Square Duct Board Installation Manual

At the plenum location selected for attaching the supply tubing,
cut a 2" diameter hole in the plenum with the SpacePak plenum
hole cutter (see Figure 2.24).
Rotate the cutter (Part Number BM-6822) as pressure is
applied to force the serrated edge through the aluminum foil
and insulation. Remove the hole cut-out from the plenum.
Make sure there is no “flap” left inside plenum that could block
hole during operation.
Place the plenum take-off gasket on the back side of the
plenum take-off and insert the assembly into the hole in the
plenum. Hand insert the four plenum take-off fasteners one at
a time such that each clip reaches the interior of the duct.
Using the SpacePak pliers, snap the fasteners into place until
they lock securely (see Figure 2.26).
NOTICE: Gasket must be installed to seal plenum take-off
to prevent air leakage.
NOTICE: All four fasteners must be installed to assure air
tight fitting between plenum take-off and plenum.
Installation instructions for room terminators, sound attenuating
tubing and supply tubing are provided in installation manual
supplied with fan coil unit (Section 2).
4
Plenum tee and elbow fittings may be installed at any point in
the plenum duct run. If installing a fitting at the end of a full
plenum section (see Figure 2.16), insert female end of fitting
onto duct. If installing a fitting at a “cut” in the plenum duct (see
Figure 2.16), form a field-fabricated flange (1-1/2" wide) in the
duct and insert male end of fitting into duct. Tape the joint
securely.
An end cap must be installed at the end of each duct run. The
cap contains an insulating cushion which is pushed up tight
against the duct end. (If installing end cap at the end of a full
plenum section, remove shiplap joint first). Holding cap firmly in
place (see Figure 2.17), insert flat head pins through the holes
in the end cap. Remove paper backing on rectangular foam
pieces and place over pin heads. Tape cap to the plenum duct,
completely around the seam.
NOTICE: Installation of endcaps should be completed after
all plenum take-offs have been installed. The duct shavings
produced with take-off installation will be blown into the
space to be conditioned if sealed into duct system.
FIGURE 2.17: PLENUM END CAP INSTALLATION
FIGURE 2.24: CUTTING HOLE IN PLENUM
FIGURE 2.16: PLENUM FITTING INSTALLATION
SPL-0046B
PLENUM TAKEOFF
GASKET
PLENUM DUCT
FASTENER
FIGURE 2.26