Cleveland 24CGA10 Service Manual
Statement of Responsibilities
This document is for use by experienced and trained Qualified Cleveland Range, LLC Authorized Service
Representatives who are familiar with both the safety procedures, and equipment they service.
Cleveland Range, LLC assumes no liability for any death, injury, equipment damage, or property damage
resulting from use of, improper use of, or failure to use the information contained in this document.
Cleveland Range, LLC has made every effort to provide accurate information in this document, but
cannot guarantee that this document does not contain unintentional errors and omissions.
The information in this document may be subject to technical and technological changes, revisions, or
updates.
Cleveland Range, LLC assumes no liability or responsibility regarding errata, changes, revisions, or
updates.
Qualified Cleveland Range, LLC Authorized Service Representatives are obligated to follow industry
standard safety procedures, including, but not limited to, OSHA regulations, and disconnect / lock out /
tag out procedures for all utilities including steam, and disconnect / lock out / tag out procedures for gas,
electric, and steam powered equipment and / or appliances
All utilities (gas, electric, water and steam) should be turned OFF to the equipment and locked out of
operation according to OSHA approved practices during any servicing of Cleveland Ran ge equipment
Qualified Cleveland Range, LLC Authorized Service Representatives are obligated to maintain up-to-date
knowledge, skills, materials and equipment.
Cleveland Range, LLC
1333 East 179th St., Cleveland, Ohio, U.S.A. 44110
Ph: 1-216-481-4900 Fx: 1-216-481-3782 Visit our Web Site at www.clevelandrange.com
CLEVELAND RANGE 24CGA10
SEQUENCE OF OPERATIONS
Mechanical Timer
1. To turn the unit on, depress the red on/off rocker switch.
• 115 VAC is sent to the red indicator light.
• 115 VAC is sent to normally open drain valve closing it.
• 115 VAC is sent to H and N of the water level board
115 VAC is sent to the timed/manual switches.
•
•
115 VAC is sent to the heat standby timer which will energize the R5 relay 20 seconds
every 6 minutes to maintain heat while unit is idle
2. With the water level board energized and no water in the generator
• After a 5 second delay 115 VAC is sent from the FILL terminal to the fill solenoid.
• The fill solenoid opens and the generator fills through the drain valve.
• The water fills to the low probe shorting it to ground
• 115 VAC is sent from the HEAT terminal to the 24 VAC heat circuit transformer.
•
3. When the timed/manual switch is in the timed position and time is on the timer for the top
cabinet only
• 115 VAC is sent from the timer to the coil of the R6 relay.
• The R6 relay energizes
• R6B contacts close sending 115 VAC to the timer motor.
• R6A contacts close sending 115 VAC through the door switch (optional) to the steam
solenoid, condensate solenoid and R1 relay.
• R1 is energized closing the R1 contacts.
• 24 VAC is sent from the 24VAC transformer to the normally open contacts of R2.
• 24 VAC is sent from the 24VAC transformer to the R4 coil.
• R4 is energized and the R4 contacts are closed.
• 24 VAC is sent to one side of the ignition module.
• 24 VAC is sent to the R3 relay coil
• R3 is energized and the R3 contacts are closed.
• 115 VAC is sent through the now closed R4 contacts to the normally open steam
relief valve closing it.
• 115 VAC is sent to the fan motor.
• The fan motor is energized and the air prover switch closes.
• 24 VAC is sent through the normally closed highlimit and the now closed air prover
switch to the other side of the ignition module.
4. With 24 VAC to both sides of the ignition module.
• Spark is sent to the igniter.
• 24VAC is sent to the pilot coil on the gas valve and gas is sent to the pilot.
• When flame is generated and 1.0 micro amps DC is detected, 24 VAC is sent to the main
coil of the gas valve igniting the main burner on low flame.
• Steam is energized and sent to the cooking compartment.
• When the mechanical timer times down a buzzer will sound and the timer will open
removing 115 VAC from the heat circuit.
5. When the timed/manual switch is in the timed position and time is on the timer for the
bottom cabinet only
• 115 VAC is sent from the timer to the coil of the R7 relay.
• The R7 relay energizes
• R7B contacts close sending 115 VAC to the timer motor.
• R7A contacts close sending 115 VAC through the door switch (optional) to the steam
solenoid, condensate solenoid and R2 relay.
• R2 is energized closing the R2 contacts.
• 24 VAC is sent from the 24VAC transformer to the normally open contacts of R1.
• 24 VAC is sent from the 24VAC transformer to the R4 coil.
• R4 is energized and the R4 contacts are closed.
• 24 VAC is sent to one side of the ignition module.
• 24 VAC is sent to the R3 relay coil.
• R3 is energized and the R3 contacts are closed.
