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9
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
A09079
CABINET MODEL
RIGGING WEIGHT
lb kg
Small 577D------A24 426 193
Small 577D------A30 433 196
Large
577D------A36 522 237
577D------A42 544 247
577D------A48 558 253
577D------A60 609 276
NOTE: See dimensional drawing for corner weight distribution.
Fig. 7 -- Suggested Rigging
Rigging/Lifting of Unit (See Fig. 7)
UNIT FALLING HAZARD
Failure to follow this warning could result in personal
injury or death.
Large base units must be secured to common curb before
allowing full weight of unit to rest on curb. Install screws
through curb into unit base rails while rigging crane is still
supporting unit.
!
WARNING
Lifting holes are provided in base rails as shown in Fig. 5 and 6.
1. Leave top shipping skid on the unit for use as a spreader bar
to prevent the rigging straps from damaging the unit. If the
skid is not available, use a spreader bar of sufficient length
to protect the unit from damage.
2. Attach shackles, clevis pins, and straps to the base rails of
the unit. Be sure materials are rated to hold the weight of the
unit (See Fig. 7).
3. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted level
with the ground.
After the unit is placed on the roof curb or mounting pad, remove
the top skid.
Select a nd Install Ductwork
The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non--reside nce type air conditioning and ventilating systems,
NFPA 90A or residence type, NFPA 90B and/or local codes and
ordinances.
Select and size ductwork, supply--air registers, and return air grilles
according to ASHRAE (Am erican Society of Heating,
Refrigeration, and Air Conditioning Engineers) recommendations.
The unit has duct flanges on the supply-- and return--air openings
on the s ide of the unit.
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury or death.
For vertical supply and return units, tools or parts could
drop into ductwork, therefore, install a 90 degree turn in the
return ductwork between the unit and the conditioned space.
If a 90 degree elbow cannot be installed, then a grille of
sufficient strength and density should be installed to prevent
obj ects from falling into the conditioned space.
!
WARNING
When designing and installing duc twork, consider the f ollowing:
1. All units should have field--supplied filters or accessory
filter r ack installed i n t he return--air side of the unit.
Recommended s izes for filters are shown in Table 1.
577D-- -- A