Carrier PA4G, Installation Instructions Manual

Page: 6 / 30

PA4G: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
5.Insulated panels: 1-in. (25.4 mm) thick fiberglass 1 lb. density.
Fig. 4 – Roof Curb Dimensions
A09051
NOTE: See dimensional drawing for corner weighs.
Fig. 5 – Unit Suggested Rigging
Step 3 – Provide Clearances
The required minimum service clearances are shown in Fig. 2 and Fig. 3 .
Adequate ventilation and outdoor air must be provided. The outdoor fan
draws air through the outdoor coil and discharges it through the top fan
grille. Be sure that the fan discharge does not recirculate to the outdoor
coil. Do not locate the unit in either a corner or under an overhead
obstruction. The minimum clearance under a partial overhang (such as a
normal house overhang) is 48 in. (1219 mm) above the unit top. The
maximum horizontal extension of a partial overhang must not exceed 48
in. (1219 mm)
IMPORTANT: Do not restrict outdoor airflow. An air restriction at
either the outdoor-air inlet or the fan discharge may be detrimental to
compressor life.
Do not place the unit where water, ice, or snow from an overhang or roof
will damage or flood the unit. Do not install the unit on carpeting or
other combustible materials. Slab-mounted units should be at least 2 in.
(51 mm) above the highest expected water and runoff levels. Do not use
unit if it has been under water.
Step 4 – Field-Fabricate Ductwork
Secure all ducts to roof curb and building structure on vertical discharge
units. Do not connect ductwork to unit. For horizontal applications, unit
is provided with flanges on the horizontal openings. All ductwork should
be secured to the flanges. Insulate and weatherproof all external
ductwork, joints, and roof openings with counter flashing and mastic in
accordance with applicable codes.
Ducts passing through an unconditioned space must be insulated and
covered with a vapor barrier. If a plenum return is used on a vertical unit,
the return should be ducted through the roof deck to comply with
applicable fire codes. See unit rating plate for any required clearances
around ductwork. Cabinet return-air static shall not exceed -.25 IN. W.C.
Step 5 – Rig and Place Unit
Rigging and handling of this equipment can be hazardous for many
reasons due to the installation location (roofs, elevated structures, etc.).
Only trained, qualified crane operators and ground support staff should
handle and install this equipment.
When working with this equipment, observe precautions in the literature,
on tags, stickers, and labels attached to the equipment, and any other
safety precautions that might apply.
Training for operators of the lifting equipment should include, but not be
limited to, the following:
SMALL CABINET LARGE CABINET
Unit
24 30
Unit
36 42 48 60
lb kg lb kg lb kg lb kg lb kg lb kg
Rigging
Weight
307 139 316 143
Rigging
Weight
354 161 388 176 437 198 481 218
ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.
PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.
50CY502286 2.0
CAUTION - NOTICE TO RIGGERS
PRUDENCE - AVIS AUX MANIPULATEUR
Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition
SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB
DUCTS
DETAIL A
VOIR DÉTAIL A
MINIMUM HEIGHT: 36" (914.4 mm)
HAUTEUR MINIMUM
UNIT HEIGHT
HAUTEUR D'UNITÉ
SEE DETAIL A
VOIR DÉTAIL A
BANDE SCELLANT DOIT ÊTRE
EN PLACE AVANT DE PLACER
L'UNITÉ SUR LA BASE DE TOIT
WARNING
!
PERSONAL INJURY OR PROPERTY DAMAGE
HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
When installing the unit on a rooftop, be sure the roof will support the
additional weight.