Install Instructions

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IM-PR 566442 1114 (Design Manual)
Step 2: Drilling tubing holes
Determine where the manifold will be located and which end of the bays the tubing will be returning
down. Use a right-angle drill with a 1¼" bit to drill a series of holes through each floor joist on the return
end. Keep holes at least 3" from the subfloor to avoid floor nails. To maintain structure integrity it is
recommended to drill the holes in the center of the floor joist.
Map out the circuits and determine which bays go to which circuits. Be careful not to exceed maximum
circuit length for the size of tubing you are using (⅜" - 300 ft., ½" - 400 ft.).
NOTE: Be sure to check with local building codes to ensure no structural damage will occur with
drilling the joists.