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Installation: Mechanical
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 front side of the unit.
Isolation Pads
When the unit is ready for final placement, position isolation
pads (18-in. [457.2-mm] sides) end for end under the full
length of the chiller leg. The pads measure 9 in. × 18 in.
(228.6 mm x 457.2 mm) and on some units there may be
small gaps between pads. Pads are provided to cover
entire foot.
Duplex™ CenTraVac™ chillers have pads for both ends,
plus pads for the support in the middle of the unit.
Figure 9. Isolation pad and dimensions
A
A = 3/8 in. (9.5 mm)
B = 18 in. (457.2 mm)
C = 9 in. (228.6 mm)
Table 9. Isolation spring placement
Width
EVSZ
CDSZ
in.
400M
440M
112.3
440X
440X
119.4
440M
440M
119.4
Spring isolators typically ship assembled and ready for
installation. To install and adjust the isolators properly,
follow the provided instructions.
Note: Do NOT adjust the isolators until the chiller is piped
and charged with refrigerant and water.
Important: Do NOT block any serviceable components
such as the lubrication system with field-
installed devices such as spring isolators.
1. Position the spring isolators under the chiller as shown
in the preceding figure. Ensure that each isolator is
centered in relation to the tube sheet.
24
B
C
Evap Width
cm
in.
cm
285.2
67
170.2
303.3
74
188.0
303.3
74
188.0
Remember that the chiller must be level within 1/16 in.
(1.6 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.
Spring Isolators
Spring isolators should be considered whenever chiller
installation is planned for an upper story location. Base
isolator placement is shown in the following figure; also
refer to the following table.
Figure 10. Isolation spring placement
2
Condenser
5
Evaporator
1
Length
Isolator
Config
in.
cm
312
792.5
3
360
914.4
3
312
792.5
3
Note: Spring isolators shipped with the chiller may not
be identical. Compare the data provided in the
unit submittal package 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 in. (12.7 mm)
higher for the center support.
Important: Support the full underside of the isolator
base plate; do NOT straddle gaps or small
shims.
3. If required, screw the isolators to the floor through the
slots provided, or cement the pads.
8
Condenser
9
Evaporator
7
Length
Origin to Center of
Origin to Center of
Rear Pad
Middle Pad
in.
cm
in.
105.8
268.7
60.5
112.9
286.8
67.5
112.9
286.8
67.5
CDHH-SVX003C-EN
4
6
Evap
Width
3
cm
153.7
171.5
171.5
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