Parts Manual Gas Floor Type Convection Steamer

Series: SteamCraft Model 24CGA10 1333 East 179th Street

Cleveland, Ohio 44110

Phone: (216) 481-4900 1-800-338-2204

Fax: (216) 481-3782 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 topcabinet 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.

STEAM VALVE

GND

SP

GND

24V

MV/PV

L105974 M

C

HI

GASVALVE

24V

TRANSFORMER

HEAT STANDBY TIMER

R5 COIL2

R2

IGNITOR

R5

R4

1

R1

R1 R2

3

PRESS SWITCH

R4 COIL

CONTROL MODULE MV

PV

R3 COIL AIR PROVER

SECONDARY 24V

PRIMARY 115V

HIGH LIMITRESET SWITCH

STEAM RELIEF VALVE

FAN MOTOR

R3 R4

2 WIRE, 115 VACTB

POWER SWITCH

3 MIN TIMER 32

1

DESCALETIMER

BLK

8

2

7

34

65

1

R1 COIL

CONDENSER VALVE

HI

WATERBOARD

HN XL

HEATFILL

C

DESCALE INDICATOR

POWER ONR

FILL VALVE

NO

L

NO

AL

& RESET SWITCH

WHT

STEAMCRAFT 10 GAS - MECHANICAL CONTROLN

L1CUSTOMERCONNECTION

TO PROBES

3

2

CBLOWDOWN

OPTIONTIMER 1

R3

NC

DRAIN VALVEUPPER

R6

UPPER MOTORIZED TIMER

R6ANC

MOTOR

C NO

NO SWITCH(SCS OPT)

C DOOR

3

2

1

BUZZER

MANUALTIMEDMANUAL

NOC

R6B3 SEC TIMER

TIMED

(SCS OPT)SWITCH

CR7A

LOWER MOTORIZED TIMER

NC NO

TIMED

C

MANUAL

MOTOR

C NO

MANUAL

NO

R7B

DOOR R2 COIL

STEAM VALVE

CONDENSER VALVE

3 SEC TIMER

1

3

TIMED

2R7BUZZER

P105974 M

RED

WH

T/R

EDW

HT/

YEL

1PRP

WHT

253

2

24

GR

AW

HT/

GR

A

ORN

BLU

WH

T

BLK

RED

YEL

OR

N

20

25 26 27 28

22 21

24 23

107241 - WATERBOARD105788 - AIR PROVER SWITCH 105693 - GAS CONTROL MODULE 105784 - PILOT107239 - PROBE ASSEMBLY 105785 - RELAY ( R3, R4 ), 24V 03524 - RELAY ( R1, R2 ) 120V 22199 - STEAM RELIEF SOLENOID 105695 - FAN105990 - TERMINAL STRIP 20478 - 3 MIN TIMER105966 - RELAY ( R5 ) 120V 106580 - HEAT STANDBY TIMER 22218 - WATER SOLENOIDS 22221 - DRAIN VALVE106541 - BLOWDOWN TIMER

16

WH

T/O

RN 19

17 18

14 15

13

19994 - DESCALE IND / RESET SW 108880 - DOOR SW ( SCS ) MAGNETIC 22193 - COMP STEAM SOLENOID

26

9 106911 - DESCALE TIMER 10 105782 - GAS VALVE ( NAT )

1057821 - GAS VALVE ( LP ) 11 20528 - TRANSFORMER 12 439091 - TERMINAL BLOCK

CO

ND

TOP

7 6

8

3 20477 - 3 SEC TIMER4 41350 - BUZZER5 19993 - POWER SWITCH

2 1

PARTS LIST110198 - MOTORIZED TIMER 104224 - TIMED / MANUAL SWITCH

( OPTIONAL )

