Middleby Marshall PS2020G Series Operation manual

PS2020G PS2620G Series
Gas Oven
Domestic & Standard Export
P/N: 79287
Revision B
October 12
th
, 2023
ENGLISH
PS2020G/PS2620G Series Gas Ovens
Model: Combinations:
 PS2020G Gas  Single Oven
 PS2620G Gas  Double Oven (Two-Stack)
 Triple Oven (Three-Stack)
OWNER’S OPERATING AND
INSTALLATION MANUAL
for Domestic & Standard Export Ovens
© 2023 Middleby Marshall Inc.
is a registered trademark of Middleby Marshall, Inc. All rights reserved.

ii
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.
AVERTISSEMENT
Mesure de sécurité, ne pas entreposer ni utiliser
d’essence ni autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre appareil.
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.
AVERTISSEMENT
L’installation, le réglage, la modification, la réparation ou
l’entretien incorrects de cet appareil peuvent causer des
dommages matériels, de blessures ou la mort. Lire
attentivement les instructions d’installation, de
fonctionnement et d’entretien avant de procéder à son
installation ou entretien.
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

iii
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.
RETAIN THIS MANUAL FOR FUTURE REFERENCE

iv
TABLE OF CONTENTS
SECTION 1 - DIMENSIONS ....................................................... 1
I. PS2020G DIMENSIONS..................................................... 1
II. PS2620G DIMENSIONS..................................................... 2
III. PS2020G GAS OVEN LAYOUTS ......................................... 3
A. Single Oven ............................................................... 3
B. Double and Triple Oven ............................................. 4
IV. PS2620G GAS OVEN LAYOUTS ......................................... 5
A. Single Oven ............................................................... 5
B. Double and Triple Oven ............................................. 6
SECTION 2 - INSTALLATION.................................................... 7
I. GENERAL ......................................................................... 7
II. CONSTRUCTION ................................................................ 8
III. INSTALLATION INSTRUCTIONS ............................................. 8
IV. DELIVERY AND INITIAL INSPECTION...................................... 8
V. LIFTING THE OVEN ............................................................ 8
VI. OVEN LOCATION AND PLACEMENT ...................................... 8
VII. INSTALLATION NEAR OPEN HEAT SOURCE ........................... 9
VIII. VENTILATION REQUIREMENTS............................................. 9
IX. GAS SUPPLY .................................................................. 10
X. DAILY CLEANING INSTRUCTIONS ....................................... 12
XI. WEEKLY CLEANING INSTRUCTIONS ................................... 13
SECTION 3 – OPERATION ...................................................... 15
I. DESCRIPTION OF CONTROLS –USER INTERFACE ............... 15
A. Standby/Splash Screen ........................................... 15
B. Preheat Screen........................................................ 16
C. Manual Cooking....................................................... 16
D. Preset Cooking ........................................................ 17
II. NORMAL OPERATION ....................................................... 18
A. Daily Start-up Procedure ......................................... 18
B. Adjusting the Temperature – Manual Mode............. 18
C. Adjusting the Belt Time – Manual Mode .................. 18
D. Adjusting Settings – Preset Mode............................ 18
E. Daily Shutdown Procedure (Turning the Oven Off).. 18
III. PROGRAMMING INSTRUCTIONS (MANAGER MODE) ............. 18
A. Changing Baking Blower Speeds (Manual) ............. 18
B. System Setup .......................................................... 18
C. Energy Management Information............................. 18
SECTION 4 – TROUBLESHOOTING ....................................... 19
I. PS2020G/PS2620G GAS OVEN KEY SPARE PARTS......... 20
SECTION 5 – WIRING DIAGRAM ............................................ 21

