Middleby Marshall PS500 VII. GAS Supply, Duringpressuretestingnoteoneofthefollowing

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.

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