AccuTemp Evolution Bedienungsanleitung
ACCUTEMP PRODUCTS INC
8415 N. CLINTON PARK DR, FORT WAYNE, IN 46825 - 800 480-0415 - www.accutemp.net
EVOLUTION
ELECTRIC
SERVICE MANUAL
SP8026-1909 EVOLUTION ELECTRIC STEAMER 2
REVISION SHEET
Current Revision: 1909 Prior Revision:1203
Date: 09/18/2019 Date: 03/31/2012
Change:
Revision and update
1. Exceeding the temperature limits can cause nuisance lockouts and premature
electrode failure.
2. Alteration to Cast Heater Replacement and Removal instructions
3. Updated Troubleshooting flowchart.
SP8026-1909 EVOLUTION ELECTRIC STEAMER 3
TABLE OF CONTENTS
Warnings and Cautions
1.0 Sequence of Operation
1.1 Water Level System
1.2 Heat Generation
1.3 Temperature Sensor and Control
board
2.0 Main Component Information
3.0 Troubleshooting Flowchart
3.1 Troubleshooting Table
3.2 Troubleshooting Notes
3.3 Modifying Control Settings
3.4 Location of Electrical Components
3.6 Recommended Tools
4.0 Removal and Replacement of
Components
4.1 R&R of Supply Power Components
4.2 R&R of Water Level Control
Components
4.3 R&R of Heat Control Components
4.4 R&R of Cast Heater
4.5 R&R of Door Assembly
4.6 R&R of Temperature Sensors
4.7 Steam Vent Components
5.0 Wiring Schematics
5.1 Wiring Schematic for SN 36980
and Below
5.2 Wiring Schematic for SN 36981
and Above
4
7
7
8
9
10
13
14
25
26
28
29
30
32
36
38
43
47
48
50
51
SP8026-1909 EVOLUTION ELECTRIC STEAMER 4
WARNING SYMBOL DEFINITIONS
SYMBOL DEFINITIONS
Symbols are used to attract your attention to possible dangers. They are only
eective if the operator uses proper accident prevention measures. Some of the
symbols are boxed text; while others maybe just picture icons. Please give this
information the respect they deserve for safe operation.
Symbol Icons
Below are definitions of the symbol icons used
in this manual.
CAUTION -
HOT SURFACE
DANGEROUS
VOLTAGE
EARTH GROUND
DANGER
Indicates an imminently hazardous
situation; which, if unchanged, will result
in death or serious injury.
CAUTION
Indicates a potentially hazardous
situation; which, if unchanged, will
result in minor or moderate injury.
NOTE
Advises the reader of information
or instructions, vital to the
operation or maintenance of the
equipment.
SP8026-1909 EVOLUTION ELECTRIC STEAMER 5
ELECTRICAL SHOCK HAZARD WHILE WORKING ON
ENERGIZED EQUIPMENT.
Unplug equipment prior to removing any components eected by electricity.
BURN HAZARD WHILE WORKING ON STEAM PRODUCING
EQUIPMENT.
When accessing the cooking chamber, be sure to always stand back while slowing
opening the door to allow the chamber to vent o the steam. Never reach into the cooking
chamber before it has completely vented o the steam.
Never reach into the cooking chamber or handle hot items without wearing the proper
heat protective gloves. Steam coming out of the holes on the right side of the cooking
chamber is invisible and can cause severe burns.
Water inside the steam chamber, creating steam, has a temperature of 212°F and will cause
burns if touched or spilled on the skin.
PERSONNEL INJURY HAZARD WHILE PICKING UP OR
MOVING HEAVY EQUIPMENT.
Always use 2 people and proper lifting techniques when picking-up, moving, or inverting
heavy equipment.
SLIP & FALL HAZARD WHILE WORKING ON WATER HOLDING
EQUIPMENT.
Keep the floor in front of the equipment clean and dry. If spills occur, clean them up
immediately to avoid potential injuries.
DANGER
SAFETY PRECAUTIONS
SP8026-1909 EVOLUTION ELECTRIC STEAMER 6
WARNING & CAUTION NOTES
• DO NOT use abrasive or steel materials, such as wire brushes or metal
scouring pads to clean the Water Sensors.
