THE STEAM GENERATOR IN THIS UNIT REQUIRES PERIODIC MAINTENANCE.
FAILURE TO PERFORM THE REQUIRED MAINTENANCE (BASED ON WATER
QUALITY AT THE INSTALLATION AND VERIFIED BY MAINTENANCE RECORDS)
WILL RESULT IN THE CANCELLATION OF WARRANTY COVERAGE ON THE
STEAM GENERATOR.
WATER QUALITY REQUIREMENTS
THE RECOMMENDED MINIMUM WATER QUALITY STANDARDS WHETHER
UNTREATED OR PRE-TREATED, BASED UPON 10 HOURS OF USE PER DAY, AND
A DAILY BLOWDOWN, ARE AS FOLLOWS:
TOTAL DISSOLVED SOLID
less than 60 parts per million
TOTAL ALKALINITY
less than 20 parts per million
SlLICA
less than 13 parts per million
pH FACTOR
greater than 7.5
CONSULT A LOCAL WATER TREATMENT SPECIALIST FOR AN ON SITE WATER
ANALYSIS AND THIER RECOMMENDATIONS CONCERNING STEAM GENERATOR
FEED WATER TREATMENT (IF REQUIRED), IN ORDER TO REMOVE OR REDUCE
HARMFUL CONCENTRATIONS OF MINERALS. THE USE OF HIGHLY MINERALIZED
WATER WILL MEAN THAT MORE FREQUENT SERVICING OF THE STEAM
GENERATOR WILL BE NECESSARY. THE FACT THAT A WATER SUPPLY IS
POTABLE IS NOT PROOF THAT IT WILL BE SUITABLE FOR THE GENERATOR.
Page 3
TABLE OF CONTENTS
INSPECTION AND UNPACKING
INSTALLATION INSTRUCTIONS
Installation Policies 3
Basic Assembly 3 - 5
Installation Clearances 5
Service Connections 6
Electrical 6 - 7
Water 7
Recommended Plumbing 7 - 11
Water Quality Requirements 7
Drain 12
Start-Up and Check-Out 13
INTRODUCTION TO SteamCraft® III
Operational Safety 13
OPERATIONAL FUNCTIONS
Control Panel Overview 14
Setting Digital Time Display 14
"TIMED" -Mode14
"MANUAL" Mode 15
Special Notes About Control Pane! 15
Thermostatic Timer Compensation 15
PAGE
3
3 -12
13
14 -15
UNIT FUNCTIONAL TEST
Before S/N C 1613-88A-24 (with Thermistors) 15 - 17
After S/N C 1613-88A-23 (without Thermistors) 18 - 20
START-UP AND PREHEAT
STEAMING OPERATION
STEAMER TIMER SETTING GUIDE
PREVENTATIVE MAINTENANCE
CHEMICAL DESCALING INSTRUCTIONS
21 - 22
22 - 23
20
20
21
Page 4
ELECTRICAL CIRCUITRY OVERVIEW 24
PRIMARY CIRCUITS
Testing of Heating Element s25
120 VACCIRCUITS
Water FBI Solenoid Valve 26
Condenser Water Solenoid Valve 26
Contactors: Front - 3-Pole (before S/N C 1613-88A-24) 26
4-Pote (after S/N C 1613-88A-23) 26
Rear- 3-Pole (before S/N C 1613-88A-24) 26
LOW VOLTAGE CIRCUITS AND CONTROL BOARD
Door Sensor 27
Membrane Switch 30
Compartment Temperature Switch 30
26
27-29
WATER LAVEL PROBES
General Description 30
Flood Probe 31
Water Level 32
Low Water Level 33
TEMPERATURE CONTROL CIRCUITS
General Description 34
Standby 34
Drain Temperature Adjust 4
Thermistors (on units before S/N C 1613-88A-24) 35
EXPLODED-VIEW ASSEMBLY DRAWINGS and PART IDENTIFICATION
Steam Generator. On units before S/N C 2937-88F-14 36
On units after S/N C 2937-88F-13 37
On units after S/N C 5080-88J-00 38-41
Heating Element s42-43
Probes 44-47
Water Inlet to Steam Generator
On units before S/N C 2937-88F-14 48
On units after S/N C 2937-88F-13 51
On units after S/N C 5519-88L-16 54
25
Page 5
Water Inlet to Condenser System:
On units before S/N C 2937-88F-14 49
On units after S/N C 2937-88F-13 52
On units after S/N C 5519-88L-16 55
Drainage System: On units before S/N C 2937-88F-14 50
On units after S/N C 2937-88F-13 53
On units after S/N C 5519-88L-16 56
Electrical Components 57
Front Control Panel 58
Compartment Door and Hinge 59
On units after S/N C 6100-89B-27 60
Door Handle Assembly 62
Door Handle Assembly 63
Cold Water Inlet Strainer Assembly 64
MISCELLANEOUS PARTS LIST 65
WIRING DIAGRAMS
66 - 70
MAINTENANCE and REPAIR CENTERS
Page 6
Page 3
INSPECTION
Before unpacking, visually inspect the shipping carton for evidence of any damage during shipment If there are
signs of possible damage, do not unpack the equipment. Notify the carrier that delivered the shipment so the canon
and its contents can be examined for any damage claims. Fill out all appropriate forms and have the examining
carrier sign and date each form. Do not install damaged equipment
UNPACKING
1. If the shipping carton has no signs of possible damage, unpack the equipment To remove the unit from the
carton, it is easiest to slit the canon in 4 comers and "peel" it away from the steamer. After removing the canon,
examine the steamer for signs of possible damage. If damage exists, detail your observations on a claims form
and give to the shipper (keep a copy for your records).
2. If the equipment is undamaged, lift the unit to the counter top OF stand where it is to be installed. Do not install
damaged equipment
INSTALLATION INSTRUCTIONS
WARNINGInstallation of this unit mas t be done by qualified plumbing and electrical! installation
personnel working to all applicable local and national codes. The equipment is to be
installed to comply with the Basic Plumbing Code of the Building Officials and Code
Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of
the Food and Drug Administration (FDA). Improper installation of this product could
cause injury or damage and void customer warranty.
INSTALLATION POLICIES:
• Cleveland Range equipment is designed and manufactured to comply with applicable standards
tuners. Included among those certification agencies which have approved the safety of the equipment design
and construction are: UL, NSF, CSA, and others.
• Cleveland Range equipment is designed and certified for safe operation only when permanently installed in
accordance with local and/or national codes. Many local codes exist, and it is the responsibility of the owner
and installer to comply with these codes.
• In no event shall Cleveland Range assume any liability damage or injury resulting from installation which are
not in strict compliance with our Installation Instructions. Specifically. Cleveland Range will not
assume any liability for damage or injury resulting from improper installat ion of equipment, including, but not
limited to temporary or mobile installations.
BASIC ASSEMBLY:
1. The four legs have adjustable feet and should be used to level the unit in both directions: front to rear and side
to side. It is important for good operation that the unit is level.
2. Open steamer door and remove package of operational pans. It will contain:
3. Pre-Assembled Parts. When the operating pans
package is removed, several pre-assembled parts
can be seen inside the unit. Do not attempt to
remove these parts.
(d) water level probes
(e) heating elements
(f) compartment drain screen
4. Install Drain Stopper (Before S/N C3991-88I-01).
With steamer door open, notice the opening in the
bottom of the compartment. This leads into the
Steam Generator. Inside the Steam Generator
about midway along the left -hand side, you will
find a square shaped fixture with a drilled hole on
top and another on the right side. This is the
Steam Generator drain. Place the Drain Stopper
vertically as shown. Make sure it seats firmly.
5. Install the Steam Generator Cover. This cover is
designed to be installed in only one way. Refer to
illustration (b) in Step 2 above. Using both hands,
lift and locat e the cover above the Steam
Generator opening. Lower the cover until it fits
firmly into place.
