S-SERIES AIR CONDITIONING -- HEATER SYSTEMCOMPONENTSHeater CoreThe heater core, constructed of ribbon fins (Figure 5), ismounted in the unit housing. Engine coolant is circulatedthrough the core and heat from the coolant is dissipatedby air circulated through the core fins.Hot Water Flow Control ValveThe hot water flow control valve (heater shutoff) isattached to the floor of the blend-air unit housing. It isplaced in the heater core inlet hose and serves to meterthe flow of hot engine coolant through the core. The flowcontrol is accomplished by an adjustable link connectingthe valve to the blend-air door which is controlled by acable connected to the control panel HTR lever.BlowerThe blower fan (Figure 6) provides air circulation throughthe heater and delivers the treated air to the cab interior.Figure 5. - Heater (Only) Unit Heater Core - Exploded ViewCTS-4066APage 5
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