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NOTE − For horizontal applications, a secondary drain pan
is recommended. Refer to local codes.
Use the following procedures to configure the unit for
horizontal left−hand discharge operations:
Step 1.
Remove access panels. Remove corrugated
padding from space between the blower and coil
assemblies. Discard drip shields which are
shipped inside corner post packaging. The
shields are used in down−flow applications only.
Step 2.
Slide coil assembly from unit. Remove the
horizontal drain pan.
Step 3.
Remove drain plugs from back drain holes on
horizontal drain pan. Reinstall plugs on front
holes.
Step 4.
Rotate drain pan 180° front to back and install it
on the opposite side of coil.
Step 5.
Remove screws from top cap. Remove
horizontal drip shield screw located in the center
of the back coil end seal as illustrated in figure 5
on page 6.
Step 6.
Rotate horizontal drip shield 180° front to back.
Step 7.
Remove plastic plug from left hole on coil front
end seal and re-install plug in back hole.
Step 8.
Reinstall horizontal drip shield screw in front coil
end seal. Drip shield should drain downward into
horizontal drain pan inside coil.
DRIP
SHIELD
CABINET
SUPPORT
90º
BEND
DRAIN PAN
REINSTALLED
HERE
REINSTALLED HERE
COIL SHOWN IN UPLOAD POSITION FOR EASY CONVERSION
TOP
CAP
90º
BEND
Figure 5. Field Modification (left−hand air discharge)
505341M 04/08
TOP CAP ROTATED TO
CORRECT POSITION
TOP CAP SCREWS
DRAIN PAN
SHIPPING
LOCATION
DRAIN PLUGS
REMOVED FROM HERE
ALIGN HOLES
WITH HOLES
IN COIL END
PLATE.
BACK COIL
END SEAL
Step 9.
Rotate top cap 180° front to back and align with
unused screw holes. Holes must align with front
and back coil end plates. Note that top cap has
a 45° bend on one side and 90° bend on the
other. The 90° bend must be on the same side
as the horizontal drain pan as illustrated in figure
figure 5.
NOTE − Use extreme care when reinstalling screws into
coil end plate engaging holes. Coil damage could result by
misalignment.
Step 10. From the up−flow position, flip cabinet 90° to the
left and set into place. Replace coil assembly.
Secure coil in place by bending down tab on
cabinet support rail as illustrated in figures 4 and
5.
NOTE − For horizontal applications in high humidity
areas, remove the down−flow rail closest to the drain pan.
To remove rail, remove screw from rail at back of unit and
at cabinet support rail. Remove down−flow rail then replace
screws. Also, seal around the exiting drain pipe, liquid and
suction lines to prevent infiltration of humid air.
Step 11. Knock out drain seal plate from access door.
Secure plate to cabinet front flange using the
provided screw.
Step 12. Flip access door and replace it on the unit.
Step 13. Set unit so that it is sloped 1/4 inch towards the
drain pan end of the unit as illustrated in figure
6. Connect return and supply air plenums as
required using sheet metal screws.
Step 14. If suspending the unit, it must be supported
along the entire length of the cabinet. If using
chain or strap, use a piece of angle iron or sheet
metal attached to the unit (either above or below)
so that the full length of the cabinet is supported.
Use securing screws no longer than 1/2 inch to
avoid damage to coil or filter as illustrated in
figure 3 on page 5. Connect return and supply
air plenums as required using sheet metal
screws.
THIS CORNER
SHOULD BE
1/4" HIGHER
THAN DRAIN
CORNER
DRAIN CORNER
LEFT−HAND AIR DISCHARGE
SHOWN; TYPICAL FOR
RIGHT−HAND DISCHARGE
Figure 6. Sloping for Proper Drainage
DOWN−FLOW AIR DISCHARGE APPLICATIONS
Use the following procedures to configure the unit for
down−flow operations:
Page 6
THIS CORNER
SHOULD BE
1/4" HIGHER
THAN DRAIN
CORNER
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