Step 4-Unit Installation; Ground Level Installation; Rooftop Installation -- Curb Mounting; Covert Horizontal Airflow To Down Airflow - Trane 18-EB24D1-19 Installer's Manual

Step 4—Unit Installation
NOTE: The factory ships this unit for horizontal installation.

Ground Level Installation

To install the unit at ground level:
1. Place the unit on a pad the size of the unit or larger. The unit
must be mounted level for proper drainage of water through
the holes in the base pan. To attach the unit securely to the
slab, use extreme mounting kit, BAYEXMK003A.
The pad must not come in contact with the structure (see Fig-
ure 13.) Be sure the outdoor portion of the supply and return
air ducts are as short as possible.
Unit requires vibration support as indicated in Figure 13 below
and in Figure 15 on page 19.
2. Location of the unit must allow service clearance around it.
Clearance of the unit must be given careful consideration.
See Figures 1 to 12, pages 4-15.
NOTE: Any reduction of the unit clearances indicated in these
illustrations may result in condenser coil starvation or the
recirculation of warm condenser air. Actual clearances, which
appear to be inadequate should be reviewed with a local engi-
neer.
IMPORTANT: A minimum 0" clearance to combustible mate-
rial shall be maintained on air outlet duct.
3. Attach the supply and return air ducts to the unit as explained
in the following Ductwork Installation section on page 22.
4. Flexible duct connectors must be of a flame retardant mate-
rial. Insulate any ductwork outside of the structure with at least
two (2) inches of insulation and weatherproof. There must be
a weather proof seal where the duct enters the structure.
5. Do not expose the unit to direct roof water runoff.
6. Seal all holes through exterior walls in accordance with local
codes.
7. Continue with the following installation sections to complete
the installation: Ductwork on page 22, Filter on page 22, and
Electrical Wiring on page 23.
SIDING
EXTERIOR
WALL
SUP-
RETURN
PLY AIR
AIR
DUCT
DUCT
INSULATE WEATH-
ERPROOF OR RAIN
FLEXIBLE DUCT
SHIELD
CONNECTORS
Figure 13. Typical Ground Level Applications
Installer's Guide

Rooftop Installation -- Curb Mounting

Convert Horizontal Airflow to Down Airflow
The factory ships the unit for horizontal airflow. Perform this
procedure to convert it to down airflow:
1. Remove the three (3) sheet metal screws securing the supply
air cover and the four (4) sheet metal screws securing the return
air cover from the base of the unit. Remove the covers from the
base. See Figure 14, page 18.
2. Place the covers over the horizontal supply and return open-
ings (painted side out). Align the screw holes, and secure using
the same screws removed in step 1.

Install Full Perimeter Roof Mounting Curb

1. Verify that the roof mounting curb is correct for the unit. There
are two Installer's Guides depending on the cabinet sizes:
•
2/4WC*3018 through 2/4WC*3036 use model BAYCURB050A.
• 2/4WC*3042 through 2/4WC*3060 use model BAYCURB051A.
2. Assemble and install the curb following the instructions in the
appropriate Installer's Guide.
OUTDOOR AIR DIS-
CHARGE
SUPPORT PAD FOUNDA-
TION
3/4" VIBRATION ISOLATORS, USE 7 ISOLATORS
AS SHOWN IN FIGURE 15, PAGE 19.
Note: Use the extreme mount-
ing kit, BAYEXMK003AA, to
secure the unit to the slab.
Page 17