.INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installation requirements.
2.Determine unit location (from project plans) or select unit location.
3.Check for possible overhead obstructions which may in- terfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (pad, rails or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 4.
NOTE: Consider also the effect of adjacent units on airflow performance and control box safety clearance.
Do not install the outdoor unit in an area where fresh air supply to the outdoor coil may be restricted or when recirculation from the condenser fan discharge is possible. Do not locate the unit in a well or next to high walls.
Evaluate the path and required line length for interconnecting refrigeration piping, including suction riser requirements (out- door unit above indoor unit), liquid line lift (outdoor unit below indoor unit) and hot gas bypass line. Relocate sections to mini- mize the length of interconnecting tubing.
DO NOT BURY REFRIGERATION LINES.
Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.
| | RIGHT: |
| REAR: | Min 18” (457 mm) |
| requried for service |
| Min 18” (457 mm) |
| requried for service | |
| LEFT: | |
| Min 18” (457 mm) | FRONT: |
| requried for service |
| 42” (1067 mm) |
| |
Note: Observe requirements for 39” (914 mm) operating clearance on either Left or Rear coil opening.
Fig. 4 — Service Clearance Dimensional Drawing
Step 2 — Complete Pre-Installation Checks
CHECK UNIT ELECTRICAL CHARACTERISTIC — Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.
UNCRATE 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 compa- ny if the shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS
•Consult local building codes and National Electrical Code (NEC, U.S.A.) for special installation requirements.
•Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing unit. See Fig. 1 for unit dimensions and weight distribution data.
•Locate the unit so that the outdoor coil (condenser) air- flow 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 Tables 1A and 1B for unit operating weights. See Fig. 1 for weight distribution based on recommended support points.
NOTE: If vibration isolators are required for a particular installation, use the data in Fig. 1 to make the proper selection.
Step 3 — Prepare Unit Mounting Support Slab Mount —
Provide a level concrete slab that extends a minimum of 6 in. (150 mm) 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.
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RIGGING — These units are designed for overhead rigging. Refer to the rigging label for preferred rigging method. Spread- er bars are not required if top crating is left on the unit. All pan- els 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 — The 38AUZ unit is provided with a fusible joint in the suction line in accordance with applicable UL standards for pressure 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.
SIZE REFRIGERANT LINES — Consider the linear length of piping required between the outdoor unit and indoor unit (evaporator), the amount of liquid lift (indoor section installed above the outdoor section), and compressor oil return. Consider and identify also the arrangement of the tubing path (quantity and type of elbows in both lines), liquid line solenoid size, filter drier and any other refrigeration specialties located