• DO NOT manually fill water above the Water Level Mark on the left side of
steam chamber above the High Limit Level Sensor (connection-less only).
CAUTION
ONLY QUALIFIED SERVICE TECHNICIANS
SHOULD PERFORM MAINTENANCE ON THIS
EQUIPMENT.
WARNING
SP8026-1909 EVOLUTION ELECTRIC STEAMER 7
1.0 Sequence of Operation
1.1 WATER LEVEL SYSTEM &
INDICATOR LIGHTS:
PWR Button Pushed & Water Level Is
Below the Low Water Level Sensor -
AUTO-FILL
• The Low Water Light Indicator will
be lit.
• PRE is displayed on the Control/
Keypad Board.
• The Water Sensor Board sends a
signal to the Water Sensor Board’s
K1 Relay to open the Auto-Fill Valve
and start filling the steam chamber
with water.
• The red LED light on the Water
Sensor Board will be flashing
continuously.
PWR Button Pushed & Water Level Is
Below the Low Water Level Sensor -
MANUAL FILL
• The Low Water Light Indicator will
be ON and Alarm will sound.
• PRE is displayed on the Control/
Keypad Board.
• The red LED light on the Water
Sensor Board will be flashing
continuously.
PWR Button Pushed & Low Water
Level Sensor Is Satisfied - MANUAL &
AUTO-FILL
• The Low Water Light Indicator and
Alarm (only manual fill units use an
alarm for low water condition), will
be OFF.
• This is the minimum water level
needed for the contactor to close and
turn the Cast Heater ON.
• The red LED light on the Water Sensor
Board will have about a 1 second flash
delay.
Water Level Is At the High Limit Water
Level Sensor - AUTO-FILL
• When the water level in the chamber
touches the High Water Limit Probe,
the Water Sensor Board will continue
to activate the Auto-Fill Valve for an
additional 30 seconds; and then turns
the valve o. (This will occur every
time the water level falls below the
High Limit Probe).
• The red LED light on the Water Sensor
Board will have about a 2 second flash
delay.
SP8026-1909 EVOLUTION ELECTRIC STEAMER 8
1.2 HEAT GENERATION:
Power Cord Plugged-In & PWR Button
Not Pushed
• Line Voltage comes into the 3
Pole Contactor’s L1 - L3 terminals.
(Refer to the unit’s specific
wiring schematics to determine the
wire color to “L” Terminal location.)
• Line Voltage is then taken o of L1
& L2 of the Contactor and applied
to the Transformer, which steps-
down the Line Voltage to 24VAC.
• From the two, 1.25Amp, fuses;
power goes through the Overtemp
Switch, then goes to the Water
Sensor Board, to Control Relay
#1 (CR#1) coil, to the High Water
Overfill Reed Switch (Auto-Fill
Only), to the Control/Keypad Board,
and to Pin 6 of CR#1. Power also
flows through CR#1, Control/
Keypad Board, Water Sensor Board
and Contactor (once the water
level condition is met).
• (The red LED light on the Water
Sensor Board will be flashing
continuously.)
PWR Button Pushed & Low Water
Level Sensor Is Satisfied
• (The red LED light on the Water
Sensor Board will have about a 1
second flash rate.)
• The Water Sensor Control Board’s
K2 Relay will close, sending power
to the Contactor’s coil; closing the
contacts and allowing Line Voltage
to be sent to the normally open
Solid State Relay(s).
Water Level Is Filled Too High in the
Steam Chamber - AUTO-FILL
• The Float Ball rises on the Over-Fill
Reed Switch sensor peg until the
magnetic field from the Float Ball is
above the Reed Switch, causing the
Reed Switch to open. This causes
the Control Relay #1 AC coil’s voltage
to drop, dis-engaging the relay from
the steamer’s normal operation;
illuminating the High Water (Over-
Fill) Indicator Lamp and sounding the
buzzer.
• The loss of Control Relay #1 will
remove the power signal to the
Contactors control coil, which opens
the contacts and prevents Line Voltage
to the Solid State Relay(s). This stops
the Cast Heater from generating heat.
