750-211 (revised 2009)
Promethean Boilers, Model 4WI 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.
In order to reduce stress on boiler components and to improve boiler operating efficiency, burners have been
designed for enhanced fuel turndown capabilities. A burner is equipped to fire light oil (Series 100), heavy oil
(Series 600), or gas (Series 700), or both, Series 200 (for light oil and gas), and Series 400 (for heavy oil and gas). Air
and fuel inlets, the diffuser, and the air damper control linkage have been modified for these burners.
Contact the local Cleaver-Brooks authorized representative or the Cleaver-Brooks Service Department for recom-
mendations covering special controls that are not included in this chapter.
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.
For example: 4WI (model), 700 (fuel), 250 (HP), 150 (pressure)
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