SECT HEATER ANC CONTENTS Direct Air Heater All Weather Air Conditioning DIRECT A u Page General Description lg 1 Heater Odors 15 1 Controls 15 5 Service Operations 15 1 Blower and Housing lb 1 Air Inlet Assembly 15 5 GENERAL The 1965 Corvair Direct Air Heater utilizing the engiae heat rejection principle is a refinement of the direct air heater used in past years Extremely fast and even heating is provided through heater outlets in the front and rear seat areas The system also includes defroster outlets at the windshield In operation this system makes use of the engine cooling air normally ducted out the rear of the engine after performing its cooling function This air is instead routed through two flexible hoses and into the heater inlet assembly This assembly contains deflector doors necessary for temperature control and for shutting off the air flow to the passenger compartment when desired The heated air is mixed in the air inlet assembly with cooler air drawn through a single flexible hose from the upper engine shroud The cooler or tempering air will maintain a temperature of about 110 F during normal vehicle operation while the heated air entering the inlet case may reach 160 F The air thus tempered now flows through a flexible hose to the rear duct assembly andthrough this duct to the front duct and valve assembly The position of the SERVICE C BLOWER AND HOUSING Removal 1 From beneath the vehicle remove the large diameter heated air lose from the right side of the air inlet assembly 2 Remove the blower motor wire at the connector 3 Remove the blower mounting plate screws attaching the blower to the blower housing 4 Work the motor and mounting plate down and out of the housing 5 If it is necessary to remove the blower housing proceed as follows ION 15 1 ACCESSORIES F THIS SECTION Page 15 1 System 15 7 11R HEATER VDEX Page Heater Hoses 15 5 Rear Duct Assembly 15 5 Air Ducts 15 5 Heater Resistor 15 5 Control Cable 15 6 DESCRIPTION diverter door in the valve assembly determines whether the air flow will enter the front compartment at this point or will continue on through the defroster ducts for defroster operation Figures 1 and 2 illustrates the air flow through the various components of the system Heater Odors Because of the inherent characteristics of the heater objectionable fumes in the engine compartment may be drawn into the passenger compartment and result in owner complaints These complaints can be reduced in number by cautioning the owner on the importance of maintaining a clean engine Oil spilled or dripped on the engine shrouding may result in some passenger discomfort and care should be taken to see that such drips and spills are thoroughly cleaned up immediately However complaints of objectionable odors in the passenger compartment whether the heater is on or off should be traced immediately and promptly corrected Procedures and possible locations to check for faulty engine gaskets or seals are covered under Maintenance and Adjustments of Section 6 PERATIONS Remove the two screws attaching the blower outlet adapter to the blower and if clearance is still needed remove the adapter to rear duct assembly hose at the rear duct assembly and take the hose and adapter as a unit from the car 6 Reach up into the blower housing and remove the housing to inlet assembly attaching screws and remove the housing Installation 1 Remove the blower drum from the old blower motor and replace on a new motor 2 Replace the blower housing if it was previously removed