VTL Open Cooling Towers... B98. Benefits... B100. Construction Details... B102. Custom Features and Options... B103. Accessories...

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1 . - B 97 Product Detail... B98 Benefits... B100 Construction Details... B102 Custom Features and Options... B103 Accessories... B Engineering Data... B107 Structural Support... B111 Engineering Specifications... B112

2 - B 98 Capacity Single Cell Capacity: 4 90 l/s General Description Open Circuit Cooling Towers with centrifugal fans, deliver fully rated thermal performance over a wide range of flow and temperature requirements. This type of cooling towers can be installed indoors and can accommodate limited ceiling or enclosure heights. Cooling tower with centrifugal fans minimise sound levels and installation costs, provides year round operating reliability, and simplifies maintenance requirements. Cooling Towers provide an answer to the growing need to save water and energy and help protect the environment by providing the highest system efficiency. Key Features Suitable for indoor and outdoor installations Suitable for high temperature applications Low sound Single side air inlet Low energy consumption Low installed cost Easy maintenance Reliable year-round operation Long service life Suitable for locations with limited ceiling or enclosure heights and roof top installations Baltimore Aircoil

3 - B because temperature matters

4 - B 100 Benefits Installation and Application Flexibility Indoor Installations Centrifugal fans can overcome the static pressure imposed by external ductwork, allowing this type of cooling towers to be installed indoors. High Temperature Applications A range of wet deck and construction options are available to accommodate entering water temperatures of up to 65 C. Low Profile Models Motors and drive of low profile units are adjacent to the casing section to yield models suitable for use in height sensitive installations. Low profile unit shown in contrast to a standard unit Low Sound Centrifugal Fan - Centrifugal fans have inherently low sound characteristics. Single Side Air Inlet - Particularly sound-sensitive areas can be accommodated by facing the quiet side (back panel) to the sound-sensitive direction. Low Energy Consumption Evaporative Cooling Equipment minimizes the energy consumption of the entire system because it provides lower operating temperatures. The owner saves money while conserving natural resources and reducing environmental impact. Low Installed Cost Support All models mount directly on two parallel I-beams (supplied by others) and ship complete with motors and drives factoryinstalled and aligned. Modular Design All models without intake or discharge accessories ship in one piece to minimize field installation time and lifting time. Easy Maintenance Internal Access - The interior of the unit is easily accessible for adjusting the float valve, cleaning the strainer or flushing the basin. Modular Design Reliable Year-Round Operation V-Belt Drive The fans, motor, and drive system are located outside of the moist discharge airstream, protecting them from moisture, condensation and icing hence allowing a safe yearround operation. Baltimore Aircoil

5 - B 101 The water level control is easily reached from the access door Long Service Life V-Belt Drive System for Series VL-units Materials of Construction Various materials are available to meet the corrosion resistance, unit operating life, and budgetary requirements of any project (See section "Technical Resources, Materials of Construction" for more details)... because temperature matters

6 . - B 102 Construction Details 1. Heavy-Duty Construction Z600 hot-dip galvanized steel panels 2. Fan Drive System V-belt drive Heavy-duty bearings and fan motor 3. Low sound Centrifugal Fan(s) Quiet Operation 4. Water Distribution System Plastic spray header and branches Large orifice, non-clog nozzles Grommetted for easy maintenance 5. BACount Wet Deck Surface Plastic material Impervious to rot, decay and biological attack Self extinguishing High temperature wet deck option 6. Strainer Anti-vortexing design to prevent air entrainment 7. Access Door Circular access door 8. Drift Eliminators UV resistant non-corrosive material, impervious to rot, decay and biological attack Three distinct changes in air direction to reduce drift loss significantly Assembled in easy to handle sections, which can be removed for access to the equipment interior Baltimore Aircoil

