At the plenum in the location selected for attaching the
supply tubing, cut a 2" diameter hole in the plenum with
the Space-Pak plenum hole cutter (see Figure 2.24).
This hole should be cut on the side approximately at a
20° downward angle to eliminate strain on the plenum
take-off when tubing is attached. Rotate the cutter 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 (see FIgure 2.25).
NOTICE: Gasket must be installed to seal plenum
take-off to prevent air leakage.
Orient the plenum take-off to match the curvature of the
plenum duct. Hand insert the four plenum take off
fasteners one at a time and using the Space-Pak pliers,
snap the fasteners into place until they lock in place (see
Figure 2.26).
NOTICE: All four fasteners must be installed to
assure air tight fitting between plenum take-off and
plenum.
15
At the plenum, all supply tubing connections must be a
minimum of 18" from any plenum tee, plenum elbow, the
fan coil unit or another supply tubing connection.
Individual supply tubing runs must be a minimum of
6-feet, even if the distance between the sound
attenuating tubing and plenum is less than 6 feet.
Supply tubing comes in 100-foot sections and may be
cut to length with a knife or fine tooth hacksaw.
For each supply tubing run, estimate and cut the length
of tubing that will be needed between the plenum and
sound attenuating tubing. At the open end of the supply
tubing which will attach to the sound attenuating tubing,
install a kwik-connect (see Figure 2.22). First, push back
the cover and the insulation exposing the inner core.
Second, twist a kwik-connect into the inner core. Third,
pull down the insulation and cover, and tuck it into the
deep groove on the back of the kwik-connect. Fourth,
wrap the connection securely with tape.
When finished, simply twist together (see Figure 2.23)
the kwik-connect on the sound attenuating tubing, and
wrap the connection securely with tape.
After attaching the supply tubing to the sound attenuating
tubing, bring the open end of the tubing to the plenum.
4" MINIMUM RADIUS
FIGURE 2.21: MINIMUM TUBING BEND
AA
AA
AA
FIGURE 2.22: KWIK-CONNECT INSTALLATION
FIGURE 2.23: CONNECTING TUBING
AAAA
AAAA
AAAA
AAAAAA
20°
FIGURE 2.24: CUTTING HOLE IN PLENUM
PLENUM
GASKET
FIGURE 2.25: TAKE-OFF INSTALLATION
