Middleby Marshall Model PS536 Gas Utility Rough-In Recommendations, Gas Conversion

ENGLISH

SECTION 2 - INSTALLATION

A.Gas Utility Rough-In Recommendations

The following gas system specifications are STRONGLY RECOMMENDED. Deviating from these recommendations may affect the baking performance of the oven.

Gas Meter - 650 cfh meter

Gas Line

•DEDICATED LINE from the gas meter to the oven

•2" (50.8mm) pipe for natural gas

•1-1/2" (38.1mm) pipe for propane

•Maximum length: 200' (61m). Each 90° elbow equals 7' (2.13m) of pipe.

B.Connection

Check the oven’s gas supply requirements before making the gas utility connection. Gas supply requirements are listed on the oven’s serial plate and in Table 1-5, Gas Orifice and Pressure Specifications (in Section 1, Description).

Check the serial plate to determine the type of gas (Propane or Natural) to be used with the oven.

Refer to the instructions in the gas hose package (included in the Installation Kit) before connecting the gas line. One gas line connection method is shown in Figure 2-14; however, compliance with the applicable standards and regulations is mandatory.

Inlet and regulated gas pressure readings can be taken using a “U” tube manometer at the tap locations shown in Figure 2- 15.

NOTE

In the USA, the installation must conform with local codes, or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1.

In Canada, the installation must conform with local codes, or in the absence of local codes, with the Natural Gas Installation Code, CAN/CGA-B 149.1, or the Propane Installation Code, CAN/CGA-B 149.2, as applicable.

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

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 the oven is equipped with casters, the gas line connection shall be made with:

•A connector that complies with the Standard for Connec- tors for Movable Gas Appliances, ANSI Z21.69 (in USA), or Connectors for Movable Gas Appliances, CAN/CGA-6.16 (in Canada), AND

•A quick-disconnect device that complies with the Standard for Quick-Disconnect Devices for Use With Gas Fuel, ANSI Z21.41 (in USA.), or, if applicable, Quick-Disconnect De- vices for Use With Gas Fuel, CAN1-6.9 (in Canada).

C.Gas Conversion

Where permitted by local and national codes, it is possible to convert ovens from natural to propane gas, or from propane to natural gas. Use the appropriate Middleby Marshall Gas Conversion Kit for the specific oven model.

CAUTION

The terms of the oven's warranty require all start-ups, conver- sions and service work to be performed by a Middleby Marshall Authorized Service Agent.

Figure 2-14 - Flexible Gas Hose Installation

90°

Elbow

To Gas

Supply Pipe

Union OR	Full-Flow
quick-
	Gas
disconnect
	Shutoff
device
	Valve
	Flexible
	Gas Hose

Figure 2-15 - Gas Burner and Piping Assembly

In-shot

Pilotburners (2) assembly

Modulating gas valve

Manifold

pressure tap

(where manifold gas pressure is measured)

Combination Gas

Control Valve

(Safety Regulator)

On/Off Switch

Always leave in “ON” position

Inlet pressure

tap (where

incoming gas

pressure is measured)

14