2
Rigging option 2 (size 080-178 units) uses an offset lifting
bar. The bar must be at least 8 ft (2.5 m) above the top of the
unit to reduce the risk of damage to the unit. The lift point of
this lifting bar must be over the center of gravity.
30GXN,R283-528 duplex chillers are shipped as two inde-
pendent units (see Table 1 for duplex unit designations). The
chiller is to be rigged and placed according to the rigging
instructions for each individual module.
For shipping, some domestic units and all export units are
mounted on a wooden skid under entire base of unit.
Skid can be removed before unit is moved to installation
site. Lift the unit from above to remove skid. On export units,
the top skid can be used as the spreader bars. Coil protection
must be removed before unit start-up. If the unit is shipped with
a shipping bag, it must be removed before start-up. On export
units with a full crate, the crate sides must be removed to facili-
tate rigging.
Remove shipping bracket on header end of the unit before
start-up.
If overhead rigging is not available, the unit can be moved
on rollers or dragged. When unit is moved on rollers, the unit
skid, if equipped, must be removed. To lift the unit, use jacks at
the rigging points. Use a minimum of 1 roller every 3 ft
(915 mm) to distribute the load. If the unit is to be dragged, lift
the unit as described above, and place unit on a pad. Apply
moving force to the pad, not the unit. When in its final location,
raise the unit and remove the pad.
Locate the unit so that the condenser airflow is unrestricted
both above and on the sides of the unit. See Step 1 — Inspect
Shipment, on page 1, for required clearances. The unit may be
mounted on a level pad directly on the base rails. A raised pe-
rimeter rail can be used, but is not required. If the unit is
mounted on a raised perimeter rail, fasten the unit to the rail
using the mounting holes provided. Once installed, the unit
must be level to within
1
/
8
-in. per foot (1 cm per meter) along
the long axis of the oil separator. This is required for oil return
to the compressor(s).
Do not point load the base rail of the unit. If point loading is
required (i.e., for spring isolators) the base rail must be support-
ed with a 24 x 4 in. (610 x 102 mm) plate at each mounting
location (see Fig. 27). Fasten the unit to the plates using the
mounting holes that are available (see Fig. 27).
DUPLEX MODELS WITHOUT CONNECTING TRIM
KIT — The A and B modules are to be piped in series with the
return water piped into the A module and the leaving chilled
water piped from the B module. A minimum of 3 feet is
required between the two modules in order to provide the
necessary interconnecting piping components.
DUPLEX MODELS WITH CONNECTING TRIM KIT —
The A and B modules are to be piped in series with the return
water piped into the A module and the leaving chilled water
piped from the B module. The two modules must be aligned
with no more than
1
/
8
in. difference in the distance from one
side to the other. The exact spacing is given in the installation
instructions for the trim kit.
Table 1 — 30GXN,GXR Duplex Combinations
Do not use forklift trucks on these units if no skid is
supplied. Damage to unit can result.
SIZE
30GXN,GXR
MODULE A MODULE B
283
153 138
303
163 138
328
178 153
353
178 178
370
225 150
373
253 138
390
264 135
393
253 153
415
264 160
418
268 153
450
225 225
453
228 228
475
249 225
478
253 228
500
249 249
503
253 253
525
264 264
528
268 268
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