6. Install the Pan Slide Racks. Each slide rack has 4
'loops' which are designed to loop-over' the
stainless steel hanger pins pre-mounted on each
compartment wall Position the 2 upper loops on
the 2 upper hanger pins. Let go. Now place your
hand on bottom of slide rack and gently move the
slide rack upward, allowing top of slide rack to
lean against compartment wall Bottom loops will
easily 'loop-over' bottom hanger pins, Slide rack is
now in position. Pans will slide easily on property
installed slide racks.
7. Check to insure that the Compartment Drain
Screen is free of debris. It is in the left rear comer
of the compartment floor.
Page 8
Page 5
The 40 - MESH STRAINER and 1/4" Brass NIPPLE (P/N
102383) are preassembled and ready for quick installation
into the 1/4"" Bulkhead Coupling (see COLD WATER INLET)
located on the lower, right rear of the steamer.
Apply Pipe Dope or Teflon Tape to the 1/4"Brass Nipple.
Turn the 1/4" Brass Nipple (and Strainer) into the 1/4"
Bulkhead Coupling. Using a Pipe Wrench, turn the Strainer,
so that the 1/4" Brass Nipple is snug in the 1/4" Bulkhead
Coupling (Cold Water Inlet) and the Strainer is in a vertical
position as shown (with nut in downward position).
Then flush the Cold Water Inlet line (to be provided by the
installer) before connecting it to the Strainer. Be sure to check
.for any leakage and adjust accordingly.
9. Drain Valve Location and Operation.
The Drain Valve is located in the rear left comer, underneath the steamer. When the red handle is turned toward
the front of the unit the drain valve is open. (see illustration below) A 90° turn to the right will dose the valve.
INSTALLATION CLEARANCES:
The steamer should be installed with the following clearances:
• Left = 2"
• Right = 2"
• Top = 2"
• Bottom =4" (4" legs already mounted to unit)
Page 9
Page 6 CET-8 Service Manual
SERVICE CONNECTIONS:
(A) Hole for electrical conduit connection leads to terminal block and
ground connection inside unit. On C.S.A. (Canadian Standards
Association) units 6 feet of flexible electrical conduit is already
attached to the unit for the electrical supply connection.
(B) 1/4" 0 COLD WATER INLET for Steam Generator feed water.
(On units before S/N C 5519-88L-17)
(B) Location for SteamerGard Water Treatment System.
Installation Optional. (On units after S/N C 5519-88L-16)
(C) 1/4" 0 COLD WATER INLET for Condenser feed water.
(On units before S/N C 5519-88L-17)
(C) 1/4" diameter COLD WATER INLET for Steam Generator (Boiler)
feed water and Cold Water Condenser. (On units after S/N C 551988L-16)
(D) Drain (On units after S/N C 2937-88F-13)
ELECTRICAL:
1. Install in accordance with local codes and/or the National Electric Code, ANSINFPA No. 70-1987 (USA) or the
Canadian Electrical Code CSA Standard C22.1 (Canada). A separate fused disconnect switch must be installed
for each unit. The steamer must be electrically grounded by the installer.
2. The electric supply must match the power requirements specified on the steamer's rating label. The copper wiring
must be sized to carry the required current at the rated voltage. See table below.
VOLTS
KW 3PH AMPS SIZE (AWG) 1PH AMPS SIZE (AWG)
208
220
240
380
415
460
480
8.1
7.4
8.8
7.4
8.8
7.4
8.8
23
20
22
12
13
10
11
10
10
10
12
12
14
14
39 8
34 8
37 8
20 10
22 10
18 12
18 12
NOTE: Use copper wire suitable for not les s than 75° C
3. Locate the six (6) screws that hold the rear panel to steamer and
remove them. (Save to use again.) Remove rear panel, expos ing
the terminal block on bottom panel of unit. Connect with properly
sized copper wire. On C.S.A. units 6 feet of flexible conduit is
already attached to the terminal block for the electrical supply
connection
Page 10
CET-8 Service Manual Page 7
4. The steamer is wired 3-phase delta operation at the factory. For single phase operation, the installer must change the two
jumpers on the terminal block to that shown in the accompanying diagram (and on the steamer's wiring diagram label).
5. The steamer will be wired 3 phase WYE connection at the factory. For steamers ordered for 380/220 V or 415/240 V, 4 wire 3
phase.
WATER
A 1/4" l.P.S. (M1N. SIZE) COLD water line is required. DO NOT USE HOT WATER. Minimum water pressure
(dynamic) is 35 psi (2.4 kg/cm), the maximum static water pressure is 60 psi (4.1 kg/cm).
Water Quality Requirements
If the purity of the incoming water is good, the generator, the heating element and the valves should give years
of trouble-free, efficient service with a minimum of servicing.
The recommended minimum water quality standards, whether untreated or pretreated. for the Steam Generator
are as follows:
• TOTAL DISSOLVED SOLIDS less than GO parts per million • SILICA less than 13 parts per million
• TOTAL ALKALINITY less than 20 pans per million • pH FACTOR greater than 7.5
Consult a local water treatment specialist for an on-the-premises water analysis and for recommendations
concerning steam generator feed water treatment (if required), in order to remove or reduce harmful
concentrations of minerals. The use of a poor quality (highly mineralized) water will mean that more frequent
servicing of water sensitive components will be necessary. The fact that a water supply is potable is not proof
enough that it will not be detrimental to the water sensitive components.
Recommended Plumbing
• On units (before S/N C 5519-88L-17) the steamer has two Cold Water Inlet Fittings at the lower right -hand
side of the rear panel. The fitting on the left feeds the Cold Water Inlet to the Steam Generator (See figures
13 and 16) and the one on the right feeds the Cold Water Condenser System. (See figures 14 and 17)
Decals mark the respective fittings. When using treated water, only the Cold Water Inlet to the Steam
Generator need be connected to the treater; the Cold Water Condenser System can use untreated water.
• On units (after S/N C 5519-88L-16) the steamer has one Cold Water Inlet Fitting at the lower right -hand side
of the rear panel (See illustration on page 5). When using a Water Treatment System, the connection for the
Steam Generator (Boiler) is made through the optional hole provided. This process will also require additional parts. The Cold Water Condenser System can use untreated water. (See illus tration on page 11). NOTE:
See rear view drawing in "Service Connections, "B & C (page 6).
Page 11
page 8 CET-8 Service Manual
Recommended Plumbing (Continued)
NOTE: This water supply arrangement is used on
units before S/N CS519-88L-17.
TOP VIEW
Page 12
Recommended Plumbing (Continued)
NOTE: This water supply arrangement is used on
units before S/N C5519-88L-17.
CET-8 Service Manual Page 9
TOP VIEW
RECOMMENDED PLUMBING
WATER
TREATMENT
SYSTEM:
Page 13
Page 10 CET-8 Service Manual
Recommended Plumbing (Continued)
NOTE: This water supply arrangement is used
on units before S/N C5519-88L-16.
REAR VIEW
TOP VIEW
Page 14
Recommended Plumbing (Continued)
CET-8 Service Manual Page 11
NOTES:
1. This water supply arrangement is used on units
after S/N C5519-88L-16.
2. The conversion kit for converting one incoming
water line into two for a treatment system is P/N
102431.
WATER TREATMENT SYSTEM
RECOMMEMDED PLUMBING
( to be supplied by installers)
WATER
TREATMENT
SYSTEM:
Page 15
Page 12 CET-6 Service Manual
Drain
This drain line outlet discharges exhaust steam and hot condensate. Connect 1-1/4" I.P.S. piping (or larger) to
extend the drain line to a nearby open floor drain. Up to two elbows and six feet of 1-1/4" I.P.S. (or larger)
extension pipe should be connected to the drain termination. Drain piping extended six to twelve feet. or using
three elbows, should be increased to 2" I.P.S. - DO NOT, UNDER AN CIRCUMSTANCE, CONNECT ANY OTHER EQUIPMENT DRAIN TO THIS DRAIN LINE. The extension piping must have a gravity flow and vent
freely into the air. This drain outlet must be free vented to avoid the creation of back pressure in the steamer
cooking compartments.
