Miele B 890 Technical information

TECHNICAL INFORMATION
B890 Rotary Iron
© 2003 Miele
B890 Rotary Iron - Table of Contents
1.0 CONSTRUCTION & DESIGN
1.1 Appliance Overview
1
1.2 Controls Overview
1
1.3 Technical Specifications
2
1.4 Layout of Mechanical Components
3
1.5 Layout of Electrical Components
3
2.0 INSTALLATION
Installation Procedures
5
3.0 COMMISSION and OPERATION
3.1 General Operation
7
3.1.1 Opening the Appliance for Use
7
3.1.2 Main Power Switch
7
3.1.3 Ironing Temperature
8
3.1.4 Ironing Temperature / Clothing Care Symbols
8
3.1.5 Adjusting Roller Speed
9
3.1.6 Foot Pedal Operation
9
3.2 Emergency Release
10
3.3 Transit Fitting
10
4.0 DESCRIPTION of FUNCTION
4.1 Electronics
11
4.2 Transformer
11
4.3 Foot Switches
12
4.4 Heater Plate Drives – Operation
13
4.5 Roller Assembly / Drives
13
4.6 Heater Circuit
14
4.7 Finger Guard Switch
15
5.0 SERVICE and MAINTENANCE
5.1 Control Electronic – Removal
17
5.2 Transformer – Removal
17
5.3 Main Electronic Unit – Removal
18
5.4 Foot Switches – Removal
18
5.5 Finger Guard Switch – Removal
19
5.6 Limit Switches – Removal
19
5.7 Heater Plate Drive Motor - Removal
20
5.8 Roller Assembly - Removal
21
5.9 Free Wheel Mechanism - Removal
22
5.10 Drive Shaft – Removal
23
5.11 Roller Drive Motor - Removal
23
5.12 Heater Plate Cover - Opening
24
5.13 Leaf Spring With Holder – Replacement
24
5.14 Insulation Matting - Removal
24
5.15 Hinge Pressure Spring – Setting / Adjustment
25
5.16 Hinge Spring – Removal
25
5.17 Bowden Cable – Releasing Tension
26
5.18 Bowden Cable - Removal
26
6.0 FAULT DIAGNOSIS
6.1 Electronic Boards
28
6.1.1Main Electronic
28
6.1.2 Control Electronic
29
6.2 Wire Diagram
30
B890 Rotary Iron – List of Figures
1-1 Overview of Rotary Iron
1
1-2 Overview of Controls
1
1-3 Overview of Mechanical Components
3
1-4 Overview of Electrical Components
3
2-1 Removing the Feed Board
5
2-2 Removing the Protective Cover from the Roller
5
3-1 Opening the Rotary Iron
7
3-2 On / Off Switch
7
3-3 Temperature Adjustment Control
8
3-4 Roller Speed Control
9
3-5 Foot Pedal Operation
9
3-6 Emergency Release Latch
10
3-7 Transit Fitting
10
4-1 Heater Plate Drives
12
4-2 Roller and Drive Components
13
4-3 Heater Circuit
14
4-4 Heater Temperature Control
15
4-5 Finger Guard
15
5-1 End of Roller
21
5-2 Free Wheel Mechanism
22
5-3 Motor Mounting Bolts
23
6-1 Main Electronic
28
6-2 Control Electronic
29
6-3 Wiring Diagram
30
B890 Rotary Iron – List of Tables
1-1 Product Specifications
2
3-1 Temperature Clothing Care Symbols
8
6-3 Wiring Diagram
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B890 Rotary Iron
Technical Information
1.0
Construction and Design
1.1
Appliance Overview
Figure 1-1: Overview of Rotary Iron
1.2
Controls Overview
Figure 1-2: Overview of Controls
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B890 Rotary Iron
Technical Information
1.3
Technical Specifications
Height
Width
Depth
Weight
37” (41 ¾” folded)
39 3/8” (16 3/8 folded)
16 3/8”
84 lbs.
Table 1-1: Product Specifications
The appliance is supplied with a power cord and NEMA 6-20 P plug
ready for connection to an AC single phase 208 V 60 Hz supply.
The fuse rating is 20 amps. The actual amperage draw from the
appliance is 13 amps.
