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NOTICE: 

This Owner’s Operating and Installation Manual should be 

given to the user. The operator of the oven should be 

familiar with the function and operation of the oven. 
This manual must be kept in a prominent, easily reachable 

location near the oven. 
Ovens are shipped from the factory configured for use with 

Natural gas. If permitted by local, national,  and 

international codes, at the time of installation the oven may 

be converted to Propane gas operation. This conversion 

requires the use of a Gas Conversion Kit that is supplied 

with the oven. 
For CE-approved ovens, the conversion is described in the 

Installation section of this manual. 
For domestic and standard export ovens, instructions are 

included in the Gas Conversion Kit. 
Middleby Marshall suggests a service contract with a 

Middleby Authorized Service Agent (ASA). 

DEFINITIONS  

DANGER 

INDICATES A HAZARDOUS SITUATION THAT, IF NOT 

AVOIDED, WILL RESULT IN DEATH OR SERIOUS 

INJURY.

 

 

WARNING 

Indicates a hazardous situation that, if not avoided, 

could result in death or serious injury.

 

 

CAUTION 

Indicates a hazardous situation that, if not avoided, 

could result in minor or moderate injury.

 

 

NOTICE 

Indicates situations not related to physical injury that, if not 

avoided, could cause damage to the machine or 

surrounding property and could affect warranty coverage. 

IMPORTANT 

Includes other information required by the operator or 

installer. 

WARNING 

This appliance is not intended for use by persons 

(including children) with reduced physical, sensory 

or mental capabilities, or lack of experience and 

knowledge, unless they have been given supervision 

or instruction concerning use of the appliance by a 

person responsible for their safety. 

 

Children should be supervised to ensure that they 

do not play with the appliance. 

 

Cleaning and user maintenance shall not be made 

by children without supervision. 

 

 

RETAIN THIS MANUAL FOR FUTURE REFERENCE 

WARNING 

In a prominent location, post the emergency 

telephone number of your local gas supplier and 

instructions to be followed in the event you smell gas. 

Instructions to be followed in the event the user 

smells gas shall be obtained by consulting the local 

gas supplier. If the smell of gas is detected, 

immediately call the emergency phone number of 

your local gas company. They will have personnel 

and provisions available to correct the problem. 

 

WARNING 

Do not spray aerosols in the vicinity of this appliance 

while it is in operation.

 

 

WARNING 

For your safety, do not store or use gasoline or other 

flammable vapors and liquids in the vicinity of this or 

any other appliance.

 

 

WARNING 

Improper installation, adjustment, alteration, service, 

or maintenance can cause property damage, injury, 

or death. Read the installation, operation, and 

maintenance instructions thoroughly before 

installing or servicing the equipment.

 

 

IMPORTANT 

An electrical wiring diagram for the oven is located inside 

the machinery compartment. 

IMPORTANT 

It is the customer’s responsibility to report any concealed 

or non-concealed damage to the freight company. Retain 

all shipping materials until it is certain that the equipment 

has not suffered concealed shipping damage. 

NOTICE 

Contact your Middleby Authorized Service Agent to install 

and perform maintenance and repairs and if necessary to 

convert equipment for use with other gases. An authorized 

service agency directory is supplied with your oven and 

available here: https://middlebymarshall.com 

NOTICE 

Using parts other than genuine Middleby Marshall Factory 

manufactured parts relieves the manufacturer of all 

warranty and liability. 

NOTICE 

Middleby Marshall (Manufacturer) reserves the right to 

change specifications at any time. 

NOTICE 

The equipment warranty is not valid unless the oven is 

installed, started, and demonstrated under the supervision 

of a factory certified installer. 

NOTICE 

The equipment is only for professional use and shall be 

used by qualified personnel. 

 

Summary of Contents for X55G Series

Page 1: ...LATION MANUAL X70G X55G Series Gas Ovens Models X70G X55G Combinations Single Oven Double Oven Two Stack Triple Oven Three Stack 2021 Middleby Marshall Inc is a registered trademark of Middleby Marsha...

Page 2: ...ion RETAIN THIS MANUAL FOR FUTURE REFERENCE WARNING In a prominent location post the emergency telephone number of your local gas supplier and instructions to be followed in the event you smell gas In...

Page 3: ...erial and workmanship for which it is responsible The Seller s obligation under this warranty shall be limited to replacing or repairing at Seller s option without charge F O B Seller s factory any pa...