18 91 135

3

21

INTERMITTENT

28

26

WH

T/BR

N

BO

TBRN

CO

ND

8

5

BLOWDOWN

19 12

9

4

1

14

13

BLK

8

5

8

31

8

5

124 14

19 9

BLK

1 13

144 12

18

124 14

91 13

RE

DR

ED

13

14

FILLBLU

22

GRN

27

27

GRN

191848

REF

15

RED

RE

D

12

9

BRN

PRP

YEL

BLK

30

WHT/BLK

8

YEL

LT/BLU

CONNECTIONCUSTOMER 12

WHT

WHT

GRA

WHT

BLK

WHT 15

24v

ORN

WHT/ORN

WHT/YEL

YEL

GR

N16

BR

N

TAN

20 RE

D

REDBRN

LT BLUTAN

19PR

P

HI V

OLT

WHT/GRA

RE

D

41

23

8 4

41

85

PR

P

WHTLT BLU

19

14 12

1491312

TAN

LT/BLU

TAN

56

7

58 4

1RE

D

5 1

YEL

YEL

98

58 4

1

LT B

LU

18 1314

912

13 9

LT B

LU

YEL

LT B

LU

18 1314

912

YEL

OR

N

231

WH

T 3

2

BLK

MECHANICAL TIMER

YEL BLK

YELWHT

REDP

RP

RE

D

C

10

14

YEL

YEL

LT BLU

BLK

BR

N

YEL

BRNWHT

29

RED

BLK

BRN

WHT/RED

BLK

XL

HEAT NHFILL

ORN

BLU

WHT

GRN

13 HI

C

BLKRED

17 21

STEAMCRAFT 10 - GAS

RED

6

TANTAN

WHT

LT/B

LU

WH

T/R

ED

W / OPTIONALREMOVED

DOOR SWITCH ( SCS )WHT/BLK

4

3

WHT/RED

16587

43 2

9

RED

ORN

BLK

BLK

RE

D

YEL

WH

T/Y

EL

GR

A

WH

TW

HT/

GR

A

BLKWHT

WH

T

RE

D

BLU

RE

D

BLK

BLK

7

WHT

DOOR SWITCH ( SCS )

5

GRA

WHTWHT/GRA Y

ELW

HT

8

REMOVED W / OPTIONAL

RE

D

BLU

ORN

7

ORN

HI

MP

11

BRN

YEL

WHT/RED

WHT/YEL

RE

D

22

WH

TB

LK

WH

T/B

LK

WH

T/R

ED

WH

TB

LK

RE

D

RE

D

WH

T

WH

T

WHT

RE

D

BLK

LT BLU

1

NC

C NO

32 R7

123

2

ORN/BLK

WHT/BLK

PN

K

LT BLU

OR

N

LT BLULT BLU

W/B

LU

OR

N

1 NO

LT BLU

C

LT BLU

ORN/BLK

2 32

NC

R6WHT/BLK

W/B

LU LT BLU

PN

K

43 2 1

3

LT BLU

WHT/BLKRE

D

29 108995 - HIGH LIMIT RESET SWITCH 30 106144 - IGNITION ASSY 31 222231 - FILL VALVE32 105966 - RELAY ( R6) 120V

W/B

LU

BLK B

LK

BLK B

LK

W/B

LU

Replace the on/off rocker

switch

Yes

Connect powerto steamer.

NoIs the red light on? Is there power to

the steamer?

Is there water inthe sight glass?

Yes

SeeSteamer won't

fill.

No

Has the steamgenerator ignited?

Yes

No

Does the steamersteam in manual

mode?

Yes

Replacethe timer

Yes

Is there power tothe Timed/Manual

switch?No

Repair orreplace thewiring to the

switch

Is there powerfrom the Timed/Manual switch?

Yes

Replace theswitch

No

Does the steamerhave the optional

door switch?

Yes

Replace thedoor switch

Is there 120 VACaccross the coil of

the steamsolenoid.?

No

PROBLEM:24CGA10

Steam cabinet won't

steam with time onthe timer and time/manual switch in

the timed position

Yes

No

SeeSteamer

generatorwon't ignite

No

Steam cabinetwon't steam

Does the steamcabinet steamwhen the door

switch isbypassed?

Yes

Yes

No

Replace thesteam solenoid

Repair or replace the

wiring to the steamsolenoid

No

Steam generatorwon't fill.

Is there powerto the

steamer?

Yes

Supply power tothe steamer.

No

Is there waterto the

steamer?

Supply cold waterto the steamer.

No

Yes

Is there 120 VACbetween the H and Non the water board?

Replace the on/offrocker switch .

No

Yes

Is there 120 VAC

between Fill andN on the water

board?

Yes

Remove the wire from the HIterminal on the waterboard. Is there 120

VAC between Fill andN?

NoReplace the water

boardNo

Is there debris on theHI probe in the

probe assy?

Yes

Replace the wireto the Hi probe.

Clean the probesor replace theprobe assy.

No

Yes

Is there120 VAC acrossthe coil of the fill

solenoid?