All electrical work should be carried out by a qualified electrician in
accordance with local and national safety regulations.
Do not connect the rotary ironer to an extension cord. Extension
cords do not guarantee the required safety of the appliance (e.g.
danger of overheating).
Important
If it is necessary to change the plug or power cord of the rotary iron,
please take note of the following color codes of the wires:
Green/yellow = ground
Blue = live 1
Brown = live 2
WARNING: This appliance must be grounded
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Technical Information
1.4
Layout of Mechanical Components
Figure 1-3: Overview of Mechanical Components (B890 shown)
1.5
Layout of Electrical Components
Figure 1-4: Overview of Electrical Components (B890 shown)
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Technical Information
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B890 Rotary Iron
Technical Information
2.0
Installation
1. Unpack / uncrate the appliance from the box.
2. Remove the Transit Fitting - see supplementary information for details.
3. Move the appliance to the desired location - see supplementary information
for details on moving the appliance.
4. Install recommended plug to the power cord - DO NOT plug in at this time.
5. Unlatch; remove the Feed Board from the appliance - see figure 1.
Figure 2-1: First remove the feed board
by lifting it out of the right hand holder,
then pull it out to the left of the roller.
6.
7.
8.
9.
Plug the appliance in; briefly turn on the power - the Heater Plate should rise.
Turn off the power.
Remove the protective cover from the roller - see figure 2.
Perform an operational check; ensure all safety features and functions are in
working order.
Figure 2-2: Removing the protective cover
from the roller.
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Technical Information
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B890 Rotary Iron
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3.0
Commission and Operation
3.1
General Operation
3.1.1
Opening the Appliance for Use
Figure 3-1: Opening the Rotary Open
1. Hold the ironing table and release the catch situated on the right
hand side underneath the ironing table.
2. Swing the top section of the rotary ironer to the side until it clicks
into position horizontally.
3.1.2
Main Power Switch
The appliance is switched on and off with the “I=On / 0=Off” button.
To switch on
Press the button in –
the indicator light in the
button comes on.
To switch off
Press and release the
button – the indicator
light in the button goes
out.
Figure 3-2: On / Off Switch
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Technical Information
3.1.3
Ironing Temperature
The temperature selector is used to set the ironing temperature.
The individual temperature ranges are marked by dots on the dial
around the temperature selector. These correspond to the
international clothing care symbols for ironing (see 3.1.3). Turn
the temperature selector to the temperature.
The o C temperature indicator light will come on while the heater
plate is heating up.
Figure 3-3: Temperature Adjustment Control
3.1.4
Ironing Temperature / Clothing Care Symbols
Table 3-1: Temperature Clothing Care Symbol
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Technical Information
3.1.5
Adjusting the Roller Speed
There are 5 roller speed settings, from low (approx. 2 meters per
minute) to high (approx. 4.5 meters per minute). Turn the knob
clockwise to increase the speed.
A lower roller speed makes it easier to iron complicated articles
such as shirts and blouses. It is also best to select a lower roller
speed when ironing folded items, which may require more than
one pass through the ironer to get them smooth and dry.
Figure 3-4: Roller Speed Control
3.1.6
Foot Pedal Operation
The ironing process is controlled by the foot pedal which has three
operating positions:
ƒraising the heater plate (rest)
ƒpressing
ƒironing
Figure 3-5: Foot Pedal Operation
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Technical Information
3.2
Emergency Release
In the event of a power loss when the iron is in use the heater plate
may be in a position where it could continue to make contact with
the roller. The item being ironed would then be held there with the
risk of it becoming damaged. To free the trapped item - Pull upward
on the emergency release lever to reduce the pressure between
the heater plate and the roller; this will allow easy removal of the
item being ironed.
Figure 3-6: Emergency Release Latch
3.3
Transit Fitting
Figure 3-7: Transit Fitting
Keep the transit fitting in a safe place. It must be re-fitted if the
appliance ever has to be moved again.
Note
The rotary ironer should only be transported in a folded up position
with the transit fitting in place.
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B890 Rotary Iron
Technical Information
4.0
Description of Function
4.1
Electronics
The B890 is equipped with two (2) separate electronic board
assemblies. The Control Electronic (A1) is fitted to the inside of the
top cover, and houses the user controls.
