background image

Vents on

front panel

of oven

Fan grills (3) on rear

of oven and control

compartment

Vents (2) on rear

of machinery

compartment

SECTION 4 - MAINTENANCE

WARNING

Possibility of injury from moving parts and electrical shock exists in this oven.  Switch off and lockout/tagout

the electric supply BEFORE beginning to disassemble, clean, or service any oven.  Never disassemble or clean

an oven with the BLOWER (

) switch or any other circuit of the oven switched on.

CAUTION

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 use a caustic oven cleaner, which can damage the bake
chamber surfaces.

NOTE

ANY replacement parts that require access to the interior of the oven may ONLY be replaced by a Middleby Marshall
Authorized Service Agent.  It is also strongly recommended that the 3-Month Maintenance and 6-Month Maintenance
procedures in this section be performed ONLY by a Middleby Marshall Authorized Service Agent.

WARNING

Before ANY cleaning or servicing of the oven, perform the following procedure:

1.

Switch off the oven and allow it to cool.  Do NOT service the oven while it is warm.

2.

Turn off the electric supply circuit breaker(s) and disconnect the electric supply to the oven.

When all cleaning and servicing is complete:

1.

If the oven was moved for servicing, return the oven to its original  location.

2.

If the restraint cable was disconnected to clean or service the oven, reconnect it at this time.

3.

Reconnect the electrical supply.

4.

Turn on the electric supply circuit breaker(s).

5.

Perform the normal startup procedure.

I.  MAINTENANCE - DAILY

A.

Check that the oven is cool and the power is discon-
nected, as described in the warning at the beginning of
this Section.

B.

Clean ALL of the cooling fan grills and vent openings
with a stiff nylon brush.  Refer to Figure 4-1 for the
locations of the grills and vents.

C.

Clean the outside of the oven with a soft cloth and mild
detergent.

D.

Check that ALL cooling fans are operating properly.

CAUTION:

If a cooling fan is not operating correctly, it must

be replaced IMMEDIATELY.  Operating the oven
without adequate cooling can seriously damage
the oven's internal components.

E.

Clean the conveyor belts with a stiff nylon brush.  This
is more easily accomplished by allowing the conveyor to
run while you stand at the exit end of the conveyor.
Then, brush the crumbs off the conveyor as it moves.

F.

Remove and clean the crumb trays.  If necessary, refer
to Figure 2-16 (in Section 2, Installation) when replacing
the crumb trays into the oven.

G. Clean the window in place.

Figure 4-1.  Cooling Vents and Grills

19

Summary of Contents for PS640 series

Page 1: ...Middleby Marshall Inc All rights reserved Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 847 741 3300 FAX 847 741 4406 PS640 Series Electric Ovens P N 60614 October 2007 PS640 S...

Page 2: ...ICE 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 su...

Page 3: ...ALLY THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE The foregoing shall be Seller s sole and exclusive obligation and Buyer s sole and exclusive remedy for a...

Page 4: ...9 B Stacking 10 C Restraint Cable Installation 10 D Conveyor Installation 11 E Standoff Installation 11 V FINAL ASSEMBLY 12 VI ELECTRICAL SUPPLY 13 Connection 13 UTILITY ROUGH IN DIMENSIONS AND POSIT...

Page 5: ...ent F Window Allows the user to access food products inside the baking chamber G Machinery Compartment Access Panel Allows access to the oven s interior and control components No user serviceable part...

Page 6: ...s Two Blowers at 1900 RPM Warmup Time 15 min SERIES PS640 ELECTRICAL SPECIFICATIONS Main Blower Control Circuit Phase Frequency Amperage Poles Wires Elements Voltage Voltage Draw 208 240V 208 240V 3 P...

Page 7: ...such construction shall in all cases extend not less than 12 inches 304mm beyond the equipment on all sides CAUTION For additional installation information contact your local Authorized Service Agent...

Page 8: ...59725 P N59726 PS640 Single Electric Oven 1 1 PS640 Double Electric Oven 2 1 PS640 Triple Electric Oven 3 1 PARTS LIST FOR SERIES PS640 ELECTRIC OVEN INSTALLATION KIT P N 47810 0008 Two required for d...

Page 9: ...1 1 60287 COMPLETE BASE WELDMENT 2 4 37900 0024 TOP PLATE LEG WELDMENT 3 2 22290 0009 SWIVEL CASTER W BRAKE FLAT PLATE 4 2 22290 0010 SWIVEL CASTER FLAT PLATE 5 32 220373 3 8 16 1 HEX SCREW SST 6 32 2...

