OM3241 Operation - Section 32 Operator Cab and Controls Page 32-9 CAB CLIMATE CONTROL Fan Control Knob Fan control knob (4, Figure 32-8) controls the 3-speed heater/air conditioner internal fan unit. Full counter- clockwise is the off position. Rotating the knob clock- wise selects increasingly higher fan speeds. HEATER/AIR CONDITIONER VENTS The operator has complete control of the air flow in the cab. Heater/air conditioner vents (5, Figure 32-1) are flapper-type vents. The vents may be individually opened or closed, and may be rotated 360° for opti- mum air flow.
There are four (three not shown) across the top of the panel, two in front of the operator (one each in the right and left panel modules), and four below the panel. NOTE: The air conditioner will not operate unless the fan control knob is turned on. Heater/Air Conditioner Vents HEATER/AIR CONDITIONER CONTROLS AND VENTS Heater/air conditioner vents (6, Figure 32-8) may be rotated 360°. Air flow through the vents is controlled by manually opening/closing, or turning the louvers. Heater/air conditioner unit (6, Figure 32-1) contains heater/air conditioner controls and the heater/air con- ditioner components, such as the blower motor and heater coils.
Optimum cab air climate can be selected by using the following controls in various combinations. Defroster Vent Control Switch Defroster vent control switch (1, Figure 32-8) directs heated air to the windshield for defrosting. The down position of the toggle switch is off, and the up position is on. Heat Control Switch Heat control switch (2, Figure 32-8) 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 Temperature control knob (3, Figure 32-8) adjusts the outlet air temperature of the heater/air conditioner.
Rotating the knob counterclockwise (blue arrow) will select cooler temperatures. Full 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. FIGURE 32-8. A/C AND HEATER CONTROLS 1. Defroster Vent Control Switch 2. Heat Control Switch 3. Temperature Control Knob 4. Fan Control Knob 5. Heater/Air Conditioner Selector Switch 6. Heater/Air Conditioner Vents