Vulcan C24DA6 Service Manual

SERVICE MANUAL

C24GA AND C24DA SERIES CONVECTION STEAMER

C24GA6 ML-136021

ML-136056 ML-136085

C24GA10 ML-136022

ML-136057

ML-136085 C24DA6 ML-152022 C24DA10 ML-152023

- NOTICE -

This Manual is prepared for the use of trained Hobart Service Technicians and should not be used by those not properly qualified.

This manual is not intended to be all encompassing. If you have not attended a Hobart Service School for this product, you should read, in its entirety, the repair procedure you wish to perform to determine if you have the necessary tools, instruments and skills required to perform the procedure. Procedures for which you do not have the necessary tools, instruments and skills should be performed by a trained Hobart Service Technician.

The reproduction, transfer, sale or other use of this manual, without the express written consent of Hobart, is prohibited.

This manual has been provided to you by ITW Food Equipment Group LLC ("ITW FEG") without charge and remains the property of ITW FEG, and by accepting this manual you agree that you will return it to ITW FEG promptly upon its request for such return at any time in the future.

A product of Vulcan-Hart 3600 North Point Blvd Baltimore, MD 21222

F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER

TABLE OF CONTENTS

SERVICE UPDATES ....................................................................................... 4

SERVICE UPDATES - C24GA .......................................................................... 4

TIS DOCUMENT LIST - C24GA SERIES ................................................................ 4

GENERAL .................................................................................................. 7

INSTALLATION, OPERATION AND CLEANING ......................................................... 7

INTRODUCTION ....................................................................................... 7

GENERAL .......................................................................................... 7

STEAM COOKING ................................................................................. 7

WATER QUALITY STATEMENT ........................................................................ 7

SPECIFICATIONS ...................................................................................... 8

ELECTRIC ......................................................................................... 8

GAS PRESSURES ................................................................................. 8

TOOLS ................................................................................................. 8

REMOVAL AND REPLACEMENT OF PARTS .............................................................. 10

COVERS AND PANELS ............................................................................... 10

COOKING COMPARTMENT SIDE PANELS ....................................................... 10

COOKING COMPARTMENT FLUE WRAP ......................................................... 10

CABINET BASE RIGHT SIDE PANEL .............................................................. 10

CABINET BASE LEFT SIDE PANEL ............................................................... 10

CABINET BASE FRONT PANEL ................................................................... 11

CABINET BASE REAR PANEL .................................................................... 11

COMPARTMENT CONTROLS-OLD ................................................................... 11

COOKING COMPARTMENT DOOR ................................................................... 12

MAIN BURNER ....................................................................................... 15

GAS COMBINATION CONTROL VALVE ............................................................... 16

GENERATOR ASSEMBLY ............................................................................ 17

FILL AND COLD WATER SOLENOID VALVES ........................................................ 19

PILOT/SPARK PROBE FLAME SENSOR (ONLY UNITS WITH ADJUSTABLE PILOT) .................. 20

BLOWER CONTROL RELAY (K3) ..................................................................... 21

SERVICE PROCEDURES AND ADJUSTMENTS ........................................................... 22

BLOWER AIR PRESSURE ADJUSTMENT (ONLY UNITS WITH ADJUSTABLE PILOT) ................. 22

SOLARONICS BURNER ADJUSTMENT (STARTING AT SERIAL NUMBER 463024850) ................ 24

AIR PRESSURE SWITCH ADJUSTMENT (ONLY UNITS WITH ADJUSTABLE PILOT) .................. 26

PILOT BURNER ADJUSTMENT (ONLY UNITS WITH ADJUSTABLE PILOT) ........................... 27

AUTOMATIC IGNITION SYSTEMS .................................................................... 34

IGNITION TEST ....................................................................................... 37

MANIFOLD PRESSURE ADJUSTMENT (ONLY UNITS WITH ADJUSTABLE PILOT) ................... 37

COOKING COMPARTMENT .......................................................................... 39