The Main Electronic (N2) is located beneath a cover on the top of
the main vertical support of the appliance. The Main Electronic
Is responsible for providing power to the components.
4.2
4.3
4.4
Transformer
The Transformer is mounted to the base-plate of the appliance, and
is covered by the main vertical support of the appliance. The
Transformer is responsible for reducing voltage from 240 (208)
VAC to 17 V for the electronic and several components.
Foot Switches (2S26 and 2S27)
The foot switches are mounted below the footplate and are
actuated by the user to engage the heaterplate to the roller and to
provide drive to the roller assembly.
Heater Plate Drives - Operation
Refer to figure 4-1.
The Heater Plate drives are actuated by the user via the footplate
(see Foot Switches 4.3). The Drive Motor (item 6) is then energized
with 24VDC.
The shaft of the Drive Motor is connected to the Eccentric Cam
(item 7) via an e-clip connection (item 5) so as the Drive Motor
turns the Eccentric Cam rotates. The rotation of the eccentric cam
moves the Guide Strips (item4) and applies pressure to the spring
(item 1) causing the heater plate to close against the roller.
Power to the motor is interrupted as the guide strip actuator
contacts the “Plate ON Roller Switch” (item 2), leaving the heater
plate against the roller for ironing.
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When the user releases the foot pedal, the drive motor is energized
in the opposite direction. The eccentric cam (item 7) rotates –
pressure is released from the spring (item 1) and the heater plate
moves away from the roller. The drives continue until the “Plate
OFF Roller Switch” is actuated by the Guide Strip (item 4).
Heater Plate Drives
6
7
1.
2.
3.
4.
5.
6.
7.
Pressure Spring
S27 Plate on Roller Switch
S26 Plate Off Roller Switch
Heater Plate Guide Strips (two)
Motor Shaft and “E-Clip” Retainer
Motor (M18)
Eccentric Cam
Figure 4-1: Heater Plate
Drives
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Technical Information
4.5
Roller Assembly / Drives
Figure 4-2: Roller and drive components
A single driveshaft is connected to the roller via a free-wheel
bearing which permits the roller to turn in one direction only.
The driveshaft is mechanically connected to the Drive Motor (M17).
Power to the motor (24 VDC) is controlled by the users actions via
the footplate (see Footswitches 4.3).
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4.6
Heater Circuit
Refer to figure 4-3.
The Heaterplate contains three heating elements within a parallel
Circuit (1 Kw / 52 ohms for each element). The temperature is
regulated using an Adjustable Temperature Control Device (see
figure 4-4) mounted in series before the heating elements.
In addition, the heating circuit contains two Thermal (Hi-limit) Cutouts also electrically mounted in series to the heating elements.
Should the temperature exceed 2000 C the circuit electrically
interrupted.
Figure 4-3: Heater electrical circuit
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Technical Information
Figure 4-4: Heater temperature control
4.7
Finger Guard Switch
Figure 4-5: Finger Guard
The Finger Guard is the small lip in the front of the Heater Plate
Assembly, that can be lifted slightly. The Finger Guard Switch is
actuated if the Finger Guard is lifted or moved from it’s regular
position. This system ensures that if the operator should
accidentally make contact with the Heaterplate while the Roller is
turning; power is interrupted to prevent injuries.
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Technical Information
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B890 Rotary Iron
Technical Information
5.0
5.1
Service and Maintenance
Control Electronic (A1) - Removal
1. Remove the cover screw and lift off the cover (rear first).
2. Tilt cover forward and upward from the appliance.
Note
Use caution when removing cover from the appliance as
wiring is still connected to the control board mounted inside
the cover.
To Remove the Control Panel Circuit Board from the
cover continue as follows:
3. Remove the screws securing the circuit board to the
inside of the cover.
4. Make note of the location of electrical connections and
carefully unplug from the circuit board.
5.2
Transformer (T1) - Removal
1. Lay the ironer on its back.
2. Remove the tension from the Bowden cable by
disconnecting the tensioner spring.
3. Remove four bolts from the underside of the footplate
from the support column using a socket spanner.