To ensure a vented drain line, DO NOT, UNDER ANY CIRCUMSTANCE, CONNECT THE DRAIN
OUTLET DIRECTLY TO THE FLOOR DRAIN OR SEWER LINE.
Do not run the drain fine discharge into PVC drain piping or any other drain material not capable of sustaining
180°F operation. The equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials
and Code Administrators International, Inc: (BOCA) and the Food Service Sanitation Manual of the Food and Drug
Administration (FDA).
In making a connection to the dram termination use a hardening type of pipe sealant. FINGER TIGHTEN ONLY -
DO NOT USE A WRENCH.
FAILURE TO OBSERVE THESE REQUIREMENTS CAN RESULT IN DAMAGE TO EQUIPMENT AND/OR THE
POSSIBILTY OF INJURY.
If these instructions are not complied with, there will be steam and water leakage past the
compartment door. Furthermore, the possibility of serious personal injury may result.
Page 16
CET-8 Service Manual Page 13
Start-Up and Check-Out
1. Be sure to put the Steam Generator Cover in its' proper location.
2. Close Drain Valve.
3. Turn on water at supply valve.
4. Turn on electricity at Fused Disconnect Switch.
5. Close steamer door.
6. Press "POWER" touch pad.
7. Set Timer display at "01"minutes.
8. Press "TIMED" touch pad. The unit will HI with water and begin to make steam. After the compartment reaches
operating temperature the timer will count down to "00" and an alarm will beep. This test will take 5 to 10
minutes.
9. Press "MANUAL* touch pad. The Heater Elements and the Cold Water Condenser will turn on. Open and dose
the door several times to ensure that the steam shuts off with the door open.
INTRODUCTION TO
To get the full advantage of steam cooking, the Cleveland SteamCraft III must be properly installed. A steamer
which is improperly installed, improperly used, improperly maintained, or improperly repaired will create a
dangerous condition and may cause injury to personnel.
OPERATIONAL SAFETY
Your Cleveland SteamCraft III will require minimum servicing provided it is operated according to instructions and
given the care recommended.
Make sure that responsible personnel understand how your steam cooking equipment should be operated and
cared for. Proper use and maintenance pay handsome dividends in longer equipment He and satisfactory
performance minimal down-time.
Safe steam cooking equipment operation dictates that every owner should follow these rules for operational safety.
1. Begin a comprehersive, continuous program of steam cooking equipment inspection.
2. Never allow untrained personnel to operate your steam cooking equipment. Establish an in-house training
policy and adhere to ft.
3. At the end of each day's operat ion:
-Shut unit down at the end of each day's operation according to instruction on pages 21 -22.
-Remove any spilled food, then wash the racks and compartment interiors thoroughly with mid detergent in
warm water. Rinse thoroughly with dean warm water. (Racks can be removed and washed in a dishwasher if
desired. To reinstall see Basic Assembly instructions, page 4.)
Let rinse water drain through compartment drain opening. If water does not drain freely,
drain lines must be cleaned out before cooking again. Clogged or slow drains are
dangerous because hot water may spill out when compartment doors are opened during
or after a cooking cycle.
-Before cleaning the steamer's exterior, BE SURE THAT ELECTRICITY TO THE UNIT AT FUSED
DISCONNECT SWITCH IS OFF. Use a damp cloth for cleaning. Never hose down the equipment.
4. Read and follow Cleveland Range instructions on steamer and steam generator maintenance.
5. Use only replacement parts which are factory authorized to preserve the certification of Underwriters
Laboratories, Canadian Standards Association, and all approvals and to protect your warranty coverage.
6. Never allow unqualified personnel to service your steamer.
Page 17
Page 14 CET-8 Service Manual
OPERATIONAL FUNCTIONS
Operation of the Cleveland SteamCraft III is very easy. Each operator should become familiar with the
following operational functions and procedures to effectively start, operate, and shut down the steamer.
CONTROL PANEL OVERVIEW:—————————————————————————————————————
1. "POWER" -ON and OFF touch pad controls the power to unit. The red indicator light above the touch •pad is
illuminated when the power is ON.
2. "MANUAL" -ON and OFF touch pad controls the manual operation. The green indicator light above the touch
pad is illuminated when operating in the manual mode.
3. "TIME SET" -Directional touch pads are used to adjust the time on the DigitaI Time Display located above the
two touch pads. A maximum of 99 minutes can be programmed. The green indicator fight to the
right of the Digital Time Display flashes when the steaming compartment is at steaming
temperature and the time is counting (up or down).
4. "TIMED" -ON and OFF touch pad controls the timed operation. The green indicator light above the touch pad
is illuminated when operating in the TIMED mode.
5. "FLOOD" -FLOOD is a safety signal. POWER to the unit will automatically turn off when the signal
comes on. Refer to the troubleshooting section when displayed.
6. "WATER" -WATER illuminates as the steam generator fills turns off when the water level reaches the
safe operating level.
The touch pad controls are designed to be pressed with finger tips only. Be careful not to use
fingernails, kitchen utensils or anything that could cause damage.
SETTING DIGITAL TIME DISPLAY: —————————————————————————————————————————
————
To set Digital Time Display for TIMED mode, press and hold the "LEFT" touc h pad and the
display will begin counting upward from 01 to 10 slowly, then more quickly. Run the time up until
display is dose to (or over) value wanted, then use the "LEFT" and "RIGHT" touch pads to set
actual time desired. Digital time Display must be reset before each new cooking process can
begin. (Refer to the Steamer Timer Setting Guide on page 21 for suggested settings.)
TIMED MODE: ————————————————————————————————————
If TIMED operation is desired, cooking time must be set on Digital time Display. Begin timed
cooking by pressing "TIMED" touch pad. The green indicator light above the "TIMED" touch
pad will become illuminated. When the unit reaches cooking temperature, the timing sequence
will begin and win be confirmed by a flashing green indicator light to the right of the DIGITAL
TIME DISPLAY. At the conclusion of the timed period, the DIGITAL TIME DISPLAY will flash
00. the green indicator light will go out and a 4 second beeping signal win begin.
Page 18
OPERATIONAL FUNCTIONS (Continued)
MANUAL MODE:
If TIMED operation is NOT desired, unit may be operated in the MANUAL mode by
pressing the "MANUAL" touch pad which turns the steam flow ON and OFF. The green
indicator light above the "MANUAL" touch pad will be illuminated when unit is ON in the
MANUAL mode. (When operating in the MANUAL mode, the Digital Time Display will start
at 00 and count upward, after the steaming compartment reaches cooking temperature,
keeping actual time lapsed.)
SPECIAL NOTES ABOUT CONTROL PANEL:
• Above the "POWER" touch pad is an alert signal which will begin flashing FLOOD - if
the water level controls or drain are not functioning properly and water threatens to
overflow the steam generator. This signal means the unit has shut off the water and all
other func tions.
• Above the "MANUAL" touch pad is a signal which will light up - WATER. It indicates insufficient water level in the steam generator and will automatically go off when a safe
water level is attained. Steamer will not produce steam when this light is on.
CET-8 Service Manual Page 15
NOTE: the event that either of these two-word displays do NOT turn off at the proper time and no
quick remedy can be found (turning of a water valve, etc.) the unit will require the attention
of an Authorized Service Representative.
If FLOOD light is flashing, DO NOT OPEN COMPARTMENT DOOR! Shut off wetter supply
to unit. Flood may be caused by damaged water feed valve. Allow unit to cool before
opening compartment door.
