Middleby Marshall PS745 Series, Owner'S Operating And Installation Manual

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5. If it is necessary to add or remove conveyor links to achieve
the correct tension, OR if it is necessary to reverse the
conveyor belt for correct orientation, the belt will need to
be removed from the conveyor frame. If this is necessary,
perform the following procedure:
• Remove the conveyor assembly from the oven and place
it flat on the floor.
• Remove the master links using long-nose pliers. Then,
roll up the belt along the length of the conveyor frame.
• Add or remove belt links as necessary to achieve the
correct belt tension.
• Replace the belt on the conveyor frame. Check that the
conveyor belt links are oriented as shown in Figure 2-15,
and that the smooth side of the conveyor belt faces UP.
• Connect the inside master links. Check that the links
are oriented as shown in Figure 2-15.
• Connect the outside master links. Note that the outside
master links each have an open hook on one side. This
hook aligns with the hooks along the sides of the other
conveyor links. See Figure 2-15.
• Replace the conveyor into the oven.
Figure 2-15. Conveyor and Master Link orientation
E. Final Assembly
1. Install the crumb trays underneath the conveyor as shown
in Figure 2-16.
Figure 2-16. Crumb Trays
Crumb tray
insertion
Direction
of travel
CORRECT
master link
position
Incorrect
master link
position
CONVEYOR BELT REVERSAL
Conveyor belt reversal consists of three steps:
1. Physically reversing the conveyor belt.
2. Reverse the brown and blue wire positions on the (-ARM)
and (+ ARM) positions on the speed controller.
REVERSING THE CONVEYOR BELT
Remove the conveyor from the oven and find the master link
location. Remove master links and remove the belt from the
conveyor frame. Reassemble the belt back onto the frame (in
the reverse direction) and reinstall the master links. Replace
the conveyor assembly in the oven.
CAUTION:
The Main Circuit Breaker MUST be in the “OFF”
position before performing any work inside the
electrical compartments.
Shock hazard in compartments, electrical filters
are electrically alive.
REVERSING THE DC GEARMOTOR
INPUT WIRES
Locate the -ARM and +ARM terminals on the speed controller.
With a Phillips screwdriver remove the brown wire from the
+ARM terminal. With a Phillips screwdriver remove the blue
wire from the -ARM terminal. Reconnect the brown wire to the
+ARM terminal by securing the brown wire with the connect-
ing screw. Reconnect the blue wire to the -ARM terminal by
securing the blue wire with the connecting screw.
VI. ELECTRICAL SUPPLY
WARNING: Authorized installation personnel normally ac-
complish the connections for the ventilation
system, electric supply, and gas supply, as
arranged by the customer. Following these
connections, the factory-authorized installer
can perform the initial startup of the oven.
NOTE:
The electric supply installation must satisfy the require-
ments of the appropriate statutory authority such as the
National Electrical Code, CSA C22.2; the Australian
Code AG601; or other applicable regulations.
NOTE: The electric supply connection must meet all national
and local electrical code requirements.
Check the oven serial plate before making any electric sup -
ply connections. Electric supply connections must agree with
data on the oven serial plate. The location of the serial plate
is shown in Figure 1-1 (in Section 1, Description).
A fused disconnect switch or a main circuit breaker (customer
furnished) MUST be installed in the electric supply line for each
oven cavity. It is recommended that the switch/circuit breaker
have Lockout/Tagout capability.
The supply conductors must be of the size and material (cop-
per) recommended. Refer to the wiring diagram inside the
machinery compartment of the oven. Electrical specifications
are also listed on the oven’s serial plate and in Table 1-3,
Electrical Specifications (in Section 1, Description).