toe kick heater

Chris_10

I messed up and piped the supply on the top and the return on the bottom of the Quiet One 2008 kick space heater I installed last week , yes i piped it in opposite. As it stands now the supply gets to hot to touch , the return gets warm and even less warm when the fan runs , so it's at least getting the fan to turn on. The unit is about 6' from the 1"C main so i used two 1x1/2 monoflow tees spaced about 18" apart.
Will it make much difference if i reverse the supply and return connections and i also have some concerns about the momoflow tees , does brand matter? (mine were made outside the USA. Just want this baby to work to it"s best potential. THANKS!!!

Ken_15

The supply and return are really important for air purging. If you have good flow you should be all set. It sounds like you dont though. I am more concerned with using two monoflows.

Mark Eatherton1

Reverse piping

Whenever you have a high pressure drop through the terminal unit, as you do, you must use two flow diverting fittings, one as a diverter (gozinta) and one as a venturi (gozouta). As for the fan not turning on, you will probably need to move the thermodisc snap switch to the opposite side of the FCU.

It is also generally recommended that there be some means of manually purging the unit, because power purging the main rarely gets the air completely out of these units.

Good Luck

ME

Chris_10

Thanks for the replies. I didn't think it would matter which way the feed & return entered the unit but then i checked out the online installation instructions and notice that they show the feed on the bottom and the return on top, of course i piped it opposite thinking as the hot water cools it would naturaly want to go down hill. I plan to fix this and see if it works better. But as i said before the fan does come on so it's reaching 130 degrees. Thanks

Mark Eatherton1

FYI...

The German standard for fitting up a DHW tank is to take the hot into the top and return out the bottom. If ANY situation posed a problem for getting air out, this would be it. Done properly we've never had a problem. And it DOES make a difference in overall thermal performance. Creates a counterflow condition.

ME

Ken_15

The quiet one has an air purger on the face of the unit. I have installed many of these units and haven't had any problems using a regular tee on supply side and monoflow on the return side. All of my monoflow tees are stamped with flow direction. I don't understand how you would get flow into the unit using two. Do you install on of them backwards?

Ken

Mark Eatherton1

Yup...

One (the gozinta) is installed backwards and acts as a diverter tee. The other one (gozouta) is installed as a standard venturi tee in its normal pattern. The whole package causes more flow through the high pressure drop device. This should also be the case if the heating unit is lower than the main because hot water doesn't want to flow down, and cold water doesn't want to flow up. It requires more "inducement", hence a diverter and a venturi tee.

The attached picture is a diverter/venturi tee assembly I made up for the Buderus radiators I have in my homes one pipe system. The radiators tappings are 2" O.C., hence the extra modifications.

ME

Chris_10

Yes thats how i did it. I was advised because of the distance (approx 6') between the unit and the main to use two momoflows.

Chris_10

So should i be happy that the thing works and the fan is comming on and not be concerned that the return 1/2c pipe is not hot just warm? I'll check it out tomorrow, maybe when i purged all that water out it was sitting in the bottom of the unit and coolimg things off a bit.

Mark Eatherton1

If it ain't broke...

and your customer is satisfied with the output, don't fix it. The unit is expected to make a large differential in the temperature, especially with the low flow that your set up is runnig through the branch tees. You could have 4 GPM on the main, and only .5 GPM on the branch, but .5 GPM will deliver about 5,000 btuH at a 20 degree delta T, and more with a greater differential.

Are they comfy?

ME

Chris_10

Thanks mark , If I find out anything interesting i'll let it be known.