Middleby Marshall PS224 PS310, PS570 manual Conveyor Speed Controller Kit for PS200R68-series ovens

SECTION 3 - SERVICING COMPONENTS

Appendix - Instructions for Service Kit 44756 - Conveyor Speed Controller Kit

for PS200R68-series Ovens, 2/02

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847) 741-3300 • FAX (847) 741-4406

Instructions for Service Kit 44756

Conveyor Speed Controller Kit for PS200R68-series ovens

KIT COMPONENTS:
Qty.	P/N	Description
1	37337	Conveyor speed controller with digital display

144749 Cable assembly, PS200R68-series ovens

144757 Instructions, PS200R68-series oven conveyor speed controller kit

This Service Kit will update one Middleby Marshall PS200R68, PS220R68, or PS224R68 oven to operate using the current digital conveyor speed controller with keypad display (P/N 37337), instead of the previous controller with thumbwheel adjustment (P/N 42810-0133). If the oven is already equipped with controller P/N 37337, this Kit is not necessary; P/N 37337 may be used as a direct replacement for the existing controller.

WARNING

BEFORE PERFORMING ANY SERVICE WORK, THE ELECTRICAL POWER SUPPLY AND THE GAS SUPPLY MUST BE TURNED OFF.

1.Disconnect the oven from its electrical power supply at the circuit breaker/fused disconnect. For gas ovens, shut off the gas supply to the oven.

2.Identify the 24-pin control cable (female at both ends) that connects the rear of the remote box (on top of the oven) to the rear of the machinery compartment (on the side of the oven).

3.Remove and discard the cable.

4.Open the machinery compartment door and locate the conveyor speed control module.

5.One at a time, disconnect the leads from the terminals on the existing speed control module and connect them to the corresponding terminals on the new control module.

6.Remove the ribbon cable plug from its socket on the old speed control module, and attach it to the corresponding socket on the new control module.

7.Remove and discard the old control module from the in- side of the machinery compartment door.

8.Adjust the DIP switch settings on the new speed control module to the correct settings for the PS200-series oven with a 3-30 minute bake time range. These settings are

shown on the case of the controller and are also provided in Figure 1.

9.Install the new module in place. Close and fasten the machinery compartment door.

10.Temporarily remove the remote box from the top of the oven. Open the remote box.

11.Disconnect the thumbwheel unit’s ribbon cable plug from its socket on the remote board. Then, remove and dis- card the thumbwheel unit.

12.Install the new digital display unit in place. Connect its ribbon cable plug into its socket on the remote board.

13.Close the remote box and reinstall it atop the oven.

14.Install the new kit-supplied control cable between the back of the remote box and the back of the machinery compart- ment.

15.Restore the electrical and gas utility supplies to the oven.

16.Test the operation of the new conveyor speed controller to make certain that it is operating properly. The oven is now ready for operation.

Figure 1

DIP Switch Settings

Middleby Cooking Systems Group

1400 Toastmaster Drive

Elgin, IL 60120

(847) 741-3300 • FAX (847) 741-4406

Middleby Corporation Service

Hotline 1-800-238-8444

P/N 44757 • Rev. C • V1 • 2/02

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