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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
- proper  fit

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
- Check  amp  draw
- 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

Summary of Contents for VCL

Page 1: ...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 a...

Page 2: ...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 ...

Page 3: ...G 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 I...

Page 4: ...on 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 w...

Page 5: ...loat 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 dow...

Page 6: ...mps 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 S...

Page 7: ...cedure 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 o...

Page 8: ... 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 bea...

Page 9: ...er 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 afte...

Page 10: ... 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 f...

Page 11: ...quired 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 ...

Page 12: ... 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 d...

Page 13: ...NOTES 13 ...

Page 14: ...14 NOTES ...

Page 15: ...NOTES 15 ...

Page 16: ...ANCE AND MONITORING PROGRAMME www BaltimoreAircoil com info BaltimoreAircoil co za Baltimore Aircoil Comapy SA Pty Ltd Portland Road Phillipi Cape Town South Africa Baltimore Aircoil Company SA Pty Ltd Model Serial number ...

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