In accordance with your calculations as to requirements
for balancing orifices, mount the orifice in the outlet of the
plenum take-off (see Figure 2.27), 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 2.28).
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PLENUM
FASTENER
GASKET
PLENUM TAKE-OFF
GASKET
PLENUM TAKE-OFF
PLENUM
FASTENER
1. HAND INSERT FASTENER INTO PLENUM TAKE-OFF
2. WITH PLIERS, SNAP FASTENER INTO PLACE UNTIL IT LOCKS IN PLACE
FIGURE 2.26: PLENUM TAKE-OFF FASTERNER INSTALLATION
FIGURE 2.27: ORIFICE INSTALLATION
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RETURN AIR
BOX
RETURN AIR
FILTER GRILL
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FIGURE 2.28: 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 elliptical flange on the fan coil unit (see
Figure 2.29). 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 2.29).
Winter Supply Shut-Off Installation
Simply snap winter supply shut-offs into the room
terminator openings (see Figure 2.30). Wrap the return air
filter in a plastic bag and reinstall it to block the return air
opening. Winter supply shut-offs prevent moisture from
collecting in ductwork during winter months. Be sure to
remove the plastic bag and all supply shut-offs before
operating the system.
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ROOM
TERMINATOR
WINTER
SUPPLY
SHUT-OFF
FIGURE 2.30: WINTER SUPPLY SHUT-OFF
FIGURE 2.29: RETURN AIR DUCT INSTALLATION
