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Unit Isolation
To minimize sound and vibration
transmission through the building
structure - and to assure proper
weight distribution over the
mounting surface, always install
isolation pads or spring isolators
under the chiller feet.
Note: Isolation pads (Figure 6) are
provided with each chiller unless
spring isolators are specified on the
sales order.
Note: The center support is
approximately 1/2" shorter (higher)
than the end supports. After unit
leveling, shim the center isolator
pads. If spring isolators are used,
shim the isolators for the center
support. See Figure 7.
Specific isolator loading data is
provided in the unit submittal
package. If necessary, contact your
local Trane sales office for further
information.
Important! When determining
placement of isolation pads or spring
isolators, remember that the control
panel side of the unit is always
designated as the unit front.
CDHF-SVN01B-EN
General Information
Isolation Pads
When the unit is ready for final
placement, position isolation pads
under the chiller feet as shown in
Figure 7.
Remember that the chiller must be
level within 1/16" 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.
Spring Isolators
Spring isolators should be
considered whenever chiller
installation is planned for an upper
story location. Base isolator selection
and placement on the information
presented in Figures 8-10a. (Notice
that 3 types of spring isolators - each
with its own maximum loading
characteristics are used with CDHF
chillers).
Spring isolators typically ship
assembled and ready for installation.
To install and adjust the isolators
properly, follow the instructions
given.
Figure 6 – Isolation Pad
5/16-3/8"
[8-10 mm]
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 Figures 8
and 9. Make sure that each isolator
is centered in relation to the tube
sheet.
Note: Spring isolators shipped with
the chiller are not identical! Be sure
to compare the data provided in the
unit submittal package and Figures 8
through 10a to determine proper
isolator placement.
2. Set the isolators on the sub-base;
shim as necessary to provide a
flat, level surface at the same
elevation for the end supports,
and approximately 1/2" higher for
the center support. Be sure to
support the full underside of the
isolator base plate; do not straddle
gaps or small shims.
18"
[457 mm]
6"
[152.4 mm]
17
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