21 AIRCONDITIONING Removal and Fitment of A.C. Components 1. HVAC Assembly REMOVAL: To replace the HVAC unit in cabin compartment following sequence to be followed. Fig. 24 - 26. Note: For removal of dashboard refer body group. 1. Discharge the refrigerant with proper equipment. 2. Disconnect the inlet & outlet pipes in the engine compartment from drauma of cooling coil. Put proper plug on the drauma and pipes opening. 3. Remove the hoses at the heater inlet and outlet end, in the engine compartment. 4. Put proper plug at the heater inlet and outlet ends to avoid any leakages of coolant. 5. Disconnect the electrical connection for blower motor, blower resistor, control panel etc. and remove all the connectors of wiring harness from the HVAC unit. 6. Remove heater & face mode control cable. 7. Remove the fasteners from the mounting points of HVAC unit and remove the unit from the vehicle. Also remove the drain hoses. FITMENT 1. Replace HVAC unit with new one and assemble it with blower assembly with proper fasteners. 2. Fit the HVAC with drain hoses at the positions on the firewall and tighten the fasteners at specified positions. 3. Check and ensure that all connectors of the vehicle wiring harness are fitted with HVAC unit. 4. Fit the control cable for face mode and heater control with the HVAC unit and control panel. Check for the proper functioning of heater and foot-face mode controls. 5. Connect the refrigerant pipes to the daruma on the firewall. Make sure that O-rings are intact and properly seated in their grooves. Apply few drops of ND8 compressor Oil on O-rings before fitment. 6. Remove the plugs from the heater inlet and outlet ends. 7. Connect the hoses to the heater inlet and outlet ends. 8. Check the systems for leakages and charge the systems with charge quantity of 980±20 gms. Fig. 24 Fig. 25 Fig. 26
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