Beckett CG15 - Manual (Page 2)

General Burner Description:
Install __________ Beckett Model ________ Gas Burner forced draft flame retention power gas burners.
Burners shall be capable of burning ______BTUs (natural gas or propane) with a specific gravity of _____(0.64
or 1.56) Gas Pressure supplied to the burner gas train connection shall be a minimum of _____ inches W.C.
(PSIG) at full high rate and a maximum of _____ inches W.C. at static conditions.
Each burner shall be listed by Underwriters laboratories and shall bear the appropriate UL label. In addition to
the UL requirements, all equipment and installation procedures will meet the requirements of CSD-1 (FM,
Swiss RE). Each burner shall be designed and constructed as an integrated combustion system package.
Burner Construction:
Burner housing shall be of cast aluminum construction. The burner mounting flange must support the burner
weight on the appliance independent of any support and shall be seal welded to air tube. Burners shall be
furnished with a stainless steel flame retention head, capable of withstanding temperatures up to 1400 degrees
F. The combustion head assembly shall incorporate an air diffuser, gas spuds downstream of air diffuser and
direct ignition electrodes. The combustion gun assembly shall be removable and have the ability to be set or
replaced. Full access to the burner combustion gun assembly shall be available without removing the burner
chassis from the appliance. Air required for combustion shall be supplied by a blower, mounted integral to the
burner. The blower wheel shall be of a forward curved “squirrel Cage” design and shall be directly driven by a
____HP, 3450rpm, _____volt, 60Hertz, ____Phase motor. Combustion air shall be controlled by a damper
actuator directly coupled to the damper shaft, linkage coupling is not acceptable. High fire and low fire air
settings are to be set by the limit stops of the damper actuator. Burner shall have a flame inspection window
positioned at the rear center of the burner housing. Flame shall be viewed without removing any covers.
Ignition:
The burner ignition system shall utilize natural gas or propane as the fuel source. The ignition spark shall be
generated by a 6000 volt electronic igniter, and directed by porcelain insulated electrodes located on the
combustion head assembly. Ignition shall occur only at the low fire rate, and only after the flame is proven shall
the high fire rate be enabled.
Gas Train:
The gas train shall consist of either a manual shutoff cock, redundant gas valve and regulating gas valve or
alternatively a manual shutoff cock, gas pressure regulator, redundant gas valve and a two position fluid
motorized valve. The gas train shall meet CSD-1 and include a manual reset low gas pressure switch and
manual reset high gas pressure switch.
Mode of Operation:
(Spec writer –select one of the following)
• Low-High-Off
Fuel gas flow rate shall be controlled by a diaphragm regulating gas valve or a gas pressure regulator
and a two position fluid motorized valve. Combustion air flow rate for both Low and High fire shall be
controlled with a linkage less damper motor and will be set for the optimum fuel/air ratio for both low
fire and high fire. The transition from low fire to high fire will be complete within 4 seconds without any