YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

SECTION 5 - TECHNICAL DATA
72
FORM 201.28-NM1.1
ISSUE DATE: 8/29/2012
TWO INCH DEFLECTION ISOLATOR INSTALLATION AND ADJUSTMENT
("A")
("E") CL
("G") ("E")
("A")
GROMMET
1. Read the following instructions before beginning
installation.
2. Isolators are shipped fully assembled and are to be
positioned in accordance with the submittal drawings
or as otherwise recomended.
3. Set isolators on floor, housekeeping pad, or subbase,
ensuring that all isolator centerlines match
the equipment mounting holes. The VMC group
recommends that the isolator base plates (“B”) be
installed on a level surface. Shim or grout as required,
leveling all isolator base plates to the same
elevation (0.25-inch maximum difference can be
tolerated).
4. Bolt or anchor all isolators to supporting structure
utilizing base plate thru holes (“C”) or weld base
plate to supporting structure with 0.375" fillet
weld 2” long @ 4” on center around entire base
plate or as engineered for specific load and or field
conditions.
5. Isolators are shipped to the job site with (2) removable
spacer shims (“E”) between the top plate
and the housing. These shims must be in place
when the equipment is positioned over the isolators.
6. With all shims (“E”) in place, position equipment
on top of plate (“A”) of isolator. Bolt equipment
securely to top plate of isolator using a minimum
1/4 - 3/8 GAP
WASHER
("F")
("C")
("B")
("F")
("C")
CL
("E")
EQUIPMENT
of 2 x 0.625" UNC A325 GRADE 5 SAE bolts or
weld equipment or bracket to the top plate (“A”)
of isolator with a minimum 0.375" fillet welds 2”
long @ 3” O.C. for a minimum total weld of 10”.
(All sides of equipment or bracket resting on top
plate (“A”) must be welded).
7. The adjustment process can only begin after the
equipment or machine is at its full operating
weight.
8. Back off each of the 4 limit stop lock nuts (“F”) on
the isolators 0.5”.
9. Adjust each isolator in sequence by turning spring
adjusting nuts (“G”) one full clockwise turn at a
time. Repeat this procedure on all isolators, one
at a time. Check the limit stop lock nuts (“F”)
periodically to ensure that clearance between the
washer and rubber grommet is maintained. Stop
adjustment of isolator only when the top plate
(“A”) has risen just above the shim (“E”).
10. Remove all spacer shims (“E”).
11. Fine adjust isolators to level equipment.
12. Adjust all limit stop lock nuts (“F”) per isolator,
maintaining 0.25-to 0.375-inch gap. The limit
stop nuts must be kept at this gap to ensure uniform
bolt loading during uplift (as the case when
equipment is drained).
JOHNSON CONTROLS