Operation - Section 32 OM3223 Page 32-4 Operator Cab and Controls HEATER / AIR CONDITIONER COMPARTMENT AND CONTROLS Heater / Air Conditioner Selector Switch Selector switch (5, Figure 32-5) allows the operator to select heat or air conditioning, or neither. The left position of the switch activates the air conditioning and the right side of the switch activates the heater. Neither the heat nor the air conditioning can be acti- vated in this position. The heater/air conditioner compartment contains 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 climate can be selected by using the following controls in various combinations. Heater / Air Conditioner Vents 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 Defroster control switch (1, Figure 32-5) directs heated air for windshield defrosting. The down posi- tion of the toggle switch is off. The up position of the toggle switch is on. Heat Control Switch Outside/inside air control switch (2, Figure 32-5) allows either outside or inside air to be circulated through the cab heater assembly.
Moving the switch up directs outside air to be circu- lated through the heater assembly and through the cab. Moving the switch down directs inside air to be recir- culated through the heater assembly. Temperature Control Knob Temperature control knob (3, Figure 32-5) is pro- vided for the operator to select a comfortable temper- ature. Rotating the knob counter-clockwise (blue arrow) will select cooler temperatures. Full counter-clockwise position 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 Fan control knob (4, Figure 32-5) is provided to con- trol the cab air fan motor. The fan motor is a three- speed motor (low, medium and high). Speeds are selected by rotating the control knob clockwise to the desired position. The OFF position is full counter- clockwise position. FIGURE 32-5. A/C HEATER CONTROLS 1.Defroster Control 2.Outside/Inside Air 3.Temperature Control 4.Fan Control Knob 5.Selector Switch 6.Vents