• (To restart the steamer, open the Drain
Valve to drain the water, until the High
Water (Over-Fill) Indicator Light goes
out. Press the PWR button ON to
restart the start-up procedure.)
SP8026-1909 EVOLUTION ELECTRIC STEAMER 9
• The Control/Keypad Board will send
a 24VAC signal to the Solid State
Relay(s); closing the Relay(s) (as long
as the Door Switch and the Chamber
Pressure Switch are closed).
• The Solid State Relay(s) then pass
Line Voltage to the Cast Heater’s
Elements generating heat evenly over
the bottom of the steam chamber;
creating steam for cooking.
1.3 TEMPERATURE SENSOR RTD AND
CONTROL/KEYPAD BOARD
• As the water temperature rises, the
RTD will provide a signal, based on
the resistance of the sensor, to the
Control/Keypad Board to provide a
digital temperature display.
• Control Panel will show PRE (Preheat)
on initial start-up until the steam
chamber reaches 195°F, then COO
(Cook) will be displayed between 195°F
and 212°F.
• The operating default mode on initial
PWR ON is COOK mode; which
automatically causes the steamer to
go to the normal operating boiling
point, which is 212°F at sea level.
• In COOK mode, the 24VAC output
from the Control/Keypad Board is
continuously on, so that the unit’s
temperature is controlled by the
Chamber Pressure Switch, which
opens at 1/2 inch of water column or
higher.
• In HOLD mode (HLD), the steamer’s
regulated temperature will change
to the HOLD temperature’s preset
value. The Control/Keypad Board
will regulate temperature via the
RTD input, based on the current
HOLD mode preset value. (This
value can be changed using the
program function on the Control/
Keyboard Control.)
SP8026-1909 EVOLUTION ELECTRIC STEAMER 10
2.0 Main Component Information
Component Part # Purpose
Transformer
Assembly
Part#
AT0A-5076-1
(below SN
52865)
AT0E-2662-7
SN 52866
onwards)
• Steps-down the Supply Line Voltage to 24 -28VAC.
Overtemp Switch
(Thermal Limit
SW3)
AT1E-2653-3
12kW & lower
AT1E-2653-4
13kW & above
• Normally closed switch that provides a safety feature to the
machine in case the Element overheats.
• If the Element overheats, the switch will open and turn the steamer
o; while lighting the red LED Overtemp Light on the Control
Panel.
• The steamer will not turn on until the temperature has dropped
enough to allow the Overtemp Switch to close again.
Control / Keypad
Board
AT0E-3625-
1-RXX (XX is
software revi-
sion)
• Human interface for steamer operations through push-buttons,
operations, & display readouts.
• Provides power to the Solid State Relays
• Receives input from the Temperature (RTD) Sensor and displays the
water temperature on the LED readout.
• Maintains the preset HOLD temperature.
Water Sensor
Control Board AT0E-3230-2
• Receives inputs from Water Sensor Probes and implements
corresponding actions for those inputs based on the water level in
the steam chamber.
• Controls the Auto-Fill Valve (if installed) and receives inputs that
provides actions for the desired water level needs.
Water Sensor
Probe AT1E-2652-1
• Teflon exterior with a stainless steel center that uses the minerals in
the water to complete the electrical circuit to the Water Board.
• MUST BE CLEAN TO WORK PROPERLY.
Low Water Level
Probe
• Once the Low Water Sensor is satisfied, it will allow the Main
Contactor to activate.
• If the water level is below the sensor, the Water Board will activate
the Auto-Fill Valve (if installed) filling the unit the water until the
High Limit Water Sensor is satisfied.
High Limit
Water Level
Probe
• On initial chamber water fill, once the water level reaches and
satisfies the Operational Water Sensor, the Water Board will keep
the Auto-Fill Valve open for 30 additional seconds..
• After initial chamber water fill, when the water level drops below
the sensor’s operational level; the Water Board will open the Auto-
Fill Valve for 30 seconds to raise the water level back above the
High Limit Water Sensor.
• This process will repeat as long as the water level stays above the
Low Water Sensor.
Inhaltsverzeichnis
Andere AccuTemp Küchengerät Handbücher