Yes

Is water leaving

the fillsolenoid?

Replace the wiringto the fill solenoid.

No

Yes

Replace the fillsolenoid

No

Is there 120 VAC across

the coil of thedrain valve?

Yes

Does the steamer have

the optionalintermittent

blowdown timer?

NoReplace wiring todrain solenoid.

No

Isthere 120 VAC

between terminals2&3 on the timer?

Is waterdraining from

the generator?

Replace the drainvalve.

Yes

Replace theintermittent

blowdown timer.

Yes

Yes

Replace the wiringto the intermittentblowdown timer .

No

No

PROBLEM:24CGA10

Steamgeneratorwon't fill

If water is leavingthe fill solenoidand not draining

from the generatorwhere is it going?check for leaks..

Yes

Is there 120 VACbetween the

terminals Heat andN on the waterlevel board with

the the low probesubmerged?

Is there 120 VACbetween Heat and N

terminals on the waterlevel board with ajumper between

terminal XL and C?

NoClean or

replace theprobe assy.

Replace waterlevel board.

No

Yes

Yes

Is the red light on?Is there power to

the steamer?Connect powerto the steamer

No No

Replace theon/off switch

Is there water inthe sight glass?

YesYes

Yes

SeeSteamer won't

fillNo

PROBLEM:24CGA10

Steam generatorwon't ignite

Steam generatorwon't ignite

Is there 24 VACon ignition

transformer?

Replace theigniton module.

No

With the Topcabinet in the

manual position, isthere 120 VAC to

the fan?

Yes

Is there 120 VACto the coil of

cabinet relay R1?No

Replace theTimed/Manual

switch.No

Is there 24 VAC tothe R4 coil?

Yes

With the bottomcabinet in the

manual position, isthere 120 VAC to

the fan?

Is there 120 VACto the cabinet relay

R2 coil?

Yes

NoYes

Replace thecabinet relay(R1or R2).

No

Is there 24 VAC tothe R3 coil?

Yes

Replace the R4relay.

No

Does the fan turn?Yes

Replace thetimed/manual

switch.No

Replace thefan.

No

Is there 24 VAC tothe gas valve?

Yes

With the high limittemporarily by

passed is there 24VAC to the ignition

module?

No

Replace thehigh limit.

Yes

Adjust orreplace the airprover switch.

No

Replace the R3relay

Yes

Is there 24 VAC tothe PV and MV/PV

terminals on theGas valve and

spark to the igniterfor 90 seconds?

Yes

Replace theignition module

No

Is the pilot valveopening?

Yes

Replace thegas valve.

No

Is there gas to thesteamer?

Yes

Supply gas tothe steamer

No

Due to the construction of the

burner box it is best toreplace the ignitor,

ignition cable and sensor(ground wire ) at the

same time.

Yes

PROBLEM:24CGA10

Electronic timer displays "PAUS" and won't count down

START

Is steam heatingthe cooking

cabinetabove 192degrees (the set

temp of thethermo-switch)?

Does the timercount down whenthe thermo-switch

is bypassed?

Yes

See Steamer

won't steamNo

Replace theelectronic timer

NoReplace the

thermo-switchYes

PROBLEM:24CGA10

Steam leaks around the door.

START

Is COLD watersupplied to the

steamer?

Supply coldwater (35-60PSI) to thesteamer.

No

Is the door gasketphysicallydamaged?

Yes

Turn over thegasket orreplace it.

Yes

Is the door out ofalignment?

No

Replace thedoor bearings

and pins.

Yes

Is the drainobstructed?

No

Remove theobstruction

Yes

Is there 120 VACacross the coil ofthe condensate

solenoid?

No

Replace thewiring to thecondensate

solenoid.

No

Is the solenoidopening?

Yes

Replace thecondensate

solenoid.No

Replace thecondensate spray

nozzle

Yes

Steamerwon'tstop

steaming

PROBLEM:24CGA10

Steamer won't stop steaming withdoor open

Is the timed/manual switchin the timed positionwith no time on the

timer?

Steamer will steamconstantly in the

manual position. Putthe timed/manualswitch in the timed

position with no time onthe timer.

No

Does the steamerhave the optional

door switch?

Yes

Adjust or replacethe door switch.

Yes

Does steamer continue to steam with

both wires removedfrom terminal 1 on the

heat standby timer?

No

Replace the heatstandby timer.

Yes

Is there 120 VAC to the

coil of thecontacter?

