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A
B
Fig. 7 - - Unit Leveling Tolerances
Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition)
shall not exceed 0.5 in. wg (87 Pa) with economizer or
without economizer.
For vertical ducted applications, secure all ducts to roof
curb and building structure. Do not connect ductwork to
unit.
Insulate and weatherproof all external ductwork, joints,
and roof openings with counter flashing and mastic in
accordance with applicable codes.
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
"B"
MAX WEIGHT
UNIT
LB
580J*17D
2160
580J*20D
2175
580J*24D
2325
580J*28D
2455
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail "A." Holes in base rails are centered around the
unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.
C
MAXIMUM ALLOWABLE
DIFFERENCE IN. (MM)
A-B
B-C
A-C
0.25" (6)
0.5" (12)
0.5" (12)
C09132
"914-1371"
(36"-54")
SEE DETAIL A
"C"
"A"
KG
IN
980
127.8
987
127.8
1055
141.5
1114
141.5
Fig. 8 - - Rigging Details
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.
A minimum clearance is not required around ductwork.
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not
required if top crating is left on unit. Rollers may be used
to move unit across a roof. Level by using unit frame as a
reference. See Table 1 (on page 7) and Fig. 8 for
additional information.
Lifting holes are provided in base rails as shown in Fig. 8.
Refer to rigging instructions on unit.
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
Before setting the unit onto the curb, recheck gasketing on
curb.
PLACE ALL SEAL STRIP
IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
DIMENSIONS
A
B
MM
IN
3249
58.7
3249
58.7
3595
58.7
3595
58.7
11
CAUTION
DETAIL A
C
MM
IN
MM
1491
52.3
1328
1491
52.3
1328
1491
52.3
1328
1491
60.3
1532
C09107
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