Nortek P7RE Series, Installation Instructions Manual

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Figure 2. Single & Multiple duct applications
MultiPle duct aPPlication Single duct aPPlication
air conditioner inStallation
unpacking the unit
It is recommended that the unit be unpacked at the
installation site to minimize damage due to handling.
caution:
do not tip the unit on its side. oil may enter the
compressor cylinders and cause starting trouble.
if unit has been set on its side, restore to upright
position and do not run for several hours. then
run unit for a few seconds. do this three or four
times with five minutes between runs.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3. Carefully remove the top cap and tube.
installing return & Supply air collars
If the supply and return collars are supplied with the
unit, they will be located in the supply duct. They can be
easily positioned over the unit openings (
Figure 3 ) and
secured with sheet metal screws. Return and supply duct
opening sizes are shown in
Figure 9 & Table 4, (page
12) . note: Before permanently installing the collars,
it is recommended you pre-fit them over the openings first
to determine alignment and best fit.
Supply Duct
1. Position the supply duct collar so the edge of the unit
opening fits between the flange and the bead.
2. Overlap the collar ends keeping the small screw holes
underneath.
3. Align the holes in the crimped area and install one
screw. note: It may be necessary to loosen the four
screws that hold the transition duct in order to install the
supply fitting. Re-tighten when installation is complete.
4. Tap collar (if necessary) to ensure engagement with
unit opening and install second screw.
5. Tighten first screw and rotate collar clockwise so joint
is near 3 o’clock position.
• Duct work should be attached directly to the unit flanges
for horizontal applications.
• For highly resistive duct systems it may be necessary
to add an additional return air duct and or supply to
achieve maximum performance and prevent coil icing
and refrigerant flood back.
• The air conditioning output of the system will not
cool the home if air is lost to the outside through
leaks in the duct system. ducts that are collapsed
or restricted by foreign objects will also prevent
adequate air flow.
• All duct work passing through unconditioned space
must be properly insulated to minimize duct losses
and prevent condensation. Use insulation with an outer
vapor barrier. Refer to local codes for insulation material
requirements.
Transition
Duct Screws
Supply Air
Return Air
Duct
Dimples
Figure 3. return & Supply air collars