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Installation (Continued)
Removing Supply and Exhaust Fan Shipping Channels
(Motors >5Hp)
Each supply fan assembly and exhaust fan assembly for
S_HF units shipped with a motor larger than 5 HP is
equipped with rubber isolators, (as standard), or optional
spring isolators. Each supply fan assembly and exhaust fan
assembly for S_HG units is equipped with spring isolators.
Shipping channels are installed beneath each fan assembly
and must be removed. To locate and remove these chan-
nels, refer to Figure 3-8 and use the following procedures.
Rubber Isolators:
1. Remove and discard the shipping bolts from the fan as-
sembly rails.
2. Elevate the fan-and-motor assembly and slide the shipping
channels out from between the fan assembly rails and the
unit's base rail.
3. Lower the fan-and-motor assembly onto the isolators.
Make sure that the pins at the top of the isolators are en-
gaged in the corresponding holes on the fan assembly.
4. Verify that the fan assembly is being supported by the iso-
lators.
Spring Isolators:
Spring isolators for the supply and/or exhaust fan are
shipped with the isolator adjusting bolt backed out. Field
adjustment is required for proper operation. Figure 3-8
shows isolator locations. To adjust the spring isolators
use the following procedure.
1. Remove and discard the shipping tie down bolts but
leave the shipping channels in place during the adjust-
ment procedure. See Figure 3-8.
2. Tighten the leveling bolt on each isolator until the fan
assembly is approximately 1/4" above each shipping
channel.
3. Secure the lock nut on each isolator.
4. Remove the shipping channels and discard.
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