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Internal Ladder Installation (Optional)
1. Place ladder in the desired position within the unit.
See Figure 31.
2. Bottom of the ladder sits in the slotted panel of the internal walkway.
3. Secure the ladder with the locking pin to secure the top of the ladder to the ladder
support channel in the desired position.
4. Ladder can be moved as necessary to other fixed locations in the plenum.
Figure 31.
Internal Ladder
Detail B.
Upper Ladder Support
WARNING:
Ensure internal ladder
is pinned in place and securely
installed prior to use.
Detail A.
Lower Ladder Support
Internal Platform Ladder Installation (Optional)
For access to the motor and drive assemblies an internal ladder and upper service platform
with handrails is available for select models.
1. Attach the six ladder brackets provided to the casing wall.
2. Secure the internal platform ladder to the ladder brackets.
Ladder Brackets
Internal
Platform
Ladder
Figure 30.
Internal Platform Ladder