750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
6-1
CHAPTER 6 Adjustment Procedures
6.1 — Overview
Each Cleaver-Brooks boiler is tested for correct operation before shipment from the factory. However, variable
conditions such as burning characteristics of the fuel and operating load conditions may require further adjustment
after installation to assure maximum operating efficiency and economy.
A combustion efficiency analysis made during the initial startup will help to determine what additional adjustments
are required in a particular installation.
Prior to placing the boiler into service, a complete inspection should be made of all controls, connecting piping,
wiring, and all fastenings such as nuts, bolts, and setscrews to be sure that no damage has occurred, or that adjust-
ments have not changed during shipment and installation.
The adjustment procedures in Chapter 6 apply to standard components furnished on steam or hot water boilers
fired with gas and/or the various grades of oil.
6.1.1 — High Turndown Burner
In order to reduce stress on boiler components and to improve boiler operating efficiency, burners have been
designed for enhanced fuel turndown capabilities. A High Turndown Burner (HTB) is installed on boilers equipped
to fire light oil (Series 100), or gas (Series 700), or both (Series 200). Air and fuel inlets, the diffuser, and the air
damper control linkage have been modified for these burners.
Contact your local Cleaver-Brooks authorized representative or the Cleaver-Brooks Service Department for recom-
mendations covering special controls that are not included in Chapter 6.
NOTE: Observe that proper air damper linkage and fuel metering adjustment procedures are followed for standard
(Series 400 or 600) or HTB (Series 100, 200, or 700) burners to avoid damage to the equipment. The burner series is
identified on the boiler data plate affixed to the front head of the boiler.
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