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Delta Cooling Towers, Inc.
TM Series Cooling Tower
Installation, Operation & Maintenance
Manual
Revised 1-8-2007
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Table of Contents Delta Cooling Towers Principle of Cooling Towers………………..……………. 2 Cooling Tower Terms and Definitions…………………… 2 Water Treatment……..………………………….……….. 3 General Information Safety………………..………………………………….… 3 Approximate Weights………………..…………………… 4 Dimensions & Other Physical Data……..………...……… 4 Handling & Installation On-Site Inspection………………..………..…….….……. 5 Off Loading……..……………..………………………….. 5 Anchoring……..……….…………………………..……… 8 Electrical Wiring of Fan Motor &
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Delta Cooling Towers Principle of Cooling Towers All Cooling Towers operate on the principle of removing heat from water by evaporating a small portion of the water that is recirculated through the unit. The heat that is removed is called the latent heat of vaporization. Each one pound of water that is evaporated removes approximately 1,000 BTU's in the form of latent heat. Cooling Tower Terms and Definitions BTU - A BTU is the heat energy required to raise the temperature
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Water Treatment • The Delta Cooling Towers are manufactured from corrosion-resistant plastics which are resistant to water treatment chemicals including common fungicides and bactericides. • Follow appropriate water treatment practices as required and take frequent sample tests to avoid possible water contamination. We also recommend water treatment maintenance as a measure of protection of the environment in the vicinity of any cooling tower or other equipment open to atmosphere. • To
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Approximate Weights The TM Series cooling towers are manufactured in three basic sections; a polyethylene tower body, a polyethylene sump, and a fan assembly section. The tower body ships with the fan assemblies installed. The tower sump ships as a separate piece. Overall Approximate Weights (lbs.) Dimensions (inches) Model Group Shipping Operating L x W x H Body Sump TM-105312 – TM-115412 4,850 1,660 11,800 198” x 102” x 186” TM-205312 – TM-215412
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Handling and Installation of Your TM Series Cooling Tower On -Site Inspection Upon arrival at the job site, carefully inspect the shipment for any damage. If shipping damage has occurred, notify the driver or the carrier immediately and make a notation of the damage on the shipping bill of lading. Check that all items listed B/L have been received. Offloading The TM Series cooling towers are normally delivered to the site on a 30 inch high drop deck trailer. Both the tower body
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Store tower assembly as shipped until the time of installation, in a secure, level and debris free location at the job site. CAUTION: For extended lifts, use duplicate rigging, fabric slings around body as shown, as an additional safety precaution. Installing The cooling tower should be assembled in place on the previously prepared foundation. • After re-checking the rigging, lift the sump section of each cell and secure properly to the foundation. • Attach the fiberglass
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• The body section should then be lifted and carefully position to align the support post of the sump with the corresponding groove of the tower body. Note that the four corner posts are slightly higher than other post to ease installation alignment. • Set one end of the tower body onto the corner post at one end of the sump first. This can be accomplished by use of a rope tether attached to the lifting bar at one end of the housing. Continue setting and aligning sup
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• On multi cell towers, install PVC water redirector panels between each sump using self-tapping screws provided (See sketch below). Start with screwing the PVC post from the bottom up. Next apply a heavy bead of RTV sealant on the end of each redirector panel. Start screwing the redirector panels from the end nearest the post toward the center. Do not screw overlapping panels to allow for expansion and contraction.
