Trane SCXG-SVX01B-EN manual Skid Removal, External Unit Isolation, Pre-Installation Checklist

pre-installation

Installation considerations

Skid Removal

The unit ships on skids to provide forklift locations from the front or rear.The skid allows easy maneuverability of the unit during storage and transportation.

Remove the skids before placing the unit in its permanent location.

Remove the skids using a forklift or jack. Lift one end of the unit off of the skids. See Figure I-PC-5 and I-PC-6 for unit gravity block location. Slide the skids out and lower the unit at the installation location.

Note: External isolation is not necessary since units are internally isolated. Consult a vibration specialist before “double-

view of Figure I-PC-9, must be 1/4 - 1/2 inches.To increase the clearance, lift the unit off the isolator and turn the leveling bolt counterclockwise. Recheck the unit level and the housing clearances. Maximum allowable difference between isolator heights is 1/4 inch. Shim as required under the isolators.

Note: The compressors and fan assembly are internally isolated on most units. Due to this, the addition of external isolation devices (spring mounting isolators) is at the discretion of the building or HVAC system designer.

†Allow three fan diameters above the unit for the discharge ductwork. Return air enters the rear of the unit and conditioned supply air discharges through the top.

†Electrical connection knockouts are on the top, left side of the unit.

†Allow adequate space for piping access and panel removal. Condenser water piping, refrigerant piping, and condensate drain connections are on the lower left end panel.

Note: Unit height and connection locations will change if using vibration isolators. The unit height may increase up to 5 7/8” with spring type isolators.

isolating” the unit.

External Unit Isolation

If your job requires external vibration isolation, two options are available: isopads or spring-type isolators. Isopads should be placed under the unit at locations indicated on the factory- provided isolator sheet.

Set the spring-type isolators (Figure I-PC-

9)in position after the unit is removed from skids before making electrical, piping, or duct connections. All units require a minimum of four isolators per unit. But some may require six isolators, depending upon unit options.

Note: Trane strongly recommends you consult a vibration specialist before double-isolating the unit. Double isolation is not recommended.

If you decide to externally isolate the unit, use spring-flex, type CP isolators. The spring number is marked on the outer housing. See Figure I-PC-9.

To install external isolators, complete the following procedure.

Pre-Installation Checklist

Complete the following checklist before beginning unit installation.

†Verify the unit size and tagging with the unit nameplate.

†Make certain the floor or foundation is level, solid, and sufficient to support the unit and accessory weights. Level or repair the floor before positioning the unit if neccesary.

†Allow minimum recommended clearances for routine maintenance and service. Refer to unit submittals for dimensions.

†Electrical supply power must meet specific balance and voltage requirements as described in the “Electrical Requirements” section.

†Water-cooled units only: The installer is responsible for providing a condenser main, standby water pump, cooling tower, pressure gauges, strainers, and all components for waterside piping. See the “Water Piping” section for general waterside recommendations.

†Air-cooled units only: The installer is responsible for providing and installing the remote air-cooled condenser and refrigerant piping, including filter driers.

1.Locate the isolators under unit base at the locations indicated on the factory- provided isolator placement sheet. Lift one end of the unit at a time to position isolators to the floor, using anchor bolts.

2.Level the unit by adjusting isolator heights. Unit weight may cause the upper housing to rest on the lower housing of the spring isolators. The isolator clearance shown in the side

Figure I-PC-9. Optional spring isolator dimensional data.

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