Miele KM 342 Technical information

TECHNICAL INFORMATION
MasterChef Collection Cooktops
© 2004 Miele
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MasterChef Collection Cooktops - Table of Contents
1.0 CONSTRUCTION & DESIGN
1.1 Summary of MasterChef Cooktops
1
1.2 Appliance Overview
3
1.2.1 KM342 Overview
3
1.2.2 KM344 Overview
5
1.2.3 KM421 Overview
7
1.2.4 KM424 Overview
8
1.2.5 KM427 Overview
11
1.2.6 KM452 Overview
13
1.2.6.1 KM452 Touchpad Controls
14
2.0 INSTALLATION
2.0 Installation
15
3.0 COMMISSION and OPERATION
3.1 KM342 and KM344 General Operating Information
17
3.1.1 Fast Ignition System
17
3.1.2 Operating a Burner
17
3.2 KM421, KM424 and KM 427 General Operating Information
18
3.2.1 Operating a Single Burner
18
3.2.2 Operating a Variable / Extended Burner
18
3.3 KM452 General Operating Information
19
3.3.1 Overview of Controls
19
3.3.2 Touch Controls
19
3.3.3 Turning On a Burner
20
3.3.4 Auto Heat Setting
20
3.3.5 Touch Controls – Automatic Reset
21
3.3.6 Touch Controls – Manual Rest
21
3.3.7 Residual Heat Indicator
21
3.3.8 Safety Lock
22
4.0 DESCRIPTION of FUNCTION
4.1 Electric Cooktops – General Information
23
4.1.1 Temperature Limiters
23
4.1.2 KM452 Safety Cut Out (Controls Covered)
23
4.1.3 KM452 Safety Cut Out Feature
24
4.1.4 KM452 Touch Controls – Resetting
25
4.1.4.1 Automatic Reset
25
4.1.4.2 Manual Reset
25
4.2 Electric Cooktops – Components
26
4.2.1 Regulator
26
4.2.2 Temperature Monitor
26
4.2.3 Operational Indicator
26
4.2.4 Residual Heat Indicators
26
4.2.5 Heater Elements
26
4.3 Gas Cooktops
27
4.3.1 Operation Overview of Ignition / Re-Ignition System
27
4.3.2 Burner Gas Regulators
30
4.3.3 Connecting to LP Gas
31
4.3.4 Burner Assemblies
31
4.3.4.1 Normal and Fast Burner Assembly
31
4.3.4.2 Super Burner Assembly
31
5.0 SERVICE and MAINTENANCE
5.1 Removing Cooktop for Service
34
6.0 FAULT DIAGNOSIS
6.0.1 Fault Diagnosis – Gas
35
6.0.2 Fault Diagnosis – Electric
36
MasterChef Cooktop Collection – List of Figures
1-1 KM342 Overview
3
1-2 KM344 Overview
5
1-3 KM421 Overview
7
1-4 KM424 Overview
9
1-5 KM427 Overview
11
1-6 KM452 Overview
13
1-7 KM452 Controls
14
2-1 Miele Installation Manual (Typical Cover)
15
3-1 KM452 Controls
19
4-1 Ignition / Re-Ignition System
28
4-2 Re-Ignition Control System
29
4-3 KM342 and KM344 Normal / High Speed Burner Components
30
4-4 KM342 and KM344 Wok Burner Components
31
5-1 Removing the Cooktop for Service
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MasterChef Cooktop Collection – List of Tables
1-1 Summary of MasterChef Collection Cooktops
1
4-1 Safety Cut Out Setting and Operating Hours
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MasterChef Collection Cooktops
Technical Information
1.0
Construction and Design
1.1
Summary of MasterChef Cooktops
Model
Number
KM342
Description of
Cooktop
Electric - 24” Four
Burner w/
Black Ceran Finish
KM424
120VAC
- Two 9000 BTU Burners
- One 12000 BTU High Speed Burner
- Two 15300 BTU Double Ring Superburners
120VAC
-
240VAC
(30 Amp)
- Two 1200 Watt Burners
- Two 1800 Watt Burners
240VAC
(40 Amp)
-
One 1200 Watt Burner
One Variable 1800 Watt Burner
One Variable 2400 Watt Burner
One Variable 2400 Watt Oval Burner
240VAC
(50 Amp)
-
Two 1200 Watt Burners
One Variable 1800 Watt Burner
One Variable 2500 Watt Square Burner
One Variable 2500 Watt Burner
6 Burner Gas
Available in Black, White &
Stainless Steel
KM421
Burners
(Max BTU or Watts)
5 Burner Gas
Available in Black, White &
Stainless Steel
KM344
Electrical
Data
Electric - 30” Four
Burner / Seven
Cooking Zones w/
Black Ceran Finish
KM427
Electric - 36” Five
Burner / Eight
Cooking Zones w/
Black Ceran Finish
KM452
Electric - 42” Six
Burner / Nine
Cooking Zones w/
Two 90000 BTU Burners
Two 12000 BTU High Speed Burners
One 15300 Double Ring Superburner
One 16500 Double Ring Superburner
- Front Left : 1100/2500 Watts (variable)
240VAC
(50 Amp)
Black Ceran Finish
- Rear Left and Right: 1200 Watts / each
- Rear Middle: 1800 Watts / each, 4400
with extended area on
- Front Right: 900/2400 Watts (variable)
Table 1-1: Summary of MasterChef Collection Cooktops
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1.2
Appliance Overview
Products are listed in numeric order by model number.