DOOR ................................................................................................ 39

LATCH ADJUSTMENT ............................................................................ 39

STRIKER ADJUSTMENT .......................................................................... 40

DELIME GENERATOR ................................................................................ 40

COOKING CYCLE TEST .............................................................................. 41

GENERAL ........................................................................................ 41

PROBE INSPECTION ................................................................................. 42

MAINTANENCE CHECKS ............................................................................. 42

ELECTRICAL OPERATION ................................................................................ 44

WATER LEVEL CONTROLS .......................................................................... 44

LOW LEVEL CUT-OFF AND DIFFERENTIAL CONTROL ........................................... 44

SEQUENCE OF OPERATION ......................................................................... 44

SOLARONICS BURNER SEQUENCE OF OPERATION ................................................ 47

COMPONENT FUNCTION - COMPARTMENT ......................................................... 49

COMPONENT FUNCTION - STEAM GENERATOR .................................................... 50

F35425 Rev. E (0119) Page 2 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER

COMPONENT LOCATION ............................................................................. 51

SCHEMATICS AND DIAGRAMS ....................................................................... 54

TROUBLESHOOTING ..................................................................................... 59

TROUBLESHOOTING (ADJUSTABLE PILOTS ONLY) ................................................. 59

GENERAL ........................................................................................ 59

WATER NOT BEING SUPPLIED TO GENERATOR ................................................ 59

PILOT OR MAIN BURNER WILL NOT LIGHT ...................................................... 59

DRAIN SOLENOID VALVE DOES NOT DRAIN .................................................... 59

WATER ACCUMULATING IN COMPARTMENT .................................................... 59

COOKING CYCLE CANNOT BE ACTIVATED ...................................................... 59

STEAMER ACHIEVES PRESSURE SLOWER THAN NORMAL .................................... 59

TROUBLESHOOTING SEQUENCE OF OPERATION .................................................. 60

TROUBLESHOOTING CHART ........................................................................ 61

LED DIAGNOSTIC FLASH CODES (SOLARONICS BURNER SYSTEM WITH

FENWAL IGNITION MODULE UNITS ONLY) ...................................................... 65

Page 3 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - SERVICE UPDATES

SERVICE UPDATES

SERVICE UPDATES - C24GA

January, 2019

• Add swtich step to SOLARONICS BURNER ADJUSTMENT (STARTING AT SERIAL NUMBER

463024850).

December, 2018

• Add C24DA Schematic and Models to service manual.

November, 2018

• Added SOLARONICS BURNER ADJUSTMENT (STARTING AT SERIAL NUMBER 463024850).

• Added BLOWER CONTROL RELAY (K3).

• TROUBLESHOOTING CHART

• Added SOLARONICS BURNER SEQUENCE OF OPERATION.

• Miscellaneous updates per product support.

November, 2014

• This Service Manual was completely revised to include the Professional Model. This revsion was released in November, 2014. No updates presently apply.

TIS DOCUMENT LIST - C24GA Series

SERVICE TAB

Document Title Document Type

C24GA Convection Steamer Service Manual Service Manual

#00-858726 Burner Assembly Replacement Service Kit Instructions (SKI)

C24GA 6 & 10 Gas Floor Steamers - Pressure Switch Not Maintaining Setpoint

Substitute Ignition Module C24GA steamers Part No. 00-857207-00002

SERVICE TAB (Multimedia)

Document Title Document Type

All Stainless Steel with Automatic Timers & Manual Boilers Direct Steam - ST. STL. LEG

Electric Boiler Owners Manual Instructions

Repair Flood-Damaged Food Equipment Misc

C24GA6 & C24GA10 Gas Convection Steamers I/O Manual

C24GA6 & C24GA10 Nason Relay Instructions Service Instructions

Deliming Instructions C24GA6/10 Series Steamers Service Instructions

Fundamentals of Steam Service Instructions

Temporary Service Instructions (TSI)

Instructions

Operator

F35425 Rev. E (0119) Page 4 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER - SERVICE UPDATES

SERVICE TAB (Multimedia)

Fundamentals of Gas Service Instructions

Hobart Water Filter Replacement Cross Reference Sheet Service Instructions

Pilot & Burner Problems on Units Without Powered Burners Service Information

ScaleStick Twin System, Part No. 01-234301-51200 Service Instructions

Water Level Pressure Switches Information Service Instructions

Rating Plate Locations on Current Vulcan-Hart/Wolf Range Equipment

SB630 Gas Range Thermocouples Technical Service Bulletin (TSB)

