BAC VTL Manual

OPERATING AND
MAINTENANCE INSTRUCTIONS
1
OM VL_SA 01/11-01
VTL Cooling Towers
VFL Closed Circuit Cooling Towers
VCL Evaporative Condensers
Baltimore Aircoil Company equipment needs to be
properly installed, operated and maintained.
Documentation of the equipment used, including a
drawing, technical data sheet and this manual should be
kept on record. To achieve long, trouble-free and safe
operation, it is necessary to establish an operating plan
including a programme of regular inspection, monitoring
and maintenance. All inspections, maintenance and
monitoring actions should be recorded in a cooling system
logbook. The operating and maintenance instructions
published here can be used as a guide to achieve these
goals.
In addition to establishing the operating plan and the
cooling system logbook it is recommended to conduct a
cooling system risk analysis, preferably by an independent
third party.
For the cooling system, scale, corrosion and biological
control must be established and initiated when the system
is first filled with water and administered on a regular
basis thereafter in accordance with recognized Codes of
Practice. Water sampling, test results and corrective
actions should be recorded in the cooling system logbook.
For more specific recommendations on keeping your
cooling system efficient and safe, contact your local BAC
representative.
Table of Contents Page
Construction Details 2
General Information 3
Water Care 4
Maintenance Procedures 5
Comprehensive Maintenance 10
Further Assistance & Information 11
Recommended Maintenance and
Monitoring Programme 12

2
CONSTRUCTION DETAILS
1. Casing
2. Water Distribution Section
3. High Efficiency Drift Eliminators
4. Fan
5. Fan shaft and bearing
6. Fan motor
7. Wet Deck Surface
8. Strainer
9. Water Make-up Valve
10. Coil
VTL Cooling Towers VFL Closed Circuit Cooling Towers -
VCL Condensers

