Baltimore Aircoil Company VT1 Operating And Maintenance Instructions Manual
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Summary of Contents for Baltimore Aircoil Company VT1
- Page 1 MVTv09EN VT0 Open Cooling Towers VT1 Open Cooling Tower OPERATING AND MAINTENANCE INSTRUCTIONS...
- Page 2 Recommended maintenance and monitoring programme 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.
- Page 3 Lubrication Start-Up Weekly Monthly Quarterly Every 6 Annually Shutdown months Fan shaft bearings Motor bearings* Adjustable motor base Hinges & access door bolts * only for motors with grease fittings with typical frame size > 200L (>30 KW) Cleaning procedures Start-Up Weekly Monthly...
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Page 4: Table Of Contents
Table of contents OPERATING AND MAINTENANCE INSTRUCTIONS Construction Details General information Operating conditions Connecting pipework Safety precautions Disposal requirements Non-walking surfaces Modifications by others Warranty Water Care About water care Biological control Chemical treatment Passivation Overflow connection Cold Weather Operations About cold weather operation Protection against sump water freezing Capacity control... -
Page 5: Construction Details
CONSTRUCTION DETAILS 1. Spray header 11. Air inlet vanes (not shown) 2. High efficiency drift eliminators 12. Fan shaft & bearings 3. Water inlet connection 13. Motor base adjusting screw 4. Casing 14. Fan motor & Drive 5. Wet deck surface 15. -
Page 6: General Information
GENERAL INFORMATION Operating conditions 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 representative. •... - Page 7 CAUTION Do not cover units with PVC eliminators or fill with a plastic tarpaulin. Temperature increase due to sun radiation could deform the fill or eliminators. AUTHORIZED PERSONNEL The operation, maintenance and repair of this equipment should be undertaken only by personnel authorized and qualified to do so.
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Page 8: Disposal Requirements
LOCAL REGULATIONS Installation and operation of cooling equipment may be subject to local regulations, such as establishment of risk analysis. Ensure regulatory requirements are consistently met. Disposal requirements Dismantling of the unit and treatment of refrigerants (if applicable), oil and other parts must be done with respect to the environment whilst protecting workers from potential risks related to exposure to harmful substances. -
Page 9: Water Care
WATER CARE About 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. - Page 10 ® Baltibond Hybrid Coating and SST304L 6.5 to 9.2 Total hardness (as CaCO 50 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max. Total dissolved solids 2050 mg/l max. Conductivity 3300 µS/cm Chlorides 300 mg/l max. Sulfates* 350 mg/l max.* Total suspended solids 25 mg/l max.
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Page 11: Biological Control
SST316L 6.5 to 9.5 Total hardness (as CaCO 0 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max. Total dissolved solids 2500 mg/l max. Conductivity 4000 µS/cm Chlorides 750 mg/l max. Sulfates* 750 mg/l max.* Total suspended solids 25 mg/l max. Chlorination (as free chlorine/halogen): continuous 2 mg/l max. -
Page 12: Chemical Treatment
Certain products used for water treatment, particular some dispersant and bio-dispersant additives, might change the properties of the water (such as the surface tension), which can cause excessive drift loss (water passing through the eliminators). In such case we recommend to review the water treatment (product type, dosage) with your water treatment expert. -
Page 13: Cold Weather Operations
COLD WEATHER OPERATIONS About cold weather operation BAC cooling equipment can be operated in sub freezing ambient conditions provided the proper measures are taken. Listed below are general guidelines which should be followed to minimize the possibility of freeze-up. As these guidelines may not include all aspects of the anticipated operation scheme, system designer and operator must thoroughly review the system, location of the equipment, controls and accessories to ensure reliable operation at all times. - Page 14 When operating with VFD drives above nominal frequency be aware of the potential risk for motor overload or mechanical damages. It is recommended to provide sinus filters on the VFD to prevent bearing damage on fan motors. CAUTION Refer to fan motor nameplate data when programming a VFD. The purpose of a low level cut out switch for pump protection is to protect the pump from running dry in case of make-up failure or extreme water loss.
