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Pre-Installation Requirements
8 CAH-SVX01A-EN
General Storage
The unit controller and all other
electrical/electronic components
should be stored in conditions of
-20ºF to 120°F and 5 to 95 percent
relative humidity, non-condensing.
Electrical components are not
moisture-tolerant. Factory protective
coverings should be removed prior
to storage.
Long-Term Storage
For longer periods of storage, allow
proper clearance around the unit to
perform periodic inspection and
maintenance of the equipment.
While the unit is in storage:
• Every two weeks, rotate the fan
and motor shaft 30 revolutions
by hand.
• Every six months, check fan shaft
bearings and grease lines. Add
grease using a manual grease
gun following the lubrications
recommendations in “Fan
Bearing Lubrication” on page 51.
Outdoor Storage
Considerations
Outdoor storage is not
recommended; however, when
outdoor storage is necessary,
several things must be done to
prevent damage:
Note: Keep the equipment in the
original shipping container for
protection and ease of handling.
1 Select a well-drained area,
preferably a concrete pad or
blacktop surface.
2 Place the unit on a dry surface or
raised off the ground to assure
adequate air circulation beneath
the unit and to assure no portion
of the unit will contact standing
water at any time.
3 Loosen the belt tension on the
drive belts.
4 Cover the unit securely with a
canvas tarp.
5 Do not stack units.
6 Do not pile other material on the
unit.
Preparing the Unit
Site
1 Ensure the installation site can
support the total weight of the
unit. The building roof must be
able to support the entire weight
of the unit, roof curb and
accessories. Refer to the unit
submittals for weights.
2 Allow sufficient space to allow
adequate free air and necessary
service access. Refer to
submittals for specific
minimums.
3 Allow room for supply and
return piping, ductwork,
electrical connections, and coil
removal.
4 Ensure there is adequate height
for condensate drain
requirements. See “Drain Pan
Trapping” on page 29.
Note: Inadequate height may
necessitate core-drilling the floor to
attain proper trap height. Insufficient
height could inhibit condensate
drainage and result in flooding the
unit and/or equipment room.
ƽ WARNING
Level Foundation!
The floor or foundation must be
level and the condensate drain at
the proper height for proper coil
drainage and condensate flow.
Standing water and wet surfaces
inside air-handling units could result
in microbial growth, which may
cause unpleasant odors, serious
health problems, or death.
5 Confirm the foundation of the
mounting platform is level and
large enough to include the unit
dimensions (refer to the unit
submittals for specific
dimensions).
6 Provide adequate lighting for
maintenance personnel to
perform maintenance duties.
7 Provide permanent power
outlets in close proximity to the
unit for installation and
maintenance.
8 Depending upon job
requirements, the customer may
need to provide 120 Vac power to
the unit controller. Refer to
submittals for more information.
A dedicated 15-amp circuit is
recommended.
9 Wiring for Custom units must be
provided by the installer and
must comply with all national
and local electrical codes.
10 Rooftop curb mounted units
must be sealed tightly to the
curb. Use proper sealants and
roof to curb sealing techniques
to prevent water and air leakage.
Note: Preparation of the roof curb or
pier mount and roof openings
should be completed prior to lifting
the unit to the roof.