Bryant 574D Instruction Manual download pdf (Page 6)

OPTIONAL

RETURN

AIR

OPENING

OPTIONAL

SUPPLY

AIR

OPENING

EVAP. COIL COND. COIL

2˝

(50.8mm)

A07926

Fig. 5 -- Slab Mounting Details

Step 3 — Field Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical

discharge units. Do not connect ductwork to unit. For horizontal

applications, unit is provided with flanges on the horizontal

openings. All ductwork should be secured to the flanges. Insulate

and weatherproof all external ductwork, joints, and roof openings

with counter flashing and mastic in accordance with applicable

codes.

Ducts passing through an unconditioned space 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.

Read unit rating plate for any required clearances around ductwork.

Cabinet return--air static shall not exceed --.25 IN. W.C.

Step 4 — Provide Clearances

The required minimum operating and service clearances are shown

in Fig. 3 and 4. Adequate combustion, ventilation and condenser

air must be provided.

IMPORTANT: Do not restrict outdoor airflow. An air restriction

at either the outdoor--air inlet or the fan discharge may be

detrimental to compressor life.

The condenser fan pulls air through the condenser coil and

discharges it through the top grille. Be sure that the fan discharge

does not recirculate to the condenser coil. Do not locate the unit in

either a corner or under an overhead obstruction. The minimum

clearance under a partial overhang (such as a normal house

overhang) is 48--in. (1219 mm) above the unit top. The maximum

horizontal extension of a partial overhang must not exceed 48--in.

(1219 mm).

Do not place the unit where water, ice, or snow from an overhang

or roof will damage or flood the unit. Do not install the unit on

carpeting or other combustible materials. Slab--mounted units

should be at least 4 in. (102 mm) above the highest expected water

and runoff levels. Do not use unit if it has been under water.

Step 5 — Rig and Place Unit

Rigging and handling of this equipment can be hazardous for

many reasons due to the installation location (roofs, elevated

structures, etc.).

Only trained, qualified crane operators and ground support staff

should handle and install this equipment.

When working with this equipment, observe precautions in the

literature, on tags, stickers, and labels attached to the equipment,

and any other safety precautions that might apply.

Training for operators of the lifting equipment should include, but

not be limited to, the following:

1. Application of the lifter to the load, and adjustment of the

lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

3. Condition of the load as it relates to operation of the lifting

kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work

gloves.

Inspection

Prior to initial use, and at monthly intervals, all rigging shackles,

clevis pins, and straps should be visually inspected for any

damage, evidence of wear, structural deformation, or cracks.

Particular attention should be paid to excessive wear at hoist

hooking points and load support areas. Materials showing any kind

of wear in these areas must not be used and should be discarded.

UNIT FALLING HAZARD

Failure to follow this warning could result in personal

injury or death.

Never stand beneath rigged units or lift over people.

WARNING

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

When straps are taut, the clevis should be a minimum of 36

in. (914 mm) above the unit top cover.

WARNING

Rigging/Lifting of Unit (See Fig. 6)

UNIT FALLING HAZARD

Failure to follow this warning could result in personal

injury or death.

Large base units must be secured to common curb before

allowing full weight of unit to rest on curb. Install screws

through curb into unit base rails while rigging crane is still

supporting unit.

WARNING

Lifting holes are provided in base rails as shown in Fig. 3 and 4.

1. Leave top shipping skid on the unit for use as a spreader bar

to prevent the rigging straps from damaging the unit. If the

skid is not available, use a spreader bar of sufficient length

to protect the unit from damage.

2. Attach shackles, clevis pins, and straps to the base rails of

the unit. Be sure materials are rated to hold the weight of the

unit (See Fig. 6).

3. Attach a clevis of sufficient strength in the middle of the

straps. Adjust the clevis location to ensure unit is lifted level

with the ground.

After the unit is placed on the roof curb or mounting pad, remove

the top skid.

574D-- -- A

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Bryant 574D Instruction Manual Page 6

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