750-392
CBEX-DE
5-11
Fan/Motor Cassette Removal
FIGURE 5-5. Rotary air damper & actuator
Inspection of the air damper should be performed on a more frequent basis if the boiler is operating in a dirty
environment.
Lubricate occasionally with a non-gumming, dripless, high-temperature lubricant such as graphite or a silicone
derivative.
5.13 — Fan/Motor Cassette Removal
Before the boiler is commissioned at the job site, the Integral Flue Gas Recirculating (IFGR) system should be
visually inspected. The fan/motor cassette should be removed to expose the internal IFGR linkage and damper.
Remove the fan/motor cassette as follows:
1. Disconnect and lock out electric power to the boiler.
2. Be sure that the front door is securely bolted to the boiler.
3. Release the davit arm by removing the retaining bolt at the top center of the boiler.
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.
BEFORE removing the fan/motor cassette, disconnect and lock out electrical power to the boiler and ensure the front
door is securely bolted to the boiler. Failure to follow these instructions could result in serious injury or death.
"A"
DAMPER FULL OPEN
MODEL A B
250-400
43° 4.3°
500-800
45° 6.8°
1" REF.
"B"
HP
HP
!
Caution
!
Warning
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