Middleby Marshall PS314SBI installation manual English, VII. ELECTRICAL SUPPLY all ovens

SECTION 2 - INSTALLATION

VII. ELECTRICAL SUPPLY (all ovens)

WARNING

Authorized supplier personnel normally accomplish 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 requirements of the appropriate statutory authority, such as the National Electrical Code (NEC), ANSI/NFPA70, (U.S.A.); the Canadian 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.

NOTE: It may be necessary to temporarily remove the rear cool panels to connect the electrical supply.

Check the oven serial plate before making any electric supply connections. Electric supply connections must agree with data on the oven serial plate. The location of the serial plate is shown in Figure 2-16.

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 this 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 or control compartment of the oven. Electrical specifications are also listed on the oven's serial plate (Figure 2-16) and in the Electrical Specifications tables (on Pages 4-5).

The oven requires a ground connection to the oven ground screw located in the electrical junction box. (The box is shown in Figure 2-17.) If necessary, have the electrician supply the ground wire. Do NOT use the wiring conduit or other piping for ground connections!

Figure 2-16 - Oven Serial Plate

CAUTION

Before connecting incoming power to the oven, measure the voltage of each input leg to neutral. The expected voltage is approximately 120V. ANY voltage reading exceeding 130V indicates that the supply has a “high” leg. CONNECTING A “HIGH” LEG TO THE OVEN VOIDS ALL OVEN WARRANTIES. Connecting a “high” leg to the black lead of the oven can severely damage the oven’s electrical and electronic components.

CAUTION

DO NOT CONNECT BLACK WIRE TO HIGH LEG.

VOLTAGE OF THE BLACK AND WHITE WIRES MUST

BE NO HIGHER THAN 130 VAC.

A.Additional Information - Electric Ovens

For electric ovens, a 1-1/4" (32mm) dia. cutout in the back wall of the machinery compartment provides access for the electrical supply connections. See Figure 2-17. Using flexible cables for the electric power supply conductors requires a 1-1/4" (32mm) strain-relief fitting (not furnished with the oven) to enable safe access to the terminal block from which power is distributed to the oven.

B.Additional Information - Gas Ovens

All gas oven electric supply connections are made via the electrical junction box on the rear of the oven, shown in Figure 2-17. The power lines then connect to the oven circuits through the Machinery Compartment Access Panel Safety Switch. This switch interrupts electric power to the oven when the Machinery Compartment Access Panel is opened.

C.Additional Information - Ovens with External Transform- ers (export versions)

Position the transformer on the rear wall of the oven, on the same side as the control compartment, as space permits. Fasten it in place using the supplied mounting hardware.

D.Connection

Refer to the wiring diagram inside the machinery compartment or control compartment of the oven to determine the correct connections for the electrical supply lines. Connect the supply as indicated on the wiring diagram. Be sure to connect the electrical supply ground wire to the oven ground screw located in the junction box on the rear of the oven.

ENGLISH

	Serial plate location		Figure 2-18 -
			Flexible Gas Hose
		Rear cool
Figure 2-17 - Utility Connection Locations		panel	Installation
Gas oven	Electric oven	Rear wall
	1-1/4" (32mm) conduit for
Electrical		of oven	To Gas
junction box	electric utility connection
			Supply Pipe

Appliance

Connection/Male

Nipple

Full-Flow Gas

90°Shutoff Valve

Elbow

3/4" (19mm)
pipe for	Flexible
gas utility	Gas Hose
connection	11