GENERAL INFORMATION
3
BAC cooling equipment is designed for the operating conditions
specified below, which must not be exceeded during operation.
Wind Load: For safe operation of unshielded equipment exposed to
wind speeds above 120 km/h installed at a height above 30 m from
the ground contact your local BAC-Balticare representative.
Standard electrical motors are suitable for an ambiant temperature
range from -25°C to +40°C.
CLOSED CIRCUIT COOLING TOWERS (VFL)
Design pressure : max. 16 bar
Fluid inlet temperature : max. 82°C
Fluid outlet temperature : min. 10°C
Fluids circulated through the inside of the coils must be compatible
with the coil construction material, ie.
- black steel, for hot dip galvanized coils
- stainless steel AISI 304L or 316L (options)
- galvanized steel for cleanable coil (option)
Maximum spray pressure : 14 kPa (If pump(s) are installed by
others, it is recommended to install a pressure gauge at the inlet of
the water distribution system.
EVAPORATIVE CONDENSERS (VCL)
Design pressure : 16 bar
Refrigerant inlet temperature : max. 120°C
Refrigerant outlet temperature : min. - 20°C
Suitable refrigerants : R-717, Halocarbon Refrigerants, HFC`s.
Standard condenser coils are manufactured from black steel and
hot dip galvanised after fabrication and may contain certain
contaminants, such as carbon, iron oxyde or welding particles. The
interior condition of the coil, including humid air must be
considered, when using halocarbon (or HFC) refrigerants and
sensitive system components, such as electronic expansion devices
or semi hermetic compressors. The installer must take the
necessary precautions on site to safeguard the operation of these
components in conjunction with the condenser coils.
Maximum spray pressure : 14 kPa (If pump(s) are installed by
others, it is recommended to install a pressure gauge at the inlet of
the water distribution system.)
At ambient temperatures above 40°C ensure spray water pump
remains running, even if condenser is idle. This prevents unwanted
discharge of refrigerant through safety valves (by others).
Note: Stand-by pump arrangements for evaporative fluid coolers and
condensers require alternating operation of each pump at least twice per
week to avoid stagnant water conditions and bacteriological growth.
Purge Requirements
The installer of BAC condensers must ensure proper system purging
of air prior to operation. Entrained air can obstruct free drainage of
refrigerant and reduce condensing capacity, resulting in higher
operating pressures than design. To verify absence of non
condensables in the system, follow the instructions of the BAC
Evaporative Condenser Manual E115.
Refrigerant connections on site :
All connections in the external refrigerant pipework (installed by
others) must be leak free and tested accordingly.
COOLING TOWERS (VTL)
Maximum inlet pressure : 0.5 bar
Water inlet temperature : max. 55°C (std. fill) or 65°C (high
temperature option)
For circulating water quality compatible with construction materials
refer to section ‘WATER CARE’ on page 4.
Note: Actual spray pressure is indicated on technical data sheet supplied with
order acknowledgement.
All piping external to BAC cooling equipment must be supported
separately. In case the equipment is installed on vibration rails or
springs, the piping must contain compensators to eliminate
vibrations carried through the external pipework.
All electrical, mechanical and rotating machinery constitute a
potential hazard, particularly for those not familiar with its design,
construction and operation. Accordingly adequate safeguards
(including use of protective enclosures where necessary) should be
taken with this equipment both to safeguard the public (including
minors) from injury and to prevent damage to the equipment, its
associated system and the premises.
If there is doubt about safe and proper rigging, installation,
operation or maintenance procedures, contact the equipment
manufacturer or his representative for advise.
AUTHORIZED PERSONNEL
The operation, maintenance and repair of this equipment should be
undertaken only by personnel authorized and qualified to do so. All
such personnel should be thoroughly familiar with the equipment,
the associated systems and controls and the procedures set forth in
this and other relevant manuals. Proper care, procedures and tools
must be used in handling, lifting, installing, operating and repairing
this equipment to prevent personal injury and/or property damage.
MECHANICAL SAFETY
Depending upon site conditions it also may be necessary to install
items such as bottom air inlet screens, ladders, safety cages,
stairways, access platforms, handrails and toe boards for the safety
and convenience of the authorized service and maintenance
personnel. At no time this equipment should be operated without all
fan screens, access panels and access doors in place.
When the equipment is operated with a variable fan speed control
device, steps must be taken to avoid operating at or near to the
fan’s «critical speed». For more information consult your local BAC
representative.
ELECTRICAL SAFETY
Each fan and pump motor associated with this equipment should be
installed with a lockable disconnect switch located within the sight
of the equipment. No service work should be performed on or near
the fans, motors, drives or inside the equipment unless fan and
pump motors, heaters etc. are electrically isolated.
LOCATION
All cooling equipment should be located as far away as possible
from occupied areas, open windows or air intakes to buildings.
LOCAL REGULATIONS
Installation and operation of cooling equipment may be subject of
local regulations, such as establishment of risk analysis. Ensure
regulatory requirements are consistently met.
Operating Conditions Connecting Pipework
Safety Precautions

