Unit installation

Installation - Mechanical
SCXF-SVX01K-EN 29
Installation Preparation
Before installing the unit, perform the following
procedures to ensure proper unit operation.
1. Position the unit and skid assembly in its final location.
2. Test lift the unit to determine exact unit balance and
stability before hoisting it to the installation location.
See “Unit Handling Procedure,” p. 28 for proper
rigging procedures and cautions.
3. Remove the skids from under the unit. See Figure 3,
p. 18. Refer to the “Skid Removal” section. If you find
internal damage, file a claim immediately to the
deli
vering carrier.
4. Remove the protective shipping covers from the unit.
5. Verify isolators are properly tightened for operation.
Se
e “Unit Vibration Isolator Option,” p. 29.
6. Tighten compressor isolator mounting bolts.Torque to
1
8 ft. lbs. (+ 2 ft. Lbs.)
Unit Vibration Isolator Option
Important: Vibration isolation is not necessary for the
unit since the factory internally isolates the
fan and compressors, thus creating double
isolation.Trane strongly recommends that
you consult a vibration specialist when
considering double isolation.In general,
Trane does not recommend double-
isolation.
If job requirements dictate unit isolators, use a housed-
spring isolator with a locating pin. Factory-provided unit
isolators are type CP and indicate the spring number on
the outer housing. See Figure 20, p. 29. Set the spring-type
vibration isolators in position before completing electrical,
piping, or duct connections.The 20-38 ton units require
four isolators per unit, and the 40-80 ton units require six
isolators per unit. Reference the isolator placement sheet
that ships with the isolators to indicate proper placement.
Unit Isolator Installation Procedure
Follow the procedure below to install isolators:
1. Position the isolators under the unit base referring to
the isolator placement sheet that ships with the unit
isolators. Lift one end of the unit at a time to position
the isolators. Fasten the isolators to the floor using
anchor bolts.
2. Level the unit by adjusting the isolator heights. Unit
weight
may cause the upper housing of the spring
isolators to rest on the lower housing. Maintain
clearances between 1/4 and 1/2”.To increase the
clearance, lift the unit off the isolator and turn the
leveling bolt counterclockwise. Verify that the unit is
level and the housing clearances are correct.The
maximum allowable difference between isolator
heights is 1/4”. Shim as required under the isolators.
Note: The unit is equipped with a positively sloped drain
pan to help indoor air quality (IAQ) and does not
require one corner of the unit to be pitched.
Figure 19. Gravity block location and dimensions for 90-110 ton units
Figure 20. Optional spring-flex vibration isolator (type
CP-1) for unit isolation