v
Model No. Serial No. Installation Date
MIDDLEBY MARSHALL
NO QUIBBLE LIMITED WARRANTY
(U.S.A. ONLY)
MIDDLEBY MARSHALL HEREINAFTER REFERRED TO AS
“THE SELLER”, WARRANTS EQUIPMENT
MANUFACTURED BY IT TO BE FREE FROM DEFECTS IN
MATERIAL 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,
ANY PART FOUND TO BE DEFECTIVE AND ANY LABOR
AND MATERIAL EXPENSE INCURRED BY SELLER IN
REPAIRING OR REPLACING SUCH PART. SUCH
WARRANTY SHALL BE LIMITED TO THE ORIGINAL
PURCHASER ONLY AND SHALL BE EFFECTIVE FOR A
PERIOD OF ONE YEAR FROM DATE OF ORIGINAL
INSTALLATION OR 18 MONTHS FROM DATE OF
PURCHASE, WHICHEVER IS EARLIER, PROVIDED THAT
TERMS OF PAYMENT HAVE BEEN FULLY MET.
This warranty is valid only if the equipment is installed, started,
and demonstrated under the supervision of a factory-
authorized installer.
Abuse, acts of God, belt jams, cleaning, customer abuse,
insufficient utilities, lubrication, maintenance, non-oven related
issues, preventative maintenance, or normal maintenance
function including adjustment of airflow, burners, conveyor
components, door mechanisms, microswitches, pilot burners,
thermostats, and replacement of bushings, light bulbs, fuses,
indicating lights and wear points, are not covered by this no
quibble limited warranty.
Seller shall be responsible only for repair or replacement of
defective parts performed by Seller’s authorized service
personnel. Authorized service companies are located in
principal cities throughout the contiguous United States,
Alaska, and Hawaii. This warranty is valid in the 50 United
States and is void elsewhere unless the product is purchased
through Middleby International with warranty adder included.
The foregoing warranty is exclusive and in lieu of all other
warranties, expressed or implied. There are no implied
warranties of merchantability or of fitness for a particular
purpose.
The foregoing shall be the Seller’s sole and exclusive
obligation and Buyer’s sole and exclusive remedy for any
action, including breach of contract or negligence. In no event
shall Seller be liable for a sum in excess of the purchase price
of the item. Seller shall not be liable for any prospective or lost
profits of the buyer.
This warranty is effective on Middleby Marshall equipment
sold on, or after January 1st, 2007.
© 2018 - Middleby Marshall, A Middleby Company.
MIDDLEBY MARSHALL
OVEN LIMITED WARRANTY
(Non U.S.A.)
The Seller warrants equipment manufactured by it to be free
from defects in material 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 part found defective and
any labor and material expense incurred by Seller in repairing
or replacing such part. Such warranty is limited to a period of
one year from the date of original installation or 15 months from
date of shipment from Seller’s factory, whichever is earlier,
provided that terms of payment have been fully met. All labor
shall be performed during regular working hours. Overtime
premium will be charged to the Buyer.
This warranty is not valid unless equipment is installed,
started, and demonstrated under the supervision of a
factory-authorized installer.
Normal maintenance functions including lubrication, adjustment
of airflow, thermostats, door mechanisms, microswitches,
burners and pilot burners, and replacement of light bulbs, fuses,
and indicating lights, are not covered by warranty.
Any repair or replacement of defective parts shall be performed
by Seller’s authorized service personnel. Seller shall not be
responsible for any costs incurred if the work is performed by
anyone other than the Seller’s authorized service personnel.
When returning any part under warranty, the part must be intact
and complete, without evidence of misuse or abuse, freight
prepaid.
Seller shall not be liable for any consequential damages of any
kind which occurs during the course of installation of equipment,
or which results from the use or misuse by Buyer, its
employees, or others, of the equipment supplied hereunder, at
Buyer’s sole and exclusive remedy against Seller for any
breach of the foregoing warranty or otherwise shall be for the
repair or replacement of the equipment or parts thereof affected
by such breach.
The foregoing warranty shall be valid and binding upon Seller if
and only if Buyer loads, operates and maintains the equipment
supplied hereunder in accordance with the instruction manual
provided to Buyer. Seller does not guarantee the process of
manufacture by Buyer or quality of product to be produced by
the equipment supplied hereunder and Seller shall not be liable
for any prospective or lost profits of Buyer.
The foregoing shall be Seller’s sole and exclusive obligation
and Buyer’s sole and exclusive remedy for any action, whether
in breach of contract or negligence. In no event shall Seller be
liable for a sum in excess of the purchase price of the item.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU
OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES
WHATSOEVER, SPECIFICALLY THERE ARE NO IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin, IL 60120 [phone] FAX [phone]
www.middleby-marshall.com

