Bryan Boilers CLM Manuale utente

CLM - Atmospheric Series

“Compliance+” Ultra Low NOx Water or Steam Boilers

Air Assisted Gas Fired – Sub 12 PPM

Form 2367 Rev 04/21/06 Repl New Page 1 of 1

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 following trim and controls shall be

furnished:

1. Pilot cock

2. Electronic pilot ignition

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)

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.

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.

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.

All emissions measurements are to be corrected

to 3% O2.

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.

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