System - Porsche 928 1982 Owner's Manual

Climate control system
Your Porsche factory installed climate control
system combines ventilation, heating, de-
frosting/defogging and air conditioning for
year-round driving comfort.
Fresh air ventilation can be obtained by turn-
ing the ignition key to position " 2 " and by se-
lecting a fan speed.
The heater works only when the engine is run-
ning. Maximum heating output is achieved
when the engine has reached operating tem-
perature.
The air conditioner works only when the en-
gine is running. The higher the engine rpm,
the more intensive the cooling effect. Air tem-
perature is kept constant by a thermostatic
sensor located between the cooling fins of the
evaporator. Air from inside the car is drawn
through the evaporator for cooling and then
reenters the car interior through the air outlets.
The air conditioner compressor is activated
automatically, when the "program" control le-
ver is moved to the following positions:
With an activated compressor, the engine runs
at increased idle speed.
Operating hints
To obtain maximum cooling, move tempera-
ture control lever to the extreme left and turn
the fan control knob to speed 4. With air distri-
bution lever in position AUTO cool air will flow
from open side window/center air vents, as
well as from footwell and glove compartment
nozzles.
During periods of high humidity and low tem-
peratures, the air conditioner can be switched
on together with the heating system. Move
both temperature and air distribution levers to
desired settings and turn fan control knob to
speed 2 or 3. These adjustments will provide
pleasant mixture of cool/warm air circulation.
The air will be dehumidified to prevent windows
from fogging.
The air conditioner should be switched on
briefly at least twice a month. Periodic opera-
tion of the air conditioner is necessary to lubri-
cate the crankshaft seals and the expansion
valve. This is especially important during the
cold season when the air conditioner is not
used.
Caution: Should uncooled air flow from
the air outlets, switch the system off.
Further operation could lead to compres-
sor damage. Have your Porsche dealer
locate and correct the problem. He has
qualified personnel and the necessary
equipment.
Maintenance
The condenser should be checked period-
ically for cleanliness. If clogged with dirt or
insects, the condenser should be washed
down with water. After the winter months
before extended summer usage, the air
conditioner should be checked and, if ne-
cessary, serviced.
Payload reduction
The weight of the air conditioner installation
reduces the vehicle's capacity weight. For
weight information see sticker on left door
sill.
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