Page 4: ...yor Installation 22 E Final Assembly 23 F Conveyor Belt Reversal 23 IV ELECTRICAL CONNECTION 24 V GAS CONNECTION 24 A Gas Conversion 25 B X70G X55G Propane Conversion Kit 77601 25 SECTION 3 OPERATION...

Page 5: ...his patented system complements customers unique products especially fresh dough product providing continuous proofing and dough development throughout the baking cycle The X70G X55G Series gas ovens...

Page 6: ...ings shown above are maximum values for normal operation amperage draw will be less than the listed value NOTE Each oven includes a 6 ft cord with NEMA L6 20P plug Customer to provide NEMA L6 20R rece...

Page 7: ...od product through the oven F Crumb Pans Catches crumbs and other materials that drop through the conveyor belt s One crumb pan is located at each end of the lower unit s conveyor belt G High Limit Re...

Page 8: ...SECTION 1 DESCRIPTION 8 NOTES...

Page 9: ...Service Agent NOTICE There must be adequate clearance between the oven and combustible construction Clearance must also be provided for servicing and for proper operation IMPORTANT An electrical wiri...

Page 10: ...Single or Double Oven Option Base w 15 Legs Casters Top Kit P N 76771 for X70G P N 77086 for X55G Single or Double Oven Option Base w 10 Legs Casters Top Kit P N 77609 for X70G P N 77613 for X55G Tri...

Page 11: ...ORNER BRACE with SCREWS 3 4 61828 15 LEG WELDMENT 4 4 74319 6 CASTER with BRAKE 4 WHEEL 5 4 22450 0028 6 ADJUSTABLE LEVELING LEG with 3 4 STUD 6 16 21416 0003 WASHER FLAT 1 2 SS 7 16 2001045 SCREW CAP...

Page 12: ...7492 COVER ASSEMBLY CORNER BRACE 4 4 61828 15 LEG WELDMENT 5 4 74319 CASTER STUD with BRAKE 4 WHEEL 6 4 22450 0028 6 ADJUSTABLE LEVELING LEG with 3 4 STUD 7 16 21416 0003 WASHER FLAT 1 2 SS 8 16 20010...

Page 13: ...BLY CORNER BRACE 3 4 70049 10 LEG WELDMENT PS360G 4 4 74319 CASTER with BRAKE 4 WHEEL 5 4 22450 0028 6 ADJUSTABLE LEVELING LEG with 3 4 STUD 6 16 21416 0003 WASHER FLAT 1 2 SS 7 16 2001045 SCREWS CAP...

Page 14: ...92 COVER ASSEMBLY TOP CORNER BRACE 4 4 70049 10 LEG WELDMENT PS360G 5 4 74319 CASTER with BRAKE 4 WHEEL 6 4 22450 0028 6 ADJUSTABLE LEVELING LEG with 3 4 STUD 7 16 21416 0003 WASHER FLAT 1 2 SS 8 16 2...

Page 15: ...E ASSEMBLY X70 Series 2 1 77470 COVER TOP ASSEMBLY CORNER BRACE 3 4 70060 LEVELING CASTER 1650 LBS 4 16 21416 0003 WASHER FLAT 1 2 SS 5 16 2001045 SCREWS CAP HX HD 1 2 13X1 ZP 6 16 21426 0004 WASHER L...

Page 16: ...EVICE 2 1 77088 BASE ASSEMBLY X55 Series 3 1 77492 COVER TOP ASSEMBLY CORNER BRACE 4 4 70060 LEVELING CASTER 1650 LBS 5 16 A27721 WASHER LOCK 3 8 6 16 220373 SCREWS CAP HX HD 3 8 16X1 18 8 7 16 21416...

Page 17: ...The location of the serial plate is shown in Figure 4 in Section 1 A fused disconnect switch or a main circuit breaker customer furnished MUST be installed in the electric supply line for each oven c...

Page 18: ...m specifications are STRONGLY RECOMMENDED Deviating from these recommendations may affect the baking performance of the oven Gas Meter One or two cavities 750 cfh meter Three oven cavities 1200 cfh me...

Page 19: ...ht back to replenish the air that was exhausted A negative pressure in the kitchen can cause heat related problems to the oven components as if there were no ventilation at all The best method of supp...

Page 20: ...oven from moving too far when installed on casters Leg Extension and Caster Installation 2 Install one caster and one adjustable 6 leg onto each leg extension and tighten securely in place 3 Orient th...