SB760 Vulcan Steam Temporary Service Instruction / Inspect All Warrick Water Level

SB780 Vulcan C24GA Series Steamers - Enhancements & Additional Service

SB790 Vulcan C24GA - Elimination of Hold Thermostat Technical Service Bulletin (TSB)

SB800 Vulcan Steam Equipment - Enhanced Ignition Modules

SB820 C24GA Series Steamers - Pilot Air Assembly Change & Pressure Regulator

SB860 Atmospheric Steamer Door Switch Actuator Rod Technical Service Bulletin (TSB)

TSB 1374 Water Level Control Part No. 844069-1 Changes

TSB 1393 Steam Cooking Equipment - Prevention, Detection and Treatment of Corrosion on Stainless Steel

TSB 1037A Hobart to Vulcan "Common" Model Cross Reference List

TSB 1270 C24GA (Vulcan) - Elimination of Hold Thermostat

TSB 1281 C24GA(Vulcan) Series Enhancements & Additional Service Information

TSB 1298A Atmospheric Steamer Door Switch Actuator Rod

TSB 1300B Vulcan Steam Equipment - Enhanced Ignition Modules

TSB 1301 Onwatch Quicklook 72 for Gas Cooking Equipment

TSB 1308 C24GA (Vulcan) Series Steamers - Pilot Air Assembly Change and Pressure Regulator Addition

TSB 1339 Vulcan High Efficiency Gas Steamers - Burner Noise

TSB 1360 C24GA Series Gas Steamers - Worm Gear Hose Clamps Replacement with Constant Tension Hose Clamps

TSB 1385 C24GA Series Gas Steamers - Universal Generator Kit Part No. 857684-1

Service Instructions

Technical Service Bulletin (TSB)

Temporary Service Instructions (TSI)

Page 5 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - SERVICE UPDATES

SERVICE TAB (Multimedia)

C24GA Series Gas Steamers - Blower Air Pressure Adjustment Procedure Change

Hobart & Vulcan Steamers/Kettles with Warrick Water Level Control Boards

Steamers - Main Transformer Primary Tap on Electric Machines

Steamers Wire Insulation Pinched Under Screw Lug on Terminal Block & Contractors

PARTS TAB

Document Title Document Type

Part Catalog for C24GA 6 & 10 Parts Catalog

Temporary Service Instructions (TSI)

F35425 Rev. E (0119) Page 6 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER - GENERAL

GENERAL

INSTALLATION, OPERATION AND

CLEANING

Refer to the F35423 - C24GA6/10 Series Gas Convection Steamers Installation & Operation Manual and F35439 -Deliming Instructions C24GA6/10 Series Steamers for specific instructions.

INTRODUCTION

General

Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any model unless the picture or illustration needs to be model specific. All information and specifications contained in this manual are based on the latest product information available at the time of printing.

Steam Cooking

Convection steamers offer an efficient way to produce many foods in either small portions or larger batches. Convection steam cooking will steam cook fresh foods or will steam defrost and cook frozen foods providing the maximum color, flavor and nutritional value with the least expenditure of energy and labor. The atmospheric steaming compartment allows the operator to open and close the door anytime during a cooking cycle. The generator burner heating will shut off when the door is opened then re-start when the door is closed.

equipment will vary depending on the local water conditions. Your water supply must be within the general guidelines outlined in the chart below at all times during use of this machine or service issues not covered under warranty may result.

Water hardness should be treated by removing the impurities (water softener with carbon block or dechlorinator and/or in-line water treatment). Low water hardness may also require a water treatment system to reduce potential corrosion. Water treatment has been shown to reduce costs associated with machine cleaning, reduce deliming and reduce corrosion of metallic surfaces.

Daily washing and rinsing of the cavity is required. In some cases, it may be needed more than once a day to prevent compounding of contaminants deposited inside cavity even with acceptable filtration. Failure to wash and rinse down the cavity daily could result in damage of the oven cavity and interior parts. A Reverse Osmosis water treatment system can be installed to eliminate chlorides or other contaminates from the water if needed.

