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Posted by Bill on March 04, 2006 at 19:48:11:
In Reply to: Re: Short Recycling Periods posted by Heatpro on January 05, 2006 at 21:38:10:
I contacted the builder and advised them of the problem and what I (you) believed the apparent solution was. (The max circuit length for the Taco 007 is 100 feet and our circuit is about 253 feet.)
They sent the plumber (sub) back out and had him swap out the Taco 007, with a Taco 0010, and turn the heat up on the furnace to 210 - instead of splitting the circuit up. They argued the 30 GPM pump would solve the problem.
(Their next plan, IF this didn't work, is to put insulation on the line (return) at the furthest end of the house from the furnace.)
Oops... The furnace is not only recycling too often, but also erratically now (10 minutes on, 15 minutes off, 3 minutes on, 3 minutes off, etc.).
I put a thermometer on the return line tonight. The furnace is set at 210 degrees, the supply is going out at 190 degrees and the return is coming in at 140-150 degrees.
I know, when I call, they're going to want to come back and insulate the pipes...
Can you tell me what the maximum loop is for the Taco 0010 for 3/4 inch pipe? I haven't been able to find it anywhere.
Also, splitting the current loop into two and adding a 1 1/4" return will put each circuit between 160-180 feet. Can the Taco 0010 handle that, or should there now be 3 loops?
Any help would be greatly appreciated...