No

Replace the timer.

Yes

Is there an amp

draw at theelement?

No

Replace thecontactor

Yes

When power isremoved from theelement steam is

still made forapproximately 10seconds. This is

normal.

No

Problem:24CGA10

Steamer won't preheat

Steamer won'tpreheat

Is the timed/manual

switch in the timed postionwith time on it or in the

manual postion?

See Problem:steamer won't

steam.

Yes

This steamer isnot equiped with a

preheatthermostat. Thetimed manual

switch must be inmanual or timemust be on the

timer.

No

PROBLEM:24CGA10 Generator over--

pressurizes (relief valvedischarges constantly)

Generator over-pressurizes

Is discharge fromrelief valve cold?

See Problem:SteamerFloods

Yes

No

Does generatorover-pressurizewith door open

(and optional doorswitch bypassed)?

Is condensatesolenoid operating

properly?No

Replacecondensate

solenoid.

No

Is the condensate spraynozzle spraying a coneof cold water down the

drain?

Yes

Replace spraynozzle

Check drain forany obstructions

and correctinstallation.

No

Yes

Does the generator over-pressurizeonly when both cabinets have beenrunning and are then shut down?

Yes

Replace thenormally openrelief solenoid

Does generator over-pressurize whenthe steam supply hoses have been

disconnected from the steammanifolds? Warning: Steam is

hot!!

No

Descalegenerator

Yes Replace thesteam

solenoids

No

Problem: 24CGA10 Steamer Floods (Water is entering cabinet through the steam nozzles)

Steamer Floods

Is 120 VAC to thefill solenoid with

water touching thetop probe?

Replace the fillsolenoid.

No

Is there 120 VACto the fill solenoid

with the wireremoved from

terminal 1 on the 3min. timer?

Yes

Replace the 3minute timer.

No

Is there 120 VAC to the fillsolenoid with a jumper

placed from the HI terminalto the C terminal on the

water level board?

Yes

Replace thewater level

board.

Yes

Clean or replace theprobe housing

No

Is gas pressurecorrect (Natural:

2.0" Low and 3.5"high. L.P.: 4.2"low, 10" high)?

Adjust orreplace the gas

valveNo

Yes

Yes

Descaling Procedure-SteamCraft Ultra and Gemini Series

1. Turn the unit OFF and open thedoors:

This will drain and rinse the generator for about3 minutes.

2. Turn the unit power back On:The generator will begin to refill with water.

3. Select Timed with the Timed/Manualswitch:

DO NOT start the timer, since you do not wantto heat the water during descaling. Leave thedoors open.

4. Remove descaling port cap and addwith the specified amount ofDISSLOVE: (See chart above)

Do this while the unit is refilling. The generatorscan take-up to 8 minutes to refill.

5. After refill has stopped, add extra tapwater into the descaling port untilliquid is seen entering the cookingcabinet. Note: Ultra 10 gas will have liquidcoming out of the drain,

Adding extra water when descaling will raise thedescaling solution higher than the normal fill level,allowing the DISSOLVE to work on sensors andsurfaces above the water line

6. Let the descaler soak in generator forapproximately one hour:

7. After one hour, turn the unit powerOff: This will drain and rinse the generatorfor about 3 minutes.

8. After the 3-minute drain cyclecompletes, turn the unit back ON. Afterthe filling has stopped, add water untilliquid enters the cooking compartment (ordrain for the ultra 10 gas), and then turnthe unit OFF. This will drain and flush anyresidue from the water level controlassembly. Replace descaling cap.

9. After the 3 minute drain cyclecompletes, Turn the unit ON and setthe Timer for 20 minutes: Make sure theTime/Manual switch is in the timed settingand the doors are closed.

10. When the timer times out (after 20minutes) turn the power Off:This will drain and rinse the generator forabout 3 minutes.

This ends the descaling procedure. You cannow turn the unit back on and resume normalstartup and cooking operations.

How Much DISSOLVE to UseModel DissolveUltra 3 1/2 Gallon

Ultra 5 1 Gallon

Ultra 10 (Elec.) 1 Gallon (ea.)

Ultra 10 (Gas) 1½ Gallon

Gemini 6 & 10 1 Gallon (ea.)

Note: Some SteamCraft Ultra models (theelectric powered Ultra 10 and Gemini 6 and 10,for example) have two generators and twodescaling ports. Both units should be descaledat the same time, using this procedure