Middleby Marshall PS360WB-U - Manual (Page 12)

12
ENGLISH
Figure 2-16 - Gas Burner and Piping Assembly
Multifunction
Gas Valve
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: 354 l /sec meter
• Three or four oven cavities: 566 l /sec meter
Gas Line
• DEDICATED LINE from the gas meter to the oven
• 50.8mm pipe for natural gas
• 38.1mm pipe for propane
• Maximum length: 61m. Each 90° elbow equals 2.13m of
pipe.
B. Connection
WARNING
Some procedures in this section may require conver-
sions, readjustments, or service on the oven's gas system.
Before performing these procedures, check that the main
gas supply valve and the circuit breaker/fused disconnect
are in the OFF ("O") position. After completing these proce-
dures, perform a gas leak test before operating the oven.
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. The installation, start-up and changes
required when changing from one gas type to another can be
performed ONLY by a certified professional.
NOTE: The gas supply connection should be according to
applicable ISO 228-1 or ISO 7-1 recommendations. All aspects
of the gas supply connection must comply with current IEC/CEE
requirements and with all applicable local, national, and inter-
national codes.
Check the oven’s gas supply requirements before making the
gas utility connection. Gas supply requirements are listed on
the oven’s serial plate.
Check the serial plate to determine the type of gas to be used
with the oven. Check that the gas type indicated matches the
local supply at the installation. If the gas type on the serial plate
does NOT match the local supply, directions for converting the
oven for use with other gases are described in Preparation for
Use with Various Gases, in this section.
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.
Orifice
(manifold)
pressure tap
Governor
disabled for
liquid
propane (LP)
operation
Governor
enabled for
natural gas
operation
Pilot pressure tap
Low Flame
Bypass Line
High Flame
Solenoid Valve
Gas Burner
Burner Blower
Supply (inlet)
pressure tap
Union
Pilot Line
Multifunction Gas Valve
Figure 2-15 - Flexible Gas Hose Installation
Appliance
Connection/Male
Nipple
Flexible
Gas Hose
Full-Flow Gas
Shutoff Valve
To Gas
Supply Pipe
90°
Elbow
SECTION 2 - INSTALLATION