4
WATER CARE
In all cooling equipment, operating in evaporative mode, the cooling
is accomplished by evaporating a small portion of the re-circulating
water as it flows through the equipment. When this water
evaporates, the impurities originally present in the water remain.
Unless a small amount of water is drained from the system, known
as blow down, the concentration of dissolved solids will increase
rapidly and lead to scale formation or corrosion or both. Also, since
water is being lost from the system through evaporation and blow
down, this water needs to be replenished.
The total amount of replenishment, known as make-up, is defined
as:
Make-up = evaporation loss + blow down
In addition to the impurities present in the make-up water, any
airborne impurities or biological matter are carried into the
equipment and drawn into the re-circulating water. Over and above
the necessity to blow down a small quantity of water, a water
treatment programme specifically designed to address scale,
corrosion and biological control should be initiated when the system
is first installed and maintained on a continuous base thereafter.
Moreover there must be an ongoing programme of monitoring in
place to ensure the water treatment system is maintaining the
water quality within the control guidelines.
Check and adjustments of blow down depends on the blow down
device actual in use.
To prevent excessive build-up of impurities in the circulating water, a
small amount of water must be « bled » from the system at a rate to
be determined by the water treatment regime. The amount of blow
down is determined by the design cycles of concentration for the
system. These cycles of concentration depend on the quality of the
make-up water and the design guidelines for the quality of the
recirculating water given below.
Cycles of concentration are the ratio of the dissolved solids
concentration in the circulating water compared to the dissolved
solids concentration in the make-up water. The blow down rate can
be calculated as follows :
Blow down = Evaporation loss / Cycles of concentration - 1
The evaporation loss is not only function of the heat load but also
depends on climatic conditions, the type of equipment used and the
method of capacity control, which is applied. The evaporation loss at
summer conditions is approximately 0.431 l/ 1000 kJ heat
rejection. This number should be used for blow down valve sizing
only and not for the calculation of annual water consumption.
Galvanised steel units require passivation in order to prevent white
rust.
Passivation is the formation of a protective, passive, carbonate layer
on galvanised steel surfaces. On newly installed units, to provide
maximum protection from corrosion, one must take special
measures to passivate galvanised steel surfaces.
To ensure proper passivation of the galvanised steel, keep the pH of
the circulating water between 7.0 to 8.2 for four to eight weeks after
start-up, or until new zinc surfaces turn dull grey in colour. If white
deposits forn on galvanised steel surfaces after the pH is returned to
normal service levels, itmay be necessary to repeat the passivation
process.
NOTE: Stainless steel units and units protected by additional coating
do not require passivation.
The growth of algae, slimes and other micro-organisms, if
uncontrolled, will reduce system efficiency and may contribute to
the growth of potentially harmful micro-organisms, such as
Legionella, in the recirculating water system.
Accordingly a treatment programme specifically designed to
address biological control should be initiated when the system is
first filled with water and administered on a regular base thereafter
in accordance with any regulations that may exist or in accordance
with accepted codes of good practice.
It is strongly recommended to monitor the bacteriological
contamination of the recirculating water on a regular base (for
example, TAB test with dip slides on a weekly base) and record all
results.
If a chemical water treatment is used, it must meet the following
requirements:
1. The chemicals must be compatible with the materials of
construction used in the cooling system.
2. Chemicals should be fed into the re-circulated water to avoid
localised high concentrations, which may cause corrosion.
Chemicals are normally fed into the pump discharge line. Batch
feeding of chemicals does not afford adequate control of water
quality and is not recommended.
3. Acid water treatment maybe used on evaporative cooling
equipment as long as the requirements 1 and 2 listed above are
maintained. When chlorine is added to the system, free residual
chlorine should not exceed 1 ppm. Exceeding ths limit may
accelerate corrosion.
It is strongly recommended to check the key parameters of the
circulating water quality on a monthly base. See table: Circulated
Water Quality Guidelines. All test results need to be recorded.
About Water Care
Property of Water Recommended Level
pH 6.5 to 9.0
Hardness (as CaCO3) 30 to 750 ppm
Alkaline (as CaCO3) 500 ppm max.
Total Dissolved Solids 1500 ppm max.
Chlorides 250 ppm max.
Sulfates 250 ppm max.
Conductivity 1800 µS/cm
Silica 150 ppm max.
Table 1: Circulated Water Quality Guidelines
Passivation
Biological Control
Chemical Treatment