THERMOSTATIC TIMER COMPENSATION:
Whenever this automatic adjustment is taking place, the DIGITAL TIME DISPLAY
will stop counting down (or up if in "MANUAL" mode) and the green indicator light
will stop flashing. Both will remain illuminated. When the steaming compartment
reaches a preset temperature, the steaming operation will automatically begin.
This feature doesn't require any control settings by the owner. It is an automatic
function designed to ensure consistent cooking results whether your food product
is frozen (needing thawed) or if the compartment door is opened too often.
UNIT FUNCTIONAL TEST
Before S/N: C 1613-88A -24 (with Thermistors)
NOTE: This test is intended to be carried out after the unit is installed. If the water,
drain and electrical hook up has been completed property then proceed with
test.
1) Open customer's water supply valve.
2) Check for water leakage at all visible pipe joints, tube connections or unions. Wait a few minutes then look for
water leaking from body of unit. If any leakage is found, repair leaks before continuing.
3) Turn on electricity at Fused Disconnect Switch.
Page 19
Page 16 CET-8 Service Manual
4) Check to see that front control panel is off and is not illuminated.
5) Short the flood probe (upper most) to generator or ground. "FLOOD" light should begin to flash within three to four
seconds. Push "POWER" touchpad. Unit should not turn on. "FLOOD" light will continue to flash.
6) Turn off electricity to the unit at Fused Disconnect Switch and wait ten seconds. Restore electricity to the unit at
the Fused Disconnect Switch.
7) Close Steam Generator drain by removing Steam Generator Cover and placing drain stopper into opening located
along left hand side.
8) Push "POWER" touchpad on front control panel.
9) Red indicator light above the "POWER" touchpad, digit displays and "WATER" indicator will light.
10) After approximately five seconds, the water fill solenoid will energize and water will begin to fill the Steam Generator.
11) Check for water leakage around the base of the unit.
12) When water level reaches the low water cutoff probe (lowest) the "WATER" indicator will turn off and heater contactor will be energized. One heating element will begin to heat the water in the Steam Generator.
13) With compartment door open, push "MANUAL" touchpad. Green indicator above touchpad
14) Contactor and heater will turn off.
15) Push "MANUAL" touchpad again.
16) Heater turns on and green indicator turns off.
17) As the Steam Generator temperature reaches "standby temperature" the contactor will be de-energized and
heater will turn off.
18) Check that Steam Generator did not come to boil and that water level is correct Water temperature should be
between 180° and 190° degrees F.
19) Push "MANUAL" touchpad. Green indicator above touchpad will light. Close compartment door.
20) When compartment door is dosed the condenser solenoid valve and heater contactors will be energized.
21) Check for water flow from drain. Look for water leakage around base of unit
22) Open compartment door. Condenser water and heaters will turn off.
23) Position a test magnet on top of the control panel enclosure over door sensor. Condenser and heaters will turn
on.
24) Watch heaters in Steam Generator to determine that all three are working.
NOTE: This test is best done with cold water in the Steam Generator so that any
differences in heater output may be more easily detected. It may be necessary
to drain and refill Steam Generator before continuing.
Page 20
CET-8 Service Manual Page 17
25) Push "MANUAL" touchpad and remove test magnet.
26) Install Steam Generator Cover and close compartment door.
27) Push and hold "LEFT" Time Set touchpad.
28) Digit displays should count up at two per second for first 5 seconds (display of "00" through "10"). After five
seconds displays will count at 20 per second until switch is released.
29) Release and push the "LEFT" Time Set touchpad again.
30) Digits will return to slow counting.
31) Release "LEFT" Time Set touchpad. Repeal steps 27 thru 30 this time pushing "RIGHT" Time Set touchpad.
32) Set time display to "01" and push TIMED" touchpad.
33) As cooking cycle is started the condenser and all heaters will turn on. The green indicator to the right of the
time display will not be flashing.
34) When the compartment reaches operating temperature the green Indicator to the right of the digit displays
win begin to flash. At this time one heater contactor should be cycling on and off approximately once every 5
35) Turner will count down to "00" one minute after the flashing indicator is first lit, this will end the timed
cooking style cycle.
36) At the end of the cycle the heaters and condenser will turn off. the digit displays will flash ("00") and the
alarm will beep four times.
37) Push "TIMED" touchpad to stop flashing of the displays.
38) Set timer to any setting over "00".
39) Push "MANUAL" touchpad.
40) Digit display will reset to "00", heaters and condenser will turn on and green indicator by digit displays will
flash.
41) Allow the unit to run for at least one minute to see that timer counts up in manual operation.
42) Open compartment door carefully Avoid hot steam contact.
43) Steam and condenser should turn off. Within one minute after the door is opened the timer should stop
counting (green indicator stops flashing)
44) Push "POWER" touchpad one time. Unit turns off
45) End of test.
Page 21
Page 18 CET-8 Service Manual
UNIT FUNCTIONAL TEST
After S/N: C 1613-88A -23 (without Thermistors)
NOTE: This test is intended to be carried out after the unit is installed. If the water,
drain and electrical hook up has been completed property, men proceed
with test.
1) Open customer's water supply valve.
2) Check for water leakage at all visible pipe joints, tube connections or unions. Wait a few minutes then look for
water leaking from body of unit. If any leakage is found, repair leaks before continuing.
3) Turn on electricity at Fused Disconnect Switch.
4) Check to see that front control panel power is off and it is not illuminated.
5) Short the flood probe (upper most) to generator or ground."FLOOD" light should begin to flash within four
seconds. Push "POWER" switch. Unit will not turn on. "FLOOD" light will continue to flash.
6) Turn off electricity to the unit at Fused Disconnect Switch and wait ten seconds. Restore electricity to the unit
Fused Disconnect Switch.
7) Close Steam Generator drain valve by reaching under the unit and pushing the handle to the right. (Units before
serial number C2937-88F-14 have a drain stopper in the generator that must be in place.)
8) Push "POWER" touchpad on front control panel.
9) Red indicator light above the "POWER" touchpad, digit displays and "WATER" indicator will light.
10) After approximately five seconds, the water fill solenoid will energize and water will begin to fill the Steam Generator.
11) Check for water leakage around the base of the unit.
12) If you have removed the front control panel to check for water leakage, make sure ft is up in place and the
compartment door is closed. When water level reaches the low water cutoff probe (lowest) the "WATER" indicator will
turn off and the heater contactor will be energized. The heating elements will begin to heat the water in the Steam
Generator.
13) Open the compartment door and the contactor and heaters will turn off.
14) Clos e compartment door. Push the "MANUAL" touchpad.
15) When compartment door is dosed the condenser solenoid valve and heater contactors will be energized.
16) Check for water flow from drain. Look for water leakage around base of unit.
17) Open compartment door. Condenser water and heaters will turn off.
18) Position a test magnet on top of the control panel enclosure over door sensor. Condenser and heaters will turn
on.
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CET-8 Service Manual Page 19
19) Watch heaters in Steam Generator to determine that all three are working.
NOTE: This test is best done with cold water in the Steam Generator so that any
differences in heater output may be more easily detected. It may be
necessary to drain and refill Steam Generator before continuing.
20] Push "MANUAL" touchpad and remove test magnet.
21) Install Steam Generator Cover and dose compartment door.
22) Push and hold "LEFT" Time Set touchpad.
23) Digit displays should count up at two per second for first 5 seconds (display of "00" through "10"). After five
seconds displays will count at 20 per second until switch is released.
24) Release and push the "LEFT" Time Set touchpad again.
25) Digits should return to slow counting.
26) Release "LEFT" Time Set touchpad. Repeat steps 22 thru 25 this time pushing "RIGHT" Time Set touchpad.
