Carrier Omnizone 50BVC Installation, Start-Up, Service And Controls Operation And Troubleshooting page 4

MODEL
50BVC Water-Cooled
50BVQ Water-Cooled Heat Pump
50BVJ Water-Cooled
50BVT Water-Cooled
50BVV Water-Cooled Heat Pump
50BVW Water-Cooled
LEGEND
CV — Constant Volume
VAV — Variable Air Volume
Variable Air Volume (VAV) Units
The 50BVJ and W units come equipped with a Carrier I/O Flex
6126 controller with expander module and a supply fan VFD, in
addition to the UPM.
The I/O Flex controller is factory installed, wired and configured
to match the unit order configuration (stages of cooling and modu-
lating HGRH).
The I/O Flex controller provides staging of the unit compressors,
supply fan speed control, modulating hot gas reheat control (for
supply air temperature control, not dehumidification), and safety
operation (in conjunction with the UPM).
NOTE: The VAV units utilize face split coils and should not be op-
erated below 50% of nominal airflow to prevent coil freezing.
PRE-INSTALLATION
Omnizone™ 50BV units are intended for indoor installation only.
Review unit dimensions, piping and wiring connections, service
clearances, and other equipment details included in this installa-
tion guide, the product data, or the unit submittal prior to equip-
ment installation.
INSPECTION
Upon receipt of shipment, carefully check the shipment against
the bill of lading. Single piece units ship as a complete assembly.
Modular units ship as either one (30 ton low boy), two (30 ton
high boy, 40-60 ton low boy), or four (40-60 ton high boy) sepa-
rate pieces. Make sure all pieces have been received. Inspect the
carton or crating of each unit, and inspect each unit for damage on
both the interior and exterior. Ensure the shipping company makes
proper notation of any shortages or damage on all copies of the
freight bill. Concealed damage not discovered during unloading
must be reported to the shipping company within 5 days of re-
ceipt of shipment.
NOTE: It is the responsibility of the purchaser to file all necessary
claims with the shipping company.
UNIT STORAGE
The 50BV units are designed and packaged for indoor storage and
use only. If the equipment is not needed for immediate installation
upon its arrival at the job site, it should be left in its shipping car-
ton and stored in a clean, dry area. Units should not be stored in a
location that is subject to freezing. Units must only be stored or
moved in the normal upright position, as indicated by the up ar-
rows on each carton, at all times. DO NOT STACK UNITS.
INSTALLATION
Step 1 — Check Equipment
Upon receipt of equipment at the job site, inspect the carton or
crating of each unit, and inspect each unit for damage on both the
interior and exterior. Note any damage and contact your local
Carrier equipment sales office.
Table 1 — Model Number Reference By Application Type
TYPE* AVAILABLE CAPACITY
20 to 30 nominal tons
18 to 30 nominal tons
18 to 30 nominal tons
30 to 60 nominal tons
30 to 60 nominal tons
30 to 60 nominal tons
*All units are cooling only unless specified.
Prior to proceeding with installation or rigging, verify the follow-
ing:
1. Make sure the equipment received is the correct capacity,
configuration, and voltage, compared to the unit submittals or
product data.
2. Verify all modules/pieces have been received.
3. Verify all required accessories or other field installed compo-
nents (hose kits, controls, thermostats, shut off valves, control
interfaces etc.) have been received.
4. Verify that the equipment type matches the application type
(CV/SAV vs VAV).
If any of the above items are missing or incorrect, contact your lo-
cal 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 Table 2 for unit physi-
cal data, Table 12 for unit electrical data, Fig. 7-15 for typical unit
dimensions, and Fig. 6 for unit service clearances.
Step 2 — Check Jobsite
Prior to proceeding with removal of existing equipment and instal-
lation of new equipment, verify the following:
1. Verify the jobsite voltage matches the unit voltage.
2. Verify that the power feed and power system protection (if
existing) match the unit nameplate MCA and MOCP.
3. Verify installation path for equipment, check dimensions for
installation path. Check weights of any elevators or jobsite
rigging equipment.
4. Verify that the unit will fit in the installation location with the
proper service clearances.
5. For CV/SAV applications, verify that the proper thermostat or
control system exists for unit operation.
6. For VAV applications, verify that VAV air terminal units have
been installed or will be installed prior to starting up the
50BV unit. Also verify that a control interface (Virtual
BACview with USB link cable) will be available.
If any of the above items are missing or incorrect, contact your lo-
cal Carrier equipment sales office.
UNIT LOCATION
Locate unit in an indoor area that allows easy removal of the fil-
ters, access panels, and accessories. Make certain enough space is
available for service personnel to perform maintenance or repairs.
See Fig. 6 for service clearances. Provide sufficient room to make
all water, duct, and electrical connections. 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 ap-
proved for outdoor installations and must be installed inside the
structure. Do not locate in areas that are subject to freezing.
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CONSTRUCTION CONTROLS
Single-piece
Single-piece
Single-piece
Modular
Modular
Modular
CV
CV
VAV
CV
CV
VAV