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ELECTRICAL FEATURES TD 73A
General design
TD 73A is a vented dryer, which incorporate a microprocessor for process control,
and pushbutton selection of programs. The pushbutton panel also carries LEDs
and two-digit 7-segments displays which indicate selected time (for times
programs), time-delayed starts etc.
Electrical supply
The machines are supplied as 3-phase, 230V, 10A, heater power 2620W. They
can also be reconnected internally to suit them for a single-phase, heater power
2620W, 16A or single-phase. Heater power 1900W, 10A.
Programcontrol
Control unit
The control unit has a microprocessor for control of the motor, heater, program etc.
Keyboard
The keyboard includes pushbuttons and indicators.
Main On/Off switch
The main On/Off switch is fitted in the centre of the lower edge of the panel, is a 2-
pole switch and disconnects the phase and the zero-line.
Indicating lamp
The indicating lamp shows that the main switch is turned on.
Door switch
The door operates a door-switch that, when open, interrups the program. If the
door has been opened while the machine is running, and then closed again, the
machine must be restarted by the Start pushbutton.
Drive motor
The main drive motor is at the bottom of the machine, driving the drum and the two
fans that circulate internal air and external air.
Heater
TD 73 A: The maximum heating power is 2620W provided by two heaters with
ratings of 1900W and 720W respectively, so that the machine can be recon-
nected to provide a reduced heating power of 1900W.
TD 73
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