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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 inter-
fere with unit lifting or rigging.
Step 1 — Plan for Unit Location
The 38AU units are designed and approved for outdoor installa-
tion only. Do not locate these units indoors. Do not add ducting to
unit fan system.
Select a location for the unit and its support system (pad, rails or
other) that provides for the minimum clearances required for safe-
ty. This includes the clearance to combustible surfaces, unit per-
formance and service access below, around and above unit as
specified in unit drawings. See Fig. 5.
NOTE: Local codes may require different clearances than speci-
fied in Fig. 5. It is the responsibility of installers to be knowledge-
able in local codes and to modify the recommended clearances to
satisfy local codes.
NOTE: Consider also the effect of adjacent units on airflow per-
formance 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.
REAR:
Min 18" (457 mm)
required for service
LEFT:
Min 18" (457 mm)
required for service
NOTE: Observe requirements for 39" (914 mm) operating clearance
on either Left or Rear coil opening.
Fig. 5 — Service Clearance Dimensional Drawing
Evaluate the path and required line length for interconnecting re-
frigeration piping, including suction riser requirements (outdoor
unit above indoor unit) and liquid line lift (outdoor unit below in-
door unit) Relocate sections to minimize the length of intercon-
necting tubing.
IMPORTANT: DO NOT BURY REFRIGERANT LINES.
Although unit is weatherproof, avoid locations that permit water
from higher level runoff and overhangs to fall onto the unit.
Step 2 — Complete Pre-Installation Checks
CHECK UNIT ELECTRICAL CHARACTERISTICS
Confirm before installation of unit that voltage, amperage and cir-
cuit protection requirements listed on unit data plate agree with
power supply provided.
RIGHT:
Min 18" (457 mm)
required for service
FRONT:
42" (1067 mm)
required for service
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 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. 3 and 4 for unit dimensions
and weight distribution data.
Locate the unit so that the outdoor coil (condenser) airflow is un-
restricted on all sides and above.
The unit may be mounted on a level pad directly on the base chan-
nels or mounted on raised pads at support points. See Fig. 3 and 4
for weight distribution based on recommended support points.
NOTE: If vibration isolators are required for a particular installa-
tion, use the weight distribution data in Fig. 3 and 4 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 obstruct-
ing 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 when packaging is removed.
If using top crate as spreader bar, once unit is set, carefully
lower wooden crate off building roof top to ground. Ensure
that no people or obstructions are below prior to lowering the
crate.
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 — Determine Refrigerant Line Sizes
Select the recommended line sizes for 38AUZ and 38AUD unit
from the appropriate tables.
7
CAUTION
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