VII. Electrical Supply, Connection | Middleby Marshall PS360-U

VII. ELECTRICAL SUPPLY

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: All aspects of the electrical supply connection must comply with current IEC/CEE requirements and with all applicable local, national, and international codes.

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 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. The circuit breaker/disconnect must have 3mm contact gaps breaking all poles of the supply. It is recommended that this circuit breaker/disconnect have lockout/tagout capability.

The supply conductors are to be 90°C-rated copper wiring. Additional wiring information is shown on the wiring diagrams in Section 5, Electrical Wiring Diagrams and inside the machin- ery compartment of the oven.

The oven requires a ground connection to the oven ground screw located in the electrical junction box. (The box is shown in Figure 2-14.) The ground connection must comply with current IEC/CEE requirements and with all applicable local, national, and international codes. If necessary, have the electrician supply the ground wire. Do NOT use the wiring conduit or other piping for ground connections!

SECTION 2 - INSTALLATION

A.Additional Information - Gas Ovens

All electric supply connections are made via the electrical junction box on the rear of the oven, shown in Figure 2-14. The power lines then connect to the oven circuits through safety switches located inside the machinery compartment and each blower motor compartment. These switches interrupt electric power to the oven when the Machinery Compartment Access Panel is opened, OR when either of the blower or rear shrouds is removed.

B.Additional Information - Electric Ovens

A cutout in the back wall of the machinery compartment provides access to the electrical supply connections. See Figure 2-14. The actual wiring connections are made at the electrical junction box.

C.Connection

Refer to the wiring diagram inside the machinery compartment, or in Section 5 of this Manual, to determine the correct connections for the electrical supply lines. Connect the supply as indicated on the wiring diagram.

If required by national or local codes, connect an equipotential ground wire to the lug next to the symbol. The equipotential ground connection must meet all applicable national and lo- cal code requirements.

ENGLISH

VIII. GAS SUPPLY

CAUTION

DURINGPRESSURETESTINGNOTEONEOFTHEFOLLOW- ING:

1.The oven and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressure in excess of 3.45 kPa.

2.The oven must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressure equal to or less than 3.45 kPa.

3.If incoming pressure is over 50mbar, a separate regu- lator MUST be installed in the line BEFORE the individual shutoff valve for the oven.

WARNING: To prevent damage to the control valve regu- lator during initial turn- on of gas, it is very important to open the manual shutoff valve very slowly.

After the initial gas turn-on, the manual shutoff valve must remain open except during pressure testing as outlined in the above steps or when necessary during service maintenance.

Figure 2-14 - Utility Connection Locations

Electrical

Junction Box

Gas ovens:

19mm pipe for

gas utility connection

Electric ovens:

Cutout for electrical

connection