MK Plastics Axijet IO&M - Manual (Page 5)

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Floor Mounted Spring Vibration Isolators (Refer to Fig. 8)
Floor Mounted Vibration Isolators
To prevent vibration and noise from being transferred to the building, vibration isolators are recommended. Isolators should
be located between the fan and the rails. MK Plastics supplies two main types of isolators for Axijet fans:
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Floor Mounted Spring Isolators (steel & FRP Axijets)
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Floor Mounted Rubber-In-Shear Isolators (FRP Axijets)
In applications where seismic isolators are required, contact MK Plastics directly for further details
Fig. 8 – Spring Vibration Isolators (Assembly Detail - Typical)
Fig. 7 – Floor Mounted Vibration Isolators – (Typical)
Floor Mounted Rubber-In-Shear Isolators
1. Mount fan on rail supports (if supplied).
2. Elevate fan to provide room to insert isolators between the fan base and supports and block in position.
3. Position isolators under fan and secure bolts.
4. Remove blocks and allow fan to rest on the isolators. Isolators must be installed on a level surface (leveling should not
be required).
5. Secure isolators to mounting surface.
1. Locate the isolators in their proper position under the fan. The equipment support should be flat and level. Shims, if
required, should be full size.
2. Before the isolators are adjusted, the weight of the fan will cause the top plate to come to rest on the housing. The
isolators should be adjusted to provide a minimum clearance of ¼” between the top plate and the housing.
3. Install the adjusting and leveling bolts through the equipment mounting holes until the bolt comes into contact with
the spring cup. Back off the lock nut and compress the springs by turning the adjusting bolt clockwise. Start at one
isolator and make four turns on the adjusting bolt, move to the next isolator and make four turns, etc., until all isola-
tors have been adjusted four turns. Repeat this procedure until a ¼” clearance is obtained between top plate and
housing.
4. Check the level of the fan. The fan may now be leveled by making small adjustments of individual isolators at the
high and low points. The sleeves of the fan and isolation damper should be in line.
5. After the fan is level, visually check each isolator to make sure spring coils are not closed solid and there is suffi-
cient clearance between the top plate and housing.
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