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Electrical Wiring of Fan Motor and Accessories • Installation of a vibration cut-out switch is recommended. (Refer to tower accessories available). • All electrical work should be performed only by qualified personnel and in accordance to prevailing electrical codes, practices and safety standards. • The motor starter should be sized on voltage, nominal horsepower, and maximum full load current. This current value can be found on the motor nameplate. If the starter cannot accept the ma
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PVC Solvent Cementing Instructions The following procedure is recommended for the preparation and cementing of internal and external piping for Delta Cooling Towers: • Cut ends of pipe square using a handsaw and miter box. Tube cutters with wheels designed for use with PVC are acceptable, providing they do not leave a raised bead on the outside diameter of the pipe. • Use a chamfering tool or file to put a 10° to 15° chamfer on the end of the pipe. Lightly sand the area to be cem
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Operation and Maintenance of Your TM Series Cooling Tower Safety in Operation of the Fan NEVER operate the fan when the access panel or the entire fan guard is removed. NEVER remove access manhole cover while fan is in operation. NEVER operate fan when any work, access, maintenance, trouble-shooting, etc. is being performed on the inside of the fan ring assembly or inside the tower plenum. • Normally, electrical codes dictate a disconnect box at the cooling tower. • The han
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• The maximum operating inlet water temperature should not exceed 140° F. CAUTION: When stepping on top of the fill, distribute the body weight by means of two plywood plates as described earlier in these instructions. Fan and Mechanical Drive System and Its Maintenance Safety Follow all safety instructions previously discussed. Motor: • The standard motor is a totally enclosed motor , Class F insulation, 1.15 minimum service factor, epoxy coating on outside frame, and
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• Check spray pattern from nozzles to be sure there is no clogging. Remove drift eliminators for nozzle inspection, then return to proper position. • Start up fan motor and check amperage and voltage against motor nameplate data. • The standard make-up valve assembly is shipped with the plastic float ball strapped against the tower side to prevent damage. To set the ball for proper operation, loosen the screw in the fulcrum arm, lift or depress the arm with the plunger pressed against th
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Cold Weather Operation Cold Weather Protection The cooling tower may require protection against freezing at light heat loads when the wet-bulb temperature is under 32°F., or during shutdown when the temperature drops below 32°F. The following methods are recommended for use in Delta Cooling towers for protection during cold weather conditions. Recommended equipment is optional and may be ordered from the factory. Consult the factory for further information on which equipment to choos
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PVC Distribution System To prevent damage to the PVC distribution system during cold weather shut-down, install an automatic or manual drain line from the hot water inlet piping as close to the cooling tower inlet as possible. The entire inlet and distribution system must be drained for shut-down in sub- freezing weather. Piping When the cooling tower is located outdoors, adequate measures including the use of heating tapes and insulation should be considered to protect water lines fro
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Trouble-Shooting Guide For TM Series Induced Draft Cooling Towers Problem Possible Causes Corrective Actions Increase in the leaving water 1. Excess water flow; over pumping. 1. Adjust to the design flow. temperature 2. Recirculation of hot discharge air, back into 2. Eliminate obstructions which impede air discharge. the cooling tower air intakes. Obstructed air For proper location of cooling tower(s), see Delta intakes dwgs. Baffle air discharge, if necessary. 3. Proximity of
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Problem Possible Causes Corrective Actions 2. Airlock. 2. Install an air bleed valve at highest point 3. Unnecessary obstruction of waterflow of piping, usually at a vertical angle. (i.e., partially closed valve). 3. Remove obstruction. 4. Undersized piping. 4. Increase pipe size. 5. Horizontal pipe run too long. 5. Shorten, if possible. 6. Improper hydraulic pipe design. 6. Correct design. 7. Outlet vortex breaker provided. 7. Remove vortex breaker. Excessively high water level
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Motor Trouble Shooting Guide (General) Problem Possible Causes Corrective Actions High current draw (all 3 phases) 1. Low line voltage (5 to 10% lower 1. Consult power company. than nameplate). 2. 200V motor on 230/240V system. 2. Change to 230V motor. 3. 230V motor on 208V system. 3. Change to 200V or 280V motor. 4. Incorrect propeller. 4. Consult factory. 5. Incorrect pitch if adjustable 5. Reduce pitch / consult factory Low motor current draw 1. Incorrect propeller. 1. Consult
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TM Series Optional Accessories TM Series Optional Accessories Available Aluminum Ladder(s) with a step platform and railing at the fan elevation custom designed for the cooling tower. Safety cage(s). Two speed motor(s) designed for cooling tower duty to the exclusive specifications of Delta Cooling Towers. Vibration cut-out switch provides for fan motor circuit disconnect for shutdown protection should abnormal fan vibration develop during service. Installation of vibration c
