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Chiller Isolation
To minimize sound and vibration
transmission through the
building structure, and to assure
proper weight distribution over
the mounting surface, install
isolation pads or spring isolators
under the chiller feet.
Note: Isolation pads are
provided with each chiller unless
spring isolators are specified on
the sales order.
Specific isolator loading data is
provided in the until submittal
package. Also refer to Table 10. If
necessary, contact your local
Trane sales office for further
information.
Isolation Pads
When the unit is ready for final
placement, position isolation
pads end-to-end under the full
length of the chiller leg. The
pads measure 6" x 18" (152 x 457
mm). See Figure 6. No gaps
should be present between
pads.
Remember that the chiller must
be level within 1/4" (6 mm) over
its length and width after it is
lowered onto the isolation pads.
In addition, all piping connected
to the chiller must be properly
isolated and supported so that it
does not place any stress on the
unit.
CVGF-SVN02B-E4
Installation:
Mechanical
Figure 6. Isolation pad
5/16-3/8
"
(8-10 mm)
Spring Isolators
Spring isolators should be
considered whenever chiller
installation is planned for an
upper-story location. Spring
isolator selection and placement
information is presented in
Figure 7 and Figure 8.
Note: Three types of spring
isolators, shown in Tables 11-13
are used. Each type has its own
maximum loading
characteristics.
Spring isolators are typically
shipped assembled and ready
for installation. To install and
adjust the isolators properly,
follow the instructions given.
Note: Do not adjust the isolators
until the chiller is piped and
charged with refrigerant and
water.
1. Position the spring isolators
under the chiller as shown in
Figure 7 and Figure 9. Make
sure that each isolator is
centered in relation to the
tube sheet.
2. Set isolators on the sub-base;
shim or grout them as
necessary to provide a flat,
level surface as the same
elevation for all mountings. Be
sure to support the full
underside of the isolator base
plate; no not straddle gaps or
small shims.
3. If required, bolt the isolators
to the floor through the slots
provided, or cement the pads.
Note: fastening the isolators
to the floor is not necessary
unless specified.
4. If the chiller must be fastened
to the isolators, insert cap
screws through the chiller
base and into the holes
tapped in the upper housing
of each isolator. Do not allow
the screws to protrude below
the underside of the isolator
upper housing. An alternative
method of fastening the chiller
to the isolators is to cement
the neoprene pads.
5. Set the chiller on the isolators;
refer to the "Rigging" section
for lifting instructions.
The weight of the chiller will
force the upper housing of
each isolator down, perhaps
causing it to rest on the
isolator's lower housing.
Figure 9 illustrates spring
isolator construction.
37
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