Trane Modu manual Unit Vibration Isolator Option

Pre-Startup

Installation Requirements

Note: The compressors and fan assembly are internally isolated. Therefore, external isolation devices (spring mounting isolators) are at the discretion of a vibration specialist consulted by the building or HVAC system designer. In general, the Trane Company does not recommend double-isolation.

Unit Vibration Isolator Option

Vibration isolation is not necessary for the unit since the factory internally isolates the fan and compressors, thus creating double isolation.TheTrane Company strongly recommends that you consult a vibration specialist when considering 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 I-PR-3. Set the spring-type vibration isolators in position before completing electrical, piping, or duct connections. Units require four 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 to 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 posi- tively sloped drain pan to help indoor air quality (IAQ) and does not require one corner of the unit to be pitched.

Figure I-PR-3. Optional spring-flex vibration isolator (type CP-1) for unit isolation.

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