Middleby Marshall PS200-R68 Do not Connect Black Lead to High LEG Black and White Must

CAUTION

DO NOT CONNECT BLACK

LEAD TO HIGH LEG

BLACK AND WHITE MUST

BE 120 VAC

High Leg Warning tag located on cover of electrical connection box of gas heated ovens.

IX. GAS SUPPLY FOR GAS HEATED OVENS

Check identification plate located on machinery compart- ment (see Figure 2-11) to determine type of gas (Pro- pane or Natural) to be used with the oven.

NOTE: If identification plate (Figure 2-11) is missing, natural or propane ovens can usually be determined by checking the manifold pressure rating on the gas combi- nation valve. The rating for natural gas is 3-1/2" w.c. The rating for Propane gas is 10.5" w.c.

Install the manual shutoff valve(s) enclosed with the oven on the 3/4" gas connection pipe extending through the control compartment at rear of oven control box.

If the rear of the oven is installed close to the wall, install the 3/4" elbow on the 3/4" gas connection pipe coming out the rear of the oven and then install the manual shutoff valve(s). This will prevent kinking the connection hose.

The minimum and maximum incoming line flow pres- sures (when oven(s) and all other gas appliances are on high flame cycle) should be the following:

Natural Gas: 6.0"w.c. Minimum, 14"w.c. Maximum Propane Gas: 11.5"w.c. Minimum, 14"w.c. Maximum

This incoming pressure reading can be taken by install- ing a gas pressure gauge in the inlet pressure tap of the main gas valve. See Figure 2-13. Outgoing pressure can be measured at the outlet pressure tap of the main gas valve.

Remember, the longer the pipe runs, the more pressure drops. One 90° elbow equals a 4 foot length of pipe.

NOTE

The installation must conform with local codes or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223, 1-latest edition

In Australia the installation must conform with AGA Code AG601 and with any requirements of the appropriate statutory authority.

CANADIAN:

CAN/CGA-B 149.1 Natural Gas

Installation Code

CAN/CGA-B 149.2 Propane

Installation Code

SECTION 2

INSTALLATION

On ovens equipped with casters, the installation shall be made with a gas connector that complies with the stan- dard for gas connectors for Moveable Gas Appliances, ANSI Z21.69-1987/CANI 6.10-88(or latest edition), and Addenda, Z21.69a-1989(or latest edition), and a quick disconnect device that complies with the standard for Quick-Disconnect Devices for Use With Gas Fuel, ANSI Z21.41-1989/CANI 6.9M79(or latest edition), and cable restraint assembly (refer to Figure 2-7) must be provided to limit the movement of the oven without depending on the connector and the quick-disconnect device or its associated piping to limit oven movement.

When an oven is required to be removed from its instal- lation for service, shut off the gas valve upstream of the gas connector. Disconnect gas connector, disconnect the restraining device, move oven for servicing.

When service is complete, place oven in original location, connect restraining cable device, connect gas connec- tor, turn gas valve on. Follow standard start up proce- dure.

Refer below to determine what size gas pipe to run to the oven (NOTE: each oven requires maximum BTU usage of 120,000 BTU per hour for a PS200-R68 or 100,000 BTU per hour for a PS220-R68 and PS224-R68.) The maximum total for a Double Oven would be 240,000 BTU per hour for a PS200-R68 or 200,000 BTU per hour for a PS220-R68 and PS224-R68.

RECOMMENDED SUPPLY PIPE SIZE:

Natural-

2" (51mm) ID for 1 or 2 oven cavities with runs up to 200 ft.(61m).

or

2-1/2" (64mm) ID for 3 or 4 oven cavities with runs up to 200 ft.(61m)

Must be a dedicated line. Runs over 200 ft. consult factory.

Propane-

1-1/2" (38mm) ID for 1 or 2 oven cavities with runs up to 200 ft.(61m).

or

2" (51mm) ID for 3 or 4 oven cavities with runs up to 200 ft.(61m).

Must be a dedicated line. Runs over 200 ft. consult factory.

NOTE: The recommended pipe sizes are larger than usually required to eliminate any operation problems. It is much less expensive to make the initial installment large enough to do the job rather than redoing the job later.

GAS METER SIZE: Minimum Gas Meter Size:

450 cu.ft./hour (3.2 liters/sec.) for single or double oven.

Add 180 cu.ft./hour (1.3 liters/sec.) for each additional cavity.

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