4. Carefully remove the footplate.
Caution
The electrical connections are not very long.
5. Disconnect the 2 group plugs.
6. Remove the 2 screws from the transformer holder.
7. Remove the transformer.
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Technical Information
5.3
Main Electronic Unit (N2) - Removal
1. Lift the handle (locking catch) at the right under the table and
hold the table.
2. Tilt the folding part of the ironer down until it is vertical and locks
into place.
3. Remove the screw from the cover at the top of the support
column.
4. Remove the cover from the column (it may be necessary to
remove the spring).
5. Remove the left cover from the column.
6. Remove the screw.
7. Disconnect the electrical connections.
8. Remove the electronic unit with its holder.
Note
If a new electronic unit is to be fitted, perform the electrical
connections to the electronic immediately. This avoids the risk of
incorrect connection.
5.4
Foot Switches (2S26 & 2S27) - Removal
1. Lift the handle (locking catch) at the right under the table and
hold the table.
2. Tilt the folding part of the ironer until it is horizontal and locks
into place.
3. Lay the ironer on its back.
4. Remove two screws from the bottom next to the two access
holes under the footplate.
5. Remove the foot switch strip.
6. Remove the screws from the switch holder.
7. Disconnect the plug connections.
8. Remove the appropriate switch.
Note
When refitting the screws, slide the bearings into the correct
positions so the guide lugs engage in their holes.
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Technical Information
5.5
Finger Guard Switch (F6/5) - Removal
1.
2.
3.
4.
Perform the “Opening the Heater Plate Cover” procedure.
Remove the 2 screws from the switch holder.
Disconnect the plug connections.
Remove the switch.
Note
The switching point of the finger guard strip cannot be modified.
5.6
Limit Switches (S26 & S27) - Removal
1.
2.
3.
4.
5.
Remove the 2 screws under the table from the motor unit cover.
Remove the cover.
Disconnect the plug from the appropriate switch.
Remove the 2 screws from the appropriate switch.
Remove the switch.
Caution
When refitting, take care to ensure the plugs are connected
correctly as they are not coded or keyed connections.
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Technical Information
5.7
Heater Plate Drive Motor (M18) – Removal
1. Remove the 2 screws under the table from the motor unit cover.
2. Remove the cover.
Note
How wiring is routed so it can be rerouted correctly during
reassembly.
3. Remove the retaining screw from the left and right guide strips.
4. Tilt the guide strips with the switches slightly and remove them.
5. Disconnect the plug connections from the DC motor.
6. Remove the e-clip from the shaft.
7. Remove the holder screws from the table.
8. Tilt the DC motor with its holder downwards.
9. Press the DC motor shaft out of the eccentric drive.
10. Remove the DC motor.
Note - During reassembly…
ƒEnsure the guide strips for the switches are correctly
located in the grooves on the slider
ƒEnsure the alignment lugs are engaged properly
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B890 Rotary Iron
Technical Information
5.8
Roller Assembly - Removal
1. Remove the feed board.
2. Open the ironing cloth at the left end. Complete removal of cloth
is not necessary.
3. Remove the roller end plate.
Note
Adhesive residue may make it difficult to remove the end plate.
4. Remove the middle screw (Torx T30) from the interior of the
roller and remove it with its washer. See figure 1.
Figure 5-1: End of roller
5. Loosen the roller at the right by giving it an axial jolt using both
hands.
6. Remove the roller.
Note
When refitting the end plate, ensure the notch aligns with the lug on
the interior of the roller.
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5.9
Free-wheel Mechanism - Removal
Figure 5-2: Free-wheel mechanism
1. Perform the “Roller Assembly - Removal” procedure.
2. Unscrew the three screws from the interior of the roller.
3. Remove the free-wheel mechanism and bearing flange.
Note
Reassemble by following these instructions in reverse order. When
refitting, position the free-wheel mechanism and bearing flange on
the roller shaft. Then place the roller in position and turn it until the
screw holes align.
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B890 Rotary Iron
Technical Information
5.10
5.11
Driveshaft - Removal
1. Remove the screw from the rear of the cover around the control
panel.
2. Lift the hood at the rear and unclip it at the front.
3. Remove the cover assembly.
4. Perform the “Roller Assembly - Removal” procedure.
5. Access the interior side of the frame (where cover was just
removed from).
