5
6. For Downflow Installation:
a.
Position the unit in the downflow position.
b. Using the drain pan to hold the coil assembly,
slide the coil assembly back into the cabinet on
the downflow brackets as shown in Figure 9.
c. Reinstall the center support (if removed) using the
two (2) screws removed in Step 3.
d. Reinstall the coil access panels and reinstall
blower access panel removed in Step 1 as shown
in Figure 10.
Side Drain Pan and Extension Removal Instructions
Refer to Figure 2, remove the two (2) screws that secure
the drip shield support brackets to the condensate
collectors (front and back). Unsnap the side drain pan
from the bottom drain pan using a screwdriver or any small
lever. The side drain pan, drip shield brackets and the drain
pan extension may now be removed. From Figure 2, drain
port labeled (A) is the primary drain for this application and
condensate drain line must be attached to this drain port.
Drain port (a) is for the secondary drain line (if used). When
the side drain pan is removed, the drain port opening in the
access panel must be covered by the accessory drain port
plug (DPK1) as shown in Figure 1.1.
Kit Number
Application
DPK1
All Models
Side Drain Port Plug
Description
Drain Port Plug
DRAIN PORT PLUG KIT
Table 1
SIDE DRAIN PAN
DPK1 DRAIN PLUG
COIL ACCESS PANEL
MAIN DRAIN PAN
Drain Pan
Figure 1.1
Side Drain Pan Removal
Figure 2
6.2 Horizontal Left Installation (Figure 5)
No field modifications are permissible for this application.
Install unit as shown in Figure 5.
Drain port labeled (B) in Figure 2 is the primary drain for
this application and condensate drain line must be attached
to this drain port. Drain port (b) is for the secondary drain
line (if used).
Remove red plugs from side drain pan before connecting
condensate drain pipes. Use removed plug to close drain
ports on vertical drain pan.
6.3 Horizontal Right Installation (Figure 6)
NOTE: For AMST24BU1400** only: If installing a filter,
an external filter must be used when installing the unit
in Horizontal Right. A filter will not fit on the internal
filter rails in these applications.
1. Before inverting the air handler, remove blower
access panel and coil access panel. The coil access
panel and tubing panel may remain screwed together
during this procedure. Remove and retain the seven
(7) screws securing the coil access panel to the
cabinet and the six (6) screws securing the blower
access panel to the cabinet.
2. Slide the coil assembly out from the cabinet. Use the
drain pan to pull the assembly from the cabinet.
NOTE: Do not use manifolds, copper lines, or the
flowrator to pull the coil assembly out. Failure to
do so may result in braze joint damage and leaks.
