Middleby Marshall PS540 Section Installation, V. Gas Supply For Gas Heated Ovens

SECTION 2

INSTALLATION

Electrical Junction

Cover Plate

Figure 2-12. Junction Connection Box

V. GAS SUPPLY FOR GAS HEATED OVENS

WARNING

During gas line pressure testing, observe the following precautions:

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 pressures in excess of 1/2 psig (3.45kPa).

2.The oven MUST be isolated from the gas supply piping system, by closing its individual shutoff valve, during any pressure testing of that system at test pressures equal to, or less than, 1/2 psig (3.45kPa).

3.If incoming gas line pressure exceeds

14″w.c. (35mbar), a separate regulator MUST be installed in the line on the inlet side of the safety valve for the oven.

CAUTION

To prevent damaging the control valve regulator of the oven during initial turn-on of gas, the individual shutoff valve MUST be opened very slowly. After initial turn-on of gas, the individual shutoff valve should remain open except during gas line pressure testing (refer to the preceding WARNING) and during necessary servicing and maintenance procedures.

Check the oven data plate (Figure 2-11) before making any gas supply line connections. The type of gas (natural or propane) being supplied to the oven must agree with data on the oven data plate.

Certain safety code requirements exist for the installation of gas ovens; refer to the beginning of Section 2 for a list of the installation standards. In addition, because a PS540-Series oven is equipped with casters for accessi- bility during servicing, the gas line connection shall be made with a connector that complies with the Standard for Connectors for Movable Gas Appliances, ANSI Z21.69 (in U.S.A.), or, if applicable, Connectors for Movable Gas Appliances, CAN/CGA-6.16 (in Canada), as well as a quick-disconnect device that complies with the Standard for Quick-Disconnect Devices for Use With Gas Fuel, ANSI Z21.41 (in U.S.A.), or, if applicable, Quick-Discon- nect Devices for Use With Gas Fuel, CAN6.9 (in Canada).

One gas line connection method is shown in Figure 2-13; however, the preceding requirements must be satisfied. The 90-degree elbow and the union shown in Figure 2-13 are not furnished; however, the flexible gas line is part of the installation kit.

On an oven equipped with casters, a cable restraint assembly must be installed to limit the movement of the appliance, without depending on the connector and quick- disconnect device or its associated gas line installation. The location where the Cable Restraint Assembly is to be attached to the oven is illustrated in Figure 2-8.

20