Figure 2-3. Controls and instruments (front of unit).

Table 2-1. Controls and Instruments-(Continued)

Reference

Function

Description

Control

designator

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.

control

Indicates liquid line system condition.

Liquid line sight glass approximately

Liquid line

sight

glass

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).