Middleby Marshall PS555G GAS VII. GAS Supply, Rate regulator Must be installed in the line Before

Page 11

SECTION 2 - INSTALLATION

Figure 2-13 - Utility Connection Locations for Gas Ovens

Electrical

Junction Box One per oven cavity

Strain-relief

fitting

Gas Inlet

One per Single, Double, Triple, or Quad Oven

ENGLISH

Figure 2-14 - Utility Connection Locations for Electric Ovens

2" (51mm) cutout for electrical supply

VII. GAS SUPPLY

CAUTION

3. If incoming pressure is over 14” W.C. (35mbar), a sepa-

DURINGPRESSURETESTINGNOTEONEOFTHEFOLLOWING:

rate regulator MUST be installed in the line BEFORE the

1. The oven and its individual shutoff valve must be discon-

individual shutoff valve for the oven.

WARNING: To prevent damage to the control valve regula-

nected from the gas supply piping system during any

pressure testing of that system at test pressure in excess

tor during initial turn- on of gas, it is very important to open

of 1/2 psi (3.45 kPa).

the manual shutoff valve very slowly.

2. The oven must be isolated from the gas supply piping

After the initial gas turn-on, the manual shutoff valve must

system by closing its individual manual shutoff valve dur-

remain open except during pressure testing as outlined in

ing any pressure testing of the gas supply piping system at

the above steps or when necessary during service main-

test pressure equal to or less than 1/2 psi (3.45 kPa).

tenance.

 

 

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

One or two oven cavities: 750 cfh meter

Three or four oven cavities: 1200 cfh meter

Gas Line

DEDICATED LINE from the gas meter to the oven

2-1/2" (63.5mm) pipe for natural gas

2" (50.8mm) pipe for propane

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

11

Image 11
Contents Rev. B V2 11/01 PS500 Series Gas and Electric OvensEnglish Table of Contents II. Oven Components see Figure DescriptionOven Uses Electrical specifications for PS555G and PS570G gas ovens InstallationQuantity Base PAD KIT see FigureRecommendations Installation KIT see FigureIII. Ventilation System RequirementsConveyor Installation IV. Assembly2c. Legs/Casters Installation Quad Ovens Restraint Cable Installation10 Checking the conveyor tension Install the conveyor drive motor coverAdditional Information Electric Ovens Final AssemblyVI. Electrical Supply Additional Information Gas OvensSystem by closing its individual manual shutoff valve dur Rate regulator Must be installed in the line BeforeAbove steps or when necessary during service main VII. GAS SupplyGas Conversion 15 Flexible Gas Hose InstallationLocation and Description of Controls OperationII. Normal Operation STEP-BY-STEP III. Quick Reference Digital Temperature Controller IV. Quick Reference Troubleshooting Maintenance Daily MaintenanceWhen removing the conveyor, refer to -9 in , Installation II. Maintenance MonthlyLoosen the locking collar set screw, as shown in Figure III. Maintenance Every 3 MonthsSplit Belt Disassembly and Cleaning Remove the idler shaft assembly from the conveyorLubricating the Blower Fan Bearings IV. Maintenance Every 6 MonthsBlower Belts Item Qty Description KEY Spare Parts KIT Available separately. See FigureGas Ovens Electric OvensThermocouples Wiring DiagramsElectricalwiringdiagrams 380V or 480V, 50/60Hz, 3 Ph Important diagram for the oven is alsoAn electrical wiring Located inside the machinery compartment