6. Remove the e-clip from the end of the drive shaft (next to the
gear)
7. Remove the shaft from the gear by pulling the shaft away from
the appliance.
8. Remove the cog wheel.
9. Remove the shaft.
Roller Drive Motor (M17) - Removal
1. Perform the “Roller Assembly - Removal” procedure.
2. Perform the “Driveshaft - Removal” procedure.
3. Remove the 2 screws securing the motor to the frame from
outside frame, as shown in figure2.
Figure 5-3: The motor is mounted to the
frame using two bolts.
4. Remove the motor partially by lifting it upward.
5. Unplug the motor from the harness.
6. Continue to lift the motor out of the appliance.
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Technical Information
5.12
5.13
Heater Plate Cover – Opening
1.
2.
3.
4.
5.
6.
Switch on the machine.
Operate the foot switch to lower the heater plate onto the roller.
Switch off the machine and unplug it from the mains.
Remove the screws from the left and right end-caps.
Remove the left and right end caps.
Lift the cover at the top and carefully slide it down onto the
folding part.
Leaf Spring With Holder - Replacement
1. Perform the “Opening The Heater Plate Cover” and “Insulation
Matting.
2. Removal” procedures.
3. Pull the tensioning strap upwards.
4. Remove the circlip.
5. Remove the bolt.
6. Remove the wiring harness fixing clips.
7. Disconnect the earth wire from the bracket.
8. Remove the holder fixing screws from the heater plate.
9. Remove the holder.
10. Fit the new holder.
Service Tip
If the Emergency Release does not allow laundry to be removed
the leaf spring may need replacement.
5.14
Insulation Matting - Removal
1. Perform the “Opening the Heater Plate Cover” procedure.
2. Disconnect the electrical connections from the switches.
3. Remove the insulation matting.
Note
Take care not to damage the matting cutouts when pulling it free of
the switches.
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Technical Information
5.15
Hinge Pressure Spring – Setting / Adjustment
Note
Setting should only be made with the heater plate lowered onto the
roller.
1.
2.
3.
4.
5.
6.
Lower the heater plate onto the roller.
Remove the 2 screws under the table from the motor unit cover.
Remove the cover.
Unscrew the bolt from the cross pin.
Apply locking compound to the end of the bolt.
Screw the bolt in such that the pressure spring is compressed to
a length of approximately 13/16 inches
Note
After correct setting, the gap between the bolt head and the cross
pin at the head of the bolt should be approximately 1/16 of an inch
with the heater plate lowered onto the roller.
5.16
Hinge Spring - Removal
1. Lift the handle (locking catch) at the right under the table and
hold the table.
2. Tilt the folding part of the ironer down until it is vertical and locks
into place.
3. Tilt the folding part of the ironer back up until the spring is
virtually un-tensioned.
4. Release the spring from its holder using needle-nose pliers.
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Technical Information
5.17
Bowden Cable - Releasing Tension
1. Access the underside of the iron directly under the main vertical
support.
2. Use a suitable tool to grasp the hook end of the spring.
3. Carefully lift the spring from its mounting hole.
4. Move spring away from the mounting hole and allow spring to
pull itself into the spring opening.
Caution
When spring tension has been removed from the Bowden Cable
the iron will open very differently and have no self tensioning at the
hinge.
5.18
Bowden Cable - Removal
1. Perform “Bowden Cable - Releasing Tension” (5.17).
2. Carefully open the iron into the vertical position.
3. Loosen the cable retainer screw and move the cable retainer to
the side.
4. Pull cable from retainer area and lift cable from vertical support.
It may be necessary to reposition the iron if the hook on the
spring attached itself to the frame again.
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Technical Information
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B890 Rotary Iron
Technical Information
6.
Fault Diagnosis
6.1
Electronic Boards
6.1.1
Main Electronic (N2)
Figure 6-1: Main Electronic
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B890 Rotary Iron
Technical Information
6.1.2
Control Electronic (A1)
Figure 6-2: Control Electronic
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B890 Rotary Iron
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6.2
Wire Diagram
Figure 6-3: Wire Diagram
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