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12 SCXG-SVX01B-EN
pre-installation
considerations
Installation
Installation Preparation
Before installing the unit, perform
the following procedures to
ensure proper unit operation.
1. Verify the floor or foundation is level.
Shim or repair as necessary. To ensure
proper unit operation, install the unit
level (zero tolerance) in both horizontal
axis. Failure to level the unit properly
can result in condensate management
problems, such as standing water
inside the unit. Standing water and wet
surfaces inside units can result in
microbial growth (mold) in the drain
pan that may cause unpleasant odors
and serious health-related indoor air
quality problem.
2. Allow minimum recommended
clearances for maintenance and
routine service. See “Service Access”
section on page 13.
3. Position the unit and skid assembly in
its final location. If unit shipped split-
apart, follow the procedure in the
“Split-Apart Unit Assembly” section
on page 16 before completing this
step. Test lift the unit to determine exact
unit balance and stability before
hoisting it to the installation location.
See Figure I-PC-7 and I-PC-8 on page 15
for typical rigging procedures,
including cautions and proper uses of
such equipment as fork lifts, spreader
bars, and hooks.
4. Remove the skids from under the unit.
See the “Rigging and Handling”
section on page 14. Refer to the “Skid
Removal” section on page 18. If you
find internal damage, file a claim
immediately to the delivering carrier.
5. Remove the protective shipping covers
from the unit. Refer to the “Unit
Protective Covers” section on page 35.
Note: Unit height and connection locations
will change if external vibration isolators are
used. The unit may be raised an additional
5-
7
/
8
inches with spring-type isolators.
Note: Unit height and connection locations
will change if the unit is constructed to be
split-a-part in the field. See unit submittal
drawings for connection locations.
6. Electrical supply power must meet
specific balance and voltage
requirements, as described in the
“Electrical Requirements” section on
page 33.
7. Water-cooled units only (model
SCWG): The installer must furnish and
install a condenser main and standby
water pump, cooling tower, pressure
gauges and all components for the
waterside piping. See the “Water
Piping” section on page 30 for general
waterside recommendations.
8. Air-cooled units only (model SCRG):
These units require field-installation of a
remote air-cooled condenser and
refrigerant piping. See the “Refrigerant
Piping” section on page 32 for general
piping recommendations.