13
THE CONDENSER TUMBLE DRYING PROCESS
The drying process is by means of a closed air system driven by a circulating fan. Air is drawn
internally from the rear of the outer drum, passed over a heating element and returned to the front of
the drum via an inlet through the door seal. The warm air travels through the wash load collecting
moisture, the moist air then condenses on a stream of cold water running down the inner rear section
of the outer drum. The relatively dry air is then drawn back over the element to repeat the process.
The circulating fan, one shot cut-out or thermal fuse cable along with a thermistor to control the air
temperature are located in a heater box assembly attached to the top of the outer drum.
The airflow passes through a filter located within the air duct from the outer drum to the heater box
assembly. At the start of every drying program the filter is automatically cleaned by flushing water
through it by means of a fill valve wired in parallel with the hot fill valve for 5 seconds duration.
On products produced from April 2005, Date Code 40, the filter flushing hose was deleted.
On products produced from May 2006 (Serial No. 60508.0000), the flushing valve system was
re-introduced. See notes on Page 5.
The water supply for the condenser is by means of a direct feed from a cold inlet valve to the rear of
the outer drum and is pumped out approximately every 30 seconds.
The closed air system is sealed by a 'P' trap located within the dispenser inlet hose.
The hose is topped up with cold water every 8 minutes for a duration of 1 second.
There are two heat settings, high and low heat. The default setting is high heat, low heat is selected
by means of a push button on the console. The drying time is selected by means of a rotary switch
also located on the console. The drying times are followed by a 20 minute cool tumble.
Thermal Spin
A thermal spin on the High Heat setting is carried at the start of the of the drying process. The load
is pre-heated to approximately 50°C by the dryer heater with normal tumble action and pump out.
The thermistor located in the wash heater will sense the load temperature and when 50°C is achieved
a 5 minute Spin profile will be carried out at full spin speed.
During thermal spin the out of balance detection will operate and maximum speed will only be
achieved depending on the out of balance condition.
On completion of the Thermal Spin, the tumble drying process will commence for the period of time
selected.
Thermal spin is NOT available when low heat is selected.
Warm Humid Air
Cold Dry Air
Warm Dry Air
Airflow Diagram