vi
NOTES

1
SECTION 1 - DIMENSIONS
I. PS2020G Dimensions
Figure 1: PS2020G Oven Dimensions – Side
Figure 2: PS2020G Oven Dimensions – Top
Figure 3: PS2020G Oven Dimensions – Front (Single)
Figure 4: PS2020G Oven Dimensions – Front (Double)
Exterior
Height 13.0" (330 mm)
--with legs 17.0" (432 mm)
Width 48.40" (1229 mm)
Depth 38.14" (969 mm)
Conveyor
Length 48.4" (1229 mm)
Width 20.80" (528 mm)
Electrical Specifications
North America
1 Phase
208/240 VAC
50/60 Hz
4.5 Amp-Run
3-wire supply
6 ft cord with NEMA# L6-20P plug for 250V, 1 phase.
Customer to provide NEMA# L6-20R receptacle.
20A minimum or breakers per local codes. Each oven to be
on an individual branch circuit.
Europe (CE)
1 Phase
220-230 VAC
50/60 Hz
4.5 Amp-Run
3-wire supply
No cord provided
20A minimum or breakers per local codes. Each oven to be
on an individual branch circuit.
Natural Gas
Supply (Inlet)
--Pressure 6-8" W.C. (14.9-19.9 mbar)*
Manifold
--Pressure 3.5" W.C. (8.7mbar)
Rated
--Heat Input 40,000 BTU (11.7 kW)
Propane Gas
Supply (Inlet)
--Pressure 12-14" W.C. (30.0-34.9 mbar)*
Manifold
--Pressure 10" W.C. (24.9 mbar)
Rated
--Heat Input 40,000 BTU (11.7 kW)
* The required gas supply pressures of other locations are
dependent on the local gas type and on all applicable local codes.

2
II. PS2620G Dimensions
Figure 1: PS2620G Oven Dimensions – Side
Figure 2: PS2620G Oven Dimensions – Top
Figure 3: PS2620G Oven Dimensions – Front (Single)
Figure 4: PS2620G Oven Dimensions – Front (Double)
Exterior
Height 13.1" (333 mm)
--with legs 17.1" (434 mm)
Width 48.40" (1229 mm)
Depth 44.09" (1120 mm)
Conveyor
Length 48.0" (1219 mm)
Width 26.75" (679 mm)
Electrical Specifications
North America (Option and Export)
1 Phase
208/240 VAC
50/60 Hz
4.5 Amp-Run
3-wire supply
6 ft cord with NEMA# L6-20P plug for 250V, 1 phase.
Customer to provide NEMA# L6-20R receptacle.
20A minimum or breakers per local codes. Each oven to be
on an individual branch circuit.
Europe (CE)
1 Phase
220-230 VAC
50/60 Hz
4.5 Amp-Run
3-wire supply
No cord provided
20A minimum or breakers per local codes. Each oven to be
on an individual branch circuit.
Natural Gas
Supply (Inlet)
--Pressure 6-8" W.C. (14.9-19.9 mbar)*
Manifold
--Pressure 3.5" W.C. (8.7 mbar)
Rated
--Heat Input 40,000 BTU (11.7 kW)
Propane Gas
Supply (Inlet)
--Pressure 12-14" W.C. (30.0-34.9 mbar)*
Manifold
--Pressure 10" W.C. (24.9 mbar)
Rated
--Heat Input 40,000 BTU (11.7 kW)
* The required gas supply pressures of other locations are
dependent on the local gas type and on all applicable local codes.

