrocious and the L1's are even worse than the M1's.

I have 2 L1's hard piped in a closed loop for 120 DT. 2" intakes, 1-1/2" returns split into 2 x 1" outlets each... the flow is pitiful. And they are both noisy. Sump is in the basement powered by an Abyzz A400. Solid, strong and much quieter.

23' of calculated head pressure and at 65% power, the A400 puts out a steady 1,400 GPH average.

Pricey upfront, but when you consider they come with a 10-year warranty and add in the energy savings over that time period when compared to a traditional AC pump, and they are down right inexpensive.

The L1's will be replaced with Abyzz pumps when they fail.

Love the fluid monitoring. Great information to have and be able to share.

M


Sent from my iPad using Tapatalk
Glad I read this. Just got an L1 in today to make up for the crappy M1, but if they're both crappy, then off to UPS it goes hahaha

TerenceF
04/25/2017, 10:49 PM
I thought Bulk Reef Supply debunked the whole loss of pressure in their 52 weeks of reefing video series. Also if my knowledge serves me correct Terrence at Neptune warned ALL of us to be prepared for readings that were wayyyyyy different than manufacture quotes.



BRS proved that (in their test situation) there was no measurable (and probably insignificant even if there was) flow difference between using a 90 vs. two 45s

Every fitting has an associated straight and level pipe distance equivalent. Even straight and level pipe creates head pressure. Pipes have ratings per 100'. So, add all the fittings, and the horizontal runs, divide by 100 and then multiply times that per-100 factor. Add that to the vertical runs and you will have a good estimate of total vertical head pressure.

Find that number on the axis of the flow graph and then go across to intersect the curve, then go to the other axis. That is what your approximate flow rate will be.

HowieUMD
04/25/2017, 11:06 PM
I switched from 1" PVC pipe and fittings to 2" PVC pipe and fittings across the board and my flow with an L1 nearly doubled when doing so, tried the 1" flow sensor then got a 2" when I switched it all over. I now use an Abyzz with all 2" and only run it at 45%. So much restriction with 1" pvc, it's not even possible to properly measure your head loss. You'd probably get the flow you're looking for by changing everything over to 1.5"...2" wasn't necessary but I planned for the Abyzz when I made the change.

ca1ore
05/01/2017, 11:35 PM
Vectra isn't good against pressure. OP has it restricted own to 3/4" which is going to kill the flow (as he experienced).