1.2.1
KM342 - Overview
1.
2.
3.
4.
Super Burner
Normal Burner
Fast Burner
Grates
Figure 1-1: KM342 Overview
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1.2.2
KM344 – Overview
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Super Burner
Normal Burner
Fast Burner
Grates
Large Wok Burner
Control Knob - Left rear burner
Control Knob - Center rear burner
Control Knob - Right rear burner
Control Knob - Front left burner
Control Knob - Front center burner
Control Knob - Front right burner
Figure 1-2: KM344 Overview
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1.2.3
KM421 - Overview
1-4
5
6
7
8
9
Single Burners
Control Knob - Rear / Left
Control Knob - Rear / Right
Control Knob - Front / Left
Control Knob - Front / Right
Residual Heat Indicators
Figure 1-3: KM421 Overview
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1.2.4
KM424 - Overview
1
2
3-4
5
6
7
Single Burner
Extended Burner
Variable Burners
Indicator Lights
Control Knobs
Residual Heat Indicators
Figure 1-4: KM424 Overview
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1.2.5
KM427 - Overview
1&3
2
4&5
6
7
8
Single Burners
Extended Burner
Variable Burners
Indicator Lights
Residual Heat Indicators
Control Knobs
Figure 1-5: KM427 Overview
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1.2.6
KM452 - Overview
1&6
2-5
3-4
7
Variable Burners
Single Burners
Extended burner Area
Touch Controls
Figure 1-6: KM452 Overview
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Technical Information
1.2.6.1
KM452 Touchpad Controls
1.
2.
3.
4.
5.
Timer Control (front left burner)
Main On/Off Control
Safety Lock
Safety Lock Indicator
Timer Control (front right burner)
Figure 1-7: KM452 Controls
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Technical Information
2.0
Installation
For information on appliance information refer to the Miele
Installation Manual and the product specific Operating Manual.
Figure 2-1: Miele Installation Manual
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3.0
Commission and Operation
3.1
KM342 and KM 344 General Operating Information
3.1.1
Fast-Ignition-System
The gas cooktops are equipped with a Fast-Ignition-System
incorporating the following features:
The control knob can be released once it is turned to the largest
flame symbol.
If the flame goes out during use, (i.e. from a draft) the burner will
automatically relight. If the re-ignition process is unsuccessful,
the gas supply will automatically be shut off.
3.1.2
Operating a Burner
To Light a Burner
Press down and turn the corresponding control knob counterclockwise to the largest flame symbol and release the knob. The
igniter will click and ignite the gas.
The ignition process takes about 8 – 10 seconds. The flame should
light within 4 seconds. The Fast-Ignition-System will click a few
seconds after the flame is lit to ensure the safety system was
activated.
To Adjust the Setting:
Turn the knob without pressing down. Adjustment should be
performed from the 9 o’clock position down. Failure to do so may
result in the ignition being activated between the 9 and 12 o’clock
positions.
To Extinguish a Burner
Turn the control knob clockwise to the
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MasterChef Collection Cooktops
Technical Information
3.2
KM421, KM424 & KM 427 General Operating
Information
3.2.1
Operating a Single Burner
A burner without the symbol
next to the control knob is turned on
by pushing the control knob down and turning it clockwise or
counter-clockwise to the desired setting.
