piping question s.milne

ScottMP

I did'nt show the other zones off this boiler to keep it simple. The whole house is done off the boiler. Both zones have flow checks, so that, coupled with the the mixing valve and what Art says about the coil should be fine.

I believe the floor has been marginall at best here, and the toespace has been running the room most of the time. I am trying to get the floor to do more.

Alan, the drawing was done in MS paint. I am getting better. I have ME's symbles but need to learn how to transfer them to paint.

Thanks

Scott





<A HREF="http://www.heatinghelp.com/getListed.cfm?id=237&Step=30">To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"</A>

ScottMP

tee spacing

Trying to correct a bathroom heating that some one else did. They have a radaint floor with a toespace. The toespace is off a thermosate and the floor works off a slab sensor. I believe the floor sensor is set to low at 75, and the temperature of the mixs is way to high at 165 ( ouch).

We are turning the floor sensor to 95 and the temperature to 140 ( staple up ).

I have a question about the pipe layout. The tees off the feed and return off the primary loop are 9" apart for both the toespace and the radiant.

Any problems here ?

Oh, also the return of the primary has a ball avle that is throttled way down. Before I change anything, any reason that would have been done ?

Scott

To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"

Alan(CaliforniaRadiant)Forbes

Tee spacing

Getting those tees closer together will reduce any chances of phantom flow through your secondary piping.

As far as that partially closed ball valve, you can run a high temperature loop through the floor if you restrict flow. I believe Danfoss and others have a thermostatic valve that does the same thing.

Nice drawing.

Best wishes,

Alan

To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"

Art Pittaway

Piping may be ok,

because the kickspace heater is cycled by fan on/off, having a small "ghost flow" will just keep the coil warm. The radiant is controlled by a 3-way and that will stop flow. The 95* for the floor may be a bit high,if the HO can be shown how to set it, they can change it to what they want. I used to use the tekmar 152, 2 stage with an out door sensor and the floor sensor in series. When ever the outdoor temp got above 65* or ??* it would shut down the floor, below that the floor sensor kept the temp at ??*. If the H/O can set it there won't be a call back about comfort.
Unless it's a big bathroom, it seems to be a small job for a boiler, is there any other load? How big is the boiler?
Just some thoughts, Art