27) Set time display to Wand push "TIMED" touchpad.
28) As cooking cycle is started the condenser and all heaters will turn on. The green indicator to the right of the time
display should not be flashing.
29) When the compartment reaches operating temperature the green Indicator to the right of the digit displays will
begin to flash. At this time one heater contactor should be cycling on and off approximately once every 5 seconds.
30) Timer will count down to "00" one minute after the flashing indicator is first lit, this win end the timed cooking
cycle.
31) At the end of the cycle the heaters and condenser will turn off, the digit displays will flash ("00") and the
alarm will beep four times.
32) Push TIMED" touchpad to stop flashing of the displays.
33) Set timer to any setting over "00".
34) Push "MANUAL" touchpad.
35) Digit display will reset to "00" heaters and condenser will turn on and green indicator by digit displays will flash.
36) Allow the unit to run for at least one minute to see that timer counts up in manual operation.
37) Open compartment door carefully. Avoid hot steam contact.
38) Steam and condenser should turn off. Within one minute after the door is opened the timer should stop count ing
(green indicator stops flashing).
39) Push "POWER" touchpad one time. Unit turns 08.
40) End of test
Page 23
Page 20 CET-8 Service Manual
START-UP and PREHEAT
1. Be sure the Drain Valve is dosed. Reinstall Steam Generator Cover inside steaming compartment. Drain Screen
must be free of debris.
2. Press the "POWER" touch pad. The red indicator light will bec ome illuminated
indicating that the unit power is ON. Also, the word "WATER" will light up. (Water will
enter the unit, filling the steam generator to proper level, the water flow will cease. The
word •WATER" win stop glowing.)
3. Preheat the Steaming Compartment for at least 5 minutes before beginning steaming operation. This is done by
pressing the "MANUAL" touch pad to turn on the heaters.
STEAMING OPERATION
1. Preheat steamer compartment (as described in "Start -Up and Preheat").
2. Slide the pan(s) with food onto the compartment pan slide racks. Close door.
NOTE: To obtain best steaming results, use shallow, perforated pans, without covers. This assures the best
transfer of heat to the food product. When steaming meats, fish or poultry use a catch pan under the
perforated pan to collect the juices. (FAILURE TO USE A CATCH PAN CAN CAUSE A CLOGGED
DRAIN. SEE WARNING NOTE ON PAGE 13).
3. Use either the TIMED" steaming mode or "MANUAL" steaming mode to complete steaming operation.
2. Set time on timer by pressing the "TIME SET" touch pads.
3. Press the "TIMED" touch pad to start steam flow.
4. Food product is now in process of being cooked. (See note below.)
5. When the selected time has elapsed, the steam flow will automatically turn-off.
6. Remove the pans of food, but be aware that they will be hot. Handle with caution.
"MANUAL" STEAMING MODE
1. Consult 'Steamer timer Settings Guide' for suggested cooking times (page 21).
2. Press the "MANUAL" touch pad to start steam flow. The timer will dock up after the initial delay period.
3. Food product is now in process of being cooked. (See note below.)
4. To stop the steam flow open the steam door. (If the "MANUAL" touch pad is pressed the timer will dear to "00" and
resume timing.)
5. Remove the pans of food, but be aware that they will be hot. Handle with caution.
*NOTE: Although the steamer door can be opened at any lime during the steaming cycle, the cooking process wi ll
be interrupted because the steam flow will automatically stop when the door is opened and not begin again
until the door is closed. The total cooking time will be lengthened by the amount of time the door is open.
HELPFUL HINT: After steaming operation is over for the day and daily clean-up/maintenance has been performed
as per instruction, leave the steamer door open a little to prolong the life of the door gasket.
Page 24
CET-8 Service Manual Page 21
SUGGESTED TIMER SETTING GUIDE
ItemMaximum Amount Per
Pan
Asparagus Spears5 Lbs. (2.3 Kg)1-36-9
Broccoli Spears4 Lbs. (1.8 Kg)1-38-11
Carrots (Whole Baby)4 Lbs. (1.8 Kg)1-38-11
Corn, Cobbettes20 Ears1-312-15
Peas, Green5 Lbs. (2.3 Kg)1-34-7
Hot Dogs10 Lbs. (10/1)1*10
Chicken5 Lbs. (Cut 8)1-3*20
Turkey, Frozen12 Lbs. 1*2 1/2 Hrs.
Shellfish3-4 DOZ.1-3*3-8
Number of Perforated
Pans 12 x 20 x 2 1/2''
Suggested Timer
Setting Minutes
* (add cat ch pan)
A Five Minute Preheat Time is Recommended.
PREVENTATIVE MAINTENANCE
DAILY CLEAN-UP
interior:
1. At the end of each day's operation, electricity to the unit should be shut off at the Fused Disconnect Switch and
the steamer compartment door opened allowing the steamer to cool down. Open the drain valve.
2. Remove any spilled food from the steamer, then wash the pan slide rack: drain screen, door gasket, and
compartment interior with mild detergent and warm water. Rinse thoroughly with clear water.
DO NOT use any caustic cleaners awing cleaning procedure. Rinse water should drain freely
through the compartment dram opening. If it does NOT, the drain must be cleaned before using
the steamer.
Page 25
Page 22 CET-8 Service Manual
DAILY CLEAN-UP(Continued)
3. The pan slide racks are easily removed from the steaming compartment for thorough cleaning. They are stainless
steel and can be washed safely in a dishwasher (See "Basic Assembly," page 4, to reinstall.)
4. The Steam Generator Cover should be removed only when cool enough to avoid injury. Check to insure that the
water drains freely.
5. Depending on the water quality being used. mineral build-up will vary Refer to Chemical Descaling Procedure,
pages 22-23).
6. Do NOT try to dean the heating elements or water level probes by scraping, brushing, etc. Extensive damage
could result!
Exterior:
1. Always turn off electricity to the unit at Fused Disconnect Switch before using water on the equipment.
2. Do NOT allow water to run into electrical controls
3. Do NOT
hose down NO HOSES!
he steamer.
4. Allow the steamer to cool before washing. Use the same cleansers and cleaning procedures as for other kitchen
surfaces of stainless steel and aluminum. Mild, soapy water, with a clear water rinse, is recommended.
WEEKLY MAINTENANCE
The steamer is equipped with a drain screen in the back of the cooki ng compartment. The
steamer should never be operated without the screen in place. This screen. prevents large
food particles from entering and possibly restricting the drain line. Any restriction of the drain
line may cause a slight build-up of back pressu re in the compartment resulting in steam leaks
around the door gasket. It also may adversely affect the convection action of the steam in the
compartment which is necessary for optimion performance. Pouring USDA approved drain
cleaner through the compartment drain once a week, will belp to ensure an open drain.
CHEMICAL DESCALING INSTRUCTIONS
PRECAUTIONS:
• Liquid Phosphoric Acid. can be handled with comparitive safety if the basic rules of safety for handling any
acid are followed.
• Breathing the fumes should be avoided. Any areas of the skin with which phosphoric acid comes in contact
should be immediately flushed with large quantities of cold water. Affected clothing should be removed.
• In case of contact with the eyes, the eyes should be flushed with large amounts of cold water for a minimum of
15 minutes, after which, medical attention should be sought.
• Protective goggles are advised, and should be of the approved cup-type. Rubber gloves and a mask to
prevent breathing of dust when handling either the dry product or its solution, are also recommended.
• If accidentally taken internally the person should drink large amounts of water immediately and seek m
attention.
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CET-8 Service Manual Page 23
CLEANING PROCEDURE:
1. Make sure that the steamers' on/off "POWER" touchpad is in the OFF position. Allow ample time for the
compartment and the water in the Steam Generator to cool down before proceeding to step #2.
