7
Downflow Conversion
Conversion to downflow MUST be performed in an area that
allows access to all sides prior to placing the air handler in its
final location. To prevent the evaporator coil pan from “sweat-
ing” the DPI accessory insulation kit is to be used when per-
forming this conversion. NOTE: The DPI kit is not supplied
with this product and is to be purchased separately. See
Table 7
for the correct DPI kit.
ASPF
Insulation Kit
1830
DPI36-42/20
3137 / 4260
DPI48-61/20
Table 7
Refer to
Figures 3 through 5
for the location of the compo-
nents referenced in the following steps.
Figure 3
illustrates
the new installation location for the removed components.
1. Before inverting the air handler, remove all access pan-
els, the coil rear channel bracket, and the filter close-off
panel.
2. Remove the evaporator coil and the horizontal drain pan.
Discard horizontal drain pan.
3. Install the provided plastic plug into the vacated access
panel.
4. Remove the two (2) zee coil support brackets and insu-
lation retaining brackets.
5. Remove the tie bracket.
6. Install the DPI Insulation Kit onto the bottom of the drain
pan.
NOTE: The filter provision is not applicable
in THIS downflow application.
ACCESS
PANEL
RETURN AIR SIDE
OF UNIT
REAR CHANNEL
BRACKET
ZEE COIL
SUPPORT BRACKET
COIL RETAINING
BRACKET
TIE BRACKET
Figure 3
7. Install the zee coil supports and the wrapper stiffeners.
8. Install the tie bracket.
9. Install the rear channel bracket.
10. To prevent possible condensate “blow off” the insula-
tion retainers are to be laid into the evaporator coil pan
as shown in
Figure 4.
3” FLAT INSULATION
RETAINER
(BOTH SIDES)
Figure 4
To complete the conversion, slide the evaporator coil into
the chassis and attach the three (3) access panels.
(Figure
5).
WRAPPER
INSULATION
JACKET
ZEE COIL
SUPPORT
WRAPPER
STIFFENER
DRAIN PAN
INSULATION KIT
BLOWER
ASSEMBLY
Figure 5
NOTE:
When converted to downflow position, the coil may
protrude above the cabinet on some models.
Horizontal Conversion
The only field modification required for conversion to “Hori-
zontal Right-Hand” is the removal of the plastic knockouts in
the horizontal panel drain connections. To prevent the hori-
zontal drain pan from sweating in high humidity applications,
it is recommended that a DPIH insulation accessory kit be
used. NOTE: The DPIH insulation kit is not supplied with this
product and should be purchased separately. See
Table 8
for the correct DPIH kit.