NOTE: Failure to properly maintain water quality or preventative procedures for water can lead to issues not covered under warranty.

Plumbing connections must comply with the applicable sanitary, safety and plumbing codes.

Model Designations

MODEL CONTROLS

C24GA6-BSC Basic 6

C24GA6-DLX Professional 6

C24GA10-BSC Basic 10

C24GA10-DLX Professional 10

* based on 1 inch pan depth

PAN

CAPACITY*

WATER QUALITY STATEMENT

The fact that a water supply is potable is no guarantee that it is suitable for steam generation. Proper water quality can improve the taste of the food prepared in the oven, reduce scale build-up or corrosion, and extend equipment life. Local water conditions vary from one location to another and can change throughout the year. The recommended water treatment for effective and efficient use of this

Page 7 of 65 F35425 Rev. E (0119)

WATER SUPPLY GENERAL GUIDELINES

Supply Pressure (dynamic flow)

Hardness

Silica less than 13 ppm

Chloramines

Chlorides

Total Chlorine

PH range 7-8

Undissolved Solids less than 5 microns

Testing of water is always done AFTER water filter or water treatment used. Water quality does change with usage and should be checked after idle times to see if the condition worsens.

30-60 psig

less than 3 grains (17.1 ppm = 1 grain of hardness)

zero

less than 30 ppm

zero

C24GA AND C24DA SERIES CONVECTION STEAMER - GENERAL

A carbon block filter system should always be used to remove Chlorine and Chloramine. If a water softener is used, a carbon block is still required. Check with your local water treatment specialist for proper sizing and replacement intervals for the carbon block cartridge.

If the Chlorides exceed 30 ppm and the oven is used more than 8 hours during the day in steam or combination mode, the cavity will require rinsing every 8 hours. Failure to do so will result in corrosion and rusting of the oven cavity and interior parts. A Reverse Osmosis water treatment system can be installed to eliminate chlorides from the water and reduce the hardness. Preventative washing and rinsing may be needed more than once a day to prevent compounding of contaminants inside cavity.

Total Chlorine of 4.0 ppm is the max limit for the building water supply. A carbon block filter must still be used to remove all Chlorine and Chloramines from the water. Failure to do so will result in corrosion and rust in the cooking cavity, which is not covered under warranty.

SPECIFICATIONS

Burner Pressure**

Hot .4" to .5" WC.

Cold .33" to .35" WC

** The blower air pressure reading will be higher when the steam generator is hot vs cold. If the steam generator has been on for 15 minutes or more, the operating condition is considered hot. 24 volt transformer needs to be disconnected when checking blower speed settings.

TOOLS

Standard

• Standard set of hand tools.

• VOM with minimum of NFPA-70E CATIII 600V, UL/CSA/TUV listed. Sensitivity of at least 20,000 ohms per volt and the ability to measure DC micro amps. Meter leads must also be rated at CAT III 600V.

• Temperature tester (thermocouple type).

• Manometer.

• Gas leak detection equipment. (Must be resistant to reaction of propane gas).

Electric

120VAC/60HZ/1 phase (proper ground required).

NOTE: Do not connect this unit to a ground-fault circuit-interrupter (GFCI) 125-volt, single-phase, 15and 20-ampere receptacle. Electronic burner ignition systems are prone to nuisance tripping and possible ignition failure.

Gas Pressures

Gas Supply Pressure*

Natural 7.0" - 10.5" W.C.

Propane 11.0" - 13" W.C.

* Maximum supply pressure can not exceed 14" W.C. (1/2 psig).

Gas Manifold Pressure

Natural 2.5" W.C.

Propane 10.0" W.C.

Blower Air Pressure

NOTE: Blower settings are only made on units up to serial number 463024849, soloranics burner is not adjustable.

0.35" W.C. - Cold

.45" W. C. - Hot

• Clear silicone sealant.

Special

• Requires U-inclined (Grainger P/N 3T294) or digital (Grainger P/N 4JZ78) manometer capable of reading in 0.01" WC increments. Used for measuring gas manifold pressures and blower air pressures.

• RTV 109 for securing gasket to door.

• Loctite® 271.

• Screwdriver, 1/8 X 4 cabinet tip.