2. Take the Steam Generator Cover out of the Steam Generator opening.
3. Drain out all of the water present in the Steam Generator by opening the Drain Valve.
4. Remove all loose scale that can be scraped out of the Steam Generator without difficulty and then rinse dean
with tap water. Do not attempt to wash the pieces out through the drain. DO NOT SCRAPE THE HEATING
ELEMENTS OR THE WATER LEVEL PROBES.
5. Close the Drain Valve but leave the Steam Generator Cover out for now.
6. Push the on/off "POWER" touchpad to the ON position. This will allow tap water into the Steam Generator. The
water flow will automatically stop when the normal operating level is reached.
7. Close the cooking compartment door and press the "MANUAL" touch pad to heat the water to 140- 160° F.
8. If the scale on the sides of the Steam Generator extends higher than the water line, add cold tap water
manually (using a container) until the scale is covered with water. The acid works best in water at a temperature
of about 140-160F.
9. Mix two to three cups of phosphoric acid descaler with the hot water in the Steam Generator. A bubbling,
hissing action will be created by the chemical attack of the add on the scale.
10. Replace the Steam Generator Cover on the Steam Generator so the scale on it's surfaces can be removed.
11. Leave the water/acid mixture in the Steam Generator until the metal surfaces have been descaled. The time
required to descale the Steam Generator will vary from a minimum of 1 1/2 hours to several hours, depending on
the quantity of descaling required. As the add is consumed in dissolving the scale, there may still be evidence of
undisolved scale, an additional one or two cups can be added to the working solution.
12. A thorough visual examination of the Steam Generator should reveal that the scale has been removed. When
your inspection is satisfactory, the Steam Generator will be ready to be drained. Simply open the Drain Valve and
let the used cleaning solution drain out. After draining out the used cleaning agent, the Steam Generator will need
to be neutralized to counteract any remaining add.
13. Close the Drain Valve and add three to four tablespoons of baking soda (neutralizing agent) to the Steam
Generator. Set the "TIMED" mode to 10 minutes and push the touch pad to the ON position. A green indicator
light above the touch pad is illuminated when operating in the "TIMED" mode. At the end of the cycle, turn off the
unit at the "POWER" touch pad and open the Drain Valve. Inspect the Steam Generator. If scale exists, repeat
the process; otherwise, descaling is complete.
NOTE: Please contact your Maintenance and Repair Center to purchase Descaling Kits or for information
concerning the descaling procedure.
Page 27
——
288
to
488
volt circuits
Page 24 CET-8 Service Manual
ELECTRICAL CIRCUITRY OVERVIEW
A block diagram for the SteamCraft III is shown in Fig. 1.
SteamCraft III counter type steamers are composed of three separate power systems with interface between each
being handled by relays and contactors. The primary voltage source provided by the customer is used to power all
major power loads in the steamer. The remaining control and display functions are powered by 120 and 18V
secondary windings of the transformer. The contactors used to switch high voltage loads and solenoid valves used to
control water flow are powered by 120 VAC. The control of the 120 volt is carried out by the control board (part #
101606 or 101918). The user input, water level and temperature control, timer functions, time display and safety
circuits are operated on 12 VDC. This regulated DC supply is part of the control board and is powered by 18 VAC.
NOTE: All high voltage (208-480 VAC) input, heater, transformer primary wiring, transformer secondary circuits
(18 and 120 VAC), secondary loads and switching devices (including relay circuits on control boards)
should be isolated from ground.
------128 volt circuits
——Low voltage control circuits
• on units before S/N C 1613-88A-24
Page 28
CET-8 Service Manual Page 25
PRIMARY CIRCUITS
The electrical power input as provided by the customer is used to power heaters and stepdown transformer of the
steamer. These components are affected by the choice of input power in the following ways:
1. Each heater wattage used is available in three design voltages (208,230 and 460 V) Refer to heater data section below.
2. Primary windings of the stepdown transformer may be series or parallel connected for operation at 208-240 or
440-480 volts respective ly.
NOTE: All of the components used in this cooker are designed for use at 50 or
60 Hz. Steamers that are to be run on 50 cycle power must have the
control board modified for that purpose. To do this remove the wire jumper
labeled "JP1". (See figures 2 and 3)
TESTING OF HEATING ELEMENTS:
Disconnect power before checking beating elements
Heating elements may be tested installed in the Steam Generator with or without wiring connected.
Measure resistance of heating dement and compare value to those listed in Table 1 below. It is possible to
determine the actual heater ratings and/or pan number using this method. When trouble-shooting a unit. resistance
between heater terminals and generator tank, (ground) should always be checked. A very high (over 1 Meg ohm) or
infinite resistance should be found between either terminal and ground for dry undamaged heating elements.
CLEVELAND
PART #
101225 2660 208 16
101225-1 2660 230 19
101225-2 2660 460 76
DESIGN WATTS VOLTS OHMS (+/-5%)
Table 1
Page 29
Page 26 CET-8 Service Manual
120 VAC CIRCUITS
The acceptable voltage range for the 120 V secondary circuits is 105 to 140 VAC measured no load at the
transformer. For ease of identification all of these circuits are wired with 8 AWG white wire with color stripe or tracer.
All of the wiring is contained in one harness assembly having one, six position plug for connection to the control
board.
Refer to the detailed wiring diagram on page 29 (Fig. 3) and block diagram on page 24.
Control board mounted relays (normally open SPST contacts) are used to switch 120 VAC to water solenoid valves
and heater contactors. Each relay has one side of its contacts connected to a common 120 VAC input. This input is
supplied to the board directly from the stepdown transformer by a wire (white with black stripe) to pin 1 of CON 3. All
120 VAC outputs are also brought out through CON 3. Four outputs are available on control board pan # 101606 and
three available on # 101918. All 120 V loads have one coil connection tied directly to the stepdown transformer via a
single white wire that is 'daisy chained' from coil to coil.
NOTE: If a digital multimeter (DMM) is being used to check voltage output from
CON 3 to solenoids or contactors the load must remain connected to the
board to obtain an accurate result. This is due to the very high input
impedance of this type of meter allows current feeding through the
capacitors across output relay contacts to appear as 120 volts our.
A description of each outputs function is provided below. Refer to wiring diagrams for CON 3 and wiring harness
WATER PILL SOLENOID VALVE:
The water level control for the Steam Generator is active whenever the steamer is on. In normal operation the water fill
solenoid is energized only after the resistance between the middle water probe and the Steam Generator has been
continuously higher than the set point (12,000 Ohm) for more than 5 seconds. When resistance drops below set point
(water touches probe) the solenoid valve is shut off immediately. See Water Level Control section pages 30-33.
CONDENSOR WATER SOLENOID VALVE:
The condensor water solenoid valve is energized during all cooking cycles as long as the compartment
FRONT CONTACTOR (3 POLE) (before S/N C1613-88A-24) or
FOUR POLE CONTACTOR IN (after S/N C 1613-88A-23):
This contactoris energized (heaters on) when the cooking cycleis in progress and the compartment door is closed
AND water level is above the low water probe. ("WATER" light is not lit)
REAR CONTACTOR (3 POLE) (before S/N C 1613-88A-24):
This contactor functions during steaming cycles and in standby operation. When steamer power is on and water is
above low water probe this contactor cycles on and off to maintain water pan temperature at about 190° F. During
steaming cycles (door dosed and water level above tow probe) this contactor cycles on and off to maintain proper
amount of steam in the compartment See Temperature Controls section page 34-35.
Page 30
CET-8 Service Manual Page 27
LOW VOLTAGE CIRCUITS and CONTROL BOARD
As seen in the block diagram of the steamer, all sensor and user touchpad inputs are connected directly to the
control board at CON 2 and CON 1 respectively. The control board output connections are provided at CON 3 as
discussed in previous section.
