Asko TD70 User manual

INDEX
TD70
TD73
TD76
TD77
DRYERS

Content
Page
Tumble dryers
TD70A 1-2
TD73A 3-7
TD76A 8-9
TD77A 10-14

TD 70
PROGRAM AND ELECTRICAL FEATURES TD 70 A
General design
TD 70 A have thermostat-controlled automatic programs to 47° C or 60° C and time
programs up to 60 min.
Alternative connections
Alternative connections are single-phase, 230 V, 10 or 16 A with 1900 and 2850 W
power respectively, 2-phase 400 V, 10 A, 2850 W (normal on delivery) 3-phase, 400
V, 10 A, 2850 W or 3-phase, 230 V, 16 A, 2850 W heating capacity.
Switching
Switching between the various alternative connections is made directly on the con-
nection terminal board according to directions given.
Programs TD 70 A
The automatic programs can be started in setting 1 or 2. Setting 2 is more used, and
gives drying to selected temperature, after which the program continues for about 14
minutes without any heat.
Setting 1 starts earlier in the program and has facility for reconnection of heat for
better drying of small loads.
Program 3 is a time program with setting every 10 minutes. Program 4 is ventilation
without heat, in practice the same as the end of the time program, approximately 14
minutes.
The program unit
The program unit has a mecanically marked setting points, motor with 4-min-stages
and built-in buzzer.
Pushbuttons
The pushbuttons have the following functions:
S Start of program by means of starter relay
T Gives 47°C in pressed-in position and 60°C in released position
Main switch

TD 70
Thermostats
There are four thermostats : The first is of 47°C and the second of 60°C, (for
automatic programs) are fitted to the fan casing.
The third of 115°C (resets automatically) operates at 115°C switching out
one of the heaters if the temperature rises excessively. The fourth thermo-
stat, also fitted to the heater casing, operates at 150°C and provides protec-
tion against dangerous overheating. It must be manually reset.
The manual overheating protection breaks the contact to the starter relay,
which means that the machine stops completely when there is overheating.
Signal lamp
The signal lamp indicates that the main switch is ”on”.
Driving motor
The driving motor is a bi-polar unit with direct-coupling fan and gear facility
for driving the drum.
Capacitor
The capacitor is 8 uF mounted on the component bridge.
Heating element
The heating element with 1900 + 950 W output is the spiral type, located
behind the drum.
Contactor and starter relay
The contactor and starter relay are located on the component bridge. The starter
relay breaks contact when there is overheating and when the door is opened.
Door contact
The door contact is actuated by the door, and breaks the operating circuit.
Buzzer
The buzzer is installed in the program unit and gives two signals at end of pro-
gram.
Internal cables
Internal cables are 0,75 or 1,5 mm2and 1,0 mm2for earth wire.
Connecting cables
The connecting cables shall be RKK or 5x1,5mm2
Wiring diagrams
Wiring diagrams with timer diagrams and cable layout are incorporated in the
machines.

TD 73
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
Overheating cutout
The machine incorporates a manually-resettable overheating cutout, operating
at a temperature of 150°C.
Thermostat
The thermostat has an automatic reset and the breaking temperature is of
115°C. It is used for indication of fluff in the filter or in the condenser. See fault
signals F4. Not all markets.
Capacitor
The drive motor capacitor is of 8µF.
Buzzer
A built-in buzzer is fitted so that the end of the program can be indicated audibly
if required.
Lighting
An interior drum light is fitted and is operated by the door switch.
Temperature sensing
Machine temperature is controlled by a thermistor for exact control. If the ther-
mistor is loose or gets a short circuit, the program is stopped. See fault signal
F3.
Moisture sensing
A moisture sensor, measuring the humidity of the circulating air, controls the
drying process. The output from the sensor should be between 1-16 mV DC
when the machine is running. Other values from the sensor will stop the pro-
gram. See fault signal F5.
Interference suppression
The machine incorporates two RFI suppressors.
Starting relay
A relay mounted on the electrical components platform interrupts the power a) if
the machine overheats, b) if the door is opened or c) at the end of a program.
Mains cable
The mains cable is an RKK 3x1,5 or 5x1,5 mm2, with variants for different
markets.
Maximum operating time
In order to prevent the dryer from operating indefinitely (for whatever reason),
the maximum running time is 180 minutes, after which the program is
interrupted.See fault signal F2.

