User`s manual

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5
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II. UNIT DUCT CONNECTIONS
On vertical units, secure all ducts to roof curb and building
structure. Do not connect ductwork to unit. On horizontal
units, duct flanges should be attached to horizontal openings
and all ductwork should be secured to flanges.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with appli-
cable fire codes.
A minimum clearance is not required around ductwork. Cab-
inet return-air static shall not exceed –0.35 in. wg with
Durablade and EconoMi$er economizer or –0.45 in. wg with-
out economizer.
NOTE: Connection must be made to roof curb before unit is
set in place.
III. RIG AND PLACE UNIT
Inspect unit for transportation damage. File any claim with
transportation agency. 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 and Fig. 6 for
additional information. Operating weight is shown in Fig. 6.
Lifting holes are provided in base rails as shown in Fig. 6.
Refer to rigging instructions on unit.
IMPORTANT: Unit has forklift protection skids (wood run-
ners located behind forklift slots), be sure to remove forklift
protection skids from under unit before setting unit in place.
A properly positioned unit will have the following clearances
between unit and roof curb:
1
/
4
-in. clearance between roof
curb and base rails on each side, 3
5
/
16
-in. at duct end of unit;
1
/
4
-in. clearance between roof curb and condenser section
end. See Fig. 4, Views A-A and C-C.
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
Fig. 5 — Unit Leveling Tolerances
A-B B-C A-C
0.5 1.0 1.0
NOTES:
1. Dimension in ( ) is 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 skid when rigging to prevent rigging
straps from damaging unit.
3. Weights do not include economizer. See Table 1 for economizer weights.
Fig. 6 — Rigging Details
UNIT
580D
OPERATING
WEIGHT
‘‘A’’ ‘‘B’’ ‘‘C’’
Lb Kg in. mm in. mm in. mm
090
870 395
87.38 2219 40.25 1022
41.31 1050
102
880 399 41.31 1050
120
1035 469 49.31 1253
150
1050 476 49.31 1253
CAUTION:
All panels must be in place when rigging.