Table 2-1. Controls and Instruments-(Continued)
Provides for controlling the flow and direction
Lever attached to hinged louvers on
Intake air grille damper
of return air to the air conditioner.
the intake air grille.
Indicates liquid line system condition.
Liquid line sight glass approximately
Moisture in the system is indicated by the
1.25 inches in diameter.
center button changing from green (dry) to
yellow (wet). A shortage of refrigerant is
indicated by bubbles in the sight glass (in
cooling mode only).
Figure 2-3. Controls and instruments (front of unit).