Page 10: ...13 HEX SCREW SST 6 32 21416 0001 3 8 FLAT WASHER SS 7 32 21422 0001 3 8 SPLIT LOCK WASHER ZP 8 1 22450 0228 RESTRAINT CABLE ASSEMBLY 9 1 59560 TOP COVER 10 2 59677 SCR MS SL TR HD 10 32 2 1 2 11 2 7A2...

Page 11: ...83 SPLIT LOCK WASHER ZP 10 16 21172 0004 3 83 16 NYLON INSULATED LOCKNUT ZC 11 8 2001048 1 23 13 x 1 3 8 18 8 HEX CAPSCREW 12 8 A27750 1 23 18 8 FLAT WASHER 13 8 21422 0016 1 23 18 8 LOCK WASHER 14 2...

Page 12: ...trimental effects can result from extreme seasonal hot and cold tempera tures from the outdoors NOTE Return air from the mechanically driven system must not blow at the opening of the baking chamber P...

Page 13: ...rs supplied in the Installation Kit The locking casters should be installed at the FRONT of the oven The non locking casters should be installed at the REAR of the oven 4 Install the lower oven cavity...

Page 14: ...ng the screws included in the base pad kit as shown in Figure 2 10 Figure 2 9 Stacking Figure 2 10 Top panel installation C Restraint Cable Installation Because the oven is equipped with casters a res...

Page 15: ...2 3 feet 0 6 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 the tension of the conveyor belt as...

Page 16: ...ack onto the frame in thereversedirection andreinstallthemasterlinks Replacethe conveyor assembly in the oven RESETTING DIRECTION JUMPER Locate Jumper P1 on the conveyor control board Move jumper from...

Page 17: ...FOR ELECTRICALLY HEATED OVENS Power requirements for electrically heated ovens are usually 208 240VAC 3 phase 4 wire 3 hot 1 ground although ovens built for export can have power requirements of 380V...

Page 18: ...it 3 pole 4 wire system per oven 3 hot 1 grd Do NOT use conduit for ground or EXPORT 380V elements 3 Ph 40 Amp draw 50 60 Hz 208 240V control circuit and main blower motor 4 pole 5 wire system per ove...

Page 19: ...elow 200 F B Conveyor Time Setting Adjusts and displays the conveyor bake time Dual belt ovens have two displays single units have one C Temperature Control Display Displays the set point of the oven...

Page 20: ...se temperatures respec tively When the proper temperature is entered push the Enter Reset button The controller will now show the display shown in Figure 3 3 2 Push the ON OFF button to start the oven...

Page 21: ...ake certain there are no products left on the conveyor in the oven 2 Press the ON OFF button to turn the oven off 3 Open the window to allow the oven to cool faster 4 After the oven has cooled and the...

Page 22: ...OLUTION The internal battery needs to be replaced to retain en ergy mode timings A qualified service technician should accomplish this Battery Symbol in the lower right hand corner Clean rear grills F...

Page 23: ...circuit breaker s and disconnect the electric supply to the oven When all cleaning and servicing is complete 1 If the oven was moved for servicing return the oven to its original location 2 If the re...

Page 24: ...to make sure that it can be reinstalled correctly Example of markings Top Row T1 T2 T3 T4 T5 T6 Bottom Row B1 B2 B3 B4 B5 B6 G Disassemble the air fingers as shown in Figure 4 3 AS EACH FINGERISDISAS...

Page 25: ...set screw on both of the conveyor drive sprockets Then remove the sprockets from the shaft 11 Check the conveyor configuration as follows High speed conveyors are equipped with large flange bearings a...

Page 26: ...is reached then tighten the bolts Figure 4 7 Rear panel access Remove eight 8 screws to remove rear panel Blower belt Bearings 2 total Blower motor Loosen four 4 screws to adjust motor position and b...

Page 27: ...LE 240V 8 1 51399 COOLING FAN BACKWALL 9 1 97525 COOLING FAN CONTROL COMPARTMENT 10 1 50610 AIR SWITCH 11 2 44914 CONTROLLER POWER 208V 240V 12 2 44568 CONTROLLER POWER 380V 480V 13 1 59942 HEATER 208...

Page 28: ...ection 4 procedure or call your Middleby Marshall Service Agency PROBLEM OVEN BLOWER AND CONVEYOR OPERATE YET THE OVEN IS NOT HEATING Start the oven again If the oven still does not heat call your Mid...

Page 29: ...25 SECTION 6 WIRING DIAGRAM Middleby Marshall Model Number E208 240 Volt 50 60 Hz 3 Phase 60227 Rev A4...

Page 30: ...26 Middleby Marshall Model Number E380 480 Volt 50 60 Hz 3 Phase 60231 Rev A4...

Page 31: ...27 NOTES...

Page 32: ...njury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment NOTICE During the warranty period ALL parts replacement and servici...

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