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Matching CAS090*G/H Model to Evaporator
Coil
The Model CAS090*G/H is a single-circuit, two- - stage
unit design, requiring one set of refrigeration piping.
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 installa-
tion 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
The CAS090 units are designed and approved for outdoor
installation 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 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:
Local codes may require different clearances
than specified in Fig. 4. It is the responsibility of installers
to be knowledgeable in local codes and to modify the
recommended clearances to satisfy local codes.
NOTE:
Consider also the effect of adjacent units on
airflow performance and control box safety clearance.
REAR:
Min 18" (457 mm)
requried for service
LEFT:
Min 18" (457 mm)
requried for service
Note: Observe requirements for 39" (914 mm) operating clearance
on either Left or Rear coil opening.
Fig. 3 - - Service Clearance Dimensional Drawing
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
interconnecting refrigeration piping, including suction
riser requirements (outdoor unit above indoor unit), liquid
line lift (outdoor unit below indoor unit) and hot gas
6
RIGHT:
Min 18" (457 mm)
requried for service
FRONT:
42" (1067 mm)
requried for service
C110201
length for
Specifications are subject to change without notice.
bypass line. Relocate sections to minimize 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.
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:
S Consult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
S Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Fig. 2 for unit
dimensions and weight distribution data.
S Locate the unit so that the outdoor coil (condenser)
airflow is unrestricted on all sides and above.
S The unit may be mounted on a level pad directly on the
base channels or mounted on raised pads at support
points. See Tables 1 and 2 for unit operating weights.
See Fig. 2 for weight distribution based on
recommended support points.
NOTE: If vibration isolators are required for a particular
installation, use the data in Fig. 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 obstructing airflow.
Step 4 — Rig and Mount the Unit
CAUTION
!
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.
501 01 3600 01
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