Slide the heat exchanger into the hole for a test fit. Ideally the tubes (D and E) should
stick out of the plenum [see diagram on previous page]. The header and tubes (F) can
stick out of the plenum as well, if necessary.
As long as the whole coil surface (B) is in the plenum, you should be good even if a little
more of the header (F and even G) sticks out.
While test fitting it, try to determine how much tape is needed around it. A different
amount (thickness) may be needed on different sides. You can purchase different
thicknesses of tape so that it will fit and seal properly.
Place foam tape around the outside of the heat exchanger to seal it off so that it fits tight
and air can’t blow by it.
The heat exchanger needs to be installed so it won’t move around. The easiest way is
to fabricate some pieces of metal into an ‘L’ shape, approx. the length of the heat
exchanger like shown below.
This is what the braces will look like. Very simple. Rivet or screw into place.
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