Nemco 6900A240GF, 6900A208FF, 6900A240FF, 6900A240GG User Manual

SERVICE MANUAL

6900-( )-( )

HIGH SPEED SANDWICH PRESS

CAUTION

PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY

(a) Do not operate or allow the oven to be operated with the door open.

(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary:

(1) interlock operation.

(2) proper door closing.

(3) seal and sealing surfaces (arcing, wear, and other damage).

(4) damage to or loosening of hinges and latches.

(5) evidence of dropping or abuse.

(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connection.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in
this manual before the oven is released to the owner.

(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.

ELECTRICAL INSTALLATION

For all cord connected appliances:

GROUNDING INSTRUCTIONS

This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord
having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly
installed and grounded.

WARNING — Improper use of the grounding can result in the risk of electric shock.

Consult a qualified electrician or Serviceman if the grounding instructions are not completely understood
or if doubt exists as to whether the appliance is properly grounded.

Do not use an extension cord. If the power supply cord is too short, have a qualified electrician or
serviceman install an outlet near the appliance.

For a permanently connected appliance:

GROUNDING INSTRUCTIONS

This appliance must be connected to a grounded, metallic, permanent wiring system, or an equipment
grounding conductor should be run with the circuit conductors and connected to the equipment
grounding terminal or lead on the appliance.

SAFETY INSTRUCTIONS

PLEASE READ THIS ENTIRE PAGE BEFORE BEGINNING ANY SERVICE ACTIVITES

This manual is to assist the authorized service agent that has been trained by NEMCO on the proper
service procedures for this appliance.

If at any time the service agent is unsure how to properly or safely service the sandwich press; they should
contact NEMCO immediately for instructions.

All service technicians should check the microwave emission of the appliance using a calibrated
microwave survey meter before they begin any repairs.

The technician should check to make sure the sandwich press isn’t emitting microwaves when it
shouldn’t be.

The control should be checked to see if the control is running a menu cycle.

If it is determined that the service covers are needed to be removed, the oven should be unplugged
from its power receptacle, and the HV capacitors should be discharged using a high voltage insulated
10 MΩ resistor before performing service. Please NOTE: Turning the power switch off will not
completely protect the servicer from electrical shock.

If the microwave circuit must be operated with the service covers removed; DO NOT put any appendage
near any part of the HV circuit. Incidental contact with any part of the HV circuit while the magnetrons
are running WILL result in BODILY HARM or DEATH.

After service is completed, all the following MUST be checked before the sandwich press is plugged in:

- The device is correctly wired.

- All wiring is properly routed to avoid sharp edges or pinch points.

- All grounding points are properly secured and are in good condition.

- The lid closes properly.

- All the interlock switches function correctly, and are opening/closing in the correct order.

- The thermocouple wires have been correctly connected to the control board.

Once the sandwich press is plugged in, the following MUST be checked before allowing the customer to
operate the device:

- Verify that all the buttons on the control are functioning.

- Make sure the microwave emissions is less than 5 mW/cm

needed.

- Check the electrical current of the sandwich press.

- Verify that the specified exterior clearances are being used.

2

, adjust the choke placement as

Supply

Voltage

Frequency

Supply

Customer

Country

VVV

CC

208 = 208V

240 = 240V

60 Hz

L1+L2+Gnd (US 30A Plug)
L1+L2+Gnd (Canada 50A Plug)
L1+L2+Gnd (US/Canada 30A Plug)

GM=General

Market

US/Canada

Power

208V or
240V

208V 60Hz 28Amps
240V 60Hz 24Amps

Power Output

Microwave (combined)
Microwave (combined)
Heaters (combined)

2000W – Rated
1400W - Output
2000W – 1000W (each)

External
Dimensions
With The Upper
Enclosure Open

Height

Width

Depth

29 inches (737mm)

14.5 inches (368mm)

31 inches (787mm)

Weight

Total

135 lbs

Exterior Construction

Material

430 Stainless Steel

PRODUCT SPECIFICATIONS

Model Number: 6900-VVV-CC

INSTALLATION INSTRUCTIONS

Power Supply Requirements

The sandwich press MUST be connected to a properly grounded receptacle that is correctly rated for the
current listed on the device’s product label or MUST be hard-wired to the supply with a proper ground.

The sandwich press should be connected to its own power circuit (Type C or Time Delay circuit breaker).
Connecting this device to a circuit that is shared with other appliances could cause the circuit breaker to
trip when appliances with high inrush current turns on.

Ground Requirements

This device MUST be connected to a ground that meets or exceeds building codes. DO NOT install the
sandwich press in a location that doesn’t have a proper ground. Doing so could result in serious injury or
DEATH.

Appliance Positioning

To maintain sufficient ventilation for the sandwich press, you must have at least 2 inches (51mm) of
clearance on all sides of the unit and at least 2 inches above the upper enclosure when it is open. There

must also be at least 2” of clearance behind the flexible conduit with upper enclosure opened and closed.

Make sure that there isn’t any heat sources such as fryers, ranges, griddles, etc. If the sandwich press must

be located next to a before mentioned heat source, then a heat shield should be constructed between
the appliances to protect the sandwich press from the extreme heat and grease. Ignoring this warning will
result in voiding the manufacturer’s warranty.

FEATURES