All low voltage DC signals to the control board and the low voltage AC power supply inputs are provided at CON 2 of
the control board. This connector location is provided with an attached wiring harness. Refer to Figure(s) 2 and 3
(Pages 28-29). Color coded pairs of wires are used for thermistor (on units before S/N C 1613-88A-24) and
compartment temperature switch inputs. One wire from each pair is connected to the power supply common. Th e
water level control probe and power supply common is connected to ground via the green wire from CON 2. All wires
in the harness except the 18 VAC input can be shorted to ground without risk of damage to the steamer. Open or
shorted wiring will cause improper operation of the steamer. See information below for details.
Printed circuit boards used in Cleveland Range equipment are manufactured with conformal type coatings applied
over all components and circuit traces for moisture protection. This coating may be damaged or removed during
handling or shipment. Erratic behavior of a control board often is the result of moisture contamination or snorting
circuit traces. Typically this condition will cause no permanent damage to the control board. In cases where
moisture is suspected cause of failure, the control board should be removed and thoroughly dried. Particular
attention should be paid to connectors and wire leads. After the control board is returned to operating condition,
steps to prevent further contamination should be taken. This may include additional coatings, repair of water leaks or
correction of installation deficiencies.
DOOR SENSOR:
Heater contactor(s) and condensor solenoid valve will not operate if door position sensor is not activated. This
sensor is mounted on the Control Board Assembly (pan # 101606,101918 and 101607) and is magnetically activated
by a magnet mounted inside the compartment door.
To test the operation of heater and condensor circuits with the control panel assembly removed or compartment
door open, a magnet may be used to activate the door sensor. The magnet must be positioned over the sensor with
the SOUTH MAGNETIC POLE FACING THE SENSOR.
When replacing a Control Board Assembly it may be necessary to reuse the plastic mounting block. 8-32 x 1/4"
screw and bias magnet. To avoid changing magnet polarity, do not remove the bias magnet from plastic block:
DOOR SENSOR LOCATION
Page 31
Page 28 CET-8 Service Manual
Fig- 2 CONTROL BOARD PCB (pan # 101606)
Page 32
CET-8 Service Manual Page 29
Fig. 3 CONTROL BOARD PCB (pan # 101918)
Page 33
Page 30 CET-8 Service Manual
MEMBRANE SWITCH: (pan # 101119)
A properly installed membrane switch when tested with an ohm meter must have a resistance of less than 70 ohms
when held closed. This value is as set by the switch vendor for quality control purposes, the design of the circuit is
based on a 5000 ohm limit.
Before testing or replacing a membrane switch be sure that both the pins and sockets of the switch connector (CON 1)
are clean and free of contaminants and moisture. Refer to page 28 and 29 for connector pin location.
COMPARTMENT TEMPERATURE SWITCH: (part # 101543)
A snap action thermostatic switch is attached to the bottom of the compartment near the front left corner of the Steam
Generator. The timer will count (minutes) when this switch is dosed and suspend timing when the switch is open. The
action of the compartment temperature switch provides compensation for product temperature (fresh or frozen),
compartment loading or opening of the compartment door during a cooking cycle.
Problems related to timing of cooking cycles may result from a damaged or improperly installed thermostatic switch. By
removing and jumping together the two purple wires from CON 2 of the control board an accurate check of the timer
operation may be made. If timer still fails count minutes correctly, separate purple wires and check for 12 VDC
between them. Inspect wire leads and terminals if no voltage is detected and repair as required. The thermostatic
switch should be tested to see that ft doses when compartment temperature reaches 180° to 200° F and opens within
two minutes after the compartment (hot) door is open.
WATER LEVEL PROBES
GENERAL DESCRIPTION:
All Cleveland Range steamers employ resistive sensing type water level control circuits. In this a low power AC
current source develops a potential between the shell of the Steam Generator and the sensing probe. When water fills
the tank to the point where the water contacts the probe, current begins to flow (through water) in the circuit. This
current flow is used to trigger an appropriate switching action. For example turning off the water fill solenoid when
current flows in the water level probe circuit.
Current flow through any circuit is a function of both the voltage and the resistance of the circuit In the case of water
level controls the resistance at which the current flow is great enough to cause the control to switch is called the set
point resistance. This is expressed as a nominal DC resistance value and does not take into account the reactive (AC)
characteristics of the water in the circuit. This explains why the measured resistance through water (probe to tank) may
be somewhat higher than the set point resistance of the control without causing any problems.
Page 34
CET-8 Service Manual Page 31
The SteamCraft III steamer uses a high frequency (15 to 20 kHz) AC current source with an open circuit voltage of
0.6V RMS ( + /-5%). The nominal set point resistance tor all water level probe functions in these steamers is 12,000
Ohms. This value may vary as much as 5,000 Ohms without significant effect on performance.
To test the operation of water level sensing functions ft. is helpful to have a multimeter or ohmmeter to check
resistance and a 100,000 Ohm potentiometer. Connect the pot between the control board "COMMON" (green wire)
and the appropriate probe wire. Refer to test procedure below for function to be tested.
FLOOD PROBE:
1. Disconnect the red wire from the Rood probe
2. Using a meter, set the resistance of the potentiometer to 15,000 Ohms
3. Connect the pot to COMMON (green) and water level probe (red wire)
4. Turn on unit (push "POWER" touchpad) LED indicator will light.
5. Allow one minute of operation to determine if "FLOOD" shut down circuit will be triggered.
6. Remove pot and change resistance to 5,000 Ohms.
7. Reconnect the pot The "FLOOD" indicator light should begin to flash after 3 to 5 seconds. At this time the
"POWER" on/off touchpad should not be functional. Removing the pot will not restore the unit to normal operation.
This can only be accomplished by removing all power from the steamer at the customers Fused Disconnect
Switch.
FLOOD PROBE
Reading should be between 5,000
to 18,000 Ohms
Page 35
Page 32 CET-8 Service Manual
WATER LEVEL:
1) Turn off water or disconnect wires to the water fill solenoid and drain Steam Generator.
2) Disconnect the blue wire from the middle water level probe
3) Using a meter set the resistance of the potentiometer to 20,000 Ohms
4) Connect the pot to COMMON (green) and water level probe (blue wire)
5) Turn on unit (push "POWER" touchpad) and begin timing. Water level solenoid should energize in 5 to 8 seconds.
6) Slowly turn knob on potentiometer to reduce the resistance. Stop turning pot at the moment the water solenoid turns
off.
7) Remove pot and measure resistance. The resistance should be between 10.000 and 15.000 Ohms.
8) Reconnect the pot. The water solenoid should turn off immediately.
WATER LEVEL PROBE
Reading should be between 5.000
to 18,000 Ohms
Page 36
CET-8 Service Manual Page 33
LOW WATER LEVEL:
1) Turn off water or disconnect wires to the water fill solenoid and drain Steam Generator.
2) Disconnect the black wire from the lower water level probe
3) Using a meter set the resistance of the potentiometer to 20,000 Ohms
4) Connect the pot to COMMON (green) and water level probe (black wire)
5) Turn on unit (push "POWER" touchpad) "WATER" warning light should light.
6) With test magnet installed over door sensor, push "MANUAL" touchpad (LED over touchpad will light up).
condenser solenoid valve wit open. Heater contactor(s) will not energize.
7) Slowly turn knob on potentiometer to reduce the resistance. Stop turning pot at the moment the contactor(s}
energize and "WATER" light turns off.
8) Remove pot (c ontactor turns off immediately) and measure resistance. The resistance should be between
10,000 and 18,000 Ohms.
9) Reconnect the pot. The contactor(s) should turn on immediately.
