Step 3 - Locate Unit; Acoustical Considerations; Unit Placement And Rigging; Single-Piece Units (50Bvj) - Carrier Omnizone 50BV020-064 Installation, Start-Up, Service And Controls Operation And Troubleshooting

If any of the above items are missing or incorrect, contact your
local Carrier equipment sales office.
Before unit installation, read all manuals and become familiar
with the unit and its operation. Thoroughly check out the system
before operation. Complete the inspections and instructions listed
below to prepare a unit for installation. See Tables 2 and 3 on
page 8 for unit physical data and Tables 11 and 12 on pages 40
and 41 for unit electrical data. For unit service clearances refer to
Fig. 6 on page 9 and for typical unit dimensions refer to Fig. 7-23
on pages 10-26.
Step 3 — Locate Unit
Locate unit in an indoor area that allows easy removal of the
filters, access panels, and accessories. Make certain enough space
is available for service personnel to perform maintenance or re-
pairs. See Fig. 6 for service clearances.
Provide sufficient room to make all water, duct, and electrical con-
nections. If the unit is located in a small mechanical equipment
room, make sure adequate space is available for air to return freely
to the unit. These units are not approved for outdoor installations
and must be installed inside the structure. Do not locate in areas
that are subject to freezing.

ACOUSTICAL CONSIDERATIONS

Proper acoustical considerations are a critical part of every sys-
tem's design and operation. Each system design and installation
should be reviewed for its own unique requirements. For job spe-
cific requirements, contact an acoustical consultant for guidance
and recommendations. Consider the following recommendations:
1. Locate unit and supply/return ducts away from noise-
sensitive locations, including sleeping areas, private offices,
and other sound sensitive spaces.
2. Whenever possible, work with the architect to locate the
equipment rooms around the perimeters of restrooms, hall-
ways, fire escapes, stair wells, etc., to reduce noise transmis-
sion. This allows not only for isolation from radiated sound
but also enables the contractor to route duct systems around
sensitive locations.
3. Construct the equipment room of concrete block or use a dou-
ble offset stud wall with interwoven insulation. Seal all
penetrations.
4. Design the system for low total static pressure.
5. Use suitable vibration isolation pads or isolation springs
according to the design engineer's specifications.
6. A flexible canvas duct connector is recommended on both the
supply and return air sides of units to be connected to system
ductwork.
7. Use a minimum of 15 ft of return ductwork between the last
air terminal or diffuser and the unit.
8. Insulate supply and return ducts with 2 in., 3-lb density
insulation.
9. Round duct is recommended. If rectangular ductwork is used,
keep aspect ratios as small as possible (i.e., as close to square
as possible).
10. Avoid any direct line of sight from return air grilles into the
unit's return. If return air is to be ducted to an equipment
room, an elbow should be installed within the equipment
room.
11. Running a return air drop to near the floor of the room will
aid in sound attenuation.
12. Do not exceed the recommended supply duct velocity of
2,000 fpm.
13. Do not exceed the recommended return duct velocity of
1,000 fpm.
14. Use turning vanes on 90-degree elbows.
15. Place isolation springs under each corner of the unit and
under compressor sections.
16. Consider the use of compressor sound blankets where the
above steps cannot be taken.

UNIT PLACEMENT AND RIGGING

Ensure that the floor or equipment support structure is structurally
strong enough to support the weight of the equipment with
minimum deflection. A good, level floor is required for proper
unit operation and to ensure proper fit-up and alignment of all
bolt-together and union-coupled modules on modular units. Uti-
lize vibration isolation springs or pads between the unit and the
support structure or floor to reduce vibration and sound.
Use proper lifting and handling practices to avoid damage to the
unit. See Tables 2 and 3 for typical operating weights and
Fig. 7-23 for unit dimensions.
NOTE: Unit options may change unit operating weights and
dimensions.

SINGLE-PIECE UNITS (50BVJ)

Single-piece units are shipped as an entire assembly with factory
refrigerant charge. Single-piece units are not designed to be disas-
sembled for rigging. Use spreader bars and rigging straps if lifting
with a crane to avoid damage to the unit. Otherwise, move with a
fork truck using the shipping pallet.
NOTE: Do not rotate or tip any of the main unit sections prior to
or during installation.
For single-piece units with take apart construction engineered to
order (ETO) package, units will ship a nitrogen charge and split
refrigerant piping to allow the unit top and bottom sections to be
field separated. Refrigerant charge and field brazing of refrigerant
piping will be required. Do not rotate or tip units or unit sections
prior to or during installation.

MODULAR UNITS (50BVT,V,W)

Modular units are shipped in multiple sections (except the low boy
size 034) for easy movement and installation without the need for
breaking refrigerant lines. Move modular units with a fork truck
using the included base rails or use spreader bars and lifting straps
as shown in Fig. 1.
NOTE: Do not rotate or tip any of the main unit sections prior to
or during installation.

LOW BOY UNITS

50BV low boy units are short and wide, to allow installation in
height restricted areas. Low boy units ship as either one (unit size
034) or two (unit sizes 044-064) separate modules that are mated
together during the final installation. See Fig. 18, 19, 22, and 23
for low boy base unit dimensions. The filter rack/economizer sec-
tion of the low boy unit can be field removed for easier installa-
tion. See Fig. 4 and 5 for low boy field splits.

HIGH BOY UNITS

50BV high boy units are tall and thin and ship in two (size 034) or
four (sizes 044-064) modules that require field assembly of fan
and main sections). See Fig. 16, 17, 20, and 21 for high boy base
unit dimensions. The filter rack/economizer can be removed from
the main section to allow all high boy units to fit through a 36 in.
wide opening. NOTE: The fan assembly needs to be rotated. See
Fig. 2 and 3 for high boy field splits.
Refer to Fig. 7-23 for unit dimensions. Refer to Tables 2 and 3 for
physical data.

REMOVE PACKAGING

Remove all protective plastic and other supports only after the
units have been installed. Remove and discard unit top cover pro-
tector, filter cover, controller display protector, remove any includ-
ed shipping supports, and water piping connection packaging.
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