Mk II Air Conditioner
Mk II Air ConditionerCONTROLS
The air conditioning heating system fitted to is a climatic control type using two manual controls. One selects the desired temperature; the other selects mode of operation.
AUTOMATIC TEMPERATURE CONTROL
The system can automatically maintain any temperature selected at the temperature selector (65°F - 85°F) by comparing the car's interior temperature with that selected at the manual selector. The difference in temperature at these two points produces an electronic signal which, through an amplifier to a motor driven camshaft, operates various relays, microswitches, vacuum switches, linkage and flaps programing the unit to automatically cause hot or cold air to flow to the car's interior, depending upon the temperature selector setting. The camshaft servo motor can be driven in either direction. The air temperature entering the interior may be hot or cold or an infinitely variable mixture of the two.
AIR FLOW
The air is introduced into the interior by two four-speed fans and fed through a series of blending flaps which direct it to the evaporator and/or heater cores and then into tile car interior. If quick or slow air distribution of heating or cooling is desired, the automatic fan speed functions can be overridden to provide high or low fan speed.
The low speed fan operates in Auto and LO positions automatically; however, if high or low speed fan is selected, all other functions still remain automatic.
Air into the car's interior is available at both front and rear footwells - center dash face level outlets - end of dash face level outlets and screen outlets, depending upon mode of operation selected. The dash panel outlets are controllable for quantity and direction of air distribution.
DEFROST
Defrost may also be selected in which case the automatic sensing system is overridden and all air is emitted at high fan speed at the screen outlets with a small bleed to the footwells. Manual operation of the end of dash panel outlets for side window demisting is optional.
ADVANTAGES
As temperature output is controlled by mixing air of different, temperatures rather than controlling the flow of Freon through the evaporator, some difference in temperature is possible between upper and lower outlets, depending upon the position of the flaps. This air bleeding gives a more rapid response to manual control changes and finer selected temperature control. All air, whether heating or cooling is selected, is passed through the evaporator and dehumidified.
MAXIMUM AIR FLOW
The air flow from the unit is 230 cu.ft./min. on heating, 300 cu.ft./min. on cooling. By comparison,, the Jaguar Mark I air flow was 200 cu.ft./min for both cooling and heating.
COOLING AND HEATING CAPACITY
Cooling capacity of the Mark II is 27300 BthUs/hour, heating 13500 BthUs/hour; whereas the Mark I was 17900 BthUs/hour cooling, 11700 BthUs/hour heating.