Issue 9 February 2006
42
4.4 Air Conditioning (Optional)
The Air Conditioning (AC) operates via an engine driven compressor which is equipped with an electro
magnetic engagement clutch.
The air is cooled in an evaporative heat exchanger located behind
the drivers headrest. A circulation fan passes air through the
evaporator and along a roof duct on the right hand roof rail. The air
exits at 2 ducts in this area. The ducts have directional grilles
which can be altered to direct the flow of air. The circulation fan
blends re-circulated air with fresh air.
The excess heat is rejected in a condenser heat exchanger mounted on the outside, front area of the roof.
Electrically operated twin fans circulate cooling air through the condenser.
Prior to switching on the AC, ensure that the Heater Control on the left hand side of the drivers seat is turned
off. The heater air circulation fan will automatically be switched off when the AC is switched on.
The AC is switched on via the AC switch (snowflake symbol) on the right hand
switch column of the cab. It has 2 positions. Use position 1 for normal cooling and
position 2 for boost. The engine must be running. The window and the roof latch
should be closed when the AC is operating to prevent all cooled air from escaping
from the cab and being replaced with hot air from outside. In hot humid conditions
water will condense on the evaporator surface. This water escapes to the outside of the cab via a drain duct.
Water dripping from this duct under the cab is quite normal.
Ensure that the cab window and roof hatch are closed when the AC is switched on.
STOP
