Help with monoflo

Justin Gavin

Heh Fellas,

I am a little stuck on a problem. I have a job giving me a hard time. On one particular zone (controlled by zone valve) I have a set of baseboards that can't seem to get flow through. There is one diverter T (Taco type)at the return side of the baseboard. I get heat via thermosiphen on the end of the baseboard loop and the same at the beginning. I cant seem to get any flow between the baseboard. I was thinking on adding a couple of ball valves to make some more pressure difference. Any other ideas?

Thanks,

Justin

mp1969

Monoflo

If I recollect correctly the monoflo tee should be on the supply side of the baseeboard and a regular tee can be used on the return side. If it is indeed on the return side you would be fitting the flow and reducing it!

MP1969

Justin Gavin

Diverter T's

They look more like Diverter T's. The brand name is Taco.

Thanks,

Justin

Steve_35

Monoflo flow

Are you absolutely 100% no-question about it sure the monoflo is in the right way?

Is the piping between the standard tee and monoflo tee long enough?

Justin Gavin

Yes seems to be.

It is piped correct as far as I can tell. The problem area is like this. I come out of the main loop (1 1/4") to a 3/4"T then go about 4 ft into about 4 feet of cast iron baseboard then it is coupled to another 6 feet of slant fin. Then it drops down below the crawl space for another 10ft and then it connects to another 9ft of copper baseboard drops back down below the crawlspace for about 14 ft back to a taco diverter T back into the main loop. The only time I get heat into either baseboard is when I bleed the baseboard. I can't seem to get flow through the loop at all. I even put in a ball valve after the diverter T to try and create more of a pressure drop but that doesn't seem to do the trick. I thought of putting another diverter T in reverse where to first non-diverter T is but no wholesalers in the area have one in stock. Another thought I had was to Place another T after the zone valve and feed the problem baseboard with its own supply and return. I'm running out of options and I feel like I am making a career out of this one (ha ha). Another problem is that the Kitchen has a convection radiator that has a MonoFlo T that is too close and doesn't want to flow. They said it worked before but I don't see how it could have they are literally 3 inches apart. So I was going to pipe them with its own supply and return.

Any other suggestions without reinventing the wheel? I appreciate the help.

Thanks,

Justin

Roger_5

How old is the circ pump

The impellor on the circ pump may be comprmised and you don't have the gpm you think you have. With out looking at the system it sounds like you are expecting too much from the diverter tee. I have had several one pipes with the tee's side by side work for years with no problem. It is reccomended they be three feet apart for best results. Your two tee idea is the best of your possible solutions and should correct the problem. Keep in mind each tee affects over all flow and head of system.

mp1969

Taco Recommends

Justin,
Go to : www.taco-hvac.com You will have to look under flow control and then down to Venturi fittings. I found three ways to install the venturi fittings complete with drawings.
Good luck!

MP1969

GaryDidier

Poor Heating

Justin, If I understand your description correctly it seems that there is to much pressure drop to be overcome by divertor tees in this run. You should run this on its own circulator, either as part of the same zone or on its own.

Gary from Granville