Middleby Marshall Model PS536 Manual Do Utilizador

ENGLISH

SECTION 2 - INSTALLATION

VI. 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: 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.
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. It is recommended

that this switch/circuit breaker have lockout/tagout

capability.
The supply conductors must be of the size and

material (copper) 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 Tables 1-3 and 1-4, Elec-

trical Specifications (in Section 1, Description).
The oven requires a ground connection to the oven

ground screw located in the electrical junction box.

(The box is shown in Figure 2-13.) If necessary, have

the electrician supply the ground wire. Do NOT use

the wiring conduit or other piping for ground

connections!
A. Additional Information - Gas Ovens

All electric supply connections are made at the

terminal block located in the electrical junction

box, shown in Figure 2-13. The power lines then

connect to the oven circuits through a safety

switch located inside the machinery compart-

ment. This switch interrupts electric power to the

oven when the Machinery Compartment Access

Panel is opened.

B. Additional Information - Electric Ovens

A 1.3" (33mm) dia. cutout in the back wall of the machinery

compartment provides access to the electrical supply

connections. The actual wiring connections are made at

the terminal block located in the electrical junction box.
Using flexible cables for the electric power supply

conductors requires a 1.3" (33mm) strain-relief fitting (not

furnished with the oven) to enable safe access to the

terminal block.

C. Connection

Refer to the wiring diagram inside the machinery

compartment of the oven to determine the correct

connections for the electrical supply lines. Connect the

supply as indicated on the wiring diagram.

Electrical

Junction Box

1.3" (33mm) cutout for

electric utility connection

(electric ovens only)

Figure 2-13 - Utility connection locations

VII. GAS SUPPLY

CAUTION

DURING PRESSURE TESTING NOTE ONE OF THE FOLLOWING:
1. The oven and its individual shutoff valve must be discon-

nected from the gas supply piping system during any

pressure testing of that system at test pressure in excess

of 1/2 psi (3.45 kPa).
2. The oven must be isolated from the gas supply piping

system by closing its individual manual shutoff valve dur-

ing any pressure testing of the gas supply piping system at

test pressure equal to or less than 1/2 psi (3.45 kPa).

3. If incoming pressure is over 14 W.C. (35mbar), a sepa-

rate regulator MUST be installed in the line BEFORE the

individual shutoff valve for the oven.
WARNING: To prevent damage to the control valve regula-

tor 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 main-

tenance.

1/2" NPT pipe for gas

utility connection

(gas ovens only)