Carrier Comfort 50VL-F, Manual

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50VL-C, 50VL-F: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
Introduction
This packaged air conditioner is fully self-contained and designed for
outdoor installation (See Fig. 1 ). See Fig. 2 and Fig. 3 for unit
dimensions. All unit sizes have discharge openings for both horizontal
and downflow configurations, and are factory shipped with all downflow
duct openings covered. The unit may be installed either on a rooftop or
on a ground-level cement slab. (See Fig. 4 for roof curb dimensions.)
Receiving and Installation
Step 1 – Check Equipment
Identify Unit
The unit model number and serial number are printed on the unit
informative plate. Check this information against shipping papers.
Inspect Shipment
Inspect for shipping damage before removing packaging materials. If
unit appears to be damaged or is torn loose from its anchorage, have it
examined by transportation inspectors before removal. Forward claim
papers directly to transportation company. Manufacturer is not
responsible for any damage incurred in transit. Check all items against
shipping list. Immediately notify the nearest equipment distribution
office if any item is missing. To prevent loss or damage, leave all parts in
original packages until installation.
If the unit is to be mounted on a curb in a downflow application, review
Step 7 to determine which method is to be used to remove the downflow
panels before rigging and lifting into place. The panel removal process
may require the unit to be on the ground.
Step 2 – Provide Unit Support
IMPORTANT: The unit must be secured to the curb by installing
screws through the bottom of the curb flange and into the unit base rails.
When installing large base units onto the common curb, the screws must
be installed before allowing the full weight of the unit to rest on the curb.
A minimum of six screws are required for large base units. Failure to
secure unit properly could result in an unstable unit. See Warning near
Rigging/Lifting information and accessory curb instructions for more
details.
For hurricane tie downs, contact distributor for details and PE
(Professional Engineering) Certificate if required.
Roof Curb
Install accessory roof curb in accordance with instructions shipped with
curb (See Fig. 4 ). Install insulation, cant strips, roofing, and flashing.
Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is critical for a
water tight seal. Install gasketing material supplied with the roof curb.
Improperly applied gasketing also can result in air leaks and poor unit
performance.
Curb should be level to within 1/4 in. (6.35 mm) (See
Fig. 4 ). This is
necessary for unit drain to function properly. Refer to accessory roof
curb installation instructions for additional information as required.
Installation on older “G” series roof curbs.
Two accessory kits are available to aid in installing a new “G” series unit
on an old “G” roof curb.
1. Accessory kit number CPADCURB001A00, (small chassis) and
accessory kit number CPADCURB002A00, (large chassis) includes
roof curb adapter and gaskets for the perimeter seal and duct
openings. No additional modifications to the curb are required
when using this kit.
2. An alternative to the adapter curb is to modify the existing curb by
removing the outer horizontal flange and use accessory kit number
CPGSKTKIT001A00 which includes spacer blocks (for easy
alignment to existing curb) and gaskets for the perimeter seal and
duct openings. This kit is used when existing curb is modified by
removing outer horizontal flange.
Slab Mount
Place the unit on a solid, level pad that is at least 2 in. (51 mm) above
grade. The pad should extend approximately 2 in. (51 mm) beyond the
casing on all 4 sides of the unit (See Fig. 7 ). Do not secure the unit to the
pad except when required by local codes.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
When removing access panels (see Fig. 22 ) or performing maintenance
functions inside your unit, be aware of sharp sheet metal parts and
screws. Although special care is taken to reduce sharp edges to a
minimum, be extremely careful and wear appropriate clothing, safety
glasses and gloves when handling parts or reaching into the unit.
CAUTION
!
UNIT/STRUCTURAL DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Ensure there is sufficient clearance for saw blade when cutting the outer
horizontal flange of the roof curb so there is no damage to the roof or
flashing.