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1960 Chrysler Vaccum Controlled Heather System
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wizard
Posted 2011-05-02 9:04 AM (#270750)
Subject: 1960 Chrysler Vaccum Controlled Heather System



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Location: Southern Sweden - Sturkö island		I have often wondered about how the system works and how the vacuum tubes shall be connected. I finally found the time to investigate it. Hope this will be helpful for someone.

Chrysler 1960Vacuum Controlled Heater System

The heater system consists of a heater core which is connected to the engine through a heater temperature control valve with a probe that regulates the heat accordingly to the position of the valve and the temperature of the air in the duct. A two speed fan feeds the heated air through a heater duct, which leads the air to the defroster nozzles or to the floor, depending on the positions of the heater duct doors.
For the comfort of the driver, the heater is controlled by a temperature lever and pushbuttons that controls the system.

The push buttons and their functions are;

“OFF” Closes the “Heater Distributor Duct”, as well as the “Fresh Air Door”. The fan is inoperative in this position.
(The Heater Distributor Duct Actuator is pulled in for to close the door, the Heater Distributor Duct Defroster Actuator is pulled in for floor air position
and the Fresh Air Door Actuator is pulled in for to close the door.)
There is no air circulation in the car.

“LO” Opens the “Heater Distributor Duct” and starts the fan in low speed.
(The Heater Distributor Duct Actuator is pushed out for to open the door, the Heater Distributor Duct Defroster Actuator is pulled in for floor air
position, so that the fan can feed hot air directed towards the floor. The Fresh Air Door Actuator is pulled in for to close the door.)
Fresh air enters through cowl intake and passes the heater core for to be heated up and the fan blows it into the car.

“HI” Opens the “Heater Distributor Duct” and starts the fan in high speed.
(The Heater Distributor Duct Actuator is pushed out for to open the door, the Heater Distributor Duct Defroster Actuator is pulled in for floor air
position, so that the fan can feed hot air directed towards the floor. The Fresh Air Door Actuator is pulled in for to close the door.)
Fresh air enters through cowl intake and passes the heater core for to be heated up and the fan blows it into the car.

“DEF” Opens the “Heater Distributor Duct” and starts the fan in high speed.
(The Heater Distributor Duct Actuator is pushed out for to open the door, the Heater Distributor Duct Defroster Actuator is pushed out for defroster
air position, so that the fan can feed hot air directed towards the windshield. The Fresh Air Door Actuator is pulled in for to close the door.)
Fresh air enters through cowl intake and passes the heater core for to be heated up and the fan blows it over the inside of the windshield.

“AIR” Closes the “Heater Distributor Duct” and opens the “Fresh Air Door”. The fan is inoperative in this position.
(The Heater Distributor Duct Actuator is pulled in for to close the door, the Heater Distributor Duct Defroster Actuator is pulled in for floor air position
and the Fresh Air Door Actuator is pushed out for to open the door.)
Fresh air enters through the cowl intake and is lead directly to the floor.

Red marked vacuum tubes are always connected to the actuator arm side of the vacuum pot and white marked are connected to the rear of the pot.

Edited by wizard 2011-05-02 9:22 AM




(Resize of Vacuum_Tube_Connector_1.jpg)



(Resize of Pushbuttons_heat1.jpg)



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Attachments Resize of Vacuum_Tube_Connector_1.jpg (86KB - 172 downloads)
Attachments Resize of Pushbuttons_heat1.jpg (37KB - 158 downloads)
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njlimbaugh
Posted 2011-05-02 9:48 AM (#270753 - in reply to #270750)
Subject: Re: 1960 Chrysler Vaccum Controlled Heather System


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Location: N. Georgia		Funny you should mention this right now. I just traced another vacuum leak to the same unit on my 61 Fury. Since it was junk anyway, I took my plastic unit apart to see what makes it tick internally. Talk about monkey-motion! There is a set of slides, operated by the pushbuttons that move a slide valve to route vacuum to the various actuators. Also, a couple of electric switches move in and out of play depending on what mode you're switching to. On my unit, the slide switch had worn to where vacuum leaks no matter what mode you're in. I wonder how many engineers at Chrysler stayed awake for weeks in a row thinking up this monstrosity. Since there's no way to rebuild this turd, the hunt's on for a NOS unit that still works!
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imopar380
Posted 2011-05-02 7:06 PM (#270852 - in reply to #270750)
Subject: Re: 1960 Chrysler Vaccum Controlled Heather System



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Location: Victoria, BC, on Vancouver Island, Canada		Sven, thanks for posting this. As a side note, how does the temperature control lever / temp control valve control the air temperature?
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wizard
Posted 2011-05-03 2:20 AM (#270901 - in reply to #270750)
Subject: Re: 1960 Chrysler Vaccum Controlled Heather System



Board Moderator & Exner Expert 10K+

Posts: 13050
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Location: Southern Sweden - Sturkö island		Sure Ian, heres a short description - hope that it helps:

Heater Temperature Control Valve.
The Heater Temperature Control Valve is one of the main components of the heater system. The task of the valve is to regulate the supply of heated coolant to the heater core. The supply is regulated in two ways, partly manually with the temperature control lever and partly automatically by means of a thermostatic device.
The principal assembly of the heater control valve is shown in the figure.
When the temperature lever on the heat control is pulled towards the right, (upwards in the figure) the valve opens and the supply of heated coolant to the heater core starts. The air passes the heater core and is thereby heated up for to be feed through the duct with the various doors. The thermostat probe is mounted in the duct in the air flow. When the passing air reaches a certain temperature, the mixture of volatile liquids in the probe begins to evaporate. This gives rise to a pressure increase that leads to an expansion of the thermostat in the heater control valve. Such an expansion in the thermostat results in that the valve closes slightly and decreases the flow of the heated coolant through the heater core. The result will be a decrease in temperature of the air flow, the mixture of volatile liquids in the probe will contract and the thermostat will open the valve again.
A constantly repeating of the sequence described above, gives the desired result, namely that the temperature of the inflowing air in the vehicle to stay constant at the set and desired level.

1. Thermostat
2. Lever for heat control
3. Valve


Edited by wizard 2011-05-03 2:21 AM




(valve.jpg)



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Attachments valve.jpg (24KB - 156 downloads)
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imopar380
Posted 2011-05-12 11:52 PM (#272260 - in reply to #270750)
Subject: Re: 1960 Chrysler Vaccum Controlled Heather System



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Posts: 7207
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Location: Victoria, BC, on Vancouver Island, Canada		Thanks Sven, tonight my heater won't give any hot air, was working fine 4 days ago when I last had the car out.
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