3
III. PS2020G Gas Oven Layouts
A. Single Oven

4
B. Double and Triple Oven

5
IV. PS2620G Gas Oven Layouts
A. Single Oven

6
B. Double and Triple Oven

7
WARNING – After any conversions, readjustments, or service work on the oven:
Perform a gas leak test Test for proper combustion and gas supply
Test for correct air supply, particularly to the burner Check that the ventilation system is in operation
WARNING – Keep the appliance area free and clear of combustibles.
WARNING – The oven must be installed on even (level) non-flammable flooring and any adjacent walls must not
be flammable. Recommended minimum clearances are specified in Section 1, Description of this manual.
WARNING – Do not obstruct the flow of ventilation air to and from the oven. There must be no obstruction
around or underneath the oven. Constructional changes to the area where the oven is installed shall not
affect the air supply to the oven.
CAUTION: To reduce the risk of fire, the appliance is to be mounted on floors of non-combustible construction with
noncombustible flooring and surface finish and with no combustible material against the underside thereof, or on
noncombustible slabs or arches having no combustible material against the underside thereof, such construction
shall in all cases extend not less than 12 inches (304 mm) beyond the equipment on all sides.
CAUTION: For additional installation information, contact your local Authorized Service Agent.
NOTE – There must be adequate clearance between the oven and combustible construction. Clearance must also
be provided for servicing and proper operation.
NOTE – An electrical wiring diagram for the oven is located inside the machinery compartment.
SECTION 2 - INSTALLATION
I. General
NOTE: All aspects of the oven installation, including placement, utility connections, and ventilation requirements,
must conform to any applicable local, national, and/or international codes. These codes supersede the
requirements and guidelines provided in this manual.
NOTE: In the USA, the oven installation must conform to local codes. In the absence of local codes, gas oven
installations must conform to the National Fuel Gas Installation Code, ANSI Z223.1. Gas and electric ovens, when
installed, must be electrically grounded in accordance with local codes, or in the absence of local codes, with the
Natural Electric Code (NEC), or ANSI/NFPA 70.
NOTE: In Canada, the oven installation must conform to local codes. In the absence of local codes, gas oven
installations must conform to the Natural Gas Installation Code, CAN/CGA-B149.1 or Propane Gas Installation
Code, CAN/CGA-B149.2, as applicable. Gas and electric ovens, when installed, must be electrically grounded in
accordance with local codes, or in the absence of local codes, with Canadian Electrical Code, CSA C22.2.
NOTE: In Australia, the oven installation must conform to AS/NZ5601 and carry local Authority or any other
relevant statutory regulations.

8
II. Construction
- 430 stainless steel front, top, sides, and back
- Cool to touch covers and panels
- Stainless steel interior
- 20-inch-wide cook chamber
III. Installation Instructions
The oven is designed and certified for safe operation when
installed in accordance with local and/or national codes. It is
the owner and/or installer’s responsibility to comply with any
codes that may exist. Install this oven according to the
policies and procedures outlined below and throughout this
manual.
WARNING
Death, injury, and equipment damage can result from
improper installation of a unit damaged during shipment
or storage.
WARNING
Do not install an oven suspected of damage. Improper
installation or the installation of a unit damaged during
shipment or storage may void the Limited Warranty.
IV. Delivery and Initial Inspection
All Middleby Marshall ovens are shipped so as to prevent
damage.
Upon delivery, inspect the shipping container for external
damage. Any evidence of damage should be noted on the
delivery receipt which must be signed by the driver.
Upon removing the oven from its shipping carton, check for
damage. Make note of any damage and contact the shipping
company to file a claim. Carriers will accept claims for
concealed damage if notified within fifteen days of the
delivery and if the shipping container is retained for
inspection.
Middleby Marshall does not assume responsibility for any
loss or damage suffered in transit. The carrier assumes full
responsibility for delivery in good order when the shipment is
accepted. However, when necessary, Middleby Marshall can
assist in filing a claim.
V. Lifting the Oven
WARNING
Two or more people are required to lift the PS2020G
(195 lb. [88.5 kg]) and PS2620G (260 lb. [118 kg]).
Position one or more people on either side of the oven. Lift
from the bottom. Never lift the oven from the front and rear.
Once properly positioned on the counter, plug the oven into a
wall mounted electrical receptacle. See Electrical
Specifications on page 1 for the PS2020G, page 2 for the
PS2620G.
VI. Oven Location and Placement
WARNING
Death, injury and equipment damage may result from
improper positioning.
WARNING
DO NOT stack ovens without stacking brackets. Contact
Customer Service for more information.
WARNING
DO NOT stack ovens more than three high.
It is the operator’s responsibility to ensure the oven is
properly positioned on countertop. Middleby Marshall will not
warrant any damage or injury to ovens that fall off
countertops due to improper placement.
Proper placement of the oven will enhance long-term
operator convenience and satisfactory performance. Be sure
to place the oven in an area accessible for proper operation
and servicing.
The surface on which the oven is placed must be at least 30"
(762 mm) deep and capable of supporting 200 lb. (90.7 kg)
for the PS2020G, and 265 lb. (118 kg) for the PS2620G
(weights are per oven). The manufacturer shall not assume
liability for damage or injury resulting from the improper
installation of this equipment including temporary or unstable
work stations or countertops.
The oven must be installed level front to back and side to
side. For additional stability, the oven legs may be bolted to
the countertop if desired.