7 - B 103 Custom Features and Options Construction Options Standard Construction: Steel panels and structural elements are constructed of Z600 heavy-gauge hot-dip galvanized steel protected with the Baltiplus Corrosion Protection on the outside of the unit. Optional BALTIBOND Corrosion Protection System: The BALTIBOND Corrosion Protection System, a hybrid polymer coating used to extend equipment life, is applied before assembly to all hot-dip galvanized steel components of the unit. Optional Stainless Steel Construction: Steel panels and structural elements are constructed of stainless steel either type 304 or 316. Optional Water-Contact Stainless Steel Cold Water Basin: A cost-effective alternative to an all stainless steel unit. The critical components in the cold water basin and the cold water basin itself are provided in stainless steel. The remaining components are protected with the BALTIBOND Corrosion Protection System. Note: See section Technical Resources, Material Options for more details on the materials described above. Fan Drive System The fan drive system provides the cooling air necessary to reject heat from the system to the atmosphere. Centrifugal fans, forwardly curved, are driven by matched V-belts with taper lock sheaves. Baltiguard Drive System The BALTIGUARD Drive System consists of two standard single-speed fan motors and drive assemblies. One drive assembly is sized for full speed and load, and the other is sized for approximately 2/3 speed and consumes only 1/3 of the design kilowatt power. This configuration allows the system to be operated like a two-speed motor, but with the reserve capacity of a standby motor in the event of failure. As a minimum, approximately 70% capacity will be available from the low kilowatt motor, even on a design wet-bulb day. Controls and wiring are the same, as those required for a two-speed, two-winding motor. Significant energy savings are achieved when operating at low speed during periods of reduced load and/or low wet-bulb temperatures. Baltiguard Drive System Unit with Sound Attenuation... because temperature matters

8 - B 104 Low Sound Operation The low sound levels generated by BAC Products with centrifugal fans make them suitable for most installations. For situations when one direction is particularly sound sensitive, the unit can be oriented so that the side opposite the air inlet faces the sound-sensitive direction. Units with centrifugal fans are also available with factory designed, tested and rated sound attenuation for both the air inlet and discharge. Remote Sump Execution The use of an auxiliary sump within a heated space is the most satisfactory way to protect sump water from freezing. When the circulating pump is shut off, all the water in the water distribution, in suspension and in the sump will drain freely to the auxiliary sump. Note: For detailed information on the calculation of the remote sump tank, please refer to the section "Technical Resources, Selection of Remote Sump Tank". Baltimore Aircoil

9 - B Accessories Basin Heaters Units exposed to below freezing ambient temperatures require protection to prevent freezing of the water in the cold water basin when the unit is idle. Factory-installed heaters, which maintain the water temperature at 4 C, are a simple and inexpensive way of providing such protection. The heater package includes the heaters, a thermostat and a low level cut out switch to protect the heaters if the water level is too low. Standard electric heaters are selected for -18 C ambient temperature. Model No. Electric Water Level Control Package The electric water level control replaces the standard mechanical make-up valve when a more precise water level control is required. This package consists of a float switch mounted in the basin and a solenoid activated valve in the makeup water line. The valve is slow closing to minimize water hammer. Heaters -18 C (kw) x x x x x x x x x x x 5 Extended Lubrication Lines Extended lubrication lines with grease fittings are available for lubrication of the fan shaft bearings. High Temperature Wet Deck If operation above 55 C is anticipated, an optional high temperature wet deck material is available which increases the maximum allowable entering water temperature to 65 C. Capacity Control Dampers Electric Water Level Control Package Modulating capacity control dampers are available to provide better leaving water temperature control than can be obtained from fan cycling alone. Fan discharge dampers consist of a single airfoil type damper blade located in the discharge of each fan housing. A standard electrical control package for dampers is available from BAC.... because temperature matters

10 - B 106 Basin Sweeper Piping Basin sweeper piping provides an effective method of preventing sediment from collecting in the cold water basin of the unit. A complete piping system, including nozzles, is provided in the unit basin for connection to side stream filtration equipment (Refer to section "Technical Resources, Filtration"). Solid Bottom Panels Factory-installed bottom panels are required when intake air is ducted to the unit. Discharge Hoods Basin Sweeper Piping Discharge hoods reduce the risk of re-circulation in tight enclosures by increasing discharge air velocity, and can be used to elevate the unit discharge above adjacent walls to comply with layout guidelines. Baltimore Aircoil

