Trane IntelliPak SCRF 25, Installation, Operation And Maintenance Manual

Page: 35 / 120

SCXF-SVX01Q-EN 35
Figure 17. Gravity block location and dimensions for 90 to 110 ton units
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,” p. 34 for proper
rigging procedures and cautions.
3. Remove the skids from under the unit. See Figure
3, p. 22 . Refer to the “Skid Removal” section. If you
find internal damage, file a claim immediately to
the delivering carrier.
4. Remove the protective shipping covers from the
unit.
5. Verify isolators are properly tightened for
operation. See “Unit Vibration Isolator Option,” p.
35 .
6. Tighten compressor isolator mounting bolts.
Torque to 18 ft/lbs. (plus/minus 2 ft/Lbs.)
Unit Vibration Isolator Option
IIm mp po orrtta an ntt:: 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 . 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
Use the following procedure 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.
N No otte e:: 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.
IIn nsstta alllla attiio on n -- M Me ecch ha an niicca all