Middleby Marshall PS314SBI installation manual English, VIII. GAS SUPPLY gas ovens only

ENGLISH

SECTION 2 - INSTALLATION

VIII. GAS SUPPLY (gas ovens only)

CAUTION

DURINGPRESSURETESTINGNOTEONEOFTHEFOLLOW- ING:

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 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 during 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 separate regulator MUST be installed in the line BEFORE the individual shutoff valve for the oven.

WARNING: To prevent damage to the control valve regulator 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 maintenance.

A.Connection

NOTE: It may be necessary to temporarily remove the rear cool panels to connect the gas supply.

Check the oven’s gas supply requirements before making the gas utility connection. Gas supply requirements are listed on the oven’s serial plate (Figure 2-16) and in the Gas Orifice and Pressure Specifications table (Page 4 of this manual).

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 2-18; 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 2-19.

One 90° elbow equals a 7’ (2.13m) length of pipe. 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.

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 complies 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).

B.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.

WARNING

All installations, conversions and service work must be performed by an authorized service agent.

Figure 2-19 - Gas Burner and Piping Assembly

Inlet pressure tap	Manifold pressure tap	Burner Blower
(where incoming
	(where manifold gas
gas pressure is
	pressure is measured)
measured)

On/Off Knob	High Flame
Always leave in
	Solenoid Valve
“ON” position
	Gas Burner

Combination Gas

Control Valve

(Safety Regulator)

Pilot pressure tap

(where pilot gas

pressure is measured)

Manual	Low Flame
shutoff valve	Bypass Line

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