Table of Contents
Advertisement
N N o o t t e e s s : :
•
Isolation pads (refer to the figure in
"Isolation Pads," p. 21
each chiller unless spring isolators are
specified on the sales order.
•
The center support leg of the Duplex™
CenTraVac™ chiller is approximately 1/2 in.
(12.7 mm) shorter than the end support legs,
and a field-supplied steel shim of
appropriate thickness will be required under
the center support leg to ensure the chiller's
weight is evenly distributed. If isolation pads
are used, the shim used should be of the
same dimensions as the chiller's center foot,
or larger, and it should be placed under the
isolation pads. If isolation springs are used,
then any shims used with them should be
placed under the springs and must be large
enough to properly support the spring base.
Specific isolator loading data is provided in the unit
submittal package. If necessary, contact your local
Trane sales office for further information.
I I m m p p o o r r t t a a n n t t : : 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 6. Isolation pad and dimensions
A
A = 3/8 in. (9.5 mm)
B = 18 in. (457.2 mm)
C = 9 in. (228.6 mm)
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
CDHF-SVX01N-EN
are provided with
B
C
I I n n s s t t a a l l l l a a t t i i o o n n : : M M e e c c h h a a n n i i c c a a l l
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.
Figure 7. Isolation spring placement by shell size, and
evaporator and condenser length
middle
rear
left
rear
Condenser
Evaporator
left
front
middle
front
Spring isolators typically ship assembled and ready for
installation. To install and adjust the isolators properly,
follow the provided instructions.
N N o o t t e e : : Do NOT adjust the isolators until the chiller is
piped and charged with refrigerant and water.
I I m m p p o o r r t t a a n n t t : : 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.
N N o o t t e e : : 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.
I I m m p p o o r r t t a a n n t t : : 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.
N N o o t t e e : : 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 holes
drilled and tapped in the upper housing of each
isolator.
right
rear
210 D/D
250 D/D
250 M/M
250 X/X
right
front
21
Advertisement
Table of Contents
