Asko TD70 Manuale utente

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

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.

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