Operating Instructions - Section 32 10/04 OM3215 Page 32-4 HEATER / AIR CONDITIONER COMPART- MENT AND CONTROLS Heater/air Conditioner Vents The heater/air conditioner compartment contains the heater/air conditioner controls (6, Figure 32-1) and the heater/air conditioner components, such as the blower motor assembly and heater coils. Optimum cab air cli- mate can be selected by using the following controls in various combinations. These heater/air conditioner vents (6, Figure 32-5) may be rotated 360°. Air flow through the vents is controlled by manually opening/closing or turning the louvers.
Defroster Vent Control Switch The defroster control switch (1, Figure 32-5) directs heated air for windshield defrosting. DOWN position of the toggle switch is OFF. The UP position of the toggle switch is ON. Heat Vent Control Switch The heater control (2, Figure 32-5) directs heated air to the cab floor for heating of the cab. The DOWN posi- tion of the toggle switch is OFF. The UP position of the toggle switch is ON. Temperature Control Knob The temperature control knob (3, Figure 32-5) adjusts the outlet air temperature of the heater/air conditioner. Rotating the knob counterclockwise (blue arrow) will select cooler temperatures.
Full counterclockwise posi- tion is the coldest air setting. Rotating the knob clockwise (red arrow) will select warmer temperatures. Full clockwise position is the warmest heater setting. Fan Control Knob The fan control knob (4, Figure 32-5) controls the 3-speed heater/air conditioner internal fan unit. Full counterclockwise is the OFF position. Rotating the knob clockwise selects increasingly higher fan speeds. Selector switch (5, Figure 32-5) allows the operator to select heat A/C, or niether. The left position of the switch activates the air conditioning and the right side of the switch activates the heater. The middle position is OFF.
Niether the heat nor the air conditioning can be activated in this position. Heater/air Conditioner Selector Switch FIGURE 32-5. A/C & HEATER CONTROLS 1. Defroster Control 2. Outside/Inside Air 3. Heater Control 4. Temperature Control 5. Fan Control 6. Selector Switch NOTE : The air conditioner will not operate unless the fan control knob is turned ON.