PARTS & MAINTENANCE GUIDE

MAINTENAN

PARTS &

MAINTENANCE

GUIDE

ENERGY SAVINGS RETROFITS

REDUCTION IN WATER USAGE

DECREASED WATER LEAVING TEMPERATURES

INCREASED PERFORMANCE

SOUND REDUCTION OPTIONS

COMPLETE PART DESCRIPTIONS

LARGE PRODUCT PHOTOS

MAINTENANCE TIPS

TECH TIPS

CAUTION TIPS

PRODUCT RETROFIT OPPORTUNITIES

MAINTENANCE REFERENCE MATERIALS

PICTURE INDEX OF PARTS

Welcome to the BAC Parts & Maintenance Guide. We are pleased to provide you with

a combination of parts, maintenance reference materials, and technical information

for use on all your evaporative cooling products. We are committed to keeping all of

your equipment running at peak performance through the life of the unit by providing

you with energy efﬁcient solutions and the most reliable parts in the industry.

this guide contains:

FANS & DRIVES / PAGES 2–11

WATER DISTRIBUTION / PAGES 12–17

CONTROLS / PAGES 18–20

RETROFITS / PAGES 21–35

SPOTLIGHTS / 11, 22, 26

ENDURADRIVE™ Fan System Retroﬁt Kit 11

Energy Saving Retroﬁts 22

VersaCross

Replacement Fill 26

REFERENCE / 36–52

Maintenance Checklist 36

Recommended Spare Parts 37

Troubleshooting Vibration Cutoff Switches 38–39

Fan Shaft Bearing Maintenance 40

Belt Tensioning and Sheave Alignment 41

Aluminum Fan and Bushing Installation 42

Aluminum and Cast Iron Sheave and Bushing

Installation Instructions 43

Fan Assembly Exploded View Drawings 44–46

Motor Orientation 47

Pump Selection 48-49

Water Quality Guidelines 50-51

Gear Drive Shaft Alignment Instructions 52

PICTURE INDEX (PIC DEX) / 53

CAUTION

LOOK FOR THESE

TIPS THROUGH

OUT THE GUIDE:

MAINTENANCE

PARTS & MAINTENANCE GUIDE

F IND YOUR R EPRESENTATIVE: Visit BaltimoreA ircoil.com/repfinder or Call:

800.896.8497

TECH

BAC OFFERS A FULL RANGE OF BAC PARTS FOR ALL EVAPORATIVE COOLING

MANUFACTURERS EQUIPMENT. LOOK FOR THIS SYMBOL THROUGHOUT THE GUIDE.

PARTS & MAINTENANC E G UIDE 1

BAC MAINTENANCE TIP:

When installing centrifugal fan wheels on hollow shafts, remember to apply the adhesive under the fan tabs to prevent the fan wheel from

slipping on the shaft.

Axial Fans

› Standard fan is high-efficiency and low sound

› Rugged, aluminum construction for corrosion resistance and

extended life

› For further reduced sound levels, Low Sound Fans, Whisper

Quiet Fans, and sound attenuation are available

› Factory balanced for easy installation and vibration-free

operation

› Maintain thermal performance as originally certified by CTI

› Most fan kits include bushing and special length bolts

AVAILABILITY: Available in sizes from 24” to 156” diameter,

4 blades to 12 blades for economical and quiet operation.

Centrifugal Fans

› Centrifugal fans have inherently low sound characteristics

› Available in multiple materials of construction to meet

various operating conditions

› Engineered and rated by BAC for optimum performance

› Maintain thermal performance as originally certified by CTI

› Complete installation kit includes hardware, adhesive, and

clamps

AVAILABILITY: Available in 15”, 18”, 22”, and 30” diameters

for shafts 1-3/16” to 5” in diameter. Fits BAC and other

manufacturers’ products.

2 BALTIM ORE A IRC OIL COMPANY

FANS & DRIVES

BAC CAUTION TIP:

Hub clamp bolts should be tightened gradually to a torque of 30 ft/lbs. Tighten bolts evenly around the clamp so that gaps are equal.

Shafts

› Specially selected tubing materials ensure strength and

durability

› BAC shafts are precision manufactured for vibration-free

operation

› Epoxy-coated for corrosion resistance

› Journals are ground and polished for an accurate fit and

easy bearing and drive component installation

› Long keyways for multiple drive combinations

› Grooved flats for positive, secure set-screw installation

AVAILABILITY: Sizes from 1” to 2-15/16” diameter and 18” to

148” long. Many available with nickel plating or in stainless

steel for added corrosion resistance.

Whisper Quiet Fans

› Ultimate low sound solution

› Available for Series 3000, 1500, PT2, FXV, and CXVB units

› Reduces sound levels generated from the unit with

minimal impact on thermal performance

PARTS & MAINTENANC E G UIDE 3

FANS & DRIVES

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

FANS & DRIVES

Automatic Bearing Greaser

› Compatible with all BAC bearings and other non BAC bearings

› Lithium batteries are standard

› Positive displacement pump allows installations up to 20 feet away from bearings when

using single and multiple greaser kits

› Variable output and user-settable based on number of bearings, size and type of service

› Significant labor savings through less maintenance

› Multi-Point Automatic Bearing Greasers are now available in 250cc and 500cc

› Replacement grease packs and batteries are available from stock

4 BALTIM ORE A IRC OIL COMPANY

Don’t forget

to order

bearing greaser

refill packs!

Multi-Point Automatic Bearing Greaser

Forced Draft – Multiple Bearings per Greaser

Bearing

Quantity Size of Bearings Multi-Point Greaser Setting

1-11/16”

or smaller

250cc Multi-point kit 1 Year

1-11/16”

or smaller

500cc Multi-point kit 6 Month

Larger than

1-11/16”

250cc Multi-point kit

500cc Multi-point kit

6 Month

1 Year

Induced Draft – Multiple Bearings per Greaser

1-11/16”

or smaller

250cc Multi-point kit 1 Year

1-11/16”

or smaller

500cc Multi-point kit 6 Month

Larger than

1-11/16”

Smaller than 2-15/16”

250cc Multi-point kit

500cc Multi-point kit

6 Month

1 Year

Larger than

1-11/16”

Smaller than 2-15/16”

250cc Multi-point

500cc Multi-point

3 Month

6 Month

2 2-15/16” 500cc Multi-point 3 Month

Single Automatic Bearing Greaser

Forced Draft – One Greaser per Bearing

Bearing

Quantity

Size of

Bearings

Bearing

Greaser Setting

1-11/16”

or smaller

125cc 1 Year

Larger than

1-11/16”

125cc

250cc

6 Month

1 Year

Induced Draft – One Greaser per Bearing

1-11/16”

or smaller

125 cc 1 Year

Larger than

1-11/16”

Smaller than

2-15/16”

125cc

250cc

6 month

1 Year

1 2-15/16” 250cc 3 Month

FANS & DRIVES

PARTS & MAINTENANC E G UIDE 5

Induced Draft Bearings

› Rated with a minimum L

of 80,000 or more operating hours

› Industrial grade pillow block castings for extended life

› Exclusive BAC slinger/locking collar keeps water off the

bearing seals

› Double-lip seal to keep moisture from contaminating the

grease

› Complete installation kit includes all hardware, shims, and

instructions

AVAILABILITY: Sizes from 1 7/16” to 2 15/16” for all vertical shaft cooling

tower applications.

Forced Draft Bearings

› Rated for an average life of 200,000 operating hours

› Pre-packed with water resistant grease for

easy maintenance

› Split sleeve design bearings are available for easy

replacement

AVAILABILITY: Sizes from 1” to 2 3/16” in flange mount, sleeve, split sleeve,

and pillow block ball bearing configurations.

BAC MAINTENANCE TIP:

If replacing only the top fan shaft bearing on vertical shafts, the locking collar on the bottom fan shaft bearing must be loosened and

then retightened after the installation of the new top bearing. This is critical because, by design, the top bearing is intended

to handle the thrust load.

6 BALTIM ORE A IRC OIL COMPANY

FANS & DRIVES

Cast Iron Bushings and Sheaves

› Minimum 2.0 service factor

› Fine-grain, high-strength cast iron

› Factory balanced for smooth operation

› Bushing design minimizes fretting corrosion on the shaft,

which greatly eases removal when required

AVAILABILITY: Bushing styles for all standard drive components from 1” to 2

15/16” diameter. Cast iron sheaves for all drive combinations, 1 to 8 grooves.

Aluminum Sheaves

› Designed for use with all induced draft cooling towers

› Corrosion resistant aluminum alloy for operation in the moist

cooling tower environment

› Less corrosion means less wear on sheave grooves and

extended belt life

› Available for both driver and driven shafts

AVAILABILITY: From 2 groove to 8 groove, 3 3/5” to 50” diameter for all

induced draft applications.

BAC MAINTENANCE TIP:

See bushing torque requirements for Cast Iron and Aluminum Sheaves in the reference section on page 43.

Always replace

bushings and

bearings

together to

reduce downtime!

PARTS & MAINTENANC E G UIDE 7

FANS & DRIVES

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

Belts and Powerbands

› Engineered for evaporative cooling operations

› Rated for 150% of unit horsepower

› Neoprene, backed with reinforced polyester, specifically

designed for extended life

AVAILABILITY: Up to 8 grooves and 195” long in A groove,

B groove, and cogged configurations.

ENDURADRIVE™ Fan System

Retrofit Kit

› Complete kit with matching motor, VFD, fan, bushing and

upgraded 2 beam mechanical support

› 90% reduction in maintenance costs

› Up to 10% energy reduction vs standard gear drive system

› 100% reliability with the elimination of a power transmission

system

› Industry best 7 year motor warranty and 5 year limited VFD

warranty

AVAILABILITY: Horsepower ratings from 20 to 125 horsepower with mounting

and shaft dimensions to fit the Series 3000 Cooling Tower.

8 BALTIM ORE A IRC OIL COMPANY

FANS & DRIVES

BAC Gear Systems

› Meet AGMA and CTI standards to ensure reliability

› Constructed of high-strength cast iron for

low sound, vibration-free operation

› Gear drives are available for both BAC and other

manufacturers’ equipment (exact dimensional fit, no

modification required)

AVAILABILITY: Horsepower ratings from 7.5 to 100 horsepower with mounting

and shaft dimensions to fit virtually any make of cooling tower.

Gear Couplings

› No need for maintenance or lubrication

› Installation is quick and easy, and no special tools are needed

› Couplings absorb all types of misalignment caused by shock

or vibration

› Not affected by dirt or moisture

Composite Drive Shafts

› Composite shaft ships with 316 SST gear and motor

couplings and hardware

› Made from high-strength composite material that allows for

higher misalignment tolerance

› Corrosion resistant

› Lightweight, which reduces vibration and extends the life of

the shaft

BAC TECH TIP:

Prior to installing the couplings, it is important to clean the shaft of any lubricants or protective coatings, as well as remove any existing

burrs that may damage the coupling.

PARTS & MAINTENANC E G UIDE 9

FANS & DRIVES

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

Premium Efficient Motors

› Motors are engineered specifically for the rigors of cooling tower applications

› Made of high-grade FC-200 cast iron for maximum cooling and includes additional grounding plug

› Permanently sealed bearings never require lubrication and eliminate water contamination to the

bearing grease

› BAC Premium Efficiency Cooling Tower Duty Motors are covered by a 7 year warranty when the motor

space heater is wired according to the motor wiring diagram.

› IP55 rating for greater protection from water and particulate contaminants

Bearings – Permanently sealed

and lubricated bearings provide

maintenance free long life.

Umbrella Seal – Fits over V-ring slinger

to provide protection from water and other

contaminants.

Conduit Box – Fully

gasketed, cast iron conduit

box includes drain plugs, lead

separator gasket, and internal

epoxy coating.

Internal Epoxy Coating –

Entire interior of the motor is

coated with epoxy for maximum

moisture/corrosion resistance.

Drain Plugs – Located every 90 degrees and on

the face of each endshield. They are easy to open

and accommodate all mounting conﬁgurations.

THE ENDURADRIVE

FAN SYSTEM RETROFIT KIT

Includes Factory Authorized Start Up

10 BALTIM ORE A IRC OIL COMPANY

FANS & DRIVES

Baltimore Aircoil Company’s ENDURADRIVE

™

Fan System is the most

durable engineered solution for your Series 3000 Cooling Tower!

BAC’s new ENDURADRIVE™ Fan

System retroﬁt kit gives you:

100% reliability on transmission components

versus a traditional gear drive system

90% reduction in maintenance costs

All while providing you the opportunity to increase

your energy savings by 10%

Please contact your local Representative for more

information at

www.BaltimoreAircoil.com/repﬁnder

or by calling 410.799.6200.

This system is available for retroﬁt on Series 3000

units manufactured between 1991 through today!

includes

KIT

THE ENDURADRIVE

FAN SYSTEM RETROFIT KIT

Includes Factory Authorized Start Up

MOTOR AND

MATCHING VFD

FAN AND BUSHING

NEW 2-BEAM

ENDURADRIVE ME SUPPORT

WITH MOTOR BASE

SPOTLIGHT

PARTS & MAINTENANC E G UIDE 11

Spray Branches

› Constructed of corrosion resistant PVC

› Grommeted construction allows spray branches and nozzles

to be easily removed

Water Distribution Nozzles

› BAC 360™ Spray Nozzle, A, AA, and Pyramid Nozzles are

grommeted for easy inspection and removal

› XF nozzles are gravity flow and can easily be inspected and

replaced while unit is in operation

› Kits are available to install 360™ Spray Nozzles in other

manufacturers coil products

› Patented design for pressurized or gravity-feed systems

guarantees optimum thermal performance

› Large orifice means non-clogging performance for effective

wetting of the heat-transfer surface

› Multiple sizes are available to accommodate

all system flow rates

AVAILABILITY: 1/4” through 1 1/8” orifice for properly

metered flow.

A or AA Counterﬂow Nozzle

used on open cooling towers

BAC 360™ Spray Nozzle

used on closed circuit

cooling towers and

evaporative condensers

XF Crossﬂow Nozzle used

on open cooling towers

BAC MAINTENANCE TIP:

Always check spray nozzles when inspecting evaporative cooling equipment as poor spray patterns will negatively effect unit performance.

BAC’s Pyramid nozzles

are used in IPC, IMT, and

other manufacturers’ ﬁeld

erected units

12 BALTIM ORE A IRC OIL COMPANY

WATER DISTRIBUTION

Spray Pumps

› Cast iron, bronze-fitted construction with mechanical seal

means pumps are industrial quality for a long, trouble-free

life

› Impeller and trims have been selected for difficult high-flow,

low-head requirements, assuring complete coil wetting to

reduce scale and provide maximum thermal capacity

› Supplied with vented seal housing to prevent air binding and

to provide a sump bleed connection

› Mechanical seal is constructed with a carbon rotating

element and a ceramic stationary element with stainless

steel hardware for a long, leak-free life

AVAILABILITY: High efficiency, high flow/low head pumps 1/3 through 10

horsepower and 1 1/2” through 4” discharge.

Pump Seal Kits

› Replacement TEFC pump motors are designed for outdoor

application

› Complete seal kits available from stock

› Shaft sleeves are available for pumps 1.5 hp and larger

BAC TECH TIP:

The pump is supplied with a bleed line and valve connected to the seal vent. This valve can be set to provide the proper bleed rate to

minimize impurities in the basin water.

Even if the basin bleed is accomplished by other methods, always leave the valve slightly cracked to prevent air binding in the pump.

PARTS & MAINTENANC E G UIDE 13

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

WATER DISTRIBUTION

Float Valves

› Rubber seal disc assures a positive shut-off to prevent

water waste

› Reliable stainless steel linkage in all kits

AVAILABILITY: 1/2” to 2” valves for all applications.

Float Balls

› Heavy-duty polypropylene construction resists cracking

› Foam-filled for structural rigidity and additional buoyancy

› Available in many sizes and configurations to ensure

positive shutoff

AVAILABILITY: 4 1/2” to 8” diameter and 10” pancake style

for all applications.

BAC CAUTION TIP:

Many commercially available float balls are hollow with no foam filling and are not suitable for the rigors of evaporative cooling

equipment. While operating, the inside of your equipment can resemble a hurricane with high winds and extreme temperature swings.

Without the added structural rigidity from the foam filling, the float ball may easily crack, allowing the float to fill with water, which

will cause the system to run improperly. Do not exceed 50 psi inlet water pressure to the float valve.

BAC TECH TIP:

Upon start-up, fill the tower to approximately 1/2” below the overflow level before starting the unit. This will provide enough water to

fill the rest of the system without draining the tower on start-up. After the system is running, adjust the water level as shown in your

Operation and Maintenance Manual. Monitor the operating level for the first 24 hours of operation to make sure it is set properly.

PVC Float Valve

Brass Float Valve

14 BALTIM ORE A IRC OIL COMPANY

WATER DISTRIBUTION

14 BALTIM ORE A IRC OIL COMPANY

Electric Water Level Control

› Universal mounting system fits any tower

› Completely sealed and waterproof

› Located inside the tower so no heat tracing is required

› 6 second time delay prevents short-cycling

› Plastic sheath on probes and stilling chamber prevents

false-cycling

› Requires 110 volt solenoid valve for operation

› Equipped with trouble shooting LED to diagnose water and

probe conditions

AVAILABILITY: 3-probe through 6-probe models for on/off, low water cut-out,

low water alarm, high water cut-out, and/or high water alarm.

Solenoid Valves

› Forged brass body for durability and high-pressure

applications

› Watertight electrical enclosure for outdoor use

› Slow-closing feature minimizes water-hammer on shut-off

› Valves are sized for a water pressure between 15 and 50 psig

at the valve inlet

AVAILABILITY: 3/8” to 2” with 110 volt normally closed holding coil.

BAC TECH TIP:

LED error codes can be found in the Universal Electric Water Level Control Installation, Operation & Maintenance Manual on BAC’s

website, www.BaltimoreAircoil.com.

PARTS & MAINTENANC E G UIDE 15

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

WATER DISTRIBUTION

Inlet Strainers

› Single point inlet provides automatic flow-balancing to both

hot water basins

› Inlet strainer protects water distribution nozzles from debris,

eliminating the need for a separate system strainer

› Large free-area inlet strainer minimizes pumping head

› Inlet strainer is easy to remove and clean

Series 3000 Cooling Towers built in 1991 through 2007 were equipped

with inlet strainers located in the BALANCE CLEAN

Chamber. The

BALANCE CLEAN

Chamber provides a single-point piping connection and

automatically balances the flow to both hot water basins. Contact your local

BAC Representative for replacement inlet strainers and options, such as winter

operation bleed down valves, that prevent freeze-up when the tower is shut

down.

Suction Strainers

› 3/16” strainer perforations help keep the system clean

› Strainer perforations are spaced to provide maximum strainer

free area for low pump suction losses

› Anti-cavitation design prevents air from reaching the system

pump

BAC offers many styles of suction strainers and suction hoods for just about

any application. Proper strainer design is critical to the total system operation.

It provides protection for the pump and keeps debris out of the condenser water

loop. BAC strainers are designed to offer optimum system protection while still

providing a full 50% free area to allow efficient system pump operation. Also

important, the anti-cavitation design is built into all BAC strainers. This keeps

air from entering the piping that would cause pump cavitation.

Inlet strainer

inspection for

Series 1500

Inlet strainer

inspection for

Series 3000

16 BALTIM ORE A IRC OIL COMPANY

WATER DISTRIBUTION

Combined Inlet Shields

› Available for the Series 3000E, Series 1500E, PT2, PF2, PFi,

PC2, PCC, FXV, FXV3, CXVT and CXVB units

› Prevent algae growth in the cold water basin

› Eliminate water splash out

› Prevent debris from entering the cold water basin

› Inlet shield is easy to remove and clean

› Separate from the fill and removable to allow easy access for

inspection of the air/water interface at the air inlet side of the

equipment

› Also available on the FXV and CXVB for installation above the

spray distribution system

Air Intake Louvers

› Wide spaced louvers reduce the potential for scale build-up

and damaging ice formations at the air/water interface by

providing an easy visual inspection from the outside of the

unit into the fill

› Standard air intake louvers are constructed of corrosion and

UV-resistant fiberglass reinforced polyester (FRP)

› Galvanized and stainless steel are available

PARTS & MAINTENANC E G UIDE 17

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

WATER DISTRIBUTION

Basin Heaters

› UL and CSA rated

› Durable copper heating elements for long life

› 2” MPT connection is easy to retrofit into any cooling tower

AVAILABILITY: 2 – 24 kW ratings, 50 watts/in

watt density

200, 230, 460, and 575 volt.

BAC stocks a complete line of immersion heaters to prevent cold water basin

freeze-up during winter weather. These heaters are selected for cooling tower

duty and are constructed with copper heating elements rated at 50 watt/in

with a 2” MPT brass connection and conduit box rated NEMA 4. Heaters are

suitable for use in all makes of evaporative cooling equipment.

Basin Heater Controls

› UL and CSA rated

› BAC thermostats and low water cutouts are designed to

ensure long life and proper operation

› Individual components or complete kits available

› Standard heater control panel consists of:

– S ingle probe to sense both water

temperature and water level

– Contactor(s)

– 24 Volt control circuit transformer

– NEMA 4 Enclosure

– UL Listed

18 BALTIM ORE A IRC OIL COMPANY

CONTROLS

Float Switch

› Single-pole, double throw, liquid level float switch

› Designed to maintain a liquid level in the cold water basin

› When liquid level rises above or falls below a certain point,

the switch will close one circuit and open a second

Mechanical

Vibration

Cutout Switch

Electronic

Vibration

Cutout Switch

Vibration Cutout Switches

› Protect your tower from damage resulting from excessive

vibration

› Mechanical or electronic switches are available with multiple

options for alarms and reset

› Electronic switches are compatible with building

management systems

BAC MAINTENANCE TIP:

Test vibration switches during seasonal start-ups to ensure proper operation.

See pages 38 & 39 in the Reference Section for Basic Operation and Troubleshooting of the Vibration Cutout Switches or contact your local

BAC Representative for more information.

PARTS & MAINTENANC E G UIDE 19

FIND YOUR REPRESENTATIVE:

BaltimoreAircoil.com/repfinder

Or Call:

800.896.8497

CONTROLS

› VFD Only: Includes a single VFD in a

weather-resistant enclosure sized to control

all fan motors on the unit

› Total Controls Package: Includes the

VFD Only PLUS sequencing and accessory

contactors

Benefits of BAC

Refrigeration Controls:

› Controls specifically designed for

industrial refrigeration applications

› Single point wiring (optional)

› UL/cUL listed

› All panel enclosures are NEMA 3R as standard

› Easy installation

› Total controls package

[1]

Communication Protocols limited to Modbus, Lonworks, Johnson N2, BACNet, and Siemens APOGEE.

Fan Starter(s)

Spray Pump Starter

Basin Heater

(s)

Vibration Cutout Switch Interface(s)

Electric Water Level Control Contactor(s)

Communication Card

[1]

Sequencing Logic

Weather-Resistant Enclosure

Start-Up

(Option)

Pressure Controller



VFD VFD

OPTIONAL OPTIONAL

VFD ONLY

TOTAL CONTROLS

PACKAGE

Modbus-standard Modbus-standard

CONTROLS

BAC Refrigeration Controls

20 BALTIM ORE A IRC OIL COMPANY

Performance

› Increase performance

and efficiency

› Restore lost performance

Ease of Maintenance

› Safety and access items

› Serviceability upgrades

Operational Items

› Capacity control and redundancy

› Controls

Sound

› Reduced sound levels

Retrofit and Rejuvenate Your Equipment

BAC offers a variety of retroﬁt kits and accessories to rejuvenate or maximize the performance

of your evaporative cooling equipment. Whether your unit appears to be on its last leg or brand

new, BAC parts and retroﬁt kits are available to bring it back to life or add features to meet the

needs of your projects.

RETROFITS

[1]

Communication Protocols limited to Modbus, Lonworks, Johnson N2, BACNet, and Siemens APOGEE.

PARTS & MAINTENANC E G UIDE 21

ENERGY SAVING RETROFITS

22 BALTIM ORE A IRC OIL COMPANY

Retroﬁt Opportunities

Water Distribution

Mechanical Drive Components

Fill

BAC VFD (Variable Frequency Drive)

A 2°F Decrease in Leaving Water Temperature Saves 6% in Electricity Costs

On average the HVAC system uses 25% of a building’s electricity. The slightest increase in

cooling tower leaving water temperature will result in signiﬁcantly higher energy costs.

Annual Cooling Tower Efficiency Savings

$5,306

$10,612

$15,918

1˚F 2˚F 3˚F

Cooling Tower Leaving Water Temperature Decrease

› Note 1: U.S. Energy Information Administration (EIA)

› Note 2: Savings are based on the energy costs for a 500 ton centrifugal chiller, 0.68 kW/ton chiller efficiency at full load, $0.12/kWh energy cost, $25/kW per

month, 80% ratchet demand charge, and 2,000 equivalent full load hours of operation.

SPOTLIGHT

ENERGY SAVING RETROFITS

Replace Nozzles

Broken or clogged nozzles cause uneven water distribution

over the fill, scale build-up, and decreased capacity.

Upgrade or Replace Drive Components

For increased building heat loads, BAC’s drive upgrade kits

will increase the capacity of your cooling tower.

To maintain the peak performance of your cooling tower,

replace your motors, drive sheaves, drive bushings and belts

with BAC Factory Authorized Parts.

Install New Fill

Replace scaled or clogged fill with BAC’s replacement fill

kits that are designed with state-of-the-art fill technology to

restore or increase the capacity of your cooling tower.

Install a VFD

Adding a Variable Frequency Drive will provide a more efficient

method of operating your cooling tower while extending the life

of the motor and mechanical drive system.

Contact your local BAC Representative for a free unit inspection

and consultation on Energy Saving Retrofits.

2% to 3% Energy Savings

3% to 7% Energy Savings

7% to 10% Energy Savings

30% to 40% Energy Savings

F Decrease in Leaving

Water Temperature

1-2

F Decrease in Leaving

Water Temperature

F Decrease in Leaving

Water Temperature

Pay Back Period: Less Than 1 Year

Pay Back Period: 2-3 Years

PARTS & MAINTENANC E G UIDE 23

SPOTLIGHT

BACross

Replacement Fill Kits

For FXT, Series 1500, Series 3000, FXV, FXV3,

CXV and CXVB

› Maintains thermal performance as originally certified by CTI

› Available in standard PVC for normal temperature

applications or CPVC for high temperature applications

VersaCross

Replacement

Fill Kits

› Outstanding thermal performance will meet or exceed the

performance of any OEM fill

› Fits most crossflow towers

› Quick and easy field installation saves labor

› Nested shipment requires smallest fill staging area and low

shipping costs

› Model-specific kits contain everything needed for an efficient

installation, including detailed instructions, supports,

hardware, and fill

› 2-week standard lead time

BAC TECH TIP:

Block fill is not recommended for use in BAC’s crossflow cooling products and may decrease the thermal capacity of the unit by 10%.

24 BALTIM ORE A IRC OIL COMPANY

RETROFITS

PROJECT SPOTLIGHT

BACount

Replacement

Fill Kits

For Series V Counterflow products

› Maintains the thermal performance as originally certified by

CTI

› Single-source responsibility, providing quality materials and

a guaranteed fit

› Available in standard PVC or CPVC for high temperature

applications

› Maintains 3/4” spacing to minimize fouling

BAC Pak™ Replacement

Fill Kits

For PT2 Counterflow products

› For use in counterflow and induced draft counterflow cooling

towers

› Pre-engineered kits to fit specific counterflow, and induced

draft counterflow cooling towers

› Easy to install

› All hardware and supports included

› Available in standard PVC or HPVC for high temperature

applications

BAC MAINTENANCE TIP:

Maintain or increase thermal capacity in all BAC counterflow cooling towers with BACount

Fill Kits. They offer the same

efficient heat transfer surface as currently supplied in new BAC towers, in an easy-to-install bundled configuration.

PARTS & MAINTENANC E G UIDE 25

RETROFITS

VersaCross

Replacement Fill improves thermal performance of the original

ﬁll by an average of 7.3% and 10% on other Manufacturers’ block ﬁll.

Customer Beneﬁts

› Only replacement hanging fill on the market

› Designed to meet or exceed original performance specifications

› Lower shipping costs versus block fill

› Nested shipments require smaller staging areas

› Fill fits in most Class A freight elevators

› Shorter lead time than block fill

Integrated Custom Features

› Includes integral louvers and drift eliminators to eliminate splashout and drift

› Formed from 15 mil self-extinguishing PVC

› Fits most BAC crossflow towers

› Suitable for maximum entering water temperature of 130˚F

Custom Installation Kit

Hanging PVC VersaCross

Fill

Fill hangers and supports

etailed instructions

Complete Hardware

26 BALTIM ORE A IRC OIL COMPANY

VERSACROSS

REPLACEMENT FILL

SPOTLIGHT

Internal and External Service Platforms,

Catwalks, and Walkways

› OSHA compliant

› Simplify maintenance

› Available in complete engineered kits

› Keep feet dry

› External service platforms allow for easy access to hot water basins or spray

distribution systems

› Internal walkways and internal platforms and ladders provide easy access to

drive components

BAC MAINTENANCE TIP:

Newer unit designs do not require routine maintenance on the fan deck. Louver face platforms allow easy access and

inspection of the water distribution area while the unit is in operation.

VERSACROSS

REPLACEMENT FILL

PARTS & MAINTENANC E G UIDE 27

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FANS & DRIVES

RETROFITS

FANS & DRIVES

RETROFITS

BAC MAINTENANCE TIP:

Ladders and handrails are available for access to the top of the equipment. If the end-user elects to use this alternative, the

addition to the installation will make routine maintenance easier, and improve overall performance and unit life expectancy.

All BAC safety and access retrofit packages meet OSHA requirements.

Pre-assembled Platforms

› OSHA compliant

› Increases the ease of maintenance

› Available on Series 3000, Series 1500, PC2, PT2, FXV, FXV3, PF2, CXVB, CXVT and VCA models

› Ships in modules for quick and easy installation

› Three configurations available for the VCA (flush, offset, and full perimeter)

28 BALTIM ORE A IRC OIL COMPANY

RETROFITS

Add Redundancy and Capacity Control

› ENERGY-MISER

/BALTIGUARD™ Fan System maximizes up-time

› Saves energy

› Maintains required performance for approximately 85% of the year, using only 1/3 of the full-load HP

› Utilizes standard, cooling tower duty motors for easy replacement: no need for two-speed or special

motors required

Redundancy – A simple solution to add redundancy is the ENERGY-MISER

/BALTIGUARD™ Fan System. This option adds a second

fan motor to the drive system. This second motor is usually sized at approximately 1/3 of the main motor horsepower. This allows the

smaller motor to operate around 85% of the year, while the larger main motor is only required on the hottest of days. Unlike a two-

speed motor, this causes less wear and tear on the fan motors and provides redundancy in case of a motor failure. In addition, the

single-speed motors are available “off the shelf” from BAC.

Capacity Control – The ENERGY-MISER

/BALTIGUARD™

Fan System also provides capacity control similar to a two-speed motor.

Another capacity control option is adding a VFD to control the motor speed. If you are thinking of converting to a VFD system, BAC can

supply the VFD and a fan motor built for that application; see page 20.

BAC TECH TIP:

The ENERGY-MISER

/BALTIGUARD™ Fan System utilizes the control and switch-gear of a two-speed, two-winding motor while

providing the security and economy of a redundant motor. You always have a motor, even if one motor fails.

PARTS & MAINTENANC E G UIDE 29

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FANS & DRIVES

RETROFITS

FANS & DRIVES

RETROFITS

Aluminum Sheave

and Bushing Kits

› Complete with bushing and special bushing bolts

› Special torque requirements and installation techniques

included with kit instructions

› Corrosion resistant aluminum allows for operation in the

moist cooling tower environment

› Available exclusively from BAC

› Designed for the specific power transmission required by the

motor and fan application

Aluminum Fan

and Bushing Kits

› Complete with bushing and special bushing bolts

› Special torque requirements and installation techniques

included with kit instructions

› Corrosion resistant aluminum allows for operation in the

moist cooling tower environment

› Available exclusively from BAC

› Designed for the specific airflow requirements

of the cooling tower

BAC MAINTENANCE TIP:

Proper installation of aluminum sheaves also requires the bolts to be tightened to the specific torque values as shown on

page 43. The chart also indicates the proper bushing type for each sheave.

30 BALTIM ORE A IRC OIL COMPANY

RETROFITS

Large Orifice Spray

Distribution Retrofits

› Large orifice grommeted nozzles can easily be retrofitted in

BAC’s older designed products and in other manufacturers’

units

› Grommetted installation makes spray branches and nozzles

easy to remove, clean, and replace

› Non-clogging, large-orifice nozzles

› Available in pre-engineered kits for your equipment

Low Sound Alternatives

› Intake and discharge attenuation packages are available

› Fully factory-tested and rated

› Can be used in conjunction with low sound fan options

› Available on both counterflow and crossflow products

BAC TECH TIPS:

Proper spray water distribution is important to the long-term efficiency of your cooling tower. A fully wetted coil or fill surface

will resist scaling and dirt build-up while maintaining peak thermal efficiencies.

Many replacement towers utilize axial fans instead of centrifugal fans. Axial fans produce higher sound levels than centrifugal

fans. Contact your local BAC Representative for sound ratings and sound solutions. Consult the BAC website,

www.BaltimoreAircoil.com, for more information on sound.

PARTS & MAINTENANC E G UIDE 31

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FANS & DRIVES

RETROFITS

Drift Eliminators

› Engineered for maximum performance and corrosion

resistance

› Available in PVC, thermosetting hybrid polymer, galvanized or

stainless steel construction

› Complete kits available

› Helps conserve water

Replacement Coils

BAC offers a large selection of coil conﬁguration options

to fulﬁll any thermal and pressure drop requirements for

both BAC and other manufacturers’ evaporative cooling

equipment.

› Industrial grade construction, ASME B31.5 compliant

› Standard patented serpentine coils are 16 gauge and HDGAF,

minimizing scale and fouling potential

› Materials of construction provide compatibility with virtually

any refrigeration, air conditioning, or process fluid system

› Construction options include:

– ASME “U” construction when conditions require

pressure vessel compliance

– Extended surface finned coils for plume reduction and

water savings

– Cleanable tubes or cleanable headers for dirty fluid

application

– Stainless Steel coils

– 14 gauge coils are also available

› CRN coils available for Canadian installations

32 BALTIM ORE A IRC OIL COMPANY

RETROFITS

Parts for all Evaporative Cooling Equipment

› BAC offers a full range of replacement products for other manufacturers units such as:

– Replacement coil and casing sections

– Motors

– Automatic Bearing Greasers

– Drive components including fans, shafts,

bearings, sheaves, and belts

– Fill and eliminators

– Spray distribution retrofit kits

– BAC Controls

– Heaters and heater controls

– Electric water level and make-up controls

– Vibration cutout switches

– Composite drive shafts

– Gears for all factory assembled cooling towers

› All BAC Parts are designed and manufactured

to meet BAC’s original quality standards

and are backed by a 1-year warranty

› Motors have a 5-year warranty, 7-year when installed with space heater

PARTS & MAINTENANC E G UIDE 33

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Or Call:

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FANS & DRIVESFANS & DRIVES

RETROFITS

Velocity Recovery Stacks

› Available on most Series 3000 Cooling Towers

› Increase thermal performance

› Maintain tower footprint

› Maintain existing CTI certification on Series 3000A and

3000C Cooling Towers

Drive System Upgrade

› Comprehensive option for upgrading cooling capacity

› Larger motor

› New sheave and belt configuration

› New fan and fan shafts available

Remember to specify

the ENDURADRIVE™

Fan System retrofit kit.

Details on page 8.

34 BALTIM ORE A IRC OIL COMPANY

RETROFITS

Davit Systems

› Facilitates motor replacement

› Removal system includes davit arm(s) and access

panels on the side opposite of the air inlet face on FXV

and CVXB only

› Series 3000, PT2, and PC2 davit allows for quick and

easy motor removal

› Davit on Series 3000 can be easily moved from cell to

cell as it simply slides and locks into socket

BAC Cooling Tower

Service Kits

› Psychrometer

› Infrared thermometer

› Conductivity meter

› A/C current clamp

› pH meter

› Heavy-duty, waterproof flashlight

› Handheld digital anemometer

› Megger

brand insulation tester

› Tool bag

AVAILABILITY: This kit contains measuring instruments

to cover a full range of service needs, including temperature,

air flow, electrical parameters, and water quality

measurements.

PARTS & MAINTENANC E G UIDE 35

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FANS & DRIVESFANS & DRIVES

RETROFITS

Maintenance Checklist for:

Cooling Towers, Closed Circuit Cooling Towers, and Evaporative Condensers

[1]

Inspect and clean as necessary: Start-Up Monthly Quarterly Annually Shutdown

Inspect general condition of the unit

[2]

and check unit for unusual noise or vibration

Inspect cold water basin

Flush water distribution system/inspect spray nozzles

Drain basin and piping

Inspect air inlet louvers/combined inlet shields

Check and adjust water level in basins

Check operation of make-up valve

Check and adjust bleed rate

Inspect unit ﬁnish

Mechanical equipment system: Start-Up Monthly Quarterly Annually Shutdown

Check belt condition

Adjust belt tension

[3]

Lubricate fan shaft bearings

Lubricate motor base adjusting screw

Check and lubricate optional gear drive

See product speciﬁc O&M Manual for detailed instructions and schedule

Check drive alignment

Check motor voltage and current

Clean fan motor exterior

Check fan motor for proper rotation

Check general condition of the fan

Check and unplug fan drain holes (hollow blade fans)

Check fan for uniform pitch

Check fan for rotation without obstruction

Check and recoat steel shafts with RUST VETO

NOTES:

1. Consult your product speciﬁc O&M Manual before conducting maintenance on the unit. Recommended service intervals are the minimum for

typical installations. Different environmental conditions may dictate more frequent servicing.

2. When operating in ambient temperatures below freezing, the unit should be inspected more frequently. Refer to the “Cold Weather Operation”

section of the Operation and Maintenance Manual for more details.

3. Tension on new belts must be readjusted after the ﬁrst 24 hours of operation and quarterly, thereafter.

WARNING: Do not perform any service on or near the fans, motors, and drives, or inside the unit without ﬁrst ensuring that the fans and pumps are

disconnected, locked out, and tagged out.

36 BALTIM ORE A IRC OIL COMPANY

Basic Recommended Spare Parts

s Bearing set

s Float valve

s Float ball

s Solenoid valve (if unit is equipped with electric water

level control)

s Powerband or set of belts

s Spray nozzle kit with grommets

s Basin heater and low water cut out

s Door gasket

s Strainer (inlet and suction)

s Fan and sheave bushings

s Pump seal and gasket kit for coil products

s Automatic bearing greaser refill kit

Parts to Consider if Extended

Downtime is a Concern

s Spray pump for coil products

s Axial or centrifugal fans

s Fan shaft

s Sheave set

s Fan motor

s Electric water level control

BAC Factory Authorized Parts are manufactured to meet rigorous cooling tower duty specifications and are guaranteed to fit your unit and perform as

original equipment.

BAC Factory Authorized Parts can be ordered through your local BAC Representative or online at www.CoolingTowerWorld.com. Most BAC Representatives maintain

a local inventory of commonly used parts. For a free unit inspection, call your local BAC Representative today.

Even with BAC’s fast delivery capability, it is still recommended that certain essential, emergency repair parts be maintained in your inventory to minimize any

potential downtime.

Recommended Spare Parts

PARTS & MAINTENANC E G UIDE 37

REFERENCE

A. Checking the Installation

The electronic VCOS is the standard switch used by BAC. This switch is rated

for 5 amps continuous duty and for in-rush of 25 amps for 1 sec

or 50 amps for 16 msec. This is ideal when wiring the switch to a motor

starter system, since the bigger the motor, the higher the current on the starter.

A computerized Building Management System (BMS) works on a very low

current draw. Therefore, some additional measures must be taken when

wiring the VCOS to a BMS. For the VCOS to turn on and stay on, it needs to

be connected to a load that draws a minimum of 50mA. Without this current

draw, the switch may not stay closed or “pulled in”. In this case, a 2000-ohm,

10-watt resistor can be wired in parallel with the BMS input. An interposing

relay (SPDT, class C) can also be installed to draw the 50mA.

B. Reset and Lockout Circuits

BAC supplies the switch prewired with 7’ of 20 Ga., UV resistant shielded

cable. When this cable is removed and other wiring supplied to the switch by

the customer, make sure that the reset and lockout terminals (terminals 5, 6,

and 7) are shielded from the rest of the wires.

The switch comes from the factory with terminals 5 and 6 connected together

with a wire nut, which enables the local reset circuit. This means that when the

switch trips, the pushbutton on the side of the switch must be used to reset it.

If this wire nut is removed, and nothing is connected to terminals 5 and 6, the

switch is not latched. This means that when the switch trips due to excessive

vibration, the switch will automatically reset itself once the vibration level

drops. This will cause the fans to restart automatically.

When a remote reset is desired, terminals 5 and 6 are wired to a pushbutton at

the desired remote location. Be sure to use shielded cable.

C. Mounting

The vibration switch must be mounted rigidly to the unit, ensuring that the

mounting brackets are stiffened to avoid any resonant builds that could cause

nuisance trips. Contact your local BAC Representative with any questions

regarding the installation of the VCOS for your specific equipment model.

D. Testing Basic Operation

The switch can be bench-tested or tested after it is mounted on the unit. For

safety reasons, the cooling system must be off during testing. Follow these

easy steps to test the proper operation of the vibration switch.

Testing time delay

The time delay is field adjustable from 1 to 15 seconds. It is set at the factory

to approximately 3 seconds.

a. Connect 110 or 220 volts to terminals 1 and 2 as per the appropriate wiring

diagram. Contact your local BAC Representative if you do not have this

diagram.

b. Jumper terminals 1 and 3 together.

c. Connect a 25-watt light bulb to terminals 2 and 4.

d. Since the switch comes from the factory with the slide switch in the N/C

position (see wiring diagram for the slide switch location), the light bulb

should turn on immediately. Set slide switch to the N/O position. The

light bulb should turn off. This assures that the triac relay is operating

properly.

e. Return the slide switch to the N/C position.

f. Turn the set point control knob counterclockwise to the test position. The LED

above the knob should turn on immediately. After approximately 3 seconds,

the triac changes state and the light bulb should turn off.

g. Return the set point control knob to the normal setting (0.45 in/sec).

h. If the switch is wired for local reset (5 and 6 wired together), depress the

pushbutton on the side of the vibration switch to return it to the non-alarm

condition.

i. If there is no connection across terminals 5 and 6, the switch will

automatically reset to the non-alarm condition.

j. To increase or decrease the time delay, turn the adjustment screw that

is located directly below the set point control knob. One full clockwise

turn increases the time delay by approximately 1/2 a second. One full

counterclockwise turn decreases the time delay by approximately 1/2 a

second.

If the vibration switch fails in any of the above steps, the switch should

be returned to the factory for repair or replacement. Contact the local BAC

Representative for more information.

Basic Operation and Troubleshooting of

BAC Electronic Vibration Cutout Switches (VCOS)

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BAC Mechanical Vibration

Cutout Switches (VCOS)

a. The vibration setpoint adjustment is accessible externally. Turning the

setpoint adjustment clockwise (CW) increases the vibration setpoint.

b. When the switch is shipped from the factory, the setpoint adjustment is set

to 2g when installed in the vertical position and 1g when installed in the

horizontal position (with reference to the setpoint adjustment shaft).

c. To check factory calibration, place the unmounted unit in your hand and

rotate per Diagram D. The switch(es) should activate at dead bottom

position. If necessary, adjust setpoint using setpoint adjustment screw.

d. To preset switch at other than factory setpoint, start with step three (3) and

then rotate adjustment screw 1/8 turn per g until you reach the required set

point.

e. To adjust setpoint when installed on the machine, mount and wire the unit.

Reset the switch by depressing the reset plunger and start the machine.

When the machine has reached full speed, slowly turn the vibration

setpoint adjustment counter clockwise until the switch tips. Then turn the

adjustment clockwise a small amount (approx. 1/8 turn). Try to reset the

switch; if the switch does not reset, turn another 1/8 turn clockwise and

repeat in increments of 1/8 turn until you are able to reset the switch. Reset

the switch and restart the machine to determine whether the machine

starting roughness will cause the switch to trip, in which case it may be

necessary to increase the setpoint.

Diagram D

Typical Installation Diagram

PARTS & MAINTENANC E G UIDE 39

REFERENCE

Fan Shaft Bearing Maintenance

Ball Bearings:

Seasonal shutdown and start-up:

When shutting your unit down for an extended period and before starting up after an extended shutdown, always purge the fan shaft bearings with new grease.

Lubrication Schedule:

s Induced draft products – Lubricate the bearings at least every three months.

s Forced draft products – Lubricate the bearings every 2000 hours of operation or every six months, whichever occurs first.

Greasing:

Bearings should only be lubricated with a hand grease gun or the automatic bearing greaser. When lubricating, purge the old grease from the bearing by gradually

adding grease until a bead of new grease appears at the bearing seal.

Type of Grease:

Only use one of the following greases, as they are compatible with the grease installed at the factory:

s Citgo Polyurea MP2™

s Conoco Polyurea 2™

s Exxon Polyurex

s Exxon Unirex N™

s Mobilgrease

AW2

s Shell Alvania RL3™

s SKF LGHP2™

s Unocal 76 Unolife Grease™

Sleeve Bearings:

Start-up:

Prior to start-up and during the first week of operation, the bearing oil cup must be refilled with an industrial-type mineral oil to saturate the wick in the bearing

reservoir. After the initial start-up, fill the bearing oil cup every 1000 operating hours or every six months.

Type of Oil:

s 0ºF to 110ºF - BAC #582628P1, normal temperature range

s -25ºF to 30ºF - BAC #582627P1, low temperature range

BAC CAUTION TIP:

Sleeve Bearings: Do not use oils containing detergents. Detergent oils will remove the graphite in the bearing sleeve and cause

bearing failure.

Ball Bearings: Do not use high pressure grease guns, as they may rupture the bearing seals.

40 BALTIM ORE A IRC OIL COMPANY

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Belt Tensioning

After initial tower start-up or the installation of a new belt, the belt tension

must be readjusted after the first 24 hours of operation. The condition of the

belt and belt tension should then be checked and adjusted quarterly.

To check the belt tension, place a straight edge along the belt from sheave to

sheave or, alternatively, use a tape measure as shown.

Apply a moderate force by hand (approximately 40 lbs) evenly across the

width of the belt in the center of the span between the two sheaves. If the belt

deflects between 1/4" and 3/8" as shown, the belt is adequately tensioned.

Sheave Alignment

As with proper belt tensioning, good sheave alignment will result in both

maximum performance and maximum belt life. Therefore sheave alignment

should be checked annually.

To check alignment, place a straight edge across the driver and driven sheaves

as shown in the figure for standard drive systems or the figure for the Energy-

Miser

/BALTIGUARD™ Fan System.

When the drives are properly aligned, the straight edge will contact all points

as indicated. There should be no more than 1/16" deviation from four-point

contact.

If realignment is necessary, loosen the motor sheave and align it with the fan

sheave and be sure to allow approximately 1/4" for draw-up as the bushing

screws are retightened.

Standard Drives

BALTIGUARD™/BALTIGUARD PLUS™

Fan System

PARTS & MAINTENANC E G UIDE 41

REFERENCE

Aluminum Fan & Bushing Installation Instructions

Bushing Installation Instructions:

1. Failure to follow these instructions may result in a cracked hub.

2. Do not use “Never Seize” or any lubricants on the bolts, bushings or shaft.

3. Do not attempt to bottom out the bushing in the aluminum fan hub. After proper bolt torque is applied, there should be a gap between the

bushing flange and fan hub.

4. Use the longest bolts provided with the bushing kit.

5. Wipe the shaft, bushing bore, bushing taper, and fan hub bore with a cleaning solvent to remove any dirt and oil.

6. Tighten each bolt a little at a time so that the bushing draws evenly into the fan hub without cocking to one side or the other. Torque the bolts as specified on the

chart above. Rotate the shaft to verify that it does not wobble.

CAUTION: READ COMPLETE INSTRUCTIONS BEFORE PROCEEDING:

Fan Type Product Type Bushing Type Bolt Torque (FT-LBS)

A FXT H 8

A VCA P 16

A VCA Q 29

B FXV and CXV Q 29

C PT2, Series 3000, Series 1500, FXV3 and CXVB, PC2 Q 29

C Series 3000 R 29

C Series 3000 E 22

BAC aluminum fans are installed using a standard cast iron bushing with special length bolts. The proper bolts are provided with each bushing kit. Proper

installation also requires the bolts to be tightened to the specific torque values for each fan and bushing type, as shown on the chart below.

Fan Type B

CXV and FXV

Fan Type C

Series 3000, PT2, PC2, FXV3 and CXVB

Fan Type A

Series 1500, VC2, VCA, and FXT

42 BALTIM ORE A IRC OIL COMPANY

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Aluminum and Cast Iron Sheave

Bushing Installation Instructions

Read complete instructions before proceeding:

1. Wipe the shaft, bushing bore, bushing taper, and sheave bore with a cleaning solvent to remove any dirt or oil.

2. Tighten each bolt a little at a time so that the bushing draws evenly into the sheave hub without cocking to one side or the other. Torque the bolts as

specified on the chart below. Rotate the sheave to verify that it does not wobble.

3. Do not attempt to bottom-out the bushing in the sheave. After proper bolt torque is applied, there should still be a gap between

the bushing flange and the sheave hub.

Aluminium Sheave Size Bushing Type Bolt Torque (FT-LBS)

2B3.6 to 2B4.4 SH 6

2B4.6 to 2B6.8 SDS 6

2B7.0, 2B16.0 SK 13

2B20.0 SF 22

4B4.2 to 4B6.6 SD 6

4B6.8 to 4B9.4 SK 13

4B16.0, 4B20.0 SF 19

4B25.0, 5B25.0 E 35

6B5.0 to 6B5.4 SD 6

6B5.6 to 6B6.8 SK 13

6B7.0, 6B7.4, 6B9.4 SF 22

6B30.0, 6B38.0 E 35

8B5.6 SK 13

8B7.4 to 8B8.2 SF 22

8B8.8 to 8B9.4 E 35

8B38.0, 8B50.0 F 55

Cast Iron Sheave Size Bushing Type Bolt Torque (FT-LBS)

3B38, 4B25 to 4B38, 5B20 to 5B38, 6B20 to 6B38 E 60

2B25 to 2B38, 3B20 to 3B30, 4B15.4 to 4B20, 5B7.0 to 5B18.4, 6B7.0 to 6B18.4 SF 30

3B4.6 to 3B6.8, 4B3.4 to 4B6.8, 5B3.4 to 5B5.2, 6B3.4 to 6B5.2 SD 9

1B3.4 to 1B4.4, 2B3.4 to 2B4.4,3B3.4 to 3B4.4 SH 9

1B4.6 to 1B13.6, 2B4.6 to 2B6.8 SDS 9

1B15.4 to 1B20, 2B7.0 to 2B18.4, 3B7.0 to 3B18.4, 4B7.0 to 4B13.6, 5B5.4 to 5B6.8,

6B5.4 to 6B6.8

SK 15

BAC CAUTION TIP:

Failure to follow these instructions may result in a cracked sheave! Do not use “Never Seize” or any lubricants on

the bolts!

PARTS & MAINTENANC E G UIDE 43

REFERENCE

Horizontal Axial Fan Assembly

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Centrifugal Fan Assembly

PARTS & MAINTENANC E G UIDE 45

REFERENCE

Vertical Axial Fan Assembly

46 BALTIM ORE A IRC OIL COMPANY

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Motor Orientation

BAC motors come in a variety of orientations as shown in the table below. Use this table to determine the standard motor configuration in your unit and use

the chart below to confirm this is what has been supplied

Model Motor Type

Motor Orientation,

Right-hand Configuration

Motor Orientation,

Left-hand

Configuration

Series V TEFC F2-Standard, F1-Pony F1-Standard, F2-Pony

VTL, VFL, VCL TEFC F2-Standard, F1-Pony F1-Standard, F2-Pony

VC2 TEFC

C1-Standard

W1 & W2 Independent Fans

C1-Standard

W2 & W1 Independent Fans

FXT TEFC Contact your local BAC Representative

CFT TEAO W7

1500, FXV (single), CXVB TEAO W8-Standard, W5-Pony or Independent Fans

3000, FXV3, CXVT

TEAO

(TEFC with ext. motor)

W6-Belt Drive

F1-Gear Dive

N/A

PT2, PC2

TEAO

(TEFC with ext. motor)

W8-Internal Direct Drive and External

W6-Internal Belt Drive

VCA TEFC F2 F2

VCA (End Blow Units) TEFC C1 C1

BAC TECH TIP:

TEAO: Totally Enclosed, Air Over. These motors are mounted in, and cooled by, the air stream of the unit.

TEFC: Totally Enclosed, Fan Cooled. These motors are outside the air stream of the unit; therefore, a cooling fan is required on the motor

to prevent overheating.

PARTS & MAINTENANC E G UIDE 47

REFERENCE

Pump Selection – Common Pumps

All part #’s are for 230/460 volt pumps.

Contact your local BAC Representative for other voltages.

Product Line Box Size HP RPM Pump P/N

Pump Seal

Kits

PC2

4 x 6 1 3500 300211 300472

4 x 12 1 1/2 1750 301204 300655

7.4 x 9 2 1750 300517 300655

7.4 x 18 5 1750 300526 300656

10 x 12 5 1750 300526 300656

12 x 12 5 1750 300563 300656

12 x 18 7 1/2 1175 301203 301382

FXV/CXVB

(2011 - Present)

8.5 x 6 2 1750 301308 300655

8.5 x 9 5 1750 301309 300656

8.5 x 12 5 1750 301310 300656

8.5 x 12 7 1/2 1750 301311 300656

10 x 12 7 1/2 1750 301311 300656

10 x 18 10 1175 301312 301382

12 x 12 7 1/2 1750 301311 300656

12 x 18 10 1175 301312 300656

FXV/CXV

(1995-2011)

8.5 x 6 1 1/2 3500 300605 300472

8.5 x 9 2 1750 300517 300655

8.5 x 12 3 1750 300916 300656

12 x 12 5 1750 300563 300656

12 x 18 7 1/2 1750 300931 300656

12 x 24 (2) 5 1750 300563 300656

FXV3 and CXVB

12 x 24 (2) 7 1/2 1750 300931 300656

14 x 26 (2) 7 1/2 1750 300931 300656

Low Proﬁle VFL/VCL

4 x 3 1/3 3500 300586 300472

4 x 6 1/2 3500 300587 300472

4 x 9 1 3500 300588 300472

4 x 12 1 1/2 3500 300605 300472

8 x 9 1 1/2 1750 300590 300655

8 x 12 2 1750 300591 300655

BAC CAUTION TIP:

Shaft sleeve part number 300388 will need to be ordered with all seal kits for pumps 1 1/2 Hp and larger.

DISCONTINUED

48 BALTIM ORE A IRC OIL COMPANY

Product Line Box Size HP RPM Pump P/N

Pump Seal

Kits

Series V

3 x 3 1/3 3500 300214 300472

3 x 6 1/2 3500 300213 300472

3 x 9 3/4 3500 300212 300472

3 x 12 1 3500 300211 300472

4 x 12 1 1/2 3500 300210 300472

6 x 12 2 1750 300517 300655

8 x 12 3 1750 300520 300655

8 x 18 5 1750 300523 300656

8 x 18 5 1750 300526 300656

10x12 5 1750 300901 300655

10x18 5 1750 300678 300656

12 x 12 5 1750 300526 300656

12 x 18 5 1750 300563 300656

12 x 18 7 1/2 1750 300931 300656

PF2

4 x 6 3/4 3500 301316 300472

4 x 12 1 3500 300588 300472

4 x 12 (12 Row) 1 3500 301318 300472

7.4 x 9 1 1/2 3500 300605 300472

7.4 x 18 3 1750 301325 300656

10 x 12 (8 & 10 Row Single Cell) 2 1750 301326 300655

10 x 12 (12 & 14 Row Single Cell) 2 1750 301308 300655

10 x 12 (8 & 10 Row Dual Cell) 2 1750 301308 300655

10 x 12 (12 & 14 Row Dual Cell) 2 1750 300591 300655

12 x 12 (Single Cell) 5 1750 300523 300656

12 x 12 (Dual Cell) 5 1750 300526 300656

12 x 12 (Quad Cell) 5 1750 300563 300656

12 x 18 (Single & Dual Cell) 5 1175 301331 300474

12 x 18 (Quad Cell) 5 1175 301335 300474

VCA

5 x 12 1 1/2 3500 300210 300472

6 x 12 2 1750 300561 300655

8 x 12 3 1750 300916 300656

8 x 18 5 1750 300526 300656

10 x 12 5 1750 300526 300656

10 x 18 7 1/2 1750 300931 300656

12 x 12 5 1750 300526 300656

12 x 18 7 1/2 1750 300931 300656

BAC CAUTION TIP:

Shaft sleeve part number 300388 will need to be ordered with all seal kits for pumps 1 1/2 Hp and larger.

PARTS & MAINTENANC E G UIDE 49

REFERENCE

A proper water treatment program, administered under the supervision

of a competent water treatment specialist, is an essential part of routine

maintenance to ensure the safe operation and longevity of evaporative cooling

equipment, as well as other system components.

In evaporative cooling products, cooling is accomplished by evaporating a

small portion of the recirculating water as it flows through the unit. As the

water evaporates, the dissolved solids originally present in the water remain

behind and if not controlled, the concentration of dissolved solids will increase

rapidly. This can lead to corrosion, scale or biological fouling which may

negatively affect heat transfer as well as the longevity of system components.

s Corrosion – Red rust on steel components and white rust on galvanized

surfaces may affect the longevity of system components.

s Scale formation – Scale, typically a calcium or magnesium based build-

up, not only reduces heat transfer and system efficiency, but may also

lead to under deposit corrosion. If scale is not controlled, it may contiunue

building on critical components such as the fill, and severely impact thermal

performance.

s Biological Fouling – Slime and algae formations may reduce heat

transfer, promote corrosion, and harbor pathogens such as Legionella.

Each of these aspects of water quality is discussed in greater detail below.

Since the quality of the ambient air and make-up water varies significantly

from job site to job site, BAC strongly recommends obtaining the services

of a competent water treatment agency prior to the initial start-up of the

evaporative cooling equipment. Additionally, to protect against the risk of

Legionella contamination, the cooling equipment should never be operated

without adequate biological control.

Corrosion and Scale Control

To control corrosion and scale, maintain the water chemistry

of the recirculating water within the parameters listed in

Table 1 on the following page. The specific measures required vary from system

to system and are dependent on the chemistry of the make-up water, the

metallurgy of the piping and heat transfer devices exposed to the recirculating

water, and the temperatures at which the system will be operating. Bleed/

blowdown, the continuous flow of a small portion of the recirculating water

to a drain, is used to control the concentration of dissolved solids. On rare

occasions, this may be adequate to control scale and corrosion. More often,

chemical scale and corrosion inhibitors are necessary, which raise the

allowable level of dissolved solids without the risk of scale and corrosion.

Keep the chemically treated water within the guidelines given in Table 1 .

In cases where bleed/blowdown alone is being employed for corrosion and

scale control without chemical treatment your water treatment specialist may

recommend more conservative limits than those shown in Table 1 .

Chemical Treatment Requirements

Chemical treatment programs must meet these requirements:

The chemicals must be compatible with the unit materials of

construction as well as other materials used in the system (pipe, heat

exchanger, etc.).

BAC discourages acid dosing as means of scale control except for

open circuit cooling towers with remote sump applications or towers

constructed from stainless steel. This should be done at a point in

the system where total mixing and dilution occur before reaching

the evaporative cooling equipment. The preferred injection point for

chemical scale and corrosion inhibitors is on the discharge side of the

system circulating pump(s). These chemicals should not be batch fed

directly into the unit’s cold water basin or water distribution system,

as this can severely damage areas directly contacted.

When chlorine is added to the system, free residual chlorine should

not exceed 1 ppm, except as noted in start-up and shutdown section.

Exceeding this limit may accelerate corrosion.

Passivation

When new systems are ﬁrst commissioned, special measures should be taken

to ensure that galvanized steel surfaces are properly passivated to provide

maximum protection from corrosion. Passivation is the formation of a protective,

passive, oxide layer on galvanized steel surfaces. To ensure the galvanized steel

surfaces are passivated, the pH of circulating water should be kept between 6.5

and 8.2 and calcium hardness between 50 and 600 ppm (as CaCO

) for four

to eight weeks after start-up, or until new zinc surfaces turn dull gray in color.

If white deposits form on galvanized steel surfaces after the pH is returned to

normal service levels, it may be necessary to repeat the passivation process.

In case the pH can’t be kept below 8.2, a secondary approach is to conduct a

chemical passivation using inorganic phosphate or ﬁlm-forming passivation

agents. Consult your water treatment specialist for speciﬁc recommendation.

Biological Control

The warm, oxygen and nutrient rich environment inside evaporative cooling

equipment provides an ideal environment conducive to the growth of algae,

slime, and other micro-organisms. Uncontrolled, this can reduce heat trans-

fer, promote corrosion, and promote the growth of potentially harmful organ-

isms such as Legionella. To avoid biological contamination and minimize

the risk of Legionella, initiate the biocide treatment program at start-up and

continue on a regular basis thereafter in accordance with the treatment sup-

plier’s instructions. Bleed/blowdown or chemical treatment used for corrosion

and scale control alone is not adequate for control of biological contamina-

tion. Introduce solid or granular biocides through a chemical “pot” feeder

installed in parallel with the system circulating pump. Diluted liquid biocides

may be added directly to the cold water basin.

Water Quality Guidelines

NOTE:

Since the quality of the ambient air and make-up water

varies signiﬁcantly from job site to job site, BAC strongly

recommends obtaining the services of a competent water

treatment specialist prior to the initial start-up of the

evaporative cooling equipment. Additionally, to protect

against the risk of Legionella contamination, never operate

the cooling equipment without adequate biological control.

NOTE: Stainless steel cold water basins and basins protected by the

TriArmor

Corrosion Protection System or thermosetting hybrid polymer

do not require passivation. However, if the upper structure is galvanized

steel, passivation is required. Closed circuit cooling towers and

evaporative condensers with galvanized coil require passivation.

50 BALTIM ORE A IRC OIL COMPANY

Initial Start-up & Start-up Following a Shutdown Period

To minimize the risk of biological contamination during a shut-down period

of three days or more, it is recommended that the entire system (evaporative

cooling equipment, system piping, heat exchangers, etc.) be drained. To

resume operation of a drained system and at initial start-up, clean all

debris from the cold water basin and ﬁll the system with fresh water. Then

execute one of the following biocide treatment programs while operating the

circulating pump and prior to operating the unit fans:

Resume treatment with the biocide that was used prior to shut-

down. Operate the pump only while maintaining the maximum

recommended biocide residual for a sufﬁcient duration (residual

and time will vary with the biocide) as recommended by the water

treatment supplier. Start the fan only after this treatment period is

completed.

Check the pH of the circulating water and, if necessary, adjust it

to 7.0 - 7.6 pH. Then, running the pump only, treat the system with

sodium hypochlorite to maintain a level of 4 to 5 mg/l (ppm) free

chlorine (as Cl

) over a six hour period. Test kits for measuring the

free residual of chlorine are commercially available. Start the fan

only after this treatment period is completed.

When it is not practical to drain the system during shut-down periods, install

a by-pass line with shut-off valves to permit the recirculating water to

circulate throughout the system, including the unit basin, while bypassing

the ﬁll section of the evaporative cooling equipment (fans should remain off).

Treat the system as per one of the above-described methods prior to restarting

the unit.

System Cleaning for Coil Products

This section is applicable to BAC Closed Circuit Cooling Towers and

Evaporative Condensers only.

The outside of the heat exchange coil may require occasional cleaning.

The chemicals used must be compatible with the materials being treated.

For example, the standard coil is galvanized steel on the outside. The inside of

the coil is black carbon steel. For ﬁnned coils, the coil cleaning must be careful

not to damage the ﬁns (outside of the coils) and the coils themselves. For speciﬁc

recommendations on coil cleaning, contact a qualiﬁed consultant.

Closed Circuit Cooling Towers

With proper precautions, prior to start-up circulate an alkaline solution which can be

used to clean condenser water systems through a closed circuit cooling tower. The

necessary precautions include:

s,IMITTHEDURATIONOFTHECLEANINGTOONEDAYORATTHEMOSTTWODAYS

s4HETEMPERATUREOFTHESOLUTIONSHOULDNEVEREXCEED&#

s4HEMAXIMUMCONCENTRATIONOFCHEMICALSINTHECIRCULATIONSOLUTIONSHOULDNOT

exceed any of the following:

– 5% Sodium Hydroxide

– 5% Sodium Metasilicate

– 2% Sodium Carbonate

– 2% Tetra Sodium Pyrophosphate

– 0.5% Trisodium Phosphate

– 0.5% Sodium Nitrate

– 5-10% Butyl Cellosolve

while bypassing the ﬁll section of the evaporative cooling equipment (fans

should remain off). Treat the system as per one of the above-described methods

prior to restarting the unit.

Evaporative Condensers

The installation and manufacturing processes commonly used for ﬁeld assembly of

steel-piped systems may leave weld byproducts inside coils and connecting piping

(especially in refrigeration systems). It is common practice to install ﬁlters and/

or strainers that remove contaminants during initial system operation. Shortly after

system startup, the ﬁlters and/or strainers should be cleaned or replaced.

Table 1. Quality Guidelines for Treated Circulating Water

Property of Water

Recommended Levels for Various Materials of Construction

Galvanized Steel Thermosetting Hybrid Polymer Type 304 Stainless Steel

TriArmor

Corrosion Protection

System or Type 316

Stainless Steel

6.5 to 9.0

[1]

6.5 to 9.2

[1]

6.5 to 9.2

[1]

6.5 to 9.5

[1]

Total Suspended Solids

25 ppm 25 ppm 25 ppm 25 ppm

Total Dissolved Solids (TDS)

1,500 ppm 2,050 ppm 2,050 ppm 2,500 ppm

Conductivity

2,400 (micromhos/cm) 3,300 (micromhos/cm) 3,300 (micromhos/cm) 4,000 (micromhos/cm)

Alkalinity as CaCO

500 ppm

[2]

600 ppm

[2]

600 ppm

[2]

600 ppm

[2]

Calcium Hardness as CaCO

50 to 600 ppm

[2]

50 to 750 ppm

[2]

50 to 750 ppm

[2]

50 to 750 ppm

[2]

Chlorides (CL)

250 ppm 300 ppm 300 ppm 750 ppm

Sulfates

250 ppm 350 ppm 350 ppm 750 ppm

Silica

150 ppm 150 ppm 150 ppm 150 ppm

NOTES:

1. Galvanized steel units require passivation in order to prevent white rust (refer to “Passivation”).

2. Hardness and alkalinity limits may be exceeded under certain circumstances. Consult your water treatment specialist for recommendations.

3. The conversion factor used to determine conductivity is 0.625 (TDS = 0.625 x Conductivity).

4. EVERTOUGH™ Construction units have a TriArmor

Corrosion Protection System basin.

5. The guidelines above refer to the materials used in construction. Different combinations of materials may be used on the same unit.

6. Water chemistry will change with operating temperatures. The recommended guidelines listed in Table 1 refers to water temperature at 95˚F.

PARTS & MAINTENANC E G UIDE 51

REFERENCE

52 BALTIM ORE A IRC OIL COMPANY

For complete alignment instructions and tolerances, please contact your local BAC Representative.

Alignment Instructions for Gear Drive Composite Shafts

NOTE: Both angular and axial alignment must be checked to properly align a gear coupling.

ANGULAR ALIGNMENT

Angular alignment requires the use of a dial indicator position as indicated in figure below. With the dial indicator set to zero, check the shaft alignment by rotating

the shaft and recording the maximum and minimum reading on the dial indicator.

AXIAL ALIGNMENT

The axial misalignment must also be checked. Use a caliper as shown in the figure below and take four readings around the perimeter at 90º intervals. Do this

without rotating the coupling.

BAC CAUTION TIP: All couplings must be covered with a guard per OSHA requirements.

www.BaltimoreAircoil.com

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Table of Contents

What’s New

PA GE 1

Fans and Drives

Whisper Quiet Fans

PA GE 3

Fans and Drives

Axial Fans

PA GE 2

Fans and Drives

Solid Shafts

PA GE 3

Fans and Drives

Hollow Shafts

PA GE 3

Fans and Drives

Centrifugal Fans

PA GE 2

BAC Picture Index of Parts

Fans and Drives

Cast Iron Bushings & Sheaves

PA GE 7

Fans and Drives

Induced Draft Bearing

PA GE 6

Fans and Drives

Bearing Greaser Options

PA GE 5

Fans and Drives

ENDURADRIVE

Fan System

Spotlight

PA GE 11

Fans and Drives

Forced Draft Bearing

PA GE 6

Fans and Drives

Aluminum Sheaves

PA GE 7

Fans and Drives

Automatic Bearing Greaser

PA GE 4

Water Distribution

Spray Pumps

PA GE 13

Water Distribution

Water Distribution Nozzles

PA GE 12

Water Distribution

Float Balls

PA GE 14

Water Distribution

Float Valves

PA GE 14

Water Distribution

Spray Branches

PA GE 12

Water Distribution

Pump Parts

PA GE 13

Water Distribution

Solenoid Valves

PA GE 15

Controls

Basin Heaters

PA GE 18

Water Distribution

Combined Inlet Shields

PA GE 17

Water Distribution

Electric Water Level Control

PA GE 15

Controls

Basin Heater Controls

PA GE 18

Water Distribution

Suction Strainers

PA GE 16

Retrofits

Retrofit your Equipment

PA GE 21

Controls

Refrigeration Controls

PA GE 20

Controls

Float Switch

PA GE 19

Retrofits

Energy Savings Spotlight

PA GE 22

Controls

Vibration Cutout Switch

PA GE 19

Retrofits

BACross

Replacement Fill Kits

PA GE 24

Retrofits

Platforms, Catwalks, and

Walkways

PA GE 27

Retrofits

Pre-Assembled Platforms

PA GE 28

Retrofits

BAC Pak™ Replacement Fill Kits

PA GE 26

Retrofits

BACount

Replacement

Fill Kits

PA GE 25

Retrofits

VersaCross

Spotlight

PA GE 26

Retrofits

VersaCross

Replacement

Fill Kits

PA GE 24

Retrofits

Aluminum Sheave and

Bushing Kits

PA GE 30

Retrofits

Add Redundancy and Capacity

PA GE 29

Retrofits

Replacement Coils

PA GE 32

Retrofits

Large Orifice Spray

PA GE 31

Retrofits

Aluminum Fan & Bushing Kit

PA GE 30

Retrofits

Low Sound Alternatives

PA GE 31

Retrofits

Parts for other Manufacturers’

Equipment

PA GE 33

Reference

Reference Materials

PA GE 37 - 52

Reference

Maintenance Checklist

PA GE 36

Retrofits

Davit Systems

PA GE 35

Retrofits

Velocity Recovery Stacks

PA GE 34

Retrofits

BAC Cooling Tower Service Kit

PA GE 35

P ARTS AND MAI NTE NANCE GUID E 2012 53

Fans and Drives

BAC Gear Systems

PA GE 8

Fans and Drives

Premium Efficient Motors

PA GE 10

Fans and Drives

Gear Couplings,

Composite Drive Shafts

PA GE 9

Fans and Drives

Belts and Powerbands

PA GE 8

Fans and Drives

ENDURADRIVE

Fan

System Retrofit Kit

PA GE 8

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