Figure 2-21 Em-3 Installation Diagram; Em-3 Evaporator Gen 4 Or Gen 5 - Carrier Transport Air Conditioning Installation Procedures Manual

2.2.3 EM-3 EVAPORATOR GEN 4 OR GEN 5

To install the EM-3 utilize the installation procedures
outlined in Paragraph 2.2 except as noted below. See
Figure 2-21 for a typical EM-3 installation drawing.
NOTE
Threaded rod (3/8-16) is supplied with the EM-3
instead of 4 inch carriage bolts. Depending on
the contour of the bus roof the distance from the
ceiling to the evaporator could be up to 10 inch-
es (Installer purchased 3/8-16 carriage bolts
can be substituted for the threaded rod).
NOTE
Most EM-3 installations will require the addition
of spacers between the ceiling roof and the
evaporator assembly
Figure 2-21). These spacers will help keep the
4
Apply Sealant
1. 3/8 Flat Washer
2. 3/8-16 Hex Nut, Locking
T--311
(See Detail A,
2
3
1
1
2

Figure 2-21 EM-3 Installation Diagram

2--8
bus roof and/or evaporator from distorting when
tightening the lock nuts.
Do not attempt to modify the EM-3 evapora-
tor top panel. Modifications to the top panel
could structurally weaken the evaporator
assembly, causing system failures and/or
injuries to passengers.
Any refrigerant hose and/or electrical harness
that was routed behind the evaporator assem-
bly must be secured to the back wall or ceiling
with insulated clamps.
Wood
Spacers
3.75 IN. To Rear Wall
3. 3/8-16 Threaded Rod (Cut To Length)
4. Mounting Bar
WARNING
NOTE
A
Corner Of unit Should
JustContact Bus
Ceiling
Side Of Bus