Figure 2-1 Template For Em-1 And Em-2 (Gen 4); Table 2-1 Gen 4 Evaporators; Table 2-2 Gen 5 Evaporators; Rear Mounted Evaporators - Carrier Transport Air Conditioning Installation Procedures Manual

2.2 REAR MOUNTED EVAPORATORS

2.2.1 GEN 4/5 Series EM-1, EM-2, EM-3, EM-7,
EM-6, & EM-14
To install the evaporator assembly in the rear of a bus
utilize the following installation procedures:
a Un-pack the evaporator and check for any obvious
damage (Refer to Sec. 1.8).
b Check the interior of the bus/vehicle to make sure
the evaporator(s) can be safely and properly installed in
the selected area. Refer to Table 2-1 or Table 2-2 for
evaporator dimensions.

Table 2-1 GEN 4 EVAPORATORS

Evaporator A (width)
EM-1 41.12inch
EM-2 41.12 inch
EM-3 59.44 inch
EM-6 25.63 inch
EM-14 36.13 inch

Table 2-2 GEN 5 EVAPORATORS

Evaporator A (width)
EM-1 41.25inch
EM-2 33.95 inch
EM-3 59.44 inch
EM-7 26.64 inch
NOTE
Except for the EM-3, all the evaporators listed in
paragraph 2.2.1 can also be mounted in the
front and/or on either side of the vehicle.
NOTE
In some cases it may be necessary to relocate
the ceiling lights and/or speakers.
Evaporator Mounting Holes
Drain Line
Location
T--311
B (height) C (depth)
9.88 inch 22.25 inch
9.88 inch 22.25 inch
10.75 inch 22.75 inch
9.88 inch 22.25 inch
7.00 inch 19.91 inch
B (height) C (depth)
7.62 inch 19.13 inch
7.62 inch 19.13 inch
7.62 inch 19.13 inch
7.62 inch 19.13 inch
Center of Bus Ceiling
Center of
Template
Cardboard
EM-1/2 Template

Figure 2-1 Template For EM-1 And EM-2 (GEN 4)

c Plan refrigerant hose, drain lines, and electrical
harness routing. Some small bus applications will allow
routing inside the walls and back panel. If this is the case
it is better to route your hose, drain lines, and electrical
harnesses before mounting the evaporator. Refer to
Section 4 for detailed instructions regarding hose,
harness, and drain-line routing.
d Locate and review installation instructions supplied
with the evaporator assembly. Review piping and wiring
diagrams for proper hose and fitting size, and the
correct wiring harness. Refer to Section 4 for detailed
instructions regarding hose and harness routing.
e For ease of installation, trace evaporator tray unto
cardboard or other thin material. Refer to the installation
drawing for the dimension the evaporator assembly has
to be from the back wall. Refer to Table 2-3 or Table 2-4
for these dimensions if the installation drawing is not
available. Example: For an EM-1 GEN 4, this dimension
is 7 Inches. Without this added dimension the return air
grill will not fit on to the evaporator cover. The GEN 5
series of evaporators mounts directly against the rear
wall.
An optional rear panel is available for all the
Gen 5 evaporator assemblies. This panel is
used when the rear wall is curved and the evap-
orator cover cannot fit flat against the rear wall.
This panel can be trimmed to compensate for
the ceiling curve. Contact the Carrier Transport
Air Conditioning Technical Service Hot Line
(1--800-450-2211) for assistance in obtaining
these panels.
f Mark and drill all mounting holes and cut out
template. See Figure 2-1.
g Mark center of template in order to match center of
bus ceiling. See Figure 2-1.
Evaporator Mounting Holes
Drain Line
Location
2--2
NOTE
Back Wall
of Bus
Change 07/09