11 - B 107 Engineering Data REMARK: Do not use for construction. Refer to factory certified dimensions & weights. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. In the interest of product improvement, specifications, weights and dimensions are subject to change without notice. Up-to-date engineering data and more can be found at G M 1. Water Inlet; 2. Water Outlet; 3. Access Door; 4. Make up ND; 5. Overflow ND; 6. Drain ND; 7. Fan Motor. Overflow connection is 80 mm on models 086-L, -094-M and 103-K through 137-M. Model 039-G 045-H 052-H 059-H 059-J 066-J 072-K 076-J 079-K Operating Weight (kg) Shipping Weight (kg) Heaviest Section (kg) Air Flow (m³/s) 7,0 8,0 7,7 7,3 8,6 8,1 8,8 9,7 8,3 Fan Motor (kw) (1) 2,2 (1) 4,0 (1) 4,0 (1) 4,0 (1) 5,5 (1) 5,5 (1) 7,5 (1) 5,5 (1) 7,5 Fluid Inlet ND Fluid Outlet ND Make Up ND A H L L W K 086-L 094-M 095-K 103-K 116-L 126-L 126-M 137-M ,6 14,0 15,4 10,0 11,8 13,3 12,8 14,5 13,6 (1) 7,5 (1) 11,0 (1) 15,0 (1) 7,5 (1) 7,5 (1) 11,0 (1) 11,0 (1) 15,0 (1) 15, because temperature matters

12 - B L P 1. Water Inlet; 2. Water Outlet; 3. Access Door; 4. Make up ND ; 5. Overflow ND 80; 6. Drain ND ; 7. Fan Motor. Model Operating Weight (kg) Shipping Weight (kg) Heaviest Section (kg) Air Flow (m³/s) Fan Motor (kw) Fluid Inlet ND Fluid Outlet ND Make Up ND A H L 1 L 2 W 139-L 152-M 171-L 185-M 198-N 209-O 215-N 2-O 227-O 238-N 245-P 272-P ,9 21,6 18,8 20,4 21,8 23,0 20,8,5 22,0 23,4 27,8 26,8 (1) 11,0 (1) 15,0 (1) 11,0 (1) 15,0 (1) 18,5 (1) 22,0 (1) 18,5 (1) 22,0 (1) 22,0 (1) 18,5 (1) 30,0 (1) 30, General Notes 1. All connections 1 mm and smaller are MPT. Connections 200 mm and larger are bevelled-for-welding. 2. Fan kw is at 0 Pa ESP. To operate against external static pressure up to 1 Pa, consult your local BAC Balticare Representative for size and location. 4. Unit height is indicative, for precise value refer to certified print. 5. Shipping/operating weights indicated are for units without accessories such as sound attenuators, discharge hoods, etc. Consult factory certified prints to obtain weight additions and the heaviest section to be lifted. 3. Make up, overflow, suction, drain connections and access door can be provided on side opposite to that shown; consult your BAC representative. Baltimore Aircoil

13 - B 109 Sound Attenuation HS Horizontal Intake Sound Attenuation 1.Discharge attenuator, 2. Access Door, 3. Intake Attenuator; H & W: unit height and width (see engineering data). HD Horizontal Intake Sound Attenuation 1.Discharge attenuator, 2. Access Door, 3. Intake Attenuator; H & W: unit height and width (see engineering data).... because temperature matters

14 - B 110 VS Vertical Intake Sound Attenuation 1.Discharge attenuator, 2. Access Door, 3. Intake Attenuator, 4. Plenum; H & W: unit height and width (see engineering data). Model No Dimensions Weight (kg) L2 L1 Intake Attenuator Discharge Attenuator Total HS HD VS HS,HD,VS HS HD VS HS HD VS HS HD VS 039 G K J K L M L O O P Note: All VL-units + HS or VS attenuators ship in 2 pieces. All VL-units + HD attenuators ship in 3 pieces. Remote Sump Data Refer to the "Technical Resources" section "Selection of Remote Sump" for Remote Sump Data. Baltimore Aircoil