MAINTENANCE PROCEDURES
5
COLD WATER BASIN AND BASIN STRAINERS
The cold water basin should be inspected regularly. Any debris
which may have accumulated in the basin or on the strainers should
be removed. Quarterly, or more often if necessary, the entire cold
water basin should be drained, cleaned and flushed with fresh water
to remove the silt and sediment which normally collects in the basin
and under the wet deck surface during operation.
When flushing the basin, the strainers should be left in place to
prevent the sediment from re-entering the unit system. After the
basin has been flushed, the strainers should be removed, cleaned,
and replaced before refilling the basin with fresh water.
!
DO NOT USE ACID TO CLEAN THE STRAINERS
OPERATING LEVEL AND MAKE-UP
Operating height is the water level above sump bottom during
operation.
1. Operating height
2. Overflow
3. Pan Bottom
Operating heights for the evaporative cooling equipment are
indicated in the tables below :
To check the operating level, proceed as follows :
1. Shut off fan(s) but keep pump(s) running.
2. Remove circular access door next to make-up connection.
3. Measure height from sump bottom to water level and compare
with face value from table.
4. Check valve for leakage and replace valve seat, if necessary.
5. Check that float arm can move freely and that float ball floats
and closes valve.
6. Ensure that make-up water supply is adequate.
Note: This procedure does not apply for
- equipment equipped with electrical water level control
- remote sump applications
If a float operated water make-up is used, initial setting and regular
adjustments are needed.
The float controlling the make-up valve is mounted on a threaded
rod, held in place by wing nuts. (see figure below)
1. Float Ball
2. All Threaded Rod
3. Wing Nuts
4. Float Arm Assembly
5. Float Valve
To make the initial setting, adjust the wing nuts so that the valve is
completely closed when the water level in the cold water sump is 13
mm below the overflow level. Under normal load conditions this
setting should produce the correct operating level. At low load
conditions the operating level will raise and need be adjusted.
BLOW DOWN
In case of a continuous blow down with a metering valve in the
bleed line, ensure that the valve is unobstructed and that blow down
water can drain freely. Measure the blow down flow rate by
recording the time needed to fill a given volume.
For automatic blow down using conductivity control, ensure that the
conductivity probe is clean and that the blow down solenoid valve is
operational. Unless you have a specific adjustment procedure, your
water treatment company should check and adjust set points.
SUMP HEATER PACKAGE
Sump heaters must only operate in the winter to prevent the sump
water from freezing, when the water pump(s) and the fan(s) are shut
off. Under no circumstances should sump heaters operate at other
times as they could potentially heat the water to temperature levels,
which are favourable to bacteriological growth. Ensure every six
months the heater thermostat is properly set and clean. Also ensure
that control and safety devices, such as low level cut out switches,
are operational, clean and properly incorporated into the control
circuit.
BELT TENSIONING
Belt tensioning can be adjusted by changing the position of the fan
motor(s) by rotating the motor base adjustment screw, which
extends through the bottom frame angel. Check belt tension as
follows :
1. Shut off fan(s) .
2. Rotate the fan sheave half a turn to evenly distribute the tension
in the belt before measuring.
3. Check belt tension
Checks and Adjustments
Model
Operating Height
(measured from pan bottom)
(mm)
VTL 140
VCL 140
VFL 140
Table 2: Operating Heights
Figure 1: Operating Water Level
Figure 2: Water Make-up Valve Assembly

6
MAINTENANCE PROCEDURES
1. Fan Sheave
2. Belt
3. Motor Sheave
4. Deflection
5. Straight Edge
New belts have to be re-tensioned after 24 hours operation.
If Belt tensioning is required, please proceed as follows:
1. Loosen the lock nuts on the Motor Base Adjusting Screws.
2. Turn the Motor Base Adjusting Screws clockwise to tension the
belt, or counter-clockwise to relieve belt tension. During
adjustment of belt tension the drives should be rotated several
times by hand to evenly distribute the tension throughout the
belt.
3. When the belt is properly tensioned, retighten the locking nuts
on the Motor Base Adjusting Screws.
Note: There should be no “chirp” or “squeal” when the fan motor is started.
DRIVE ALIGNMENT
Proper drive alignment ensures maximum belt life. Alignment is
checked for standard drives after correct belt tensioning by placing
a straightedge across both sheaves as shown in the Figure below.
When the drives are properly aligned the gap measured between
straightedge and sheave does not exceed 0,5 mm per 100 mm of
fan sheave diameter.
1. Motor Sheave
2. Fan Sheave
3. Points of Contact
LOCKING COLLAR
The excentric locking collar of the bearing at the drive end ensures
that the inner bearing race is secured to the fan shaft. Locking
collars can be set using the following procedure. (See Figure below)
1. Stop fan(s) and remove side access panel(s).
2. Loosen the set screw.
3. Using a drift pin centerpunch, tap the collar (in the hole provided)
tangentially in the direction of rotation while holding the shaft.
4. Retighten the screw.
5. Install access panel(s) and start fan(s).
1. Direction of Rotation
2. Drift Pin: Tap the locking collar in direction of fan rotation until cam is
locked.
3. Tighten set screw.
ROTATION OF FAN(S) AND PUMP(S)
Fans must rotate without obstruction and both fans and pumps
must rotate in the correct direction, which is indicated by arrows on
the equipment. Check proper functioning as follows:
1. Stop fan(s) and pump(s).
2. Turn the fan by hand to ensure rotation without obstruction.
Remove obstruction, if present.
3. Start the pump(s) and check for the proper rotation as indicated
by the arrow on the pump cover. If rotation is wrong, stop pump
and correct electrical wiring.
4. Start the fan(s) and check for proper rotation as indicated by the
arrow on the fan housing. If rotation is wrong stop fan(s) and
correct fan motor wiring.
MOTOR VOLTAGE AND CURRENT
Check the voltage and the current of all three legs of the fan and
pump motors. The current should not exceed the nameplate rating.
After prolonged shutdown the motor insulation should be checked
with a megger insulation tester prior to restarting.
UNUSUAL NOISE AND VIBRATIONS
Unusual noise and/or vibration are the result of malfunctioning of
mechanical components or operational problems. If this occurs, a
thoroughful inspection of the entire unit followed by immediate
corrective action is needed. If required, consult your local BAC
Balticare representative for assistance.
GENERAL CONDITION OF THE EQUIPMENT
The inspection should focus on following areas:
- damage of corrosion protection
- signs of scale formation or corrosion
- accumulation of dirt and debris
- presence of biofilms
Smaller damages of the corrosion protection can be repaired.
Gavanised steel components should be inspected for blemishes and
corrosion. Affected areas can be wire brushed and recoated with a
cold galvanising compound such as zinc rich compound.
If there is evidence of scale formation (more than 0,1 mm) or
corrosion, water treatment regime must be checked and adjusted
by the supplier.
Any dirt and debris need be removed following the CLEANING
PROCEDURES described in this manual (See page 9<).
Figure 3: Fan Belt Check and Adjustment
Figure 4: Checking sheave alignment
Inspections and Corrective Actions
Figure 5: Locking Collar Assembly