To adjust the setting, turn the knob without pressing down. The
burner is turned off by turning the control knob clockwise or
counterclockwise to "0".
3.2.2
Operating a Variable / Extended Burner
If a burner has the symbol
next to the control knob, you can
switch on an additional outer or extended heating circle.
To Turn On a Burner:
Push down and turn the control knob:
Clockwise to the desired setting turns on one heating circle.
Counter-clockwise to the desired setting to turn on both heating
circles.
Note
If both heating circles are turned on an indicator light will come on
left of the control knob.
To Adjust the Setting:
Turn the knob without pressing down.
To Turn the Burner Off:
Turn the knob without pressing down to the "0" position.
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3.3
KM452 - General Operating Information
3.3.1
Overview of Controls
1.
2.
3.
4.
5.
Timer Control
On / Off Control
Safety Lock
Safety Lock Indicator
Timer Control
Figure 3-1: KM452 Controls
3.3.2
Touch Controls
The KM452 uses electronic touch controls activated by a finger.
There is a separate touch control for each burner. A tone sounds to
indicate that contact has been made with a control. Keep the
control area clean.
Note
To prevent damage to the electronics never place hot pans on the
control panel.
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3.3.3
Turning On a Burner
Once the cooktop is turned on, touch the
"ON/OFF" control of
the burner you wish to use. A 0 will appear in the burner display.
Select the desired setting between 1 and 12 by touching the - or +
touch controls.
Note
Ensure only one control is touched at a time or the cooktop may not
respond.
When the cooktop is turned on the auto heat option can be selected
by performing the following:
To cook using “auto heat”:
Press the + control
To Cook without “auto heat”:
Press the – control
3.3.4
Auto Heat Setting
When auto heat is activated, the selected burner turns on
automatically to the highest setting to bring the burner up to
temperature. The burner then changes to the cooking setting
selected by the user. The "heat-up" time depends on the cooking
setting chosen.
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3.3.5
Touch Controls – Automatic Reset
The cooktop automatically resets:
after a power failure
in response to changing light conditions – see note below.
Note
Should the cooktop be installed in an environment that is brightly lit,
or completely shaded; the touch controls may not function properly.
3.3.6
Touch Controls – Manual Reset
1. Shut off power to the appliance (i.e. turn circuit breaker off).
2. Wait at least one (1) minute.
3. Restore the power to the appliance.
3.3.7
Residual heat indicator
After the burners or the cooktop have been turned off, the residual
heat of the burners which may still be hot are indicated by an in
the display.
The
in the display goes out when the burners are safe to touch.
Service Tip
If the power supplied to the appliance is interrupted (i.e. breaker
shut off, power outage…) the residual heat indicators will flash
when power is restored.
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3.3.8
Safety Lock
The Safety Lock can be activated; to prevent children or pets from
turning on the burners or changing the settings. The safety lock can
be activated as follows:
If activated when the appliance is off - then the appliance
cannot be turned on
If activated while the appliance is in use, then: the safety lock is
activated when the
The settings for the burners and for the timer
cannot be altered.
The burners and cooktop can still be turned off
but once turned off cannot be turned on again.
To activate the safety lock:
Touch the
until the indicator lights. (The indicator will go out
after a short period of time).
If you touch the control for the safety lock or try to select a setting
the light will come on again to show that the child safety lock has
been activated.
To deactivate the safety lock:
Touch the
until the indicator goes out.
Note
If the power supplied to the appliance is interrupted (i.e. breaker
shut off, power outage…) the safety lock will be deactivated.
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4.0
Description of Function
4.1
Electric Cooktops – General Information
4.1.1
Temperature Limiters – Electric Cooktops
Each burner is equipped with a temperature limiter that turns off the
heating element(s) before the ceramic surface become too hot.
Once the surface cools to a safe temperature, the heating
element(s) automatically turn back on.
The overheating protection may activated when:
Turning on a burner without putting a pan on it.
Heating an empty pan.
Pan / pot is not sitting evenly on the burner.
The pan is not conducting heat properly.
If the heating elements cycle on and off, even at the highest setting,
the overheat protection has been activated.
4.1.2
KM452 Safety Cut-Out - Controls are Covered
The cooktop will turn off automatically if any of the touch controls
are covered for more than 10 seconds, for example by finger
contact, food boiling over, or by an object such as an oven mitt or
towel.