9
VII. Installation Near Open Heat Source
When placing a Middleby Marshall oven near an open heat
source (see Figure 11), adhere to the following:
If the oven is being placed near a grill or stove, a
divider must exist between the oven and the open
heat source, with a minimum of 6" (152 mm)
between the oven and the divider.
If the oven is being placed near a fryer, a divider
must exist between the oven and fryer, with a
minimum of 12" (305 mm) between the oven and the
divider.
The height of the divider must be greater than or
equal to the height of the oven(s) – 13" (330 mm)
without legs or 17" (432 mm) with legs.
Verify oven location has a minimum 0" (0 mm)
clearance on each side.
VIII. Ventilation Requirements
PS2020G/PS2620G should be operated underneath a
ventilation hood.
To ensure continued compliance with all health, building,
and fire codes, you are required to maintain clean and
sanitary conditions around your oven at all times.
NOTE: In no event shall the manufacturer assume any
liability for damages or injuries resulting from installations
which are not in compliance with the instructions and codes
previously listed. Failure to comply with these instructions
could result in the issuance of a temporary cease and desist
order from the local health department until the environment
concerns are addressed.
Figure 11: Installation Near Open Heat Source

10
IX. Gas Supply
CAUTION
During pressure testing note all of the following:
1. The oven and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressure in excess of 1/2 psi (3.45 kPa).
2. The oven must be isolated from the gas supply
piping system by closing its individual manual
shutoff during any pressure testing of the gas
supply piping system at test pressure equal to or
less than 1/2 psi (3.45 kPa).
3. If incoming pressure is over 14" W.C. (35 mbar), a
separate regulator MUST be installed in the line
BEFORE the individual shutoff valve for the oven.
CAUTION
To prevent damage to the control valve regulator during
initial turn-on of gas, it is very important to open the
manual shutoff valve very slowly.
After the initial gas turn-on, the manual shutoff valve must
remain open, except during pressure testing as outlined in
the above steps or when necessary, during service
maintenance.
A. Gas Utility Rough-In Recommendations
The following system specifications are STRONGLY
RECOMMENDED. Deviating from these recommendations
may affect the baking performance of the oven.
Gas Meter
• One or two cavities: 250 CFH meter
• Three oven cavities: 850 CFH meter
Gas Line
• DEDICATED GAS LINE from the gas meter to the
oven
• 1" (25.4 mm) pipe for Natural gas
• 1" (25.4 mm) pipe for Propane gas
• Maximum length: 200' (61 m). Each 90° elbow equals
seven additional feet (2.13 m) of pipe.
B. Connection
Check the oven's gas supply requirements before making
the gas utility connection. Gas supply requirement are listed
on the ovenʼs serial plate.
Check the serial plate to determine the type of gas
(Propane or Natural) to be used with the oven.
Refer to the instructions in the gas hose package (included
in the Installation Kit) before connecting the gas line.
Compliance with the applicable standards and regulations is
mandatory.
Inlet, regulated, and pilot gas pressure readings can be
taken using a digital tube manometer at the tap location
shown in Figure 12. Figure 12 shows the burner assembly
and Figure 13 shows the gas valve.
NOTE: The installation must conform with local codes or in
the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1-latest edition.
Certain safety code requirements exist for the installation of
gas ovens; refer to the beginning of this manual for a list of
the installation standards. In addition, because the oven is
equipped with casters, the gas line connection shall be
made with a connector that complies with the Standard for
Connectors for Movable Gas Appliances, ANSI Z21.69 (in
U.S.A.), as well as a quick-disconnect device that complies
with the Standard for Quick-Disconnect Devices for Use
With Gas Fuel, ANSI Z21 .41 (in U.S.A.).
Figure 12. Gas Burner Assembly
Figure 13. Gas Valve

