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GAS KETTLES
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GAS CONNECTIONS
Gas supply connections and any pipe joint compound must be resistant to the action of
propane gases.
Codes require that a gas shutoff valve be installed in the gas line ahead of the kettle.
Connect the gas supply line to the gas valve on the kettle. Make sure the pipes are clean and free of
obstructions, dirt and piping compound.
The gas line must be capable of delivering gas to the kettle without excessive pressure drop at the rate
specified on the nameplate. Suggested gas supply line pressure is 7" Water Column (1.75 kPa) for
natural gas and 11" Water Column (2.75 kPa) for propane. Burner manifold pressure is (-)1.4" Water
Column (0.350kPa) for natural gas and (-)1.4" Water Column (0.350 kPa) for propane.
The proper sizing and installation of the gas connection is important for the machine to operate within
its design specifications. In some installations, the gas supply may not be sufficient enough to allow
all the gas equipment to operate properly at peak loads; or when other equipment with a high BTU/
hr. input requirement is operating. The connection to the machine becomes even more important in
this type of location. Flexible gas connectors with quick disconnect or swivel fittings (when used) and
gas connectors beyond the length necessary will reduce the BTU/hr. flow capacity to the machine.
NOTE: Do not use corrugated stainless steel tubing
for
commercial gas equipment supply connections.
NOTE: A straight gas connection is the ideal condition for the rated BTU/hr. flow capacity of the
connector. If a straight connection is not possible and a flexible gas connector is used, do not twist,
kink or excessively flex the connector beyond a U shape. Flexing the gas connector as described will
restrict gas flow or may damage the connector.
Changing a flexible gas connector may raise the BTU/hr. flow capacity enough to allow the machine
to
operate within its design specifications.
(i.e.
Removing the quick disconnect
fitting, installing a
shorter
gas connector or installing a larger diameter gas connector.) An alternative may be to move the
equipment to a different gas supply location in the kitchen. (i.e. Closer to the main supply into the
kitchen or away from other equipment with high BTU/hr. input requirements.)
KETTLE WALL KETTLE WALL
INCORRECT INSTALLATION CORRECT INSTALLATION
Prior to lighting, check all joints in the gas supply line for leaks. Use soap and
water
solution.
Do not use an open flame.
After piping has been checked for leaks, all piping receiving gas should be fully purged to remove air.