When the cooktop turns itself off a tone will sound every 30
seconds (for a maximum of 10 minutes) and an F will flash
in the display of the touch control which was covered.
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4.1.3
KM 452 Safety Cut-Out Feature
The KM452 is equipped with a safety cut-out feature. In the event
one of the burners is left on for an unusually long period of time
without any control adjustments; the cooktop automatically turns off
and illuminates the residual heat indicator. Refer to table 4-1 for
specific operating durations.
Table 4-1: Safety Cut-Out Setting and Operating Hours
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4.1.4
KM452 Touch Controls - Resetting
4.1.4.1
Automatic Reset
The cooktop automatically resets:
after a power failure
in response to changing light conditions – see note below.
Note
If the cooktop be installed in an environment that is brightly lit, or
completely shaded; the touch controls may not function properly.
4.1.4.2
Manual Reset
1. Shut off power to the appliance (i.e. turn circuit breaker off).
2. Wait at least one (1) minute.
3. Restore the power to the appliance.
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4.2
Electric Cooktops - Components
4.2.1
Regulator
On electric burner Combi-Sets user adjustable Regulators are used
to control the power to the Heater Element. The power is regulated
by the user via the adjustable control knobs.
On the KM452 the regulator system is integrated into the electronic.
4.2.2
Temperature Monitor
The Temperature Monitor; mounted (horizontally) across each
Heater Element is responsible for monitoring the temperature at the
Heater Element. Signals are provided to the Regulator to control
the power to the Heater Element.
4.2.3
Operational Indicator
The Operational Indicator illuminates when the appliance is
switched on for usage.
4.2.4
Residual Heat Indicator(s)
The Residual Heat Indicator illuminates when the appliance
reaches a specific temperature alerting the user the cooktop
surface is hot. Even if the appliance is switched off; the indicator(s)
remains illuminated until the appliance cools down.
4.2.5
Heater Elements
The Heater Elements are powered by 240VAC. The element
assemblies are designed to disperse heat only toward the cooking
surfaces. If the appliance is converted to operate at a lower voltage
(i.e. 208 VAC) a decal indicating the same, should be affixed to the
appliance near the data plate. Under no circumstances should a
lower voltage unit be connected to higher voltages.
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MasterChef Collection Cooktops
Technical Information
4.3
Gas Cooktops
4.3.1
Operational Overview of Ignition / Re-Ignition System
Refer to figure 4-1
When the user turns on a burner the following actions occur:
The Mechanical Gas Regulator (Item 2) opens when the control
knob is pressed down.
The Ignition Switch (Item 1) is closed when the control knob is
turned to the 9 o’clock position. This allows power to be
provided to Electronic (Item 7) and the Transformer (Item 8).
The Electronic (Item 7) provides approximately 8 millivolts to the
activate the Thermocouple Solenoid (Item 3) for approximately 6-10
seconds to allow gas flow to the burner.
At the same time, the Transformer (Item 8) sends voltage to the
Ignition Electrodes (Item 4) to ignite the gas at the Burner (Item 5).
Once the Burner (Item 5) is lit, the Thermocouple (Item 6) is heated
and produces approximately 6-8 millivolts. The power from the
Thermocouple (Item 6) is monitored by the Electronic (Item 7) and
keeps the Thermocouple Solenoid (Item 3) open permitting gas
flow to the Burner (Item 5).
Should the Burner (Item 5) be extinguished (example: by wind) the
Thermocouple (Item 6) begins to cool down and the voltage being
produced drops. The Electronic (Item 7) detects the drop in power
and triggers the Transformer (Item 8) to spark the Ignition
Electrodes (Item 4) to re-ignite the gas. The Thermocouple (Item 6)
heats up producing 6-8 millivolts and the appliance resumes regular
operation.
In the event that the gas does not re-ignite (i.e. a defective or
contaminated Ignition Electrode (Item 4) the Thermocouple (Item 6)
continues cooling and dropping in power. Eventually the drop in
power can no longer keep the Thermocouple Solenoid (Item 3)
energized; this shuts off the gas supply to the burner (regardless of
the position of the Mechanical Regulator) (Item 2).
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MasterChef Collection Cooktops
Technical Information
1
2
3
4
5
6
7
8
----
Ignition Switch
Mechanical Gas Regulator
Thermocouple Solenoid
Ignition Electrode
Burner Assembly
Thermocouple
Electronic
Transformer
Control Voltage
Figure 4-1: Ignition / Re-Ignition System
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Technical Information
Figure 4-2: Re-Ignition / Control System Data
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MasterChef Collection Cooktops
Technical Information
4.3.2
Burner Gas Regulators
Each burner is user controlled via a mechanical Gas Regulator.
