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INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.
Consult local building codes and the NEC (National Electri-
cal
Code) ANSI/NFPA 70
requirements.
2.
Determine unit location (from project plans) or select unit
location.
3.
Check for possible overhead obstructions which may
interfere 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. 5.
Select a unit mounting system that provides adequate height to
allow for removal and disposal of frost and ice that will form
during the heating-defrost mode.
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 be-
low indoor unit) and hot gas bypass line. Relocate sections to
minimize the length of interconnecting tubing.
IMPORTANT: DO NOT BURY REFRIGERATION LINES.
Although unit is weatherproof, avoid locations that permit wa-
ter from higher level runoff and overhangs to fall onto the unit.
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
Step 2 — Complete Pre-Installation Checks
CHECK UNIT ELECTRIC CHARACTERISTIC
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.
for
special
installation
RIGHT:
Min 18" (457 mm)
required for service
FRONT:
42" (1067 mm)
required for service
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, re-
frigerant piping, and servicing unit. See Fig. 1 and 2 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 Tables 2 and 3 for unit operating weights. See Fig. 1
and 2 for weight distribution based on recommended sup-
port points.
NOTE: If vibration isolators are required for a particular instal-
lation, use the data in Fig. 1 and 2 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 ob-
structing airflow.
Step 4 — Rig and Mount the Unit
RIGGING
These units are designed for overhead rigging. Refer to the rig-
ging 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, ply-
wood sheets may be placed against the sides of the unit, behind
cables. Run cables to a central suspension point so that the an-
gle 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
Refrigerant lines must be carefully designed and constructed to
ensure equipment reliability and efficiency. Line length, pres-
sure drop, compressor oil return, and vertical separation are
several of the design criteria that must be evaluated. See
Table 4.
IMPORTANT: Do not bury refrigerant piping underground.
IMPORTANT: A refrigerant receiver is not provided with
the unit. Do not install a receiver.
9
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