MAINTENANCE PROCEDURES
7
If there is evidence of biofilms the system, including piping should
be drained, flushed and cleaned of slimes and other organic
contamination. Refill system with water and apply biocide shock
treatment. Check pH value and functionality of ongoing biocide
treatment.
HEAT TRANSFER SECTION
The inspection procedure is as follows:
1. Shut off fan(s) and pump(s).
2. Remove the eliminators and access doors.
3. Inspect the coil/wet deck surface for
-obstructions
- damages
- corrosion
-fouling
4. After inspection, install eliminators and access doors and start
pump(s) and fan(s).
Remove any obstructions from heat transfer section(s).
Any damages or corroded areas need to be repaired. Call your local
BAC Balticare representative for assistance.
Minor fouling can usually be removed chemically or by temporary
changes to the water treatment programme. Contact your water
treatment supplier for advice. Major fouling requires cleaning and
flushing according to the CLEANING PROCEDURES (See page 9).
Regular checking of the total aerobic bacteria count (TAB) and
maintaining it within acceptable levels are the key to prevent
fouling.
DRIFT ELIMINATORS
The inspection procedure is as follows :
1. With fan(s) and pump(s) running visually check for areas with
excessive drift loss.
2. Shut off fan(s) and pump(s) and visually check eliminators for
-obstructions
- damages
- cleanliness
-properfit
3. If any of the above problems have been observed, stop fan(s)
and pump(s) and remove eliminators.
4. Clean eliminators from debris and foreign matter. Remove dirt
and obstructions. Replace damaged or ineffective eliminators.
5. Install eliminators and ensure they fit tightly with no gaps.
!
DO NOT STEP ON ELIMINATORS.
WATER DISTRIBUTION
The inspection procedure is as follows :
1. Shut off the fan(s), but leave the pump(s) running.
2. Check and adjust spray pressure, if required.
(not applicable for coil models with standard pumps)
3. Remove the eliminators.
4. Check to see if the nozzles are producing the spray pattern
shown in figures below
5. Clean water distribution from dirt and debris. Ensure spray
branches and nozzles are in place and clean. Replace damaged
or missing nozzles.
6. Install eliminators and ensure they fit tightly with no gaps.
7. Start fan(s) and pump(s).
FAN SHAFT
The exposed areas of the fan shaft are coated with a soft seal for
added corrosion protection. It is recommended that the coating be
inspected for continuity quarterly or at least every 6 months. Any
signs of surface corrosion must be treated. This involves:
1. Removal of the protective coating with a suitable cleaning
medium
2. The removal of any surface corrosion with emery cloth
3. The re-coating of the shaft with soft seal.
FAN MOTOR
During operation it is required to clean the outside surface of the
motor at least every 6 months (or more often depending on site
conditions) to ensure proper motor cooling. Do not wash down the
motor unless it is IP 66 rated. On a quarterly or six monthly basis
check:
- Electric connections
- Motor protection devices
-Checkampdraw
- Motor bearings for noise/overheating
- Motor holding bolts
- External surface of motor for corrosion
ELECTRIC WATER LEVEL CONTROL PACKAGE (OPTION)
The electric water level control package (optional) maintains a
constant water level in the cold water sump independent of cooling
load changes and water supply pressure variations. Ensure every six
months that all components (valve, float switches) are operational
and clean.
FAN SHAFT BEARINGS
The fan shaft is supported by ball bearings (see Figure below).
Lubrication
Figure 6: Nozzle Spray Distribution Type Cooling Tower
Figure 7: Nozzle Spray Distribution Type Closed Circuit Cooling Tower or
Condensor

