Mixing Block

Tony_8

I went to the job today to get paid and found out the new owner is someone I have a good history with :) I get to keep the house !

Here are a couple of pics, one before and two after.

Tony_8

finally !

It came ! Got it installed Thursday. Piece of cake.

One minor glitch, I wanted to use it in Delta T mode. The manual, 16 pages of it, says to do this you must shut off outdoor reset mode. It just doesn't say HOW. Tech service was helpful once they found out the answer and called me back. I am a little skittish pushing buttons on an electronic control I'm not familiar with as an experiment, especially if I would have to pay for the replacement.
Anyway, to shut off ODR, adjust the outdoor design temp higher than 32F and it goes to off as 32 is the max.

The most disappointing thing about the job was finding out at the end of the day that my customer sold the house. I was anticipating rave reviews for my revamping of a poorly installed and controlled "system" They've never been able to use the finished basement pad system because of it's poor design, and the garage pad would suck the heat out of the boiler so fast NOTHING else would work sufficiently. Hopefully the new owner will read my tags on the valves,etc. and call me for future service.

Weezbo

Good deal! new gizmos are the fun of it:)

when we get it to work ...the guniea pig feeling goes away

ernie_3

a letter goes a long way

Possibly a letter to the new owners explaining the history of problems would help. Offer a free consultation to 'explain the system' This may lock in the customer...nothing ventured nothing gained. Don't rely on tags to hope for their business.

Nron_9

Mixing block

Hey not hard to tel the before and after shots , could you post some info on the mixing block havenot seen or herd of this yet in canada

Kal Row

it's so sweet...

i only wish they made it in btu capacity and flow rates for baseboard systems

Tony_8

Taco

Makes it. They call it their "Radiant Mixing Block". Incorporates variable speed injection into the system in one assembly and controller.

I'm sure their website has all the info you could need.

Tony_8

flow rates

Did you look at the curves ? Up to 15 ft head and 12 GPM on the system side. It appears to be a 007. I think it would handle a 40K load.

Kal Row

looking to feed zone manifold in 100-150k range 1.25\" copper

Weezbo

Kal...

my thought is to put 3/4X 1" male (copper) adaptors on the block....for the 120K it is capeable of and the flow rates i see no problem with this......

Kal Row

at lets say D-T of 20 for 180/160f 117kbtu...

1.25" pipe is required for the 17gpm flow and 1" for the injection curcuit (boiler hi at 190f) , according to the taco's chart on the RMB, it's a no can do - which is a pity - since the system i installed with pri/sec/inject-tekmar362 operates most of the time with the boiler at 150 and system supply at 136f very well withing the RMB's range - dont you just hate design points? - i am using 3 15-58fc's with boiler and system set for speed 3 and injection set for speed 2 - and letting the teckmar modulate from there - it's just as efficent as the RMB, just a lot of work to install - the RMB has unique internal pipeing which eliminats the 18" ghost flow heat trap required on a reg injection setup

Kal Row

say Weezbo

i think the diagram below is the equivalent to the RMB - in order to guarantee adequate flow through the boiler – pump #1 would have to run full speed - I wonder if a tekmar 362’s injection would work if I just hooked up the injection ouput to pump 2 – where is hydronicsmike from tekmar when we need him

Weezbo

when you think it is close.....

consider the designe parameters...it is always wise to be safe than sorry. having said this sometimes having someone you work with that you feel is in your neighbourhood sort to speak is often a good thing too. that way you can disscuss the idea with them and sometimes they will catch something you missed.maybe its the other way around. say! we dont have to do that! we can diversify this system like this and add such and such ...Wow! hey yeah how about putting a relay on that adding this zone valve with a set point around the devise and Voila! Something Not even the famed and fabled EVER considered:) take a look at going along with the program and do your own thinking...... you know thebasic H of the designe of the Taco Pump block...and you have a pretty good clue on what you have to get done,can it be done another way , sure...is there no more than one other way to accomplish what you need done....say it isnt true.your experience often tells you immediately what you already know:) Realizations the B with an itch. mostly because realization comes a bout two years too late! when you find you have 22.8 amps on the breaker(on start) and its a 20 amp can you get it to work? well if YOU are the only one who knows how to get it to work maybe that aint a good thing.maybe the next guy who comes along will not dig it and conclude its never been Right.and will set to fixing something that aint Broke:) so what i am saying is there are alot of variables and i am not into buying into something sight un seen over a telephone ..my thought is that with all our options theres lots of versatility in designe...the only thing that i see as a possible detrimental aspect is that you might want to consider the return temps your boiler will see and that perhaps theres a way to use an additional zone valve supplying a set point temp and reduce some of the load on the pump block ...it is a component and as such can be added for an additional header for example with completely seperate designe parameters.. to use your designe id ask what means of mixing these flows are you intending to use? two 1&1/4" T's?are you remembering the supply side check>? the tek mar can do lotsa stuff:) it cannot however make up for plumbing differences its not a gizmo that will magically cause stuff to work the way we want it necessasairily..about now you think i am sounding like the tekmar salesman:))....... i build things to work when this or that fails...and so does the Taco crowd:) i really likey the taco block. I aint bad mouthing callefi or viessmann or any one else there are other modulating mixers etc however i really like the Taco I valves also:) Green is good:) I like Green:) you done did the tekmar stuff Think Green:) forget the 4 way modulating mixer for a while:)

Kal Row

the flow arrows on top are also springs checks...

rmb electronics are tekmar of course and seem similar to the tekmar 36x family - just compare wiring diagrams and manuals - even the screens are similar, so i cant be that far off - however i set mine up with the boiler pump at full speed, for boiler hot spot protection, so it would really need a pump per zone on the system side if you have a lot of head in the zones - which according to ziggi - is the way to go - “mini-tube” style zone injection

this is all academic anyway – the RMB has it’s place and discrete pumps have their place, and tekmar takes care of you either way (who's the tekmar salesman now )

Weezbo

shhhh....:)

had to stop in early today to find out what day it is:) once i find out i will either go to work or go to class before i go to work:) i agree with you it sure would look good in green though... just do it right so you set a good example:) hab a good day *~/:)....