SAFARI BSVI - SERVICE MANUAL

HVAC 22 8. FRONT HVAC UNIT The front HVAC unit in vehicle comprises of the fol- lowing parts: i) BLOWER. ii) BLOWER RESISTOR iii) EVAPORATOR COIL AND TXV (THERMAL EXPANSION VALVE) iv) HEATER COIL i) BLOWER:- The Blower is located at the top on the backside of HVAC unit when viewed from inside the vehicle. It acts as a centrifugal pump drawing in air from the center and pushing it out diagonally. The air flows through the evaporator and the heater coil and then to the cabin. The Blower speed is controlled using a blower control module. Blower Motor Specification MAKE HYOSUNG VOLTAGE DC 12.5 V CURRENT 25A 10% MAX RATING TORQUE 0.56 Nm @12.5 V RATING SPEED 3800 ± 300 rpm RATING OUTPUT 313 W MAX AIR FLOW 545 M3/HR CLAMPING TORQUE TBD Nm ii) BLOWER RESISTOR The speed of the blower can be controlled by em- ploying either a Blower resister. The blower resist- er is used in models with manual HVAC. A blower resister used is for a four-speed control of blower speed. This is achieved by having a combina- tion of three different resistances. The blower resist- er is placed in the intake air flow to allow it to dissipate heat freely. CIRCUIT DIAGRAM Resistance Specification: