BAC Controls
TABLE OF CONTENTS
D2 BAC CONTROLS
D6 OPTIONS
PRODUCT & APPLICATION HANDBOOK VOLUME V
D1
Continuously providing solutions to the industry, BAC provides a full range of
control panels, engineered to meet every application. BAC control packages have been
designed to work seamlessly on all BAC evaporative cooling products. From the single point
solution of the Combined Drive to the versatility and reliability of the Variable Frequency
Drive, BAC can simplify and meet your application needs.
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BAC Controls:
Custom Engineered
Designed for your specific application.
From safety switches to combined drives.
Δ
Δ
Δ
Industrial
Grade
Components
Δ
Easy
Installation
Δ
Single Source
Solution
Energy
Indoor/Outdoor
Standard
Applications
Compliant
PRODUCT & APPLICATION HANDBOOK VOLUME V
D3
BAC Controls Benefits
››Single Source Solution
`` BAC has designed the controls taking into consideration the exact
specifications of the fan and spray pump motors, heaters, and other
accessories, providing you with a single source solution.
››Indoor/Outdoor Application
`` BAC offers a variety of enclosures for location flexibility; whether in a
mechanical equipment room or outside next to the equipment.
››Industrial Grade Components
`` IEC contactors are provided with all BAC combined drive enclosures.
Combined Drive Enclosure
NEMA contactors are provided with all BAC standard enclosed
controls (25 amps and above). Circuit breaker protection is provided
for the main panel as well as separate circuit breakers for each
motor. Each control panel is UL/CSA or UL/CUL rated.
››Ease of Installation
`` Combined Drive Enclosures incorporate the VFD into the controls
enclosure, offering a standardized, compact single enclosure, prewired for a single-point field connection. Contact your local BAC
Representative for availability.
››Energy Standard Compliance
`` BAC Controls can help you comply with the speed control
requirements of current energy standards and codes such as
ASHRAE Standard 90.1 and California Title 24. These standards
require all fan motors 7.5 HP and above to have the ability to run at
2/3 or less of full speed. BAC offers many alternatives to comply with
this requirement, depending on your unique system needs. These
methods include Variable Frequency Drives, the BALTIGUARD™
and BALTIGUARD PLUS™ Fan Systems, or multi-speed motors. The
automatic motor speed control requirements of these standards can
be satisfied through the controllers and temperature/pressure sensors
available with BAC Controls for any of these methods.
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VFD with Pre-wired Terminal Box
NOTE: The fan motors, spray pump motors,
and other electrical accessories must be
powered separately.
BAC Controls Options
››BAC Equipment Control Packages
By using the Combined Drive Enclosure (CDE), the Enclosed Control
Package, or a VFD with an external Enclosed Control Package, BAC
offers a complete controls solution for every option available on BAC’s
products. Each control package is specially engineered to seamlessly
integrate controls into your new BAC equipment with any combination of
fans, spray pumps, basin heaters and other protective options.
››Combined Drive Enclosure (CDE)
Combined Drive Enclosure includes BALTILOGIC sequencing software
that is pre-programmed into the VFD to offer temperature based control
of auxiliary fan motors (BALTIGUARD PLUS™Fan System). Baltilogic
sequencing software also controls the spray pump starters, basin heaters,
vibration cutout switches, electronic water level control, and positive
closure dampers. The combined drive enclosure is UL508A/CUL rated.
Combined Drive Enclosure (NEMA 3R Shown)
`` BALTILOGIC SEQUENCING SOFTWARE
• Simplified user interface allows quick and easy access to
commonly adjusted parameters.
• Incorporates start-up wizard
`` COMBINED DRIVE ENCLOSURE COVER CONTROLS
• Easy to follow operator logic
• Complete auto control mode
• Hand mode for manual operation
`` BAC FACTORY START-UP
• Ensures successful configuration and operation of BAC VFDs.
• Extends standard two year (parts only) to three year warranty
(parts and labor).
`` STANDARD VFD
The standard VFD includes an enclosure, 24VDC power supply,
main circuit breaker, disconnect switch with lockable operator
handle, 3-contactor bypass, modular cooling fan and a detachable,
programmable VFD keypad. The standard VFD is UL508C/CSA rated.
Combined Drive Enclosure Front Panel (NEMA 3R Shown)
PRODUCT & APPLICATION HANDBOOK VOLUME V
D5
BAC Controls Options
`` 3-CONTACTOR BYPASS
The 3-Contactor Bypass is standard on all BAC drives (excluding
the ENDURADRIVE™ Fan System). The input contactor electrically
isolates the drive during bypass operation. The output and bypass
contactors are mechanically interlocked to regulate power to the fan
motor. The bypass allows for 100% fan speed operation back-up if
the drive is not functional for any reason.
`` ADDITIONAL COMBINED DRIVE FEATURES INCLUDE
• Main Disconnect Switch with Circuit Breaker
• 24VDC Power Supply
• Space Heater
• 120V Transformer
• Factory Pre-wired Terminal Strip
Combined Drive Enclosure Cover Controls
• Cover Controls
• Auxiliary Fan Motor Starter (Optional)
• Spray Pump Motor Starter(s) (Optional)
• Basin Heater Contactor(s) (Optional)
››Standard Enclosed Controls
BAC controls, designed with the highest grade components, are packed
with operation-friendly features to ensure a long life expectancy and
lower life cycle costs. The modular design of BAC panels allows
for consistency across projects and simplifies upgrades or future
replacements, yet can be customized to meet your particular application.
The enclosed controls are UL 508A listed and CUL certified and are
provided with a standard one year warranty (parts only).
`` STANDARD PANEL WITH AUXILIARY FAN MOTOR STARTER(S)
This panel includes an enclosure, control power transformer, main
circuit breaker, disconnect switch with lockable operator handle,
hand-off-auto switch, run pilot lights for each starter, and full
voltage, non-reversing starter with overload relay and double-break
silver alloy contacts. (If fan requires reverse operation, use a VFD in
lieu of a fan motor starter.)
`` CIRCUIT BREAKER PROTECTION
Circuit breaker protection allows for quick reset and is standard for
all BAC control panels. The main circuit breaker is sized for the
maximum current draw for the panel configuration. Each fan motor
starter includes individual branch circuit protection.
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Standard Enclosed Controls (NEMA 12 Shown)
`` ADDITIONAL ENCLOSED CONTROLS FEATURES INCLUDE:
• Main Disconnect Switch with Circuit Breaker
• 120V Transformer
• Switches, Pilot Lights & Buttons
• Auxiliary Fan Motor Starter (Optional)
• Temperature Controller/Operator Interface (Optional)
››Standard VFD
VFDs offer many benefits including:
`` Precise leaving fluid temperature control provides a more efficient
method to vary airflow compared to fan cycling, fan dampers, or
mechanical speed changers
`` Soft-starts, stops, and smooth accelerations prolong the mechanical
Standard VFD - (NEMA 3R Shown)
system (fans, motors, belts, bearings, etc.) life while reducing
maintenance
`` The soft-start feature minimizes start-up noise and smooth
acceleration making the equipment sound less noticeable to the
neighbors
`` Reduces wear on the motor
`` ADDITIONAL VFD FEATURES INCLUDE:
• Main Disconnect Switch with Circuit Breaker
• Ventilation Hood
• VFD Keypad/Keypad Connector
• 24VDC Power Supply
• Space Heater
››BALTIGUARD PLUS™ Fan System
The BALTIGUARD PLUS™ Fan System builds on the advantages of
the BALTIGUARD™ Fan System by adding a VFD to either the pony or
the main motor, depending on system requirements. This offers the
benefits of additional capacity control and energy savings, along with
the redundancy offered by the BALTIGUARD™ Fan System. Alternatively,
a VFD can be added to BOTH the pony and main motor, for complete
capacity control and redundancy under any load.
Standard Panel with Auxiliary Fan Motor Starter
PRODUCT & APPLICATION HANDBOOK VOLUME V
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BAC Controls Options
Externally Mounted Terminal Box
`` TERMINAL BOX (CURRENTLY AVAILABLE ON SERIES 3000, PT2, CXVB,
FXV, PCC, AND VCA MODELS)
All wiring for the fan motor(s) and vibration cutout switch leads are
pre-wired from the factory and terminated on the outside face of
the BAC unit in a clearly marked terminal box. This feature saves
installation labor required to run conduit and wiring to the motor and
vibration cutout switch, while saving material costs for the internal
conduit, wire, couplings and hardware. The externally mounted
terminal boxes are UL 1773 listed and CSA certified. The externally
mounted terminal boxes are provided with a standard 5-year
warranty. The terminal box includes a factory-mounted enclosure,
factory wiring to terminal blocks for the fan motors and vibration
cutout switches, and grounding lugs.
`` ADDITIONAL TERMINAL BOX FEATURES INCLUDE:
Series 3000 Terminal Box with Factory Wiring
• Pre-wired in factory for unit accessories
• Ships factory mounted to unit
• Eliminates field casing penetrations reducing possibility of leaks
and corrosion.
• For VCA and PCC models all options and accessories are pre-wired
››BAC Factory Temperature/Pressure
Sensor
`` Proper system control is crucial to operating your system at
peak efficiency under all combinations of atmospheric and load
conditions. Using a BAC provided sensor ensures reliable operation
and peak efficiency for the life of your unit.
`` BAC temperature and pressure sensors are factory tested and
approved for compatibility with all BAC control devices. High quality
sensors provide accurate signals offering precise system control.
Fan
Starter
Spray
Pump
Starters
Basin
Heater
VCOS
Interface
EWLC
BAC Factory Temperature Sensor
Common
Cards[1]
PCD
Baltilogic
Startup
CDE
Enclosed Control[2]
VFD[2]
Note 1: Communication Protocols limited to Modbus, Lonworks, Johnson N2, BACNet, and Siemens APOGEE.
Note 2: Enclosed Control and VFDs can be used together for complete controls solution.
Note 3: ENDURADRIVE™ Fan System VFD is supplied with motor only.
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Temperature/
Pressure
Controller
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