CleaverBrooks 4WI, Operation, Service And Parts Manual

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Inspection and Maintenance
8-16 750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
8.11 — Air Control Damper, Linkage and Cam Spring
The burner air control damper should be checked for free movement as a part of the monthly inspection. With the
burner off and the jackshaft damper control rod disconnected, the air control damper should rotate freely through
its entire range of movement. Any resistance to movement or excessive play in the support bearing should be inves-
tigated and corrected before the burner is put back in operation.
The overall tightness of the linkage assembly should be checked
monthly. If necessary, tighten the setscrews and the connections at
the uniballs. Check the uniballs for wear and replace if necessary.
The linkage assembly should be tight but should not bind. If the
linkage assembly is binding, determine the cause of the binding
and correct as necessary.
Linkage rod end attachment points should be marked on the vari-
able displacement linkage arms as an aid in subsequent reassembly.
FIGURE 8-19.
Rotary Air Damper
Inspection of the air damper and linkage bear-
ings should be performed on a more frequent
basis if the boiler is operating in a dirty environ-
ment.
The fuel cam profile spring should be inspected
monthly for wear, scoring or distortion. If any of
the questionable conditions are found, the spring
must be replaced immediately to avoid the possi-
bility of breakage in service. Use care to avoid
damaging the cam or spring during installation.
FIGURE 8-20.
Front Linkage and Oil Cam
Lubricate occasionally with a non-gumming, dripless, high-temperature lubricant such as graphite or a silicone
derivative.
Combustion should be checked and readjusted as required whenever the burner is removed or any control linkage is
disturbed. Failure to follow these instructions could result in equipment damage.
!
Caution