Layout of Air Conditioning and Heating System
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| Illustration 1 | g06609068 |
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Typical example (1) Monitor (Control panel) (2) Vents (Rear) (3) Refrigerant receiver-dryer (4) Refrigerant condenser (5) Refrigerant compressor (6) Heater supply hose (7) Heater return hose (8) Refrigerant supply hose (High-pressure) (9) Refrigerant return hose (Low-pressure) (10) Drain hose (11) Duct (Floor) (12) Duct (Front) (13) Vent (Front) (14) Heater/Air conditioner unit (15) Defrost vent (16) HVAC ECM | |
Air Conditioner and Heater Unit
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| Illustration 2 | g06238493 |
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(1) Motor assembly (Air outlet)
(2) Motor assembly (Air blend) (3) Wiring harness (4) Fan control (5) Relays (Refrigerant compressor and Blower motor) (6) Blower motor (7) Sensor (Recirculated air) (8) Motor assembly (Air inlet) (9) Filter (10) Expansion Valve (11) Heater core (12) Evaporator Coil Assembly (13) Sensor (Evaporator) | |
Note: Water temperature and ambient air temperature data is now provided by the Machine ECM.
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| Illustration 3 | g06237157 |
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(A) Air inlet (Fresh air)
(B) Air inlet (Recirculated air) (C) Air outlet (Floor) (D) Air outlet (E) Air outlet (Rear) (1) Evaporator coil (2) Blower motor (3) Motor assembly (Air inlet) (4) Filter (5) Motor assembly (Air blend) (6) Heater core (7) Motor assembly (Air outlet) | |
Routing of Refrigerant Hoses and Coolant Hoses
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| Illustration 4 | g06609328 |
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Typical example (1) Engine (2) Refrigerant compressor (3) Condenser (4) Refrigerant supply hose (High-pressure) (5) Refrigerant receiver-dryer (6) Refrigerant return hose (Low-pressure) (7) Air conditioning and heating unit (8) HVAC ECM (9) Heater return hose (10) Heater supply hose | |
Air Conditioning and Heating Control
Consult with your Cat dealer for periodic maintenance of the heating and air conditioning system.
Air conditioning and heating functions are controlled through the monitor.
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| Illustration 5 | g06609341 |
Basic air conditioning and heating controls are displayed on the home screen.
To navigate to the air conditioner screen from the main screen, press application menu icon (1).
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| Illustration 6 | g06609342 |
Access the air conditioning controls by touching "Air Conditioner" on the screen.
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| Illustration 7 | g06609346 |
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Air conditioning and heating screen (2) Temperature control (3) Fan blower speed control (4) Air outlet settings (5) Recirculation (6) Auto (7) Defrost (8) Air conditioning (9) On/Off | |
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| Illustration 8 | g06609356 |
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Air outlet control (10) Front vents (11) Front and rear vents (12) Front, floor, and rear vents (13) Floor vents (14) Defrost mode | |
Application menu (1) - Use this icon to return to the application menu.
Temperature control (2) - The temperature control is used to raise or lower the desired temperature.
Fan blower speed control (3) - The blower control is used to increase or decrease the desired blower speed.
Air outlet settings (4) - The desired air outlet setting can be chosen from this panel. The indicator light will illuminate to show the active setting.
Recirculation (5) - This option recirculates air from the cab instead of pulling air from the outside. This mode is more efficient because the system is recycling conditioned air from the cab. However, no fresh air is coming into the cab when in this mode. The indicator light will illuminate when this mode is active.
Auto (6) - Select this option to hold the system at the desired temperature. The system will modulate to keep the cab at the temperature that the system is set to. The indicator light will illuminate when this mode is active.
Defrost (7) - Pressing this button activates and deactivates the defroster. Use the defroster to remove steam and frost from the windows. The indicator light will illuminate when this mode is active.
Air conditioning (8) - Pressing this button activates and deactivates the air conditioner. The indicator light will illuminate when this mode is active.
On/Off (9) - Turns the air conditioning and heating system on and off. The indicator light on the icon will turn green when the power is on.
Front vents (10) - In this mode, air will only circulate from the front vents.
Front and rear vents (11) - In this mode, air will circulate from the front vents and rear vents.
Front, floor, and rear vents (12) - In this mode, air will circulate from the front vents, rear vents, and floor vents.
Floor vents (13) - In this mode, air will only circulate from the floor vents.
Defrost mode (14) - In defrost mode, air will circulate from the defrost vents and floor vents.
- To operate the system, press on/off icon (9).
- Use temperature control (2) to adjust to the desired temperature.
- Select the desired mode and outlet vents.
- Use fan blower speed control (3) to adjust the blower. If the system is in "Auto" mode, the blower will automatically be adjusted.
Show/hide table
Illustration 9 g06609392 (A) Defrost vents
(B) Floor air vents
(C) Rear air vents
(D) Front air vent - Redirect the louvers for air outlets (A), (C), and (D) by hand to the desired direction. The louvers for floor vents (B) cannot be redirected.
