Installation: Mechanical
20 CVHH-SVX001A-EN
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. Ensure that each isolator is centered in
relation to the tube sheet.
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.
Important: Support the full underside of the isolator
base plate; do 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
capscrews through the chiller base and into holes
drilled and tapped in the upper housing of each
isolator.
Important: Do NOT allow the screws to protrude below
the underside of the isolator upper housing,
or interfere with the adjusting bolts. 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
“ Standard
Chiller Lift,” p. 17
. The weight of the chiller will force
down the upper housing of each isolator, and could
cause it to rest on the isolator’s lower housing (refer to
Figure 8).
.
6. Check the clearance on each isolator. If this dimension
is less than 6.35 mm (1/4 in.) on any isolator, use a
wrench to turn the adjusting bolt one complete
revolution upward.
Note: When the load is applied to the isolators (
Step 5),
the top plate of each isolator moves down to
compress the springs until either the springs
support the load or the top plate rests on the
bottom housing of the isolator. If the springs are
supporting the load, screwing down on the
adjusting bolt (
Step 7) will raise the chiller.
7. Turn the adjusting bolt on each of the remaining
isolators to obtain the required minimum clearance of
6.35 mm (1/4 in.).
8. Once the minimum required clearance is obtained on
each of the isolators, level the chiller by turning the
adjusting bolt on each of the isolators on the low side
of the unit. Work from one isolator to the next.
Important: The chiller must be level to within 1.6 mm (1/
16 in.) over its length and width, and the
clearance of each isolator must be at least
6.35 mm (1/4 in.).
Leveling the Unit
The chiller must be set level within 1.6 mm (1/16 in.).
1. Measure and make a punch mark an equal distance up
from the bottom of each foot of the chiller.
Figure 8. Chiller foot and isolator orientation
Side View of Unit End View of Unit
Outsid e e dge
of tube sheet
Center tube
sheet
support leg
Center of
isolator
spring
Note: The spring isolator must be centered
in relation to the tube sheet. Do not
align the isolator with the flat part of
the chiller foot since the tube sheet is
often off center
Note: The lengt h of t he
isolator should
be parallel to the
leg.
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