15 - B 111 Structural Support REMARK: Do not use for construction. Refer to factory certified dimensions & weights. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. In the interest of product improvement, specifications, weights and dimensions are subject to change without notice. Up-to-date engineering data and more can be found at The recommended support arrangement for units consists of parallel I-beams running the full length of the unit, spaced as shown in the following drawing. Besides providing adequate support, the steel also serves to raise the unit above any solid foundation to ensure access to the bottom of the unit. To support units in an alternate steel support arrangement, consult your BAC Balticare Representative. Units with and without Sound Attenuation Cooling Tower Model No. 039-G - 072K 079-K 076-J 082-K 095-K 086-L & 094-M 103-K M 139-L N 227-O 2-O 238-N P A B Maximum Allowable Beam Deflection Outline of Unit, 2. Support Beams, 3. Fan Side, 4. Mounting Holes. Notes: 1. The recommended support arrangement for VL units consists of two parallel I-beams extending the full length of the unit. Supports and anchor bolts are to be designed and furnished by others. 2. All supporting beams are to be flush and level at top and must be oriented relative to gage line as shown. 3. Recommended design loads for each unit support beam should be 70% of the total unit operating weight applied as a uniform load to each of the unit beams. Beams should be designed in accordance with standard structural practice. For the maximum allowable deflection of beams under the unit refer to above table. 4. All mounting holes have a diameter of 22 mm at the locations shown. 5. If vibration isolators are used, a rail or channel must be provided between the unit and the isolators to provide continuous unit support. Additionally the support beams must be designed to accommodate the overall length and mounting hole location of the isolators that may differ from those of the unit. Refer to vibration isolator drawings for these data.... because temperature matters

