21
In accordance with your calculations as to requirements
for balancing orifices, mount the orifice in the outlet of
the plenum take-off (see Figure 2.32), prior to attaching
the supply tubing.
Next, install a kwik-connect in the open end of the supply
tubing, using the same procedures as before, and twist
together kwik-connects on supply tubing and plenum
take-off. Wrap connection securely with tape.
Return Air Box & Duct Installation
Remove the return air grill from the return air box and
remove the air filter from the return air grill.
Insert the return box from below for ceiling installation (or
from the front for wall installations) and fasten with four
screws through holes provided on the long side of the
box. (see Figure 2.33).
FIGURE 2.31: PLENUM TAKE-OFF FASTENER INSTALLATION
FIGURE 2.32: ORIFICE INSTALLATION
FIGURE 2.33: RETURN AIR BOX INSTALLATION
Remove the grill and the filter from the grill frame.
Insert the frame into the box and mount in place with the
screws provided through a hole at each corner of the frame.
Finally, place the air filter into the frame and replace the grill.
Turn the latches a quarter turn to lock the grill in place.
Slide a clamp band (provided with return air box) over
one end of the return air duct. Place that end over the el-
liptical flange on the fan coil unit (see Figure 2.34). Move
the clamp over the flange and tighten so the clamp holds
the return air duct securely to the flange. Follow the same
procedures to attach the return air duct to the return air
box (see Figure 2.34).
FIGURE 2.34: RETURN AIR DUCT INSTALLATION
1. HAND INSERT FASTENER INTO PLENUM TAKE-OFF 2. WITH PLIERS, SNAP FASTENER INTO PLACE UNTIL IT LOCKS IN PLACE
Return Air Box & Duct Installation
Remove the return air grill from the return air box and re-
move the air filter from the return air grill.
Insert the return box from below for ceiling installation (or
from the front for wall installations) and fasten with four
screws through holes provided on the long side of the
box. (see Figure 2.35).
Remove the grill and the filter from the grill frame. Insert
the frame into the box and mount in place with the
screws provided through a hole at each corner of the
frame. Finally, place the air filter into the frame and re-
place the grill. Turn the latches a quarter turn to lock the
grille in place. Slide a clamp band (provided with return
air box) over one end of the return air duct. Place that
end over the elliptical flange on the fan coil unit (see Fig-
ure 2.36). Move the clamp over the flange and tighten so
the clamp holds the return air duct securely to the flange.
Follow the same procedures to attach the return air duct
to the return air box (see Figure 2.36).
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