11
C. Gas Conversion
Where permitted by local and national codes, it is possible
to convert ovens from natural to propane gas, or from
propane to natural gas. Use the appropriate Middleby Gas
Conversion Kit for the specific oven model.
CAUTION
The terms of the ovenʼs warranty require all start-ups,
conversions and service work to be performed by a
Middleby authorized service agent.
D. PS2620G Propane Conversion (See Fig. 12 and 13)
Two items have to be changed, to change the oven to LP:
1. Replace main orifices: Disconnect the compression
fitting on the burner manifold and remove the gas
burner assembly. Remove the four burner screws to
remove the burners. This will expose the burner orifices.
Using a 9/16" open end wrench or 9/16" socket, remove
the Natural Gas orifices. Install the LP orifices into the
manifold assembly. Reinstall the burners and secure
with burner screws. Insert the burner box assembly into
place. Reconnect the tube with the compression fitting
to the manifold. Secure the compression fitting. Do not
over-tighten.
2. Adjust main gas regulator: Remove the regulator cap
and rotate the adjuster clockwise until it stops with no
additional force. This should put the output at
approximately 12" water column.
E. Adjusting the Maximum Pressure Setting
1. Disconnect pressure feedback connection (if
applicable).
2. Connect a suitable pressure gauge to pipe line or to
outlet pressure tap of gas control concerned, to
measure burner pressure (measuring point must be as
near to burner as possible).
3. Make sure that the appliance is in operation and the
Moduplus
®
coil is energized with maximum current.
4. If maximum rate pressure needs adjustment, use an 8
mm wrench to turn adjustment screw for maximum
pressure setting (clockwise to increase or counter-
clockwise to decrease pressure), until the desired
maximum outlet pressure is obtained.
5. Disconnect electrical connection of the Moduplus
®
.
6. Check minimum pressure setting and readjust if
necessary. (See Adjusting Minimum Pressure Setting
for proper adjusting procedure.)
7. Reconnect pressure feedback connection (if
applicable).
8. If minimum and maximum pressures are set, wire the
Moduplus
®
in circuit.
9. Close pressure tap screw.
F. Adjusting the Minimum Pressure Setting
1. Disconnect pressure feedback connection (if
applicable).
2. Connect a suitable pressure gauge to pipe line or to
outlet pressure tap of gas control concerned, to
measure burner pressure (measuring point must be as
near to burner as possible).
3. Disconnect electrical connection of the Moduplus
®
.
4. Energize operator, set control in operation and wait until
an outlet pressure is recorded on pressure gauge.
5. If minimum rate pressure needs adjustment, use a
5 mm nut driver to turn adjustment screw for minimum
pressure setting (clockwise to increase or counter-
clockwise to decrease pressure), until the desired
minimum outlet pressure is obtained.
6. Check if main burner lights easily and reliable at
minimum pressure.
7. Reconnect pressure feedback connection (if
applicable).
8. Close pressure tap screw.
G. Checkout
After any adjustment, set appliance in operation and
observe through a component cycle to ensure that burner
system components function correctly.
NOTE: The installer MUST verify oven operation prior to
putting oven into service.
H. Maintenance
IT IS RECOMMENDED TO CHECK YEARLY THE
MINIMUM AND THE MAXIMUM SETTING AND
READJUST THEM IF NECESSARY.

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X. Daily Cleaning Instructions
= Wash, rinse, sanitize.
(Use only mild detergent soap).
' = Completely dry with clean towel.
WARNING – Always disconnect power before cleaning or servicing oven.
WARNING – DO NOT attempt to clean the oven until it has cooled (screen reads "Oven Off").
WARNING – DO NOT use a water jet when cleaning the oven.
Step 1: Turn the Oven Off
Step 2: Remove Outer Oven Components
2.
3.
4.
5.
6.
7.
8.

13
XI. Weekly Cleaning Instructions
= Wash, rinse, sanitize.
' = Completely dry with clean towel.
WARNING – Always disconnect power before cleaning or servicing oven.
WARNING – DO NOT attempt to clean the oven until it has cooled (screen reads "Oven Off").
WARNING – DO NOT use a water jet when cleaning the oven.
Step 1: Turn the Oven Off Step 2: Remove Outer Oven Components
1.
2.
3.
4.

14
Step 3: Remove Inner Oven Components
Step 4: Clean Oven Components
1.
2.
Replace filters if damaged or torn.
3.
4.
Step 5: Replace Oven Components
1.
2.
3.
Step 6: Verify Chain Tension
Acceptable – Chain (A) is tight and easily clears
crumb tray holder (B).
Call service to have link removed – Chain (A) is
loose and risks contact with crumb tray (B).
Step 7: Ready the Oven for Use
1.
2.