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CG4 Gas Burner Approvals
The Beckett CG4 Gas Burner has been evaluated by UL and certified to meet the standards for Domestic Gas
Conversion Burners for the US and for Canada. The applicable standards met are ANSI Z21.17a-1998 and
CSA 2.7-M98 (AMERICAN NATIONAL STANDARD/CSA STANDARD FOR DOMESTIC GAS CONVERSION
BURNERS) and they address the burner requirements for the conversion of oil-fired appliances to gas. The
CG4 carries the cULus listing mark and is listed under UL file MH60758 for both Domestic Gas Conversion
Burner and Domestic Gas Conversion Burner Certified for Canada.
The nature of residential oil appliance fuel conversions makes it impractical to retest and certify the oil appliance
for power gas burners. ANSI Z21.17a was developed to provide the requirements for a gas burner that can be
used to convert an oil-fired appliance to a gas-fired appliance. ANSI Z21.17a is referenced for oil to gas burner
conversions by recognized national codes, such as NFPA 54 and the International Mechanical Code.
Beckett has designed and tested the CG4 to meet ANSI Z21.17a when the burner is installed to our
requirements, which are found in the Installation and Operation (I&O) Manual for our respective burner. The I&O
Manual is written to the referenced installation standards of ANSI Z21.8 (AMERICAN NATIONAL STANDARD
INSTALLATION OF DOMESTIC GAS CONVERSION BURNERS). Local inspectors shall require the contractor
to meet local codes and/or ANSI Z21.8, whichever is most restrictive and any additional manufacturer's
requirements as identified in the I&O Manual. These steps will satisfy building and occupant safety with
respect to the installation of our conversion burner. Heat exchanger warranties are at the sole discretion of the
appliance manufacturer. Most maintain the warranty when converted to gas.
Beckett has a growing list of appliances which have successfully been evaluated or verified for conversion to a
CG4 gas burner in our application lab. The Beckett manual clearly states:
•
"This equipment must be installed, adjusted and started by a qualified service agency that is licensed and
experienced with all applicable codes and ordinances and responsible for the installation and commissioning
of the equipment."
•
"Use test instruments to set combustion" and follow the recommended procedure to attain combustion
readings to which the CG4 should be set.
Included with each burner is a tag to be completed by the contractor once the installation is finished. It
is imperative that the tag be completed in its entirety by the installer, detailing the appliance and burner
information, as well as combustion readings and chimney information. This tag should be referred to during all
inspections as well as any time the burner is serviced.
The application testing process verifies the following burner performance criteria as tested on each approved
appliance:
•
Standard firing rate within the appliance manufacturer's input rating
•
Low air setting performance
•
High air setting performance and ignition at high air
•
Performance at recommended air setting
•
Positive chimney draft (+0.1" w.c.) performance at standard air setting
•
Negative chimney draft (-0.1" w.c.) performance at standard air setting
•
Acceptable stack temperature above 325°F at 90% reduced input rate
•
Cold air operation at standard air setting
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