Carrier 50PG03-07 Dokumentacja Pobierz pdf (Strona 4)

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.

UNIT

SIZE

03-07

MAX. WEIGHT

510

SEE

DETAIL A_

PLACE ALL SEAL STRIP

IN PLACE BEFORE PLACING

fUNIT ON ROOF CORg

Fig. 2 -- 50PG Rigging Label

Step 4 -- Field Fabricate Ductwork-- On vertical

units, secure all ducts to roof curb and building structure. Do

not connect ductwork to unit. For horizontal applications, field-

supplied flanges should be attached to horizontal discharge

openings and all ductwork secured to the flanges. Insulate and

weatherproof all external ductwork, joints, and roof openings

with counter flashing fend mastic in accordance with applicable

codes.

Ducts passing through an unconditioned space must be

insulated fend covered with a vapor bmriel:

If a plenum return is used with a vertical unit, the return

should be ducted through the roof deck to comply with applica-

ble fire codes.

A minimum clearance is not requiled around ductwork.

Cabinet return-air static pressure (a negative condition) shall

not exceed 0.35 in. wg with economizer or 0.45 in. wg without

economizer.

Step 5 -- Make Unit Duct Connections

VERTICAL SUPPLY/RETURN CONFIGURATION -- Unit

is shipped in vertical supply/return configuration. Ductwork

openings me shown in Fig. 1 and 3. Attach the ductwork to the

roof curb. Do not attach duct directly to the unit.

For vertical supply and return units, tools or parts could

&op into ductwork and cause fen injury. Install a 90-degree

turn in the leturn ductwork between the unit and the condi-

tioned space. If a 90-degree elbow cannot be installed, then

a grille of sufficient strength and density should be installed

to prevent objects from falling into the conditioned space.

HORIZONTAL SUPPLY/RETURN APPLICATIONS -- Unit

can be field-converted from vertical supply/return to horizontal

supply/return. Remove all screws securing horizontal duct

covers to duct panel. Save panels. Install duct covers in the

vertical duct openings in the basepan with the insulation side

up. Covel.s will drop into openings and can be secured using

field-supplied self-tapping screws. Ductwork can be attached

to duct flanges provided on unit. When securing ductwork to

unit, do not drill in area below bead or above top edge of duct

opening.

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