TD 73
Program
S1.1- Automatic programs
S1.4 In this program the drying time is controlled by the microprocessor, depending
on the moisture level measured by the moisture sensor and the dryness of the
chosen program. The temperature is controlled by the thermistor to 60°C.
By very small loads or empty machine, these programs will use a drying time of
about 20 minutes.
S1.1 Extra dry
S1.2 Normal dry 1
S1.3 Normal dry 2
S1.4 Iron dry
The programs are ended by a cooling-down sequence, which goes on till
the air temperature is ca 40°C or for a maximum time of 15 min. D2 indicates
”C” during the cooldown period.
S1.5 Timed program
One press on S1.5 means 5 min. drying time + cool down till the air temperature
is 40°C or maximum 15 minutes.
Continued pressings increases the drying time to 10, 15, 20, 30, 50, 60, 70, 80,
90, C (just cool air 15 min.), 5, 10 etc.
Drying temperature 53°C.
D1 and D2 indicates drying time in minutes. After starting the machine counts
down with 1 for each minute. Cool down sequence is indicated with ”C”.
S2 Low temperature
Lowers the temperature in program S1.1-Sl.4 from 60°C to 53°C.
S2 is automatically activated in program S1.5.
S3 Intermittent action
Means that the motor rotates for 3 seconds every minute during one hour after
end of program.
S4 Buzzer
A buzzer tone of 3 seconds (ca 65 dBA) indicates end of program.
S1.2 S1.4S1.3S1.1 S2S3 S6S1.5 S5S4
L1
D1
L6L7L4L3
L2 L5
D2 D3 D4

TD 73
S5 Start/Stop
Start a program by pressing the button and stop by pressing it for 3 seconds.
S6 Time delayed start
The start of a program can be delayed for 1-12 hours. Push the button so many
times that you want the start to be delayed. By thirteenth press, the delay will be
zero. D3 and D4 indicate the chosen amount of hours.
Test program
Through pressing S1.1 5 times and S1.2 for 5 times, you get into a test program.
A press on S1.2 will lit L1-L4 and D1-D2
” S1.3 ” L5-L8 ” D3-D4
” S4 The buzzer is activated
There will be a heating up till 53° C. After that the heater, low effect, is turned off.
The heating-up continues to 60°C and then all components are shut off.
During the heating-up the moisture in the machine is indicated by D1 and D2
(normally 3-13). D3 and D4 indicate the temperature.
Fault signals:
The following codes are indicated by D3 and D4.
F2 Maximal drying time, 3 hours
F3 Thermistor fault
F4 Fluff in the fluff filter or in the condenser (indicated after end of program)
F5 Fault in the moisture sensor
Reasons for faults
Open-circuited or short-circuited thermistor
This will interrupt the program and produce a flashing F3 on the display. An open circuit
can be caused by a broken connection or a faulty thermistor. The resistance of a
helthy thermistor is between 60 kohm and 40 kohm at 20-30°C.
Thermistor not in thermal contact with the fan casing
The heating element will be energised as long as the thermistor does not sense the air
temperature called for by the program, resulting in excessive air temperature.

TD 73
Filter clogged
The overheating cutout (150°C) will operate, and the machine stops.Must be reset
manually.
Moisture sensor not installed in the fan casing or fault in the control unit
The machine stops after ca 20 min.
Incoming suppIy fuses blown
Fuse L1 blown: Machine will stop after ca. 20 minutes. Heater power will be reduced
(720W)
Fuse L2 blown:The machine will not start. Main power On light extinguished.
Fuse L3 blown: Machine operates, but with extended running time (low heater power
1900W).
380V between phase and neutral
The fan motor will stop after a few seconds. The overheating cutout will operate, but
the heater and controls will be destroyed.