16 - B 112 Engineering Specifications 1.0 Cooling Tower 1.1 General: Furnish and install factory-assembled, forceddraft, centrifugal fan, counter flow cooling tower(s) with vertical air discharge, conforming in all aspects to the specifications, schedules and as shown on the plans. Overall dimensions shall not exceed approximately mm long x mm wide x mm high. The total connected fan power shall not exceed kw. The cooling tower(s) shall be Baltimore Aircoil Model. 1.2 Thermal Capacity: The cooling tower(s) shall be warranted by the manufacturer to cool l/s of water from C to C at C entering wet-bulb temperature. 1.3 Corrosion Resistant Construction (standard): Unless otherwise noted in this specification, all steel panels and structural members shall be constructed of heavy-gauge Z600 metric hot-dip galvanized steel with all edges given a protective coating of zinc-rich compound and the exterior protected with the BALTIPLUS Protection. (Alternate 1.3) Corrosion Resistant Construction (optional): Unless otherwise noted in this specification, all steel panels and structural members shall be protected with the BALTIBOND Corrosion Protection System. The system shall consist of Z600 metric hot-dip galvanized steel prepared in a four-step (clean, pre-treat, rinse, dry) process with an electrostatically sprayed, thermosetting, hybrid polymer fuse-bonded to the substrate during a thermally activated curing stage and monitored by a 23-step quality assurance program. (Alternate 1.3) Corrosion Resistant Construction (optional): Unless otherwise noted in this specification, all steel panels and structural members shall be constructed of Type 304 or 316 stainless steel and assembled with stainless steel nut and bolt fasteners. 1.4 Quality Assurance: The cooling tower manufacturer shall have a Management System certified by an accredited registrar as complying with the requirements of ISO-9001:2000 to ensure consistent quality of products and services. 1.5 Warranty: The manufacturer s standard equipment warranty shall be for a period of not less than one year from date of startup or eighteen months from date of shipment, whichever occurs first. 2.0 Construction Details 2.1 Structure: The unit shall be constructed of heavy-gauge steel utilizing double-brake flanges for maximum strength and rigidity and reliable sealing of watertight joints. The unit shall be of unitary design to minimize rigging requirements. The fan(s) and fan drive system, including the fan motor, shall be factory mounted and aligned and located in the dry entering air stream to ensure reliable operation and ease of maintenance. 2.2 Heat Transfer Section: The heat transfer sections(s) shall consist of a wet deck surface, spray water distribution system and drift eliminators arranged for optimal thermal performance with minimal drift. 2.3 Wet Deck Surface: The wet deck surface shall be formed from self-extinguishing plastic material and shall be impervious to rot, decay, and fungus or biological attack. The wet deck surface shall be manufactured and performance tested by the cooling tower manufacturer to assure single source responsibility and control of the final product. 2.4 Water Distribution System: Water shall be distributed evenly over the wet deck surface by a water distribution system consisting of a header and spray branches of plastic pipe with large orifice, nonclog plastic distribution nozzles. The branches and spray nozzles shall be held in place by snap-in rubber grommets, allowing quick removal of individual nozzles or complete branches for cleaning or flushing. 2.5 Cold Water Basin: The cold water basin shall be provided with large area lift out strainers with perforated openings sized smaller than the water distribution system nozzles and an anti-vortexing device to prevent air entrainment. The strainer and anti-vortexing device shall be constructed of the same material as the basin to prevent dissimilar metal corrosion. Standard basin accessories shall include a brass make-up valve with large diameter polystyrene filled plastic float for easy adjustment of the operating water level. (Alternate2.5) Cold Water Basin: The cold water basin shall be constructed of heavy-gauge Type 304 or 316 stainless steel panels and structural members up to the heat transfer section/basin joint. The basin shall be provided with large area lift out strainers with perforated openings sized smaller than the water distribution system nozzles and an anti-vortexing device to prevent air entrainment. The strainer and anti-vortexing device shall be constructed of the same material as the basin to prevent dissimilar metal corrosion. Standard basin accessories shall include a brass make-up valve with large diameter polystyrene filled plastic float for easy adjustment of the operating water level. 3.0 Mechanical Equipment 3.1 Fan(s): Fan(s) shall be dynamically balanced, forwardly curved, centrifugal type selected to provide optimum thermal performance with minimal sound levels. Fan housings shall have curved inlet rings for efficient air entry and four-sided rectangular discharge cowls shall extend into the basin to increase fan efficiency and prevent water from splashing into the fans. 3.2 Bearings: Fan(s) and shaft(s) shall be supported by heavy-duty, self-aligning, relubricatable bearings with cast iron housings, designed for a minimum L10 life of hours ( Hr. Average. Life). 3.3 Fan Drive: The fan(s) shall be driven by matched V-belts with taper lock sheaves. Motor shall be located on a heavy-duty motor base, adjustable by a single threaded bolt-and-nut arrangement. Removable steel screens or panels shall protect the fan drive and all moving parts. 3.4 Fan Motor: Furnish kw, RPM Totally Enclosed, Fan Cooled (TEFC), squirrel cage, ball bearing type fan motors suitable for outdoor service. Motor(s) shall be suitable for volt, hertz, and phase electrical service. 3.5 BALTIGUARD Fan System (optional): Two-single speed fan motors, one sized for full speed and load, the other sized for 2/3 speed and approximately 1/3 of full load kw shall be provided in each cell for capacity control and stand-by protection from drive or motor failure. Two-speed motor(s) are not an acceptable alternative. Baltimore Aircoil

17 - B Drift Eliminators 4.1 Drift Eliminators: Eliminators shall be constructed of specially formulated plastic material and be removable in easily handled sections. They shall have a minimum of three changes in air direction. 5.0 Access 5.1 Basin Access: Circular access doors shall be provided for easy access to the make-up water assembly and suction strainer for routine maintenance. 6.0 Sound 6.1 Sound Level: To maintain the quality of the local environment, the maximum sound pressure levels (db) measured 15 m from the cooling tower operating at full fan speed shall not exceed the sound levels detailed below. Location db(a) Discharge Air Inlet End Back... because temperature matters

18 - B 114 Baltimore Aircoil has developed a network of highly qualified sales representatives backed up by an experienced technical staff who will work hand-in-hand with you to ensure that each of your projects is a success. If you need help deciding which product to use, you can count on the support of your local BAC Balticare representative to develop solutions that meet your requirements. You can find BAC contact details on the web or You can send a request to info-bac@baltimoreaircoil.be Baltimore Aircoil