7
NOTE: The DPIH insulation kit is not supplied with this product
and should be purchased separately. See the following chart for
the correct DPIH kit.
The following describes converting to “Horizontal Left-Hand.”
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.
Horizontal Left-Hand Conversion
1. Remove the 3 air handler access panels.
2. Remove the “J” shaped bracket that retains the evaporator
coil.
3. Remove the flowrator from the lower left side access panel
and slide out the evaporator coil and horizontal drain pan.
4. Remove the gasket from the horizontal pan drain
connections.
5. Remove the oval shaped plastic plug from the left side
access panel.
6. Remove the oval shaped rubber gasket seal from the lower
right side access panel.
7. The drain connections for the horizontal pan are sealed with a
thin coating of plastic. Knock out this plastic seal with a
screwdriver and hammer.
NOTE: The upper drain will become the secondary drain
which is mandatory in many municipalities.
8. Install the plastic plug removed in Step 5 to the right side
lower access panel and the oval shaped rubber gasket to the
lower left access panel.
9. Reinstall the evaporator coil with the horizontal panel on the
left side.
NOTE: Push the assembly completely to the rear to ensure
the engagement of the upflow pan with the rear channel
bracket.
10. Install the “J” bracket removed in Step 2 to support the
upflow pan to the tie channel.
11. Attach all panels and the metering device.
Achieving 2% Low Leakage Rate
Ensure that the Neoprene gasket with PSA remains intact on all
surfaces that the access panels are secured to. These surfaces
are the entire length of the wrapper and areas between the upper
tie plate, upper and lower access panels. Check that the upper
access panel breaker insert gasket is intact and that the flowrator
gasket is installed on the lower access panel. An additional drain
hole cover is required.
Install Condensate Drain
The air handler is provided with
³⁄₄
" (1.9 cm) NPT condensate
drain connections.
A field-fabricated secondary drain pan, with a drainpipe to the
outside of the building, is required in all installations over a
finished living space or in any area that may be damaged by
overflow from the main drain pan. In some localities, local codes
may require a secondary drain pan for any horizontal installation.
Make sure the air handler is level so that the drain pan will empty
completely.
1. Remove the appropriate drain knockouts. See “Installation
Configurations.” You may need to remove the indoor coil
assembly from the cabinet.
2. Remove any web from inside any threaded drain pan hole to
which a drain line is to be connected. Gently remove the web
so as not to damage the coil.
3. Connect the primary drain line connection to the primary
drain pan connection. The primary drain connection is flush
with the bottom of the inside of the pan. The secondary
connection is raised above the bottom of the inside of the
pan.
NOTE: When making drain fitting connections to the drain
pan, hand tighten. Using a sealant is recommended.
Overtightening the fittings can split connections on the drain
pan.
4. Secondary drain connections, if used, should be connected
to a separate drainage system. Run the secondary drain line
to a place where the occupant would notice water coming
from the secondary drain.
5. Install a 3" (7.6 cm) trap in both the primary and secondary
drain lines as close to the unit as practical. Make sure the top
of the trap is below the connection to the drain pan to allow
complete drainage of the pan.
NOTE: Horizontal runs must also have an anti-siphon air vent
(standpipe) installed ahead of the horizontal run. See “Typical
Condensate Drain Connection” in this section. An extremely
long horizontal run may require an oversized drain line to
eliminate the trapping of air.
WVAHM or WAHMS Model
Insulation Kit
1824
DPI18-32
3030/1931/3636
DPI36-42
3642/3743/4860/4961
DPI48-61
A. DPIH kit
B. Secondary drain
C. Primary drain
A B C
Goodman 2
If secondary drain is not installed, the secondary access
must be plugged.
CAUTION
