Rheem WSPM 018J, Installation Instructions Manual

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Figure 2. Single & Multiple Duct Applications
MULTIPLE DUCT APPLICATION SINGLE DUCT APPLICATION
SUPPLY AIR
RETURN AIR
Transition
Duct Screws
Duct
Dimples
Figure 3. Return & Supply Air Collars (Optional)
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.
Return Duct
1. Assemble the collar by overlapping the two ends.
NOTE: One
end of the collar is slotted and the opposite end has two small
holes. Position the end with small screw holes underneath
the slotted end.
2. Fasten the collar ends with two self drilling sheet metal screws.
3. Position the collar over the unit opening. Align the four holes
in the collar with the four dimples or holes (depending on unit
model) in the panel.
4. Secure the collar to the rear panel using self drilling screws
(10-16x.5).
Locating & Installing the Return Air Assembly
To simplify installation, locate and install the return air assembly
first. If desired, the return opening can be located inside a closet
with louvered doors that has an open area equal to or greater
than a 12” x 20” grille. The return air grille can be placed in the
wall of a closet and the air ducted into the filter box through a
boxed-in area at the closet floor level ( Figure 4 (page 6) ).
Verify the filter is readily accessible.
NOTE: The return air box with grille and filter should not be
located in heavy traffic areas like hallways or center of rooms.
A good spot is in a corner or under a table, if a minimum two
inch clearance is available.
• 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.
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 and cause damage.
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 (Optional)
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 supply and return ducts ( Figure 3 ) and secured with
sheet metal screws. Return and supply duct opening sizes
are shown in Figure 9 & Table 3, (page 11) .
NOTE: Before
permanently installing the collars, it is recommended you pre-fit
them over the openings first to determine best fit and alignment.
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.