Carrier 38AUM Series Installation, Operation & Maintenance Manual page 9

Step 2 — Complete Pre-Installation Checks
Check Unit Electrical Characteristics: Confirm before installation of unit that voltage, amperage and circuit
protection requirements listed on unit data plate agree with power supply provided.
Un-crate Unit: Remove unit packaging except for the top skid assembly, which should be left in place until after the
unit is rigged into its final location.
Inspect Shipment: File a claim with shipping company if the shipment is damaged or incomplete.
Consider System Requirements:
• Consult local building codes or the U.S.A. National Electrical Code (Ref: ANSI/NFPA 70, [American National
Standards Institute/National Fire Protection Association], latest revision) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing unit. See Unit Dimensional
Drawing for unit dimensions and weight distribution data.
• Locate the unit so that the outdoor coil (condenser) airflow is unrestricted on all sides and above.
• The unit may be mounted on a level pad directly on the base channels or mounted on raised pads at support
points. See Unit Dimensional Drawing for unit operating weights and for weight distribution based on
recommended support points.
NOTE: If vibration isolators are required for a particular installation, use the data in Unit Dimensional Drawing to make
the proper selection.
Step 3 — Prepare Unit Mounting Support
Slab Mount — Provide a level concrete slab that extends a minimum of 150 mm (6 in.) beyond unit cabinet. Install a
gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.
Step 4 — Rig and Mount the Unit
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
All panels must be in place when rigging. Unit is not designed for
handling by fork truck.
Rigging: These units are designed for overhead rigging. Refer to the rigging label for preferred rigging method.
Spreader bars are not required if top crating is left on the unit. All panels must be in place when rigging. As further
protection for coil faces, plywood sheets may be placed against the sides of the unit, behind cables. Run cables to a
central suspension point so that the angle from the horizontal is not less than 45 degrees. Raise and set the unit down
carefully. If it is necessary to roll the unit into position, mount the unit on longitudinal rails, using a minimum of 3
rollers. Apply force to the rails, not the unit. If the unit is to be skidded into position, place it on a large pad and drag it
by the pad. Do not apply any force to the unit. Raise from above to lift the unit from the rails or pad when unit is in its
final position. After the unit is in position, remove all shipping materials and top crating.
Step 5 — Complete Refrigerant Piping Connections
IMPORTANT: Do not bury refrigerant piping underground.
IMPORTANT: A refrigerant receiver is not provided with the unit. Do not install a receiver.
Provide Safety Relief
If local codes dictate an additional safety relief device, purchase locally and install locally. Installation will require the
recovery of the factory shipping charge before the factory tubing can be cut and the supplemental relief device is
installed. Model 38AUMD has two separate refrigeration systems. If required, each circuit will require a field-
supplied/installed supplemental relief device.
CAUTION
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