• Scale Release PN 854893-13 (14 oz).

• SPS620V Red Filter Head (Kit P/N 854306-00013).

• SMF620 Black Head (Kit P/N 857487-00620).

• Combustion analyzer needed for Soloronics burner assembly set up procedures.

• Pressure Gauge Assembly

• Low Pressure Gauge - 0 to 5 psi.

recommended (Grainger Part No. 2C641).

• Water Hose Coupling - swivel type

(Grainger Part No. 4KG87).

• Reducer Bushing (Grainger Part No.

6MN61).

F35425 Rev. E (0119) Page 8 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER - GENERAL

• Pipe thread sealant (as required).

Fig. 1

• Pressure gauge and fittings to check inlet water pressure for condensate connection.

Page 9 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

REMOVAL AND REPLACEMENT OF PARTS

COVERS AND PANELS

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Cooking Compartment Side Panels

NOTE: Removal of left side panel is identical to the

procedure for the right side panel.

1. Remove the screws then remove the side panel from the compartment.

Fig. 3

Cabinet Base Right Side Panel

1. Remove the screws then remove the right side panel from the cabinet base.

Fig. 4

Cabinet Base Left Side Panel

1. Remove the screws then remove the left side

Fig. 2

Cooking Compartment Flue Wrap

1. Remove left and right side panels from compartment. Remove screws that secure flue wrap.

F35425 Rev. E (0119) Page 10 of 65

panel from the cabinet base.

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Fig. 7

Fig. 5

Cabinet Base Front Panel

COMPARTMENT CONTROLS-OLD

1. Remove the screws then remove the front panel from the cabinet base.

Fig. 6

Cabinet Base Rear Panel

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove compartment right side cover as outlined under COVERS AND PANELS.

2. Remove the component being replaced.

3. Reverse the procedure to install the replacement component, then check steamer for proper operation.

NOTE: Electrical components are connected to the rear panel. Be prepared to note wires and disconnect when removing rear panel.

1. Remove the screws then remove the rear panel from the cabinet base.

Page 11 of 65 F35425 Rev. E (0119)

Fig. 8

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

COOKING COMPARTMENT DOOR

Removal

1. Close Door.

2. Remove compartment left SIDE PANEL.

3. Remove nuts from top door support bracket.

Fig. 9

4. Open door slightly, and while holding door, pull upper hinge away from front panel.

3. Remove the gasket plate.

4. Remove gasket from inner door panel.

5. Remove RTV from bottom part of inner door panel. Apply new RTV 109 to bottom of door where shown when assembling gasket to door.

6. Place a small amount of RTV109 into the inner door panel gasket screw holes before assembly.

7. Position the new gasket on gasket plate and reverse procedure to install

NOTE: Damage to the gasket sealing surface, such as nicks or cuts, will cause steam leakage.

Handle Removal

1. Open the door.

2. Remove screws from the top and bottom of the door.

5. Pull upper hinge out of upper door hinge bushing.

6. Lift door assembly up and off lower door hinge.

7. Reverse the procedure to install and check for proper operation.

8. Reinstall parts removed in reverse order of removal.

9. Check door for fit and proper sealing of gasket.

Gasket

1. Open the door.

2. Remove the shoulder screws and pan pusher bracket from gasket plate.

Fig. 11

3. Pull outer door housing away from inner door panel starting at the hinge side of door to separate the door halves.

4. Remove lock nuts and stepped spacers from threaded studs of door handle.

Fig. 10

F35425 Rev. E (0119) Page 12 of 65

Fig. 12

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

5. Reverse procedure to install. When installing the spacers, the smaller diameter fits into the slot in the door and the latch. Use Loctite 271 to secure fasteners.

Handle Installation

1. Apply Lubriplate 630AA around slots of outer door housing where step spacers contact housing.

2. Install door handle into outer door housing such that hinge side of door housing is to the left and arrow on handle is pointed upward.

3. Install step spacer with smaller radius toward handle and door housing. Smaller radius is a slip fit with outer door housing slot.

