Installation
AFDH-SVN004C-EN 37
1. Z-bracket
2. Weldment nuts (4 total on bracket, only 2 shown) drill out or grind
off flush.
1. Inspect the Z-bracket on the chiller motor flange. If the
Z-bracket is equipped with weldment nuts, these nuts
must either be ground off or drilled out to allow the
M8X25 bolts on the back of the new drive cabinet to
slide into the bracket at these locations.
2. Prepare lifting equipment and rigging.
a. Depending upon the model type, a unit-mounted
AFDH
can weigh up to 1400 pounds. Confirm the
weight of the AFDH unit to be installed. For E-Frame
units refer to Table.
b. Verify that the intended lifting device and rigging
has
the capacity to safely handle the load before
hooking up to the two factory provided lifting points
on top of the cabinet assembly.
c. Use the appropriate rigging techniques to ensure
that
the cabinet assembly will be balanced about its
center of gravity during lifting. Refer to
“Recommended Rigging and Lifting Procedures for
AFDH Drive Units,”.
3. Using safe lifting practices, carefully lift the cabinet and
position it over the brackets on the evaporator.
4. Slowly lower the cabinet until the lower mounting
bracket
makes contact with the evaporator brackets
but do not place the full weight of the cabinet onto the
brackets at this time. Keep tension on the lift rigging to
support the weight of the cabinet.
a. Adjust the position of the lower mounting bracket
as
necessary until the back of the cabinet is level
and lined up against the Z-bracket, then attach the
cabinet to the bracket using the kit hardware
provided (screws for the motor terminal access).
Shims may be necessary to level the lower
mounting bracket. The front edge of the evaporator
brackets may need to be ground down to allow for
more adjustment.
b. Secure the lower mounting bracket to the
evaporator
brackets with the bolts provided and
previously used (if needed) to secure the old starter
panel to them.
c. Ensure that all nuts are properly tightened at all
cabinet
mounting points.
5. Confirm that the drive is firmly attached to all brackets
and
is stable before slowly lowering the lifting device
to slacken the rigging and remove it from the lifting
points.
Figure 21. Removal of Z-bracket weldment nuts Figure 22. Transition mounting
1. Panel mounting plate
2. Evaporator mounting bracket
3. Bolt
4. Lockwasher
5. Washer
6. Washer
7. Nut
1
2
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