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Delta TM Series Cooling Tower - page 1
Revised 1-8-2007 Delta Cooling Towers, Inc. TM Series Cooling Tower Installation, Operation & Maintenance Manual ...
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Delta TM Series Cooling Tower - page 2
Revised 1-8-2007 1 Table of Contents Delta Cooling Towers Principle of Cooling Towers………………..……………. 2 Cooling Tower Terms and Definitions…………………… 2 Water Treatment……..………………………….……….. 3 General Information Safety………………..………………………………….… 3 Appr ...
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Delta TM Series Cooling Tower - page 3
Revised 1-8-2007 2 Delta Cooling Towers Principle of Cooling Towers All Cooling Towers operate on the principle of removing heat from water by evaporating a sm all 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 approxi ...
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Delta TM Series Cooling Tower - page 4
Revised 1-8-2007 3 Water Treatment • The Delta Cooling Towers are manufactured from corrosion-resistant plastics which are resistant to water treatment chemicals including com mon fungicides and bactericides. • Follow appropriate water treatment practices as require d and take frequent sample tests to avoid possible water contamination. We also ...
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Delta TM Series Cooling Tower - page 5
Revised 1-8-2007 4 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 assem blies installed. The tower sump ships as a separate piece. Approximate Weights (lbs.) Overall Dimensions (inches) Model Grou ...
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Delta TM Series Cooling Tower - page 6
Revised 1-8-2007 5 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 dam age has occurred, notify the driver or the carrier immediately and m ake a notation of the damage on the shipping bill of lading. Check that all items listed B/ ...
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Delta TM Series Cooling Tower - page 7
Revised 1-8-2007 6 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 prepa ...
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Delta TM Series Cooling Tower - page 8
Revised 1-8-2007 7 • 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 ...
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Delta TM Series Cooling Tower - page 9
Revised 1-8-2007 8 • 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 ...
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Delta TM Series Cooling Tower - page 10
Revised 1-8-2007 9 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 shoul ...
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Delta TM Series Cooling Tower - page 11
Revised 1-8-2007 10 PVC Solvent Cementing Instructions The following procedure is recommended for the preparation and cem enting 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 ...
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Delta TM Series Cooling Tower - page 12
Revised 1-8-2007 11 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 t ...
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Delta TM Series Cooling Tower - page 13
Revised 1-8-2007 12 • The maximum operating inlet water temperature should not exceed 140° F. CAUTION: When stepping on top of the fill, distribute th e 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 discus ...
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Delta TM Series Cooling Tower - page 14
Revised 1-8-2007 13 • Check spray pattern from nozzles to be sure there is no clogging. Remove drift elim inators for nozzle inspection, then return to proper position. • Start up fan motor and check amperage and voltage against m otor nameplate data. • The standard make-up valve assembly is shipped with the plastic float ball strapped agains ...
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Delta TM Series Cooling Tower - page 15
Revised 1-8-2007 14 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 recomm ended for use in Delta Cooling towers for protection during cold w ...
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Delta TM Series Cooling Tower - page 16
15 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 ...
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Delta TM Series Cooling Tower - page 17
16 Trouble-Shooting Guide For TM Series Induced Draft Cooling Towers Problem Possible Causes Corrective Actions Increase in the leaving water temperature 1. Excess water flow; over pumping. 2. Recirculation of hot discharge air, back into the cooling tower air intakes. Obstructed air intakes 3. Proximity of other heat source or discharge of moist a ...
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Delta TM Series Cooling Tower - page 18
17 Problem Possible Causes Corrective Actions 2. Airlock. 3. Unnecessary obstruction of waterflow (i.e., partially closed valve). 4. Undersized piping. 5. Horizontal pipe run too long. 6. Improper hydraulic pipe design. 7. Outlet vortex breaker provided. 2. Install an air bleed valve at highest point of piping, usually at a vertical angle. 3. Remov ...
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Delta TM Series Cooling Tower - page 19
18 Motor Trouble Shooting Guide (General) Problem Possible Causes Corrective Actions High current draw (all 3 phases) 1. Low line voltage (5 to 10% lower than nameplate). 2. 200V motor on 230/240V system. 3. 230V motor on 208V system. 4. Incorrect propeller. 5. Incorrect pitch if adjustable 1. Consult power company. 2. Change to 230V motor. 3. Chan ...
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Delta TM Series Cooling Tower - page 20
19 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 switc ...
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Delta TM Series Cooling Tower - page 21
20 Preventative Maintenance Checklist Procedure Monthly Every 3 Months Every 6 months Inspect General Condition of cooling tower. ¨ Check Water Level in cold water basin. Adjust if needed. ¨ Check float ball & Make-up Valve for proper operation. ¨ Check Line Voltage, Motor Amperage, Water Pressure . ¨ Clean Sump Strainers , if installed. ¨ ...
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