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E.  Blower Belts

1.  To gain access to each blower belt compartment remove 

the four screws shown in Figure 4-8. Then, lift the rear 

shroud off its hangers.

 

If  access  to  the  blower  motors  is  required,  remove  the 

three mounting screws (two on the front of each shroud 

and one on the rear). Then, lift the end shroud straight up 

and off its hangers.

2.  Check each blower belt for cracking or excessive wear.
3.  Check for amount of belt deflection in the center of the 

belt, 1/2

 deflection is acceptable, see Figure 4-9.

4.  If necessary, replace belt.

IV. MAINTENANCE - EVERY 6 MONTHS

A.  Check that the oven is cool and the power is disconnected 

as described in the warning at the beginning of this Section.

B.  For gas ovens, clean and inspect the burner nozzel and 

electrode assembly.

C.  Check (and clean, if necessary) the oven venting system.
D.  Check  the  conveyor  drive  shaft  bushings  and  spacers. 

Replace the components if they are worn.

Figure 4-9 - Belt Deflection

Summary of Contents for PS770 Series

Page 1: ...rademark of Middleby Marshall Inc All rights reserved Middleby Cooking Systems Group 1400 Toastmaster Drive Elgin IL 60120 847 741 3300 FAX 847 741 4406 PS770 Series Gas Ovens P N 59026 July 1 2012 Re...

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Page 4: ...TIES 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 any action whether in breach of c...

Page 5: ...ments 9 B Recommendations 9 C Other Ventilation Concerns 9 Page IV ASSEMBLY 10 A Base Pad Legs Casters and Stacking 10 B Restraint Cable Installation 10 C Conveyor Installation 10 D Standoff Installat...

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Page 9: ...TION MANUAL 4 1 42612 KIT SUPPLEMENT SVCAGENCY LIST 5 1 33120 0056 PIPE BLK 1 1 4 X 54 6 1 22450 0130 BAG POLY4MIL 9 X 12 W MINI GRIP 7 1 59155 BUSHING HEYCO SB 1500 18 8 1 59099 Reflector 9 1 59098 B...

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Page 11: ...11 D STANDOFF INSTALLATION 1 Place screw P N 19A15144 through counter bored hole in standoff P N 48522 and screw into weld nut on rear shroud 2 Repeat procedure for both sides...

Page 12: ...ng wires noting which color wires assemble to the associated wires on the photo detector Remove the entire photo detector bracket Replace the assembly to the right hand side of the unit mirroring the...

Page 13: ...ven to determine the correct connections for the electrical supply lines Connect the supply as indicated on the wiring diagram CAUTION The terms of the oven s warranty require all start ups conver sio...

Page 14: ...ulating valve bypass settings Disconnect the manifold unions closest to the main burner and removethemanifoldassemblies fourscrewseach Removethe addition four screws holding the burner cores and slide...

Page 15: ...d displays the conveyor bake time Dual belt ovens have two displays single units have one A Main On Off Button B Conveyor Time Setting C Temperature Control Display E Energy Level Indicators E Energy...

Page 16: ...Pressing on this value allows the user to adjust the set point for the left side of the oven 5 Exit Returns to the main screen C Energy Mode Screen 1 Mode Two Pressing this button allows the user to s...

Page 17: ...fingers Oven is not up to operating temperature Conveyor may be jammed Allow oven to preheat Turnovenoff andallowtocool Checkconveyorforblockage Conveyor will not move SYMPTOM PROBLEM SOLUTION The int...

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Page 21: ...t for cracking or excessive wear 3 Check for amount of belt deflection in the center of the belt 1 2 deflection is acceptable see Figure 4 9 4 If necessary replace belt IV MAINTENANCE EVERY 6 MONTHS A...

Page 22: ...7 2 M9616 FAN COOLING 8 2 57288 MOTOR BLOWER 9A 1 60837 AIR SWITCH BURNER BLOWER MOTOR 9B 2 60598 SWITCH AIR 13 WC 10 1 54727 IGNITION MODULE 11 1 M9887 ASSEMBLY BURNER BLOWER MOTOR 12 2 60539 VALVE M...

Page 23: ...23 Wiring Diagrams electrical schematics Middleby Marshall Model Number G208 240 volt 50 60 Hz 1 Phase 54745 Rev J...

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