Installation Manual; Service Access; Electrical Connection; Gas Connection - Marshal MB42 Installation & Operating Manual

Installation must conform with local codes, or in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1, Natural Gas Installation Codes, CAN/CGA-B149.1, or the Propane
Installation Code, CAN/CGA-B149.2, as applicable.
1. The appliance and its individual shutoff valve must be disconnected from the gas supply
piping system at test pressures in excess of ½ psig (3.45kPa).
2. The appliance must be isolated from the gas supply piping system by closing its individual
manual shut-off valve during any pressure testing of the supply system at test pressures
in excess of ½ psig (3.45kPa).

SERVICE ACCESS

All service can be done through the Control Door opening and the Burner Door opening. An
access panel is located on the left side of the oven for more access to the controls. If this is
blocked off all service can be done from the front of the oven.

ELECTRICAL CONNECTION

A 15 AMP service must be provided for each oven. For 115 Volt usage, a cord and plug is
provided but connection to the electrical service must comply with local codes; or in the
absence of local codes, with the National Electrical Code, ANSI/NFPA No. 70 (or latest edition)

GAS CONNECTION

A ¾" NPT inlet is located at the rear of the oven. Undersized gas supply lines will restrict gas
supply and affect oven performance. If other appliances are supplied by the same supply
line the supply line must be sized to carry the combined volume without causing more than
½" pressure drop at the manifold of each appliance on the line at full rate. When installing a
stacked oven with one line, the line should be 1" to the tee and the 3/4" into each oven
NOTE: During installation, there will be air in the line. The air must be bled off before ignition
can be established.
GAS PIPING
A properly sized gas supply system is essential for maximum oven performance. Piping should
be sized to provide a supply of gas sufficient to meet the maximum demand of all appliances
on the line without loss of pressure at the equipment.

INSTALLATION MANUAL

Additional Gas Connection Instructions
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