8. Apply Loctite 7471 Primer N and Loctite 242 to threads of screws before assembling.

9. Install screws to secure door halves together.

10. Check opening and closing operation of door.

Latch Assembly and Removal

1. Separate outer door housing assembly from inner door panel as outlined under DOOR HANDLE REMOVAL.

2. Remove screws securing latch assembly to inner door panel and remove latch mechanism.

Fig. 13

4. Install lock nuts and tighten until no gap exists between handle, step spacer and lock nut. Do not over-tighten lock nuts.

5. Close inner door panel so that latch mechanism engages striker on front panel.

6. Install outer door housing onto inner door panel.

7. Align the top and bottom screw holes of outer door housing with inner door panel.

Fig. 15

3. Remove E-clip from latch assembly pins and pull pins from latch mechanism.

Fig. 16

4. Remove retaining pin from spring pin.

5. Separate sliding bracket from stationary bracket.

Fig. 14

Page 13 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

A. Apply Loctite 271 to threads of screws

before assembly and secure latch assembly to inner door panel.

Fig. 17

Latch Assembly

1. Apply Lubriplate 630AA to sides of sliding bracket.

2. Insert spring pin into bottom of sliding bracket.

A. Place spring over spring pin.

3. Assemble sliding bracket into stationary bracket.

4. While holding head of spring pin against bottom of sliding bracket, insert spring pin into keeper hole in bottom of stationary bracket.

2. Install outer door housing assembly as outlined in DOOR HANDLE INSTALLATION.

3. Check opening and closing operation of door.

4. Check steamer for proper operation and leaks around door seal

Hinge Bearings

Fig. 19

Fig. 18

A. Secure spring pin in place with retaining pin.

NOTE: Install pins such that heads of pins will be facing inward toward hinge side of inner door panel when latch assembly is installed.

5. Install pins to assemble stationary and sliding brackets together.

A. Secure pins into position with E-clip.

Latch Installation

1. Install latch assembly onto inner door panel with spring pin toward bottom of door panel.

1. Close door.

2. Remove left SIDE PANEL.

3. Remove nuts from upper hinge located inside front panel.

Fig. 20

4. Open door slightly, and while holding door, pull upper hinge away from front panel.

5. Pull upper hinge out of upper door hinge bearing.

6. Lift door assembly up and off lower door hinge.

7. Pry hinge bearing out from door assembly.

8. Remove outer door housing.

F35425 Rev. E (0119) Page 14 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Do not drive bearing into place. The inner door panel could be damaged. Press bearing into position.

NOTE: When replacing door hinge bearings, replace both hinge bearings.

9. Position replacement hinge bearing over hinge opening in door assembly.

Fig. 22

CURRENT PRODUCTION SHOWN IN Fig. 23

Fig. 21

10. Reassemble parts removed in reverse order.

11. Check door for fit and proper door gasket sealing.

MAIN BURNER

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

In the previous production (up to serial number

463024849) blower assembly components were

separate (gas valve, air pressure switch, blower, and ignition module). Current production blower assembly (starting at serial number 463024850) is one unit and the air pressure switch is not required. The ignition module has changed locations and the wire harness is different. NOTE and VERIFY all wire connections.

PREVIOUS PRODUCTION SHOWN IN Fig. 22

Fig. 23

1. Remove front and side covers as outlined under COVERS AND PANELS.

2. Disconnect the gas line at gas combination control valve.

Fig. 24

Page 15 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

3. Disconnect wires to burner assembly.

4. Remove the nuts securing burner to tank.

5. Drop blower end of burner assembly slightly down to clear control box and push all interfering wires out of the way so that burner can be pulled out of tank.

6. Reverse procedure to install burner assembly.

GAS COMBINATION CONTROL

VALVE

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Fig. 25

Shut off the gas before servicing the unit and follow lockout / tagout procedures.

All gas joints disturbed during servicing must be checked for leaks. Check with a soap and water solution (bubbles). Do not use an open flame.

A. CHECK ALL JOINTS PRIOR TO THE GAS VALVE (SOLENOID) BEFORE LIGHTING THE UNIT.

B. CHECK ALL JOINTS BEYOND GAS VALVE (SOLENOID) AFTER UNIT IS LIT.

1. Remove FRONT AND RIGHT SIDE PANELS.

2. Remove main burner as outlined in MAIN BURNER.

3. Disconnect electrical supply wires running to gas combination control valve.

4. Disconnect pilot gas supply tube from control.

5. Disconnect pipe connections on each side of gas combination control valve.

6. Reverse procedure to install.

7. Verify PILOT BURNER ADJUSTMENT (ONLY UNITS WITH ADJUSTABLE PILOT).

NOTE: No pilot burner adjustment needed if unit has Solaronics burner assembly.