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Page 15: Maintenance Procedure
MAINTENANCE PROCEDURE Checks and adjustments 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 during operation. - Page 16 Operating heights for the evaporative cooling equipment are indicated in the tables below: Model Operating height (measured from pan bottom) (mm) VT0-0312-xxx VT0-0412-xxx VT1-74xx-xxx VT1-08xx-xxx VT1-10xx-xxx VT1-12xx-xxx Operating heights The "x" represents the variable numbers or characters in the model numbers.
- Page 17 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, if necessary. 5. Check that float arm can move freely and that float ball floats and closes valve. 6.
- Page 18 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.
- Page 19 1. Fan sheave 2. Belt 3. Motor sheave 4. 10 mm/m deflection = proper belt tension 5. Straight edge CAUTION Over-tensioning of belts can lead to component damage. Deflection force (kg) Diameter (mm) Belt profile motor sheave Min. Max. 80 through 125 135 through 200 >200 100 through 125...
- Page 20 DRIVE ALIGNMENT Proper drive alignment ensures maximum belt life. Alignment is checked for standard drives after correct belt tensioning by placing a straight-edge across both sheaves as shown in the Figure below. When the drives are properly aligned the gap measured between straight-edge and sheave does not exceed 0,5 mm per 100 mm of fan sheave diameter.
- Page 21 VT0-0312-01 4 mm VT0-0312-02 4 mm VT0-0312-03 4 mm VT0-0412-01 29.4 15.6 3/16" VT0-0412-02 29.4 15.6 3/16" VT0-0412-03 29.4 15.6 3/16" VT1-0812-01 29.4 19.6 3/16" VT1-0812-02 29.4 19.6 3/16" VT1-0812-03 29.4 19.6 3/16" VT1-0818-01 29.4 19.6 3/16" VT1-0818-02 29.4 19.6 3/16"...
- Page 22 In case of fan cycling, used as a method of capacity control, care needs to be taken when there are 2 fan motors for one single upper section; both motors are operated or stopped simultaneously. This is the case for the following models: VT1-1018-xxx, VT1-1218-xxx. On all other models, fans can be switched on or off individually.
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Page 23: Inspections And Corrective Actions
UNUSUAL NOISE AND VIBRATIONS Unusual noise and/or vibration are the result of malfunctioning of mechanical components or operational problems (e.g. unwanted ice formation). If this occurs, a thorough inspection of the entire unit followed by immediate corrective action is needed. If required, consult your local BAC representative for assistance. Inspections and corrective actions GENERAL CONDITION OF THE EQUIPMENT The inspection should focus on following areas:... - Page 24 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. CAUTION Do not step on eliminators.
- Page 25 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.
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Page 26: Lubrication
Lubrication FAN SHAFT BEARINGS The fan shaft is supported by ball bearings (see figure below). 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 (or an equivalent), which are good for ambient temperature ranging from -20°C to 120°C or an equivalent. -
Page 27: Cleaning Procedures
GREASE PRODUCTS Shell Alvania grease RL3 -20°C to +120°C Texaco Multifak Premium 3 -30°C to +140°C Klüber Isoflex LDS Special A -50°C to +120°C Mobil Mobilith SHC 100 -40°C to +175°C Total Fina Elf Multis 3 -20°C to +120°C Grease products 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. - Page 28 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.
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Page 29: Comprehensive Maintenance
COMPREHENSIVE MAINTENANCE About 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 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, it also ensures that factory authorized replacement parts are used, which are designed to fit and for their purpose carry the full factory warranty. -
Page 30: Further Assistance & Information
FURTHER ASSISTANCE & INFORMATION Assistance BAC has established a specialized 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. For more details, contact your local BAC representative for further information and specific assistance at www.BaltimoreAircoil.eu More information REFERENCE LITERATURE... - Page 31 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 32 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 33 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 34 COOLING TOWERS CLOSED CIRCUIT COOLING TOWERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS, EQUIPMENTS & SERVICES www.BaltimoreAircoil.eu info@BaltimoreAircoil.eu Please refer to our website for local contact details. Industriepark - Zone A, B-2220 Heist-op-den-Berg, Belgium © Baltimore Aircoil International nv...