Unit Isolation; Direct Mounting; Neoprene Isolators; Unit Leveling - Trane RTAA-70 Installation & Maintenance Manual

Installation — Mechanical

Unit Isolation

There are two mounting methods that will minimize sound and vibration
problems. They are the direct-mount method and the isolator-mount method.

Direct Mounting

The unit can be direct-mounted on an isolated concrete pad or on isolated
concrete footings at each mounting location. Refer to Figure 13 for unit
operating weights. A mounting hole is provided in the base of the unit frame
at each mounting location. Provide a means of securely anchoring the unit to
the mounting surface. Level the unit carefully. Refer to "Unit Leveling" .

Neoprene Isolators

Install the optional neoprene mounting isolators at each mounting location.
Refer to Figure 13 for isolator selection, placement and loading information.
Isolators are identified by color and by the isolator part number.
Bolt the isolators to the mounting surface. Do not fully tighten the mounting
bolts. Mount the unit on the isolators and install a 1/2"nut on each isolator
positioning pin. Maximum isolator deflection should be approximately 1/4-
inch. Level the unit carefully. Refer to "Unit Leveling" . Now fully tighten
isolator mounting bolts.

Unit Leveling

Before snugging down the mounting bolts, level the unit carefully. Check unit
level end-to-end by placing a level on the top surface of the unit frame. Unit
should be level to within 1/4-inch (6.35 mm) over its length. Place the level on
the unit frame to check front-to-back level. Adjust to within 1/4" (35 mm) of
level front-to-back. Use the adjustable spring isolators or shims to level
the unit.

Water Piping

Thoroughly flush all water piping to the unit before making the final piping
connections to the unit.
CAUTION
Use Piping Strainers!
To prevent evaporator damage, pipe strainers must be installed in
the water supplies to protect components from water born
debris. Trane is not responsible for equipment-only-damage
caused by water born debris.
CAUTION
Proper Water Treatment!
The use of untreated or improperly treated water in a RTAA may
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water treatment
specialist be engaged to determine what water treatment, if any,
is required. Trane assumes no responsibility for equipment
failures which result from untreated or improperly treated water,
or saline or brackish water.
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