TD 76
PROGRAM AND ELECTRICAL FEATURES TD 76 A
General design
TD 76 A has thermostat-controlled automatic programs to 47° C or 60° C and time
programs up to 60 min.
Alternative connections
Alternative connections are single-phase, 230 V, 10 or 16 A with 1900 and 2850 W
power respectively, 2-phase 400 V, 10 A, 2850 W (normal on delivery) 3-phase, 400
V, 10 A, 2850 W or 3-phase, 230 V, 16 A, 2850 W heating capacity.
Switching
Switching between the various alternative connections is made directly on the con-
nection terminal board according to directions given.
Programs TD 76A
The program is a time program with marking every 20 minutes. The drying is
terminated by a cool-down period of 12 minutes. You can set this sequence directly
and to get an airing program.
The program unit
The program unit has a mecanically marked setting points, motor with 4-min-stages
and built-in buzzer.
Pushbuttons
The pushbuttons have the following functions:
S Start of program by means of starter relay
T Gives 47°C in pressed-in position and 70°C in released position
Thermostats
There are four thermostats : The first is of 47°C and the second of 70°C, are fitted to
the fan casing.
The third of 115°C (resets automatically) operates at 115°C switching out one of the
heaters if the temperature rises excessively. The fourth thermostat, also fitted to the
heater casing, operates at 150°C and provides protection against dangerous over-
heating. It must be manually reset.
The manual overheating protection breaks the contact to the starter relay, which
means that the machine stops completely when there is overheating.

TD 76
Signal lamp
The signal lamp indicates that the main switch is ”on”.
Driving motor
The driving motor is a bi-polar unit with direct-coupling fan and gear facility
for driving the drum.
Capacitor
The capacitor is 8 uF mounted on the component bridge.
Heating element
The heating element with 1900 + 950 W output is the spiral type.
Contactor and starter relay
The contactor and starter relay are located on the component bridge. The starter
relay breaks contact when there is overheating and when the door is opened.
Door contact
The door contact is activated by the door, and breaks the operating circuit.
Condensate water pump
There is a pump in the machine to pump water from the lower container to a
container in the panel.
Overflow protection
If both the water containers become full, a level switch on the lower container
stops the program. It is controlled by a micro switch fitted on the lower container.
Internal cables
Internal cables are 0,75 or 1,5 mm2and 1,0 mm2for earth wire.
Connecting cables
The connecting cables shall be RKK 3, 4 or 5x1,5mm2
Wiring diagrams
Wiring diagrams with timer diagrams and cable layout are incorporated in the
machines.

TD 77
ELECTRICAL FEATURES TD 77A
General design
TD 77A is a condensing tumble 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 2850W . They
can also be reconnected internally to suit them for a single-phase, heater power
2850W , 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.
Condensate pump
The machine includes a pump to pump condensated water from the lower con-
tainer to an upper container behind the control panel.
Heater
TD 77 A: The maximum heating power is 2850W provided by two heaters with
ratings of 1900W and 950W respectively, so that the machine can be reconnected
to provide a reduced heating power of 1900W.

TD 77
Overheating cutout
The machine incorporates a manually-resettable overheating cutout, operating
at a temperature of 150°C.
Thermostat
The thermostat has an automatic reset and the breaking temperature is of
115°C. It is used for indication of fluff in the filter or in the condenser. See fault
signals F4. Not all markets.
Capacitor
The drive motor capacitor is of 8µF.
Buzzer
A built-in buzzer is fitted so that the end of the program can be indicated audibly
if required.
Lighting
An interior drum light is fitted and is operated by the door switch.
Overflow protection
If both the water containers become full, a level switch on the lower container
stops the program and indicates on the display. It is controlled by a micro
switch fitted on the lower container. See fault signal F1.
Temperature sensing
Machine temperature is controlled by a thermistor for exact control. If the ther-
mistor is loose or gets a short circuit, the program is stopped. See fault signal
F3.
Moisture sensing
A moisture sensor, measuring the humidity of the circulating air, controls the
drying process. The output from the sensor should be between 1-16 mV DC
when the machine is running. Other values from the sensor will stop the pro-
gram. See fault signal F5.
Interference suppression
The machine incorporates two RFI suppressors.
Starting relay
A relay mounted on the electrical components platform interrupts the power a) if
the machine overheats, b) if the door is opened or c) at the end of a program.
Mains cable
The mains cable is an RKK 3x1,5 or 5x1,5 mm2, with variants for different
markets.
Maximum operating time
In order to prevent the dryer from operating indefinitely (for whatever reason),
the maximum running time is 180 minutes, after which the program is
interrupted.See fault signal F2.