8
MAINTENANCE PROCEDURES
Under normal operating conditions the bearings should be greased
every 2000 operating hours or at least every six months. The
bearings should be lubricated with one of the following water
resistant inhibited greases, which are good for ambient
temperature ranging from - 55°C to 120 °C.
1. Lube Fitting
2. Locking Collar
The bearings should be lubricated only with a hand grease gun. Do
not use high-pressure grease guns, since they may rupture the
bearing seals. When lubricating, purge the old grease from the
bearing by gradually adding grease until a bead of new grease
appears at the seal. In particular when extended lubrication lines
are fitted ensure that ALL old grease is removed and that new
grease is leaving the seal.
The bearings should be lubricated only with a hand grease gun. Do
not use high-pressure grease guns, since they may rupture the
bearing seals. When lubricating, purge the old grease from the
bearing by gradually adding grease until a bead of new grease
appears at the seal.
ADJUSTABLE MOTOR BASE
The motor base adjusting screw (see figure below) should be coated
every six months using a good quality corrosion inhibiting grease,
such as one of those recommended for lubricating the fan shaft
bearings.
1. Motor Base Slide
2. Adjustment Rod
3. Lock Nut
4. Adjusting Nut
Figure 8: Ball Bearing
Figure 9: Adjustable Motor Base

MAINTENANCE PROCEDURES
9
MECHANICAL CLEANING
Keeping your evaporative cooling equipment (and the associated
system) clean will maintain its efficiency and help to prevent
uncontrolled bacteriological growth. The recommended cleaning
procedures are described below :
1. Disconnect fan and pump motor(s) and shut off make-up supply.
2. Remove screens, eliminators, access panels and doors and
drain system. Do not remove sump strainer.
3. Clean debris from exterior and fan(s) with soft brush, if
necessary use water and soap.
4. Clean interior with (soap) water and soft brush, if necessary use
high pressure water jet.
5. Remove any debris from water distribution system and clean any
nozzles if clogged. If necessary nozzle and grommet may be
removed for cleaning.
6. Remove debris from heat transfer section (coil/fill) . Do not use
steam or high pressure water to clean cooling tower wet deck
surface.
7. Flush with clean water and drain to remove accumulated dirt.
8. Remove, clean and replace sump strainer(s).
9. Clean debris from screens and eliminators with water jet and
install.
10.Remove debris from access doors and panels with soft brush
and (soap) water and install.
11.Close drain and open make-up supply. Fill system to overflow
level with clean water.
DISINFECTION
Disinfection of your cooling system may be needed in case of high
concentration of aerobic bacteria and/or Legionella. Disinfection is
also recommended for evaporative cooling systems with known or
suspected high bacteriological levels, prior to a cleaning procedure.
Some local or national guidance also recommends disinfection
prior to initial start up, after a prolonged shut down, after routine
cleaning operations or when significant alterations have been made
to the cooling system.
Disinfection must be carried out in accordance with a proper
procedure and take into account the safety of the cleaning and
disinfection staff.
Typically disinfection is achieved using a sodium hyperchloride
solution to maintain a residual value of 5 - 15 mg/l of free chlorine
and circulate this around the system for up to 6 hours. Higher
chlorine levels for a shorter period are possible, but require a higher
level of corrosion protection than galvanized steel only. Consult your
BAC Balticare representative for further information.
Excessive levels of chlorine must be avoided as this quickly can lead
to corrosion and damage to your system.
Chlorinated water should be de-chlorinated before draining and
after disinfection the system must be thoroughly flushed through
with clean water.
Note: A proper regularly monitored biocide programme reduces the need for
cleaning and disinfection actions significantly.
Cleaning Procedures