• 115 VAC is sent through the now closed R4 contacts to the normally open steam
relief valve closing it.
• 115 VAC is sent to the fan motor.
• The fan motor is energized and the air prover switch closes sending 24 VAC to the
other side of the ignition module.
6. With 24 VAC to both sides of the ignition module.
• Spark is sent to the igniter.
• 24VAC is sent to the pilot coil on the gas valve and gas is sent to the pilot.
• When flame is generated and 1.0 micro amps DC is detected, 24 VAC is sent to the main
coil of the gas valve igniting the main burner on low flame.
• Steam is energized and sent to the cooking compartment.
• When the timer times down, the closed contact will open removing 115 VAC from the
heat circuit.
• 115 VAC will be sent through the now closed contacts to the 3-second timer.
• For 3 seconds 115 VAC will be sent to the buzzer and it will buzzzzzz.
7. When the timed/manual switch is in the timed position and time is on the timer for both
cabinets
• 115 VAC is sent from the timer through the door switch (optional) to both steam
solenoids, both condensate solenoids and both relays.
• Both relays are energized closing the relay contacts.
• 24 VAC is sent from the 24VAC transformer through the R1 and R2 contacts to the
high coil on the gas valve.
• 24 VAC is sent from the 24VAC transformer to the R4 coil.
• R4 is energized and the R4 contacts are closed.
• 24 VAC is sent to one side of the ignition module.
• 24 VAC is sent to the R3 relay coil.
• R3 is energized and the R3 contacts are closed.
• 115 VAC is sent through the now closed R4 contacts to the normally open steam
relief valve closing it.
• 115 VAC is sent to the fan motor.
• The fan motor is energized and the air prover switch closes sending 24 VAC to the
other side of the ignition module.
8. With 24 VAC to both sides of the ignition module.
• Spark is sent to the igniter.
• 24VAC is sent to the pilot coil on the gas valve and gas is sent to the pilot.
• When flame is generated and 1.0 micro amps DC is detected 24 VAC is sent to the main
coil of the gas valve igniting the main burner on high flame (the high coil was energized
in step 7).
• Steam is energized and sent to the cooking compartments.
• When the timers time down the buzzers will sound and each timer will open removing
115 VAC from the heat circuit.
9. When the water level reaches the high probe then 115 VAC is removed form the FILL
terminal and the fill solenoid is turned off.
10. After the water level drops below the high probe for 5 seconds 115 VAC is sent to the FILL
terminal again.
11. 115 VAC is turned of by depressing the red on/off rocker switch.
• 115 VAC is removed from the timer and heating circuits.
• 115 VAC is removed from the normally open drain valve allowing the steamer to drain.
• 115 VAC is sent to the 3-minute timer.
• The fill solenoid is energized for 3 minutes flushing the drain.
L105974 M
IGNITOR
3
R4
R5
R1
1
HEAT STANDBY TIMER
2
R1
R2
GND
24V
GND
24V
SP
CONTROL
MODULE
R3 COIL
R2
R4 COIL
MV/PV
MV
TRANSFORMER
PV
PRESS SWITCH
AIR PROVER
HIGH LIMIT
RESET SWITCH
HI
C
GAS
VALVE
SECONDARY 24V
R5 COIL
STEAM RELIEF VALVE
PRIMARY 115V
LOWER MOTORIZED TIMER
MOTOR
R7A
DOOR
C
NO
C
R7
NC
R3
NO
(SCS OPT)
SWITCH
R4
CONDENSER VALVE
1
STEAM VALVE
FAN MOTOR
R2 COIL
MANUAL
UPPER MOTORIZED TIMER
MOTOR
TIMED
C NO
R7B
MANUAL
TIMED
3 SEC TIMER
3
2
BUZZER
NC
NO
(SCS OPT)
SWITCH
STEAM VALVE
R1 COIL
R6A
DOOR
C
NO
R6B
NOC
C
R6
CONDENSER VALVE
1
3 SEC TIMER
3
2
BUZZER
3
MANUALTIMEDMANUAL
TIMED
BLOWDOWN
OPTION
TIMER
C
1
2
R3
NC
POWER SWITCH
POWER ON
R
DRAIN VALVE
H
N
HEAT
UPPER
FILL
XL
WATER
BOARD
HI
C
PROBES
TO
3 MIN TIMER
3
1
2
FILL VALVE
DESCALE
BLK
2 WIRE, 115 VAC
CUSTOMER
TIMER
CONNECTION
STEAMCRAFT 10 GAS - MECHANIC A L CONTROL
3
4
7
8
2
1
6
5
NO
L
A
L
NO
DESCALE INDICATOR
& RESET SWITCH
TB
L1
N
WHT
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