Carrier Transport Air Conditioning Installation Procedures Manual page 4

Do not attempt to modify the EM-3 evaporator top panel. Modifications to the top panel could struc-
turally weaken the evaporator assembly, causing system failures and/or injuries to passengers.
Do not use a nitrogen cylinder without a pressure regulator
Never use air for leak testing. It has been determined that pressurized, air-rich mixtures of refriger-
ants and air can undergo combustion when exposed to an ignition source.
When installing a GEN-5 evaporator assembly, never push against the blower wheel. It can easily be
knocked out of balance. Hold unit up to the ceiling with the evaporator framing, not the blower wheel.
Failure to seal these noise abatement headliners (perforated) will allow dissipation of the air and
marginal cooling.
Use of substitute hardware or failure to follow the installation instructions may result in structural
fatigue and/or breakage.
When installing any GEN 5 Evaporator assembly, be very careful not to push against the blower
wheel (s). The blower wheel can easily be distorted and will have to be replaced.
When selecting a location for installing the evaporator it is highly recommended that two roof bows
are used to secure the mounting rails.
When installing any IW unit, be careful not to cut the bus structure rails or wiring harnesses.
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SPECIFIC WARNINGS AND CAUTIONS
WARNING
WARNING
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Safety --ii