10
COMPREHENSIVE MAINTENANCE
In order to ensure maximum efficiency and minimum downtime of
your evaporative cooling system, it is recommended to establish
and execute a programme of preventive maintenance. Your local
BAC Balticare representative will assist you in establishing and
implementing such programme. The preventive maintenance
programme must not only avoid that excessive downtime occurs
under unforeseen and unwanted conditions, but must also ensure
that factory authorized replacement parts are used, which are
designed to fit and for their purpose carry the full factory warranty.
Factory authorized replacement parts are available normally within
four days after receipt of an order. In emergency cases shipment
can be usually made within 24 hours. To order factory authorized
parts, contact your local BAC representative. Be sure you include the
unit serial number when ordering any parts.
To facilitate servicing of the equipment, it is suggested that the
following parts be carried on hand:
- Make-up float ball (if applicable)
- Valve seal for water make-up valve
- Fan shaft bearings
- Spray nozzles and grommets
- Spray distribution branch grommets
-Setofbelts
Insist on factory authorised parts to avoid loss of efficiency or an
operational risk, which may occur when non authorised parts are
used.
About Comprehensive Maintenance

FURTHER ASSISTANCE & INFORMATION
11
BAC has established a specialized independent total care company
called Balticare . The BAC Balticare offering involves all elements
required to ensure a safe and efficient operation of your evaporative
cooling products. From a full range of risk assessment to selective
water treatment, training, testing, record keeping and annual
system overview. Contact your local BAC representative for further
information and specific assistance.
INTERESTING WEB SITES
www.BaltimoreAircoil.com;
Balticare
More Information

12
RECOMMENDED MAINTENANCE AND MONITORING PROGRAMME
* only for motors with grease fittings
** depends on applied code of practice
Notes:
1. Water Treatment and auxiliary equipment integrated in the cooling system may require additions to the table above. Contact suppliers for
recommended actions and their required frequency.
2. Recommended service intervals are for typical installations. Different environmental conditions may dictate more frequent servicing.
3. For units with Belt Drive, tension on new belts must be readjusted after the first 24 hours of operation and monthly thereafter.
Schedule
Type of Action Action Start-Up Weekly Monthly Quarterly Every Six
Months Annually Shutdown
Checks and Adjust-
ments
Cold Water Basin and Strainers X X
Operating level and make-up X X
Blow down X X
Sump heater package X X
Belt tension X X
Drive alignment X X
Locking Collar X X
Rotation of fan(s) and pump(s) X
Motor voltage and current X X
Unusual noise and/or vibration X X
Inspections and
Monitoring
General condition X X
Heat transfer section X X
Finned discharge coil (optional) X X
Drift eliminators X X
Water distribution X X
Fan Shaft X X
Fan Motor X X
Electric Water Level Control Package (optional) X X
TAB test (dip slides) X X
Circulating water quality X X
System overview X X
Record keeping as per event
Lubrication Fan shaft bearings X X
Motor bearings * X X
Adjustable motor base X X
Cleaning
procedures
Mechanical cleaning X X
Disinfection ** (X) (X) (X)
Table 3: Recommended Maintenance & Monitoring Schedule

NOTES
13

14
NOTES

NOTES
15

RECOMMENDED MAINTENANCE AND MONITORING PROGRAMME
www.BaltimoreAircoil.com
[email protected]
Baltimore Aircoil Comapy SA
(Pty) Ltd
Portland Road, Phillipi,
Cape Town, South Africa
©Baltimore Aircoil Company SA (Pty) Ltd.
Model: ........................................................................................... Serial number: .................................................................................