CLM - Atmospheric Series
“Compliance+” Ultra Low NOx Water or Steam Boilers
Air Assisted Gas Fired – Sub 12 PPM
Burner must be Ultra Low NOx type for reduced
emissions service. Burner NOx reduction strategy
shall reduce the production of NOx by controlling
low excess air operation and reducing flame
temperature. Optimum stoichiometry shall be
maintained by a fuel metering control with
adjustments through the modulating range
assuring NOx reduction and high fuel efficiency.
Please delete these paragraphs from
the standard CLM Series Boiler Sample
Specification:(Form 2137 or 2138)
GAS BURNER AND CONTROL EQUIPMENT
The gas burner assembly shall be an integral
part of the boiler. Burners shall be tubular alloy
steel atmospheric type for operation with natural
draft, requiring no motor or blower. Gas pilot is
to be electrically ignited.
The special metal fiber burners are provided to
assure the main flame is combusted properly on
the burner head.
The natural gas firing, NOx emissions will not
exceed 12 ppm.
The following trim and controls shall be
furnished:
1. Pilot cock
2. Electronic pilot ignition
All emissions measurements are to be corrected
to 3% O2.
3. Gas pilot safety shutoff valve
4. Honeywell Flame Safeguard RM7890A
5. Main manual gas shutoff valve
6. Electric gas valve operator and auxiliary
safety shutoff gas valve (CLM120 &
CLM150)
7. Motorized gas valve operator and auxiliary
safety shutoff gas valve (CLM180 to
CLM300)
Control panel (16” x 20”) includes Honeywell
RMT840L Flame Safe Guard with UV scanner
Supply voltage 240-480/3/60 and includes a
control circuit air assisted transformer
Natural gas pressure required 20” min/28” max.
The control will have a 5 to 1 turndown.
8. High gas pressure switch (CLM270 to
CLM300)
9. Pilot and main gas pressure regulators
And substitute these paragraphs:
Ultra LOW NOX GAS BURNER AND
CONTROL EQUIPMENT *
The Bryan “Compliance +” boiler shall be
furnished with a UL listed air assisted Ultra Low
NOx – Gas burner suitable for operation with
natural gas. Burner shall be complete with
integral motor and blower for supplying sufficient
combustion air with normal vent conditions.
Form 2367
ꢀ Rev 04/21/06 Repl New ꢁ
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