Bryant 581J Field Fabricate Ductwork, Rig and Place Unit, MAX Weight Dimensions Unit

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B	B-C	A-C
0.5” (13)	1.0” (25)	1.0” (25)

A minimum clearance is not required around ductwork.

!CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage to roofing materials.

Membrane roofs can be cut by sharp sheet metal edges. Be careful when placing any sheet metal parts

Fig. 6 - Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

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on such roof.

Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without economizer.

For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit.

Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimensions for the first 18 in. (458 mm) of duct length from the unit basepan.

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.

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.

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 and Fig. 7 for additional information.

Lifting holes are provided in base rails as shown in Fig. 7. Refer to rigging instructions on unit.

!CAUTION

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.

581J

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	MAX WEIGHT				DIMENSIONS
UNIT				A		B		C
	LB	KG	IN	MM	IN	MM	IN	MM
581J*07	1200	545	88.0	2235	44.0	1120	41.5	1055
581J*08	1420	645	88.0	2235	44.0	1120	49.5	1255
581J*09	1420	645	88.0	2235	44.0	1120	49.5	1255
581J*12	1665	757	88.0	2235	32.0	815	49.5	1255

NOTES:

1.SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

2.Dimensions in ( ) are in millimeters.

3.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.

Fig. 7 - Rigging Details

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