Middleby Marshall PS500 installation manual Gas Conversion

ENGLISH

SECTION 2 - INSTALLATION

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 1-3, 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 2-15; however, compliance with the applicable standards and regulations is mandatory.

Inlet, regulated, and pilot gas pressure readings can be taken using a “U” tube manometer at the tap locations shown in Figure 2-16.

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

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 Connectors for Movable Gas Appliances, ANSI Z21.69 (in U.S.A.), or, if appli- cable, Connectors for Movable Gas Appliances, CAN/CGA-6.16 (in Canada), as well as a quick-disconnect device that com-

plies with the Standard for Quick-Disconnect Devices for Use With Gas Fuel, ANSI Z21.41 (in U.S.A.), or, if applicable, Quick- Disconnect Devices 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 2-15 - Flexible Gas Hose Installation

To Gas

Supply Pipe

Full-Flow

Gas

Shutoff

Valve

90°

Elbow

90°

Elbow

Flexible

Gas Hose

Union OR quick- disconnect device

Figure 2-16 - Gas Burner and Piping Assembly

Gas line for			Inlet pressure
other oven	Manual	Cap for top	tap (where
cavities			incoming gas
	shutoff	oven cavity
			pressure is
	valve
			measured)
		Gas Pipe, 1-1/4”
		dia. X 54”	Modulating
		(1372mm) L
	Combination Gas		gas valve		On/Off Knob
	Control Valve
					Always leave in
	(Safety	Regulator)
					“ON” position
				Gas Burner

Nipple, 1-1/4”

dia. X 3”

(76mm) L, NPT

Elbow, 90°,

1-1/4” dia.

Pilot pressure tap	Manifold pressure tap
(where pilot gas	(where manifold gas
pressure is measured)	pressure is measured)

Burner Blower

12