CleaverBrooks 4WI, Operation, Service And Parts Manual

Page: 135 / 216

750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual 8-17
8.12 — Fan/Motor Cassette Removal
8.12 — 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 lockout 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.
4.
Connect the davit arm to the fan/motor cassette using the suspension system shown in Figure 8-21.
5.
Arrange the attaching chains so the lifting point is over the motor shaft centerline and the center of balance for
the fan/motor cassette. This point is approximately 4 inches from the motor backplate for 600-800 HP units,
and 3 inches for 250-500 units.
6.
Remove the fan/motor cassette fastening nuts.
7.
Swing the fan/motor cassette to the side and secure it to the boiler using high strength cord. Do not over-
extend the motor wires.
FIGURE 8-21.
Fan/Motor Cassette
BEFORE removing the fan/motor cassette, disconnect and lockout 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.
When suspending the fan/motor cassette from the davit arm, all equipment used must be of adequate strength to
safely support the complete cassette. Failure to follow these instructions could result in serious injury or death.
! Warning
!
Warning