Each Regulator contains a connection port for the Thermocouple
Solenoid, that works with the Ignition / Re-Ignition System (see
4.3.1).
Even if the user control is placed into the fully open position no gas
can flow from the Regulator unless the Thermocouple Solenoid is
energized (in the open position).
4.3.3
Connecting to LP Gas
The KM342 and KM344 is ordered specific for the type of gas
supply being used - field conversion is not possible.
4.3.4
Burner Assemblies
4.3.4.1
Normal and Fast Burner Assembly
1. Burner Cap
2. Burner Base
Figure 4-3: KM342 & KM344 Normal / High Speed Burner Components
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4.3.4.2
Super Burner Assembly
1.
2.
3.
4.
5.
Burner Cap
Upper Burner Head
Burner Ring
Lower Burner Head
Burner Base
Figure 4-4: KM342 & KM344 Wok Burner Components
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5.0
Service and Maintenance
Warning!
Service and repair work should only be performed by qualified
personnel; in accordance with applicable regulations.
The appliance must be disconnected from the main power
supply (i.e. unplugged, circuit breaker shut off) before any
service work is performed.
The gas supply to the appliance must be shut off before
performing any service on the KM342 and KM344.
After service all gas connections should be checked to ensure
they do not leak. Repair as necessary before any operation.
Where applicable by law, gas connections must be performed
by qualified / licensed personnel.
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5.1
Removing Cooktop for Service
Should the internal components of the cooktop require service, the
Cooktop must be removed.
Removal Procedure
Refer to Figure 5-1.
1. Shut off the electrical supply to the appliance (i.e. shut off the
circuit breaker). Turn off the gas supply (if applicable)
2. Disconnect the electrical supply. Disconnect the gas (if
applicable).
3. Access the underside of the appliance.
4. Press inward on the retaining clips (1) while pushing the
appliance upward (2)
Figure 5-1: Removing the Cooktop for Service
Note:
During re-installation all gas connections must be leaked tested
before reconnecting the electric supply.
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6.0
Fault Diagnosis
6.0.1
Fault Diagnosis - Gas
Flame Not Igniting
Check for:
Dirty burner head parts / Parts not seated correctly
Dirty Ignition Electrode / Faulty Ignition Electrode
Appliance is damp (spark current grounding within the unit)
Faulty Transformer
Faulty Ignition Switch
Incorrect type of gas supply.
The Flame Goes Out When Using A Low Setting
Dirty burner head parts
Uneven / Flickering Flame
Dirty burner head parts / parts not seated correctly
Gas pressure not in specification
Faulty Gas Regulator
Unusual Color Flames
Dirty burner head parts
Contaminated Gas Supply
Flame not visible around the entire burner or uneven flames
Parts not seated correctly
Dirty Burner Components – carefully inspect all holes in burner
ring for contamination (i.e. food residues)
Flame Continuously Goes Out about 30 seconds after Igniting
Dirty burner head parts. / Parts not seated correctly
Dirty, damaged or defective Thermocouple
Loose connections with the Thermocouple circuit
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6.0.2
Fault Diagnosis - Electric
Appliance Inoperative – New Installation
Ensure appliance is correctly connected to the electrical supply.
Ensure the electric supply matches the requirements of the
appliance.
is Displayed While the Cooktop is Off (KM352)
The Residual Heat Indicator is indicating that a burner is still
hot. Allow the Appliance to cool.
F
is Displayed While the Cooktop is Off (KM352)
The cooktop controls Controls are Covered
The cooktop will turn off automatically if any of the touch
controls are covered for more than 10 seconds, for example by
finger contact, food boiling over, or by an object such as an
oven mitt or towel.
When the cooktop turns itself off a tone will sound every 30
seconds (for a maximum of 10 minutes) and an F will flash
in the display of the touch control which was covered. 4.1.2
KM452 – Cannot be operated
After intensive cleaning, the appliance cannot be operated for a
period of 3 to 4 hours. After this time has elapsed or after
switching the supply power off the appliance can be operated
without any limitations.
Numerous movements during may be detected by the electronic
during extensive cleaning. This excessive data can cause an
inoperative condition for about 3 to 4 hours.
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