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
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag.
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
Fig. 5B—Slab Mounting Detail
C99096
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP. COIL
COND. COIL
2"
Fig. 6—Suggested Rigging
SIZE
MAXIMUM WEIGHT
A
B
lb.
kg
in.
mm.
in.
mm.
UNIT 50SD
024
372
169
20.0
508.0
19.3
490.2
030
395
179
20.0
508.0
14.0
355.6
036
462
210
21.0
533.4
20.5
520.7
042
489
222
21.0
533.4
20.5
520.7
048
509
231
21.0
533.4
20.0
508.0
060
521
236
21.0
533.4
20.0
508.0
C99066
DETAIL A
7