750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
8-19
8.14 — Fan/Motor Cassette Installation
B. Adjust the retainers for the correct impeller clearance at two housing attachment points 180º apart.
C. Adjust the retainers for correct clearance at the housing attachment points 90º from those initially adjusted.
D. Adjust for correct impeller clearance at the remaining attachment points.
5. Check and replace any gaskets that have been damaged. Gaskets that have been in use for one year or more
should be replaced. In particular, inspect the airbox gasket for damage.
8.14 — Fan/Motor Cassette Installation
FIGURE 8-23. Fan/Motor Cassette Open
To close the fan/motor cassette:
1. Check that all adjustment screws are tight, and check the linkage and IFGR damper for free movement before
closing the unit.
When replacing the airbox gasket, use only Cleaver-Brooks components. Failure to use components designed for this
application can result in improper combustion. Failure to follow these instructions could result in equipment damage.
Do not remove the davit arm assembly from the motor/fan cassette without first verifying that the cassette is securely
bolted to the boiler. Failure to follow these instructions could result in serious injury or death.
!
Caution
!
Warning
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