WD Catalog 2018

4-16

Chapter 4

– Air Conditioner Components

Figure 4-13 shows both evaporator blower and condenser fan assemblies in a

roof mounted air conditioner. An outer cover directs the flow of outside air

through the condenser. The fan blows the air out through an opening in the top

of the cover. The blower assembly pulls air from the cab, through the evapora-

tor coil and back into the cab. An inner cover encloses the evaporator and

blower assembly to control cab air flow.

Figure 4-13

In this roof top air condi-

tioning system the fan and

blower assemblies pull air

through the condenser and

evaporator.

Air Conditioner System Ducts

In Figure 4-13 above, outer and inner component covers are shown. When

fastened in position, they control air flow direction. AC system ducts come in

different shapes and sizes to fit space requirements. The positions of doors and

louvers control air movement and flow in the cab. Figure 4-14 shows a

combination HVAC blend air duct system. The doors in a duct system could be

controlled by cable, vacuum, compressed air, electric, or by a combination of

these controls. Some function automatically, while others are controlled by the

operator.

INNER COVER ENCLOSES

EVAPORATOR AND

BLOWER ASSEMBLY

OUTER COVER PROTECTS SYSTEM

AND DIRECTS RAM AIR THROUGH CONDENSER