IMPORTANT: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weathertight and airtight seal. When electric heat is
installed, use fire proof canvas (or similar heat resistant material)
connector between ductwork and unit discharge connection. If
flexible duct is used, insert a sheet metal sleeve inside duct. Heat
resistant duct connector (or sheet metal sleeve) must extend 24-in.
from the unit discharge connection flange into the ductwork.
CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DIS-
CHARGE
Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag or
electrical shock could result.
1. Open all electrical disconnects and install lockout tag before
starting any service work.
2. Remove return duct cover located on duct panel by breaking
four (4) connecting tabs with screwdriver and a hammer. (Fig.
8&9)
3. To remove supply duct cover, break front and right side
connecting tabs with a screwdriver and a hammer. Push louver
down to break rear and left side tabs. (Fig.8&9)
4. If unit ductwork is to be attached to vertical opening flanges
on the unit composite base (jackstand applications only), do so
at this time. Collect ALL screws that were removed. Do not
leave screws on rooftop as permanent damage to the roof may
occur.
5. It is recommended that the unit base insulation around the
perimeter of the vertical return-air opening be secured to the
unit base with aluminum tape. Applicable local codes may
require aluminum tape to prevent exposed fiberglass.
6. Cover both horizontal duct openings with the duct covers from
the accessory duct cover kit. Ensure opening is air-and
watertight.
7. After completing unit conversion, perform all safety checks
and power up unit.
NOTE: The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
nonresidence-type air conditioning and ventilating systems, NFPA
Fig. 6—Suggested Rigging
SIZE
MAXIMUM WEIGHT A B
lb. kg in. mm. in. mm.
UNIT 50GS
018 276 125.2 20 508.0 13 330.2
024 282 127.9 19 482.6 13 330.2
030 280 127.0 19 482.6 14 355.6
036 290 131.5 20 508.0 14 355.6
042 316 143.3 19 482.6 14 355.6
048 346 156.9 20 508 17 431.8
060 411 186.4 19 482.6 16 406.4
UNIT 50GX
024 292 132.5 18.5 469.9 14.50 368.3
030 313 142.5 19.5 495.3 15.50 393.7
036 321 145.6 19.5 495.3 15.25 387.4
042 343 155.6 20.5 520.7 16.75 425.5
048 348 157.9 19.5 495.3 17.62 447.6
060 421 191.0 20.5 520.7 16.25 412.8
C99066
PLACE RIGGING BRACKET ASSEMBLY IN 4
RIGGING HOLES AND INSTALL TIE DOWN STRAP
AROUND PERIMETER OF UNIT AND THROUGH
SPACE IN BRACKET ASSEMBLY
INSTALL SAFETY STRAPS TO
RIGGING CLEVIS AT 4 RIGGING BRACKETS
TIGHTEN STRAPPING SECURELY
WITH TENSION BUCKLE
SEE DETAIL A
DETAIL A
SCALE 0.250
914-137"
(36"-54")
“A”
“B”
7
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