Komatsu 830E-AC Shop Manual page 986

HEATER / AIR CONDITIONER
COMPARTMENT AND CONTROLS
The heater/air conditioner compartment contains
heater/air conditioner controls (6, Figure 5-1) and
some of the heater/air conditioner components, such
as the blower motor assembly and heater coils. Opti-
mum cab air climate can be selected by using the fol-
lowing controls in various combinations.
Fan Control Knob
Knob (1, Figure 5-6) controls the cab air fan motor.
The fan motor is a 3-speed motor: low (setting 1),
medium (setting 2), and high (setting 3). Speeds are
selected by rotating the control knob clockwise to the
desired position. OFF is full counter-clockwise
position (setting 0).
Temperature Control Knob
Knob (2, Figure 5-6) allows the operator to select a
comfortable temperature.
• Rotating the knob counterclockwise (blue arrow)
will select cooler
counterclockwise position is the coldest air
setting.
• Rotating the knob clockwise (red arrow) will
select warmer temperatures. Full clockwise
position is the warmest heater setting.
Directional Control Knob
Knob (3, Figure 5-6) directs heated air to different
areas of the cab.
• The full counterclockwise position directs air to
the floor vents only.
• Turning the knob one position clockwise directs
air to both the floor and dash vents.
• Turning the knob one more position clockwise
directs air to the dash vents only.
• Turning the knob one more position clockwise
directs air to the windshield defrost vents only.
• The full clockwise position directs air to both the
floor and windshield defrost vents.
N5-14
temperatures. Full
Operator Controls
Heater Vents
Each heater/air conditioner vent (4, Figure 5-6) is a
flapper type which may be opened or closed or
rotated 360° for optimum air flow. There are four
(three not shown) across the top of the panel, one
each in the right and left panel modules, and four
below the panel.
FIGURE 5-6. A/C & HEATER CONTROLS
10/06 N05070