Middleby Marshall PS200, PS570, PS360 English, Appendix - Instructions for All Gas Conversion Kits

SECTION 3 - SERVICING COMPONENTS

Appendix - Instructions for All Gas Conversion Kits

for Ovens with Wayne Burner, Propane to Natural Gas, 8/00

I.PREPARATION AND DISASSEMBLY

1.Turn off the electric power supply to the oven.

2.Turn off the gas supply at the service valve behind the oven.

3.Open the machinery compartment door.

4.Open the union in the gas supply line. The union is located on the inlet side of the combination gas control valve. See Figure 1.

5.Unscrew the four hex screws that hold the venturi mounting plate to the front of the burner. Remove the gas train/venturi assembly from the oven.

II.COMBINATION GAS CONTROL VALVE (SAFETY REGULATOR)CONVERSION

1.Remove and discard the following components from the combination gas control valve, as shown in Figure 2:

•Regulator cap screw

•Regulator adjustment screw

•Regulator spring

2.Install the stainless steel kit-supplied regulator spring, with the tapered end facing into the valve, as shown in Figure 2.

3.Install the kit-supplied regulator adjustment screw. Carefully adjust the screw until its top is flush with the top of the regulator.

4.Turn the adjustment screw six complete turns in a clockwise direction. This preliminary pressure setting is approximately 3-1/2” W.C. (8.7mbar).

5.Install the silver kit-supplied cap screw.

III. BYPASS ORIFICE CONVERSION

NOTE: Ovens are equipped with EITHER an on-off solenoid valve with a separate bypass line, OR with a modulating gas valve. Refer to the illustrations on Page 2. When installing this Kit, the bypass orifice will only be changed if the oven is equipped with a solenoid valve.

•If the oven is equipped with a modulating gas valve, skip ahead to Section IV, Pilot Orifice Conversion.

•If the oven is equipped with a solenoid valve, continue on to Step 1, below.

1.Unscrew the compression nuts at both ends of the bypass tube, and slide them back and out of the way. Then, remove and retain the tubing. See Figure 3.

2.Remove and discard the existing bypass orifice.

3.Slip the kit-supplied bypass orifice into the discharge end of the bypass tube, as shown in Figure 3.

4.With the orifice in place, push the tube back into the compression fittings until it bottoms.

5.While holding the tube in place, slide the compression nuts into place. Tighten them to a snug fit with your fingers.

6.Gently tighten the nuts one complete turn with a wrench. DONOTOVERTIGHTENTHECOMPRESSION

NUTS.3

Figure 1

Hex

screws

Gas pipe

union

PS570S gas train (with solenoid valve) shown.

Refer to the illustrations on Page 2 for

component placement for other oven models.

Figure 2

Adjustment

screw

Regulator

spring

Cap screw

Figure 3

Compression

nut

Bypass

orifice

Bypass

tube

ENGLISH

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