LOW WATER PROBE
Reading should be between 5,000 to
18,000 Ohms
Page 37
Page 34 CET-8 Service Manual
TEMPERATURE CONTROL CIRCUITS
GENERAL DESCRIPTION:
Two separate temperature control circuits have been incorporated into the controls of SteamCraft III steamers. These
controls offer the additional standby and power conservation features. Both circuits use a negative temperature
coefficient thermistor (pan # 101508. used on units before S/N C 1613-88A-24) as a temperature sensor and a board
mounted potentiometer for set point adjustment . Each thermistor to control board combination requires separate
calibration, therefore potentiometers must readjusted if a board or thermistor is replaced.
The operation of both the "STANDBY" and the "DRAIN TEMPERATURE ADJUST" circuits make use of the rear heater
contactor to control heater loads. By doing so, the "STANDBY" circuit can turn on one heater (contactor closed) to
preheat water and the "DRAIN TEMPERATURE ADJUST" circuit can turn off (contactor open) two heaters as a means
of steam regulation during cooking cycles.
NOTE: Water must be in contact with the low water probe before heater contac -
tor(s) will operate. Compartment door must be closed or magnet installed
over door sensor for contactors to operate during a cooking cycle.
STANDBY:
For the "STANDBY" control, the thermistor is mounted to the front of the Steam Generator near the water level probes.
The mounting of the thermistor is critical to proper operation of the control. The thermistor must be in good contact with
the surface it is mounted to. This surface should be free of weld spatter or other defects and provided with a thermally
conductive pad or compound. The water preheat temperature may be changed by adjustment of the control board pot
labeled "GEN TEMP". Turn clockwise to increase temperature. Set control so that water temperature is held at
approximately 190°.
DRAIN TEMPERATURE ADJUST:
"DRAIN TEMPERATURE ADJUST" control operation is also dependant on the adjustment of a board mounted poten-
tiometer, labeled "DRAIN TEMP". Use the following procedure to adjust potentiometer.
1) Remove front control panel assembly and install magnet over door sensor location.
2) Turn "DRAIN TEMP" pot clockwise 10 turns.
3) Turn on steamer and start manual steaming cycle (push "MANUAL" touchpad).
4) Allow steamer to operate empty for 15 to 20 minutes. During this time be sure that the rear heater contactor does
not cycle off. If contactor does turn off, turn pot clockwise additional turns to keep contactor on and begin 15
minute waiting period.
5) Turn pot counter clockwise until contactor just turns off. The contactor should begin to cycle on and off. Continue to
adjust pot until the off time period in these cycles is 4 to 6 seconds. Since on/off cycle time will be affected by
water fill solenoid operation it is best to check timing at a time mid-way between water fill cycles.
NOTE: When "DRAIN TEMP" adjustment is properly set, the drain water
temperature will average 150° to 160° F.
Page 38
CET-8 Service Manual Page 35
THERMISTORS (on units before S/N C 1613-88A-24):
The resistance of a negative temperature coefficient thermistor will decrease as temperature increases. To
determine proper operation, first measure the resistance of the thermistor at room temperature, it should be
between 90,000 and 125,000 ohms. Then measure the resistence after the compartment has operated for at least
10 minutes. The resistence should be between 10,000 and 25,000 ohms. Leaving an ohmmeter connected to a
thermister as it is heated and observing the changes in resistence is the preferred test.
PART NUMBERS FOR SteamCraft ® III CONTROLS
PARTPART#PART #
Control Board101606101918
120vac Harness101693101919
Contactor To heater
Harness
Term. Block to
Contactor Harness
101907
101908
Contactor101351 2 Req.101899 1
Req.
Wring Label101616, 101616A 101616B
TABLE 2
Page 39
*NOTE:
This system
was used
Page 36 CET-8 Service Manual
on units before S/N C
2937-88F-14
Fig. 4 STEAM GENERATOR ASSEMBLY
Item Part No.
1101281Steam Generator Body 1
2101309Steam Generator Gasket1
3
4
*5101431Drain Stopper*1
Heating Element(s) Assembly (see Fig. 7, pages 42-43)Probe Assembly (see Pig- 8, pages 44-47)
STEAM GENERATOR ASSEMBLY
Description
Qty.
Page 40
NOTE
: This system was used
CET-8 Service Manual Page 37
on units after S/N C
2937-88F-13
Fig.5 STEAM GENERATOR ASSEMBLY
Item Part No. Description Qty.
1101281Steam Generator Body 1
2101309Steam Generator Gasket1
* Mounted to Base Plate.
**Mounted to Steam Generator (Prior to CSA Approval).
***Mounted to cooking compartment bottom.
**** Mounted terminal to terminal on contactor coil.
Description
Qty.
Page 61
Page 58 CET-8 Service Manual
Fig. 23 FRONT CONTROL PANEL ASSEMBLY
Item
Part No.
1018743FRONT CONTROL PANEL ASSMBLY - After S/N 6790-89E-05
101874FRONT CONTROL PANEL ASSMBLY - Before S/N 6790-89E-04
11012921Front Panel Weldment 1
2101944Front Panel Gasket 1
31019301Membrane Switch Assembly 1
4101606Control Panel PCB1
5101684Compartment Door Sensor bias Magnet, 1/4"1
6101710Compartment Door Sensor bias Magnet Bracket 1
7145988 x 32 hex nut 12
823148# 8 nylon washer18
Description
NOTE: Nuts and/or washers are used to
maintain adequate space between
support panel and control board.
Qty.
Page 62
CET-8 Service Manual Page 59
NOTE: This system was used on units
before S/N C 6100-89B-27.
Fig. 24 COMPARTMANT DOOR AND HINGE ASSEMBLIES
Item Part No.
1101772Compartment Door Assembly, hinged left (standard)1
2101237Door Gasket 1
3101299Nylon, Ranged Bushing2
DOOR ASSEMBLY, COMPARTMENT
1017721Compartment Door Assembly, hinged right (optional)1
Description
4101269Compartment Door Hinge Bracket 1
510133410 x 32 Pan Head Screw2
6101259Compartment Door Hinge Rod1
710127010 x 32 x 1/2" Hex Head Screw1
COMPARTMENT DOOR HINGE ASSEMBLY
Qty.
Page 63
NOTE:
This system
was
Page 60 CET-8 Service Manual
used on units after S/N
C 6100-89B-27
Fig. 25 COMPARTMENT DOOR and HINGE ASSEMBLIES
Item Part No.
1101772Compartment Door Assembly, hinged left (standard)1
2101237Door Gasket 1
3101299Nylon, Flanged Bushing2
1017721Compartment Door Assembly, hinged right (optional)1
102000Hinge Assembly, Top Left
4101998Hinge, Door, Top Left1
102001Hinge Assembly, Bottom Left
5101999Hinge, Door, Bottom Left1
6102129Screw. 1/4" -28 x 1/2" Hex HD S/S4
COMPARTMENT DOOR ASSEMBLY
COMPARTMENT DOOR HINGE ASSEMBLY
Description
Qty.
Page 64
NOTE:
This system was used on units
Fig.
26
DOOR HANDLE AND LATCH ASSEMBLIES
CET-8 Service Manual Page 61
before S/N 6790-89E-04.
Item Part No.
DOOR HANDLE and LATCH ASSEMBLIES
1101277Handle, Door Assembly1
2101284Washer, Teflon, Door Handle4
3101873Nut, 1/4" -20 Hex elastic lock2
4101255Nut, Spring1
5101260Spring, Door Latch1
6101334Screw # l0-32 x 1/2" Slotted Pan Head S/S1
7101253Nut, Jam, Door Strike Pin 3/8-241
8101256Strike Pin, Door1
923116Washer2
Description
Qty.
Page 65
1.
This system
was used on units after
Page 62 CET-8 Service Manual
NOTES:
S/N 6790-89E-05.
2. All units with this style door use control
panel P/N 1018743.
Fig. 27 DOOR ASSEMBLY
Item Part No.
1102240Hinged Left1
1102237Hinged Left1
2102239Hinged Left and Hinged Right 1
3102231Handle1