Page 21: ...top oven cavity DO NOT stack X70G X55G ovens between PS770 PS570 oven units 3 Install the top panel using the screws included in the kit as shown in Figure 17 and Figure 18 Stacking Order C Restraint...

Page 22: ...belt by pulling it for about 2 to 3 feet 0 6 to 1 0m with your fingers The drive and idler shafts must rotate smoothly and the belt must move freely without rubbing on the inside of the oven 4 Check...

Page 23: ...oks along the sides of the other conveyor links See Figure 23 Install the conveyor into the oven See steps 1 4 Conveyor and Master Link Orientation E Final Assembly 1 Install the crumb trays underneat...

Page 24: ...as indicated on the wiring diagram Power connections are located under access cover NOTICE The terms of the oven s warranty require all start ups conversions and service work to be performed by a Mid...

Page 25: ...erformed by a Middleby Authorized Service Agent B X70G X55G Propane Conversion Kit 77601 Three 3 tasks must be performed to change the oven to operate on Liquid Propane gas Replace main orifices Figur...

Page 26: ...SECTION 2 INSTALLATION 26 Gas Train and Burner Assembly...

Page 27: ...ck press brings oven to active ON mode Pressing and holding will put oven into OFF mode If the temperature is over 200 F the blowers will remain on until the oven temperature drops below 200 F TEMPERA...

Page 28: ...ers will begin and the blower proving switches will engage permitting the heat circuit relay to engage The gas ignition dual module will begin its cycle and ignite the dual power burners B Adjusting t...

Page 29: ...nute period after which the screen backlight will shut off The oven will stay in this condition until it is started again with no outputs energized III PROGRAMMING INSTRUCTIONS MANAGERS MODE A Changin...

Page 30: ...needed to maintain temperature instead of cycling a gas valve on and off This is a most efficient and accurate way of controlling the temperature and eliminates the heat losses associated with the ON...

Page 31: ...the oven switched on NOTICE NEVER use a water hose or pressurized steam cleaning equipment when cleaning this oven To avoid saturating the oven insulation DO NOT use excessive amounts of water DO NOT...

Page 32: ...yor slightly 1 and push it forward into the oven 2 This removes the tension from the drive chain inset Remove the drive chain from the conveyor sprocket 6 Slide the conveyor out of the oven folding it...

Page 33: ...shown in Figure 29 AS EACH FINGER IS DISASSEMBLED WRITE THE LOCATION CODE FOR THE FINGER ON ALL THREE OF ITS PIECES This will help you in correctly reassembling the air fingers Disassembling the Air...

Page 34: ...e master links from each conveyor belt Then roll the belts up along the length of the conveyor to remove them from the frame Remove the two conveyor adjustment screws from the idler end of the conveyo...

Page 35: ...ve chain Install the chain cover Check the tension of the conveyor belt as shown in Figure 23 in Section 2 Installation The belt should lift about 3 and 4 76 101mm If necessary adjust the belt tension...

Page 36: ...r 1 HP Havantic 1 7 54727 Dual Ignition Module 1 8 59450 Modulating Gas Valve 1 9 76986 Hi Limit Thermostat 1 10 32108 Transformer 240 primary 24 secondary 1 11a b 73057 Main I O Board and Digital Dis...

Page 37: ...SECTION 4 MAINTENANCE 37...

Page 38: ...SECTION 4 MAINTENANCE 38 NOTES...

Page 39: ...t screws Conveyor not moving 1 Something has jammed the conveyor 2 Circuit breaker behind control panel has tripped 3 Chain sprocket or set screw has come loose 1 Turn power off Locate and remove jamm...

Page 40: ...nter key Unplug oven and plug in again Restart oven If unsuccessful call service for immediate repair HEATING ERROR shown on display and audible alarm sounds The oven has failed to preheat in the expe...

Page 41: ...SECTION 6 ELECTRICAL SCHEMATICS 41 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram G208 240 AC 50 60 Hz X70 76914 REV C...

Page 42: ...SECTION 6 ELECTRICAL SCHEMATICS 42...

Page 43: ...SECTION 6 ELECTRICAL SCHEMATICS 43 Wiring Diagram G208 240 AC 50 60 Hz X55 77605 REV B...

Page 44: ...SECTION 6 ELECTRICAL SCHEMATICS 44...

Page 45: ...SECTION 6 ELECTRICAL SCHEMATICS 45 NOTES...

Page 46: ...er than your Middleby Marshall Authorized Service Agent may void your warranty NOTICE Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of all w...

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