TD 77
Program
S1.1- Automatic programs
S1.4 In this program the drying time is controlled by the microprocessor, depending
on the moisture level measured by the moisture sensor and the dryness of the
chosen program. The temperature is controlled by the thermistor to 75°C.
By very small loads or empty machine, these programs will use a drying time of
about 20 minutes.
S1.1 Extra dry
S1.2 Normal dry 1
S1.3 Normal dry 2
S1.4 Iron dry
The programs are ended by a cooling-down sequence, which goes on till
the air temperature is ca 35°C or for a maximum time of 15 min. D2 indicates
”C” during the cooldown period.
S1.5 Timed program
One press on S1.5 means 5 min. drying time + cool down till the air temperature
is 35°C or maximum 15 minutes.
Continued pressings increases the drying time to 10, 15, 20, 30, 50, 60, 70, 80,
90, C (just cool air 15 min.), 5, 10 etc.
Drying temperature 50°C.
D1 and D2 indicates drying time in minutes. After starting the machine counts
down with 1 for each minute. Cool down sequence is indicated with ”C”.
S2 Low temperature
Lowers the temperature in program S1.1-Sl.4 from 75°C to 50°C .
S2 is automatically activated in program S1.5.
S3 Intermittent action
Means that the motor rotates for 3 seconds every minute during one hour after
end of program.
S4 Buzzer
A buzzer tone of 3 seconds (ca 65 dBA) indicates end of program.
S1.2 S1.4S1.3S1.1 S2S3 S6S1.5 S5S4
L1
D1
L6L7L4L3
L2 L5
D2 D3 D4

TD 77
S5 Start/Stop
Start a program by pressing the button and stop by pressing it for 3 seconds.
S6 Time delayed start
The start of a program can be delayed for 1-12 hours. Push the button so many
times that you want the start to be delayed. By thirteenth press, the delay will be
zero. D3 and D4 indicate the chosen amount of hours.
Test program
Through pressing S1.1 5 times and S1.2 for 5 times, you get into a test program.
A press on S1.2 will lit L1-L4 and D1-D2
” S1.3 ” L5-L8 ” D3-D4
” S4 The buzzer is activated
” S1.4 starts the motor,heater, high effect, heater low effect, and
outlet pump .
There will be a heating up till 50° C . After that the heater, low effect, is turned off.
The heating-up continues to 60°C and then all components are shut off.
During the heating-up the moisture in the machine is indicated by D1 and D2
(normally 3-13). D3 and D4 indicate the temperature.
Fault signals:
The following codes are indicated by D3 and D4.
F1 Overfilling in the condensate water container
F2 Maximal drying time, 3 hours
F3 Thermistor fault
F4 Fluff in the fluff filter or in the condenser (indicated after end of program)
F5 Fault in the moisture sensor
Reasons for faults
Open-circuited or short-circuited thermistor
This will interrupt the program and produce a flashing F3 on the display. An open circuit
can be caused by a broken connection or a faulty thermistor. The resistance of a
helthy thermistor is between 60 kohm and 40 kohm at 20-30°C.
Thermistor not in thermal contact with the fan casing
The heating element will be energised as long as the thermistor does not sense the air
temperature called for by the program, resulting in excessive air temperature.

TD 77
Filter clogged
The overheating cutout (150°C) will operate, and the machine stops.Must be reset
manually.
Moisture sensor not installed in the fan casing or fault in the control unit
The machine stops after ca 20 min.
Incoming suppIy fuses blown
Fuse L1 blown: Machine will stop after ca. 20 minutes. Heater power will be reduced
(950W)
Fuse L2 blown:The machine will not start. Main power On light extinguished.
Fuse L3 blown: Machine operates, but with extended running time (low heater power
1900W).
380V between phase and neutral
The fan motor will stop after a few seconds. The overheating cutout will operate, but
the heater and controls will be destroyed.