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2"
Figure 3. Ground Level Installation
Rooftop
Rooftop installations must be located according to local
building codes or ordinances and these requirements:
• The roof must be capable of handling the weight of the
unit. For unit weights, see Table 4 (page 14). Reinforce
the roof if necessary.
• The appropriate accessory roof curb (Figure 4) must
be installed prior to unit installation. The roof curb
must be square and level to ensure proper condensate
drainage. Please follow all instructions provided
with the kit.
• Secure roof curb or frame to roof using acceptable
mechanical methods per local codes. NOTE: Make sure
the two supports beneath the unit have been removed.
Roof
Curb
Figure 4. Roof Top Installation
Horizontal to Downfl ow Conversion
The unit is shipped ready for horizontal duct connections.
If down fl ow ducts are required, the unit must be converted
following the steps below for the supply and return ducts.
1. Locate the duct cap inside the duct openings and
remove the screw holding it in place.
2
Lift the cap out of the unit. (Hint: The cap can be
pushed up from the bottom by reaching through the
fork slot).
3. Cover the horizontal duct opening with the horizontal
duct cap. The insulation will be on the indoor side.
4. Fasten the cover with screws to seal.
8
Securing
Screws
Figure 5. Internal Filter Rack Location
Removal of Internal Filter Rack (3 Phase Only)
1. Remove the return air panel from the unit.
2. Remove the height adjustment screw from the inside
of the rack.
3. Remove (1) screw securing the assembly to the
coil located on the left leg of the rack. NOTE: The
assembly can now be easily collapsed and removed
from the unit. See Figure 5 for fi lter rack securing
screw locations.
Installing Filters in the Filter Rack (3 Phase Only)
1. Remove access panel screws from return air panel.
(Hint: Loosen the unit's top panel screws near the
top edge of the access panel. The access panel was
designed to be captured underneath the top panel.)
2. Slide the fi rst fi lter between both guide channels of
fi lter rack and allow the fi lter to drop easily into place.
3. Verify the bottom of the fi lter is within the channels
of the rack.
4. Slide the 2nd fi lter between both guide channels of
fi lter rack.
5. Verify the bottom of the fi lter is within the channels
of the rack.
6. Replace access cover by sliding the top edge of panel
under the lip of the unit's Top Panel. Secure access
panel by replacing the screws.
Removing Filters from Filter Rack (3 Phase Only)
1. Remove access panel screws from return air panel.
(Hint: Loosen the unit's top panel screws near the
top edge of the access panel. The access panel was
designed to be captured underneath the top panel.)
2. Remove upper fi lter by gently pulling fi lter through
the access panel opening.
3. Remove lower fi lter by lifting media to top of fi lter
rack. Remove in the same manner as described in
step 2.
4. Install new fi lter in the fi lter rack as described in the
previous section.
Condensate Drain
Condensate is removed from the unit through the 3/4"
female pipe fi tting located on the front side of the unit.
Install a 2 inch condensate trap in the drain line of the
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