Isolators
Installation without isolation
This method is
not
recommended as an option for YVAM chillers. Vibration isolation is an important
option that must be accounted for at chiller installation. If isolators are not ordered, they must
be selected based on the loading at the specific chiller locations. Contact Johnson Controls
representative for assistance if isolators have not been provided.
Installation of optional spring isolators
If ordered, spring type isolator assemblies are supplied with the unit. The isolator load rating can
vary based on the location on the chiller. This is due to the weight distribution of the unit and
the isolators must be located as prescribed in the technical data portion of the chiller submittal
package. See Figure 13 for locations. See Table 4 and Table 5 for details of the isolators.
Spring isolators are shipped fully assembled and must be positioned in accordance with the
submittal drawings or as otherwise recommended.
1. Set the isolators on the floor, housekeeping pad, or subbase, ensuring that all isolator
centerlines match the equipment mounting holes.
2. VMC Group recommends that the isolator base (B) be installed on a level surface. Shim or
grout as required, leveling all isolator bases to the same elevation. The maximum difference
that can be tolerated is 1/4 in. (6.35 mm).
3. Bolt or anchor all isolators to supporting structure using the base slotted holes (C).
4. Place the equipment on top of the isolators and make sure that the mounting holes of the
equipment line up with the isolator positioning pin (H).
5. The adjustment process can only begin after the equipment or machine is at its full operating
weight.
6. Adjust each isolator in sequence by turning the spring adjusting bolt (D) one full
counterclockwise turn at a time. Repeat this procedure on all isolators, one at a time.
7. Continue adjusting each isolator until a minimum of 1/4 in. (6.35 mm) clearance is achieved
between the lower housing and upper housing. See Figure 14.
8. To complete the installation, fine adjust the isolators to level the equipment.
YVAM Air-Cooled Centrifugal Liquid Chiller
20
