WD Catalog 2018

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11-5 Go to o - Index
Typical AC Systems and Components
SLEEPER CAB
AC/HEATER
REFRIGERANT
LINES TO SLEEPER
CAB AC UNIT
IN-CAB
AC/HEATER
TEE FITTINGS
COMPRESSOR
REFRIGERANT LINES
TO AND FROM
CONDENSER
Engine intercooler designs often use the space in front of the radiator where an
AC condenser would normally be mounted. A roof mount AC system condenser
may be the solution. In some cases, there is space to install the condenser below
the intercooler. Figure 11-9 illustrates how an AC system design takes advan-
tage of space below the intercooler for condenser installation.
IN CAB
AC SYSTEM
COMPRESSOR
CLUTCH
CONDENSER
DESIGNED
TOMOUNT
BELOW
INTERCOOLER
RECEIVER-DRIER
Please take a few minutes to review all illustrations, cautions and notes in this
manual. If you would like more information about heavy duty vehicle HVAC
system service and repair, check with your supplier. Someone may be holding a
service clinic in your area that you could attend and benefit from.
Your own troubleshooting ability and work speed will increase with experi-
ence. Remember also, the causes for system failure can often be prevented with
a regular system maintenance program.
Figure 11-8
A typical installation sche-
matic that shows component
location when under-dash
and sleeper box systems are
combined. Tee fittings in
both high and low pressure
AC lines carry refrigerant to
and from both evaporators.
The heater system is not
shown.
Figure 11-9
This AC system schematic
shows how components
might be mounted when an
engine intercooler (charge-
air cooling) has been in-
stalled in front of the
radiator. The condenser
used is designed to fit below
the intercooler unit (not
shown).