Bryant 580F Alternate Unit Support, II. RIG and Place Unit, Positioning, Roof Mount

		FULLY INSULATED
		SUPPLY PLENUM
3 1/2"	2" X 1/4	1" INSULATION
	SUPPORT TYP.	1 1/2 # DENSITY,
	STITCH WELDED	STICK PINNED & GLUED

14 3/4"

6"

23"

NOTE: CRRFCURB013A00 is a fully factory preassembled horizontal adapter and includes an insulated transition duct. The pressure drop through the adapter curb is negligible.

For horizontal return applications: The power exhaust and barometric relief dampers must be installed in the return air duct.

12" WIDE STANDING SEAM PANELS

ACCESSORY	CURB	DESCRIPTION
PACKAGE NO.	HEIGHT
CRRFCURB013A00	1′-11″	Pre-Assembled, Roof Curb,
	(584)	Horizontal Adapter

Fig. 2 — Horizontal Supply/Return Adapter Installation (580F180-240)

IMPORTANT: The gasketing of the unit to the roof curb or adapter roof curb is critical for a watertight seal. Install gasket with the roof curb or adapter as shown in Fig. 1A and 1B. Improperly applied gasket can also result in air leaks and poor unit performance.

B. Alternate Unit Support

When the curb or adapter cannot be used, install unit on a noncombustible surface. Support unit with sleepers, using unit curb support area. If sleepers cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

II. STEP 2 — RIG AND PLACE UNIT

Inspect unit for transportation damage. File any claim with transportation agency.

Do not drop unit; keep upright. Use spreader bars over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof. Level by using unit frame as a refer- ence; leveling tolerance is ± 1/16 in. per linear ft in any direc- tion. See Fig. 3 for additional information. Unit operating weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails as shown in Fig. 3. Refer to rigging instructions on unit.

NOTE: On 580F300 units, the lower forklift braces must be removed prior to setting unit on roof curb.

A. Positioning

Maintain clearance, per Fig. 4-6, around and above unit to provide minimum distance from combustible materials, proper airflow, and service access.

Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air. For proper unit operation, adequate combustion and ventila- tion air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Locate mechanical draft system flue assembly at least 4 ft from any opening through which combustion products could enter the building, and at least 4 ft from any adjacent build- ing. When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.

B. Roof Mount

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Instructions continued on page 11.

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