ADJUSTABLE PILOT (1, Fig. 26) BURNER SHOWN

F35425 Rev. E (0119) Page 16 of 65

Fig. 26

SOLARONICS BURNER ASSEMBLY (1, Fig.

27) NON-ADJUSTABLE PILOT

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Fig. 27

GENERATOR ASSEMBLY

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Shut off the gas before servicing the unit and follow lockout / tagout procedures.

All gas joints disturbed during servicing must be checked for leaks. Check with a soap and water solution (bubbles). Do not use an open flame.

A. CHECK ALL JOINTS PRIOR TO THE GAS VALVE (SOLENOID) BEFORE LIGHTING THE UNIT.

B. CHECK ALL JOINTS BEYOND GAS VALVE (SOLENOID) AFTER UNIT IS LIT.

1. Drain the generator and allow steamer to cool, if necessary.

Fig. 28

2. Remove rear and side panels.

3. Disconnect gas line at gas combination control valve.

Fig. 29

NOTE: Earlier production units show in graphics.

Page 17 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Fig. 30

4. Disconnect wires to burner assembly.

5. Disconnect wires from gas combination control valve.

6. Remove the nuts securing the burner to generator.

7. Drop blower end of burner assembly slightly down to clear control box and push all wires out of the way so that burner can be pulled out of tank.

17. Rotate pressure relief valve coupling to allow pressure relief valve to be rotated about 90° so that valve is below generator top level.

18. Remove pressure switch from generator.

Fig. 31

8. Disconnect wires from the operating pressure switch.

9. Loosen hose clamp attaching lower flexible water line at back panel and use a wrench to disconnect barb fitting from main inlet water connection.

10. Loosen hose clamp attaching upper flexible water line at back panel and use a wrench to disconnect barb fitting from main inlet water connection.

11. Remove water line from generator. Remove steam hoses from steam trap and supply to super heater.

12. Disconnect gas tubing from rear panel.

13. Remove steel drain tube at tank.

14. Disconnect union between tank and drain.

15. Loosen cable clamp screws securing electrical cable at rear panel so that cable is free to move.

16. Remove screws to free super heater and lift super heater off flue pipe, if applicable.

Fig. 32

19. Remove bolts attaching front of generator to frame.

F35425 Rev. E (0119) Page 18 of 65

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Fig. 33

20. Move any interfering components out of the way, then push generator slightly forward to disengage feet and remove generator from rear of cabinet.

21. Reverse procedure to install generator.

FILL AND COLD WATER SOLENOID

VALVES

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Turn off water supply to steamer.

2. Remove FRONT AND SIDE COVERS.

PREVIOUS PRODUCT SHOWN

Fig. 34

3. Pull quick connect power leads off solenoid valve being serviced.

4. Disconnect water lines to solenoid valve being serviced and remove solenoid valve from unit.

Fig. 35

CURRENT PRODUCTION SHOWN

Page 19 of 65 F35425 Rev. E (0119)

C24GA AND C24DA SERIES CONVECTION STEAMER - REMOVAL AND REPLACEMENT OF PARTS

Fig. 37

SOLARONICS BURNER ASSEMBLY (1) NONADJUSTABLE PILOT

Fig. 36

5. . Reverse procedure to install solenoid valve.

PILOT/SPARK PROBE FLAME

SENSOR (ONLY UNITS WITH

ADJUSTABLE PILOT)

Shut off the gas before servicing the unit and follow lockout / tagout procedures.

NOTE: Only for units with adjustable pilot burner.

ADJUSTABLE PILOT BURNER (1)

Fig. 38

1. Remove MAIN BURNER ASSEMBLY.

2. Disconnect gas tube from pilot burner and remove pilot assembly screws.

F35425 Rev. E (0119) Page 20 of 65

Fig. 39

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