Delta TM-105312 User Manual

Delta Cooling Towers, Inc.

TM Series Cooling Tower

Installation, Operation & Maintenance

Revised 1-8-2007

Manual

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 & Accessories……..…….. 8
Location, Piping & Connections……..…….……….…….. 8
PVC Solvent Cementing Instructions………………...…… 10

Operation and Maintenance Safety in Operation of the Fan..…..………..…….….……. 11

Water Distribution System……..…………………………. 11
Fan & Mechanical Drive System….………………..…...… 12
Start-up Instructions………………………………..…….. 12
Water Level in Tower Sump…..……..…….……….…….. 13
Cold Weather Operation…………...………………...…… 14
Trouble-Shooting Guide.…………...……………….….… 16

Motor Trouble-Shooting Guide…………...………....…… 18

Other Information Cooling Tower Optional Accessories..…..…...….….……. 19

Recommended Replacement Parts……..…………………. 19
Preventative Maintenance Checklist….……………….….. 20

Important:

Delta’s cooling towers have been designed to provide trouble-free service over an extended period of time. To obtain

the design performance, it is necessary that the cooling tower be installed, operated and maintained as prescribed in
these instructions.

Only persons possessing the skill and experience described herein should attempt to install this equipment. Prior to
installation, these instructions should be read carefully by the person who is to install the cooling tower to be
certain that its installation, operation and maintenance are thoroughly understood.

Questions regarding the installation, operation or maintenance of this equipment should be directed to Delta Cooling
Towers, Inc., Rockaway, New Jersey, (Telephone: [phone]).

Step-by-step instructions contained in this brochure are based on normal installation conditions only. Abnormal or
unusual combinations of field conditions should be brought to the attention of Delta Cooling Towers or its
representative prior to installation of the equipment. The information contained herein is subject to change without
notice in the interest of product improvement.

Revised 1-8-2007

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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 of one pound of water one degree Fahrenheit

in the range from 32° F. to 212° F.

Cooling Range - The difference in temperature between the hot water entering the tower and the cold water
leaving the tower is the cooling range.

Approach - The difference between the temperature of the cold water leaving the tower and the wet-bulb
temperature of the air is known as the approach. Establishment of the approach fixes the operating temperature
of the tower and is a most important parameter in determining both tower size and cost.

Drift - The water entrained in the air flow and discharged to the atmosphere. Drift loss does not include water
lost by evaporation. Proper tower design and operation can minimize drift loss.

Heat Load - The amount of heat to be removed from the circulating water within the tower. Heat load is equal to
water circulation rate (gpm) times the cooling range times 500 and is expressed in BTU/hr. Heat load is also an
important parameter in determining tower size and cost.

Ton - An evaporative cooling ton is 15,000 BTU's per hour.

Wet-Bulb Temperature - The lowest temperature that water theoretically can reach by evaporation. Wet-Bulb

Temperature is an extremely important parameter in tower selection and design and should be measured by a
psychrometer.

Pumping Head - The pressure required to pump the water from the tower basin, through the entire system and
return to the top of the tower.

Make-Up - The amount of water required to replace normal losses caused by bleed-off, drift, and evaporation.

Bleed Off (Blowdown) - The circulating water in the tower which is discharged to waste to help keep the

dissolved solids concentration of the water below a maximum allowable limit. As a result of evaporation,
dissolved solids concentration will continually increase unless reduced by bleed off.

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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 determine the appropriate water treatment practices for your particular application, it is suggested that
you contact a water treatment firm for their recommendation. A list of water treatment firms is available for
your reference. It is not necessarily complete nor do we recommend a specific firm. The list will be mailed to
you on request or consult your local yellow pages.

• Bleed-off is also important to water quality. Evaporation of the recirculated water does not remove the
dissolved solids that are present in the water. Without bleed-off, the continual buildup of these solids will
impair the proper functioning of the piping and other equipment in the system.

• A bleed line can be connected in any part of the system for routing to the sewer. Normally, it is most
desirable to make this connection in the hot water line at the cooling tower. A petcock type valve, installed in
the bleed line is recommended. Normally, bleed-off of 1% to 2% of the recirculation water flow is
satisfactory. The required amount of bleed-off water must be substituted with properly controlled amounts of
make-up water.

General Information

Safety

When handling, lifting, installing or operating the cooling tower, always employ safe work procedures,
according to best practices of the trade and according to applicable construction, electrical and safety standards,
regulations and codes.

Follow all safety practices described in these instructions.

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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.

Approximate Weights (lbs.)

Model Group Shipping

TM-105312 – TM-115412

TM-205312 – TM-215412

TM-305312 – TM-315412

Body Sump

4,850

(2) 4,850 (2) 1,660

(3) 4,850 (3) 1,760

1,660

Overall

Dimensions

(inches)

Operating L x W x H

11,800 198” x 102” x 186”

23,600 198” x 204” x 186”

35,400 198” x 306” x 198”

TM-405312 – TM-415412

TM-505312 – TM-510412

TM-605312 – TM-610412

(4) 4,850 (4) 1,760

(5) 4,850 (5) 1,760

(6) 4,850 (6) 1,760

Dimensions and Other Physical Data

For cooling tower dimensions, design for foundations, assembly and layout, refer to the following
drawings which are a part of these instructions:

Model Group Title Drawing No.

TM-105312 – TM-115412
TM-205312 – TM-215412

TM-305312 – TM-315412
TM-405312 – TM-415412
TM-505312 – TM-510412

TM-605312 – TM-610412

1 Cell DT-D-87-901
2 Cell (5 - 7.5 HP) DT-D-87-902
2 Cell (10 – 15 HP) DT-D-87-903

3 Cell

4 Cell DT-D-87-905-1

5 Cell DT-D-87-906-1

6 Cell

DT-D-87-907-1

47,200

59,000 198” x 510” x 198”

70,800 198” x 612” x 198”

198” x 408” x 198”

DT-D-87-904-1
DT-D-87-904-2

DT-D-87-905-2
DT-D-87-906-2

DT-D-87-907-1

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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 assembly and sump assembly are strapped down to the truck bed. The sump assembly should be
unloaded first.

Lifting with crane:

• Use fabric slings of sufficient strength for better load distribution and protection of the plastic tower
body.

• Wrap slings underneath tower sump assembly to lift and set into place.

• Lift tower body by attaching slings, kept separate by spreader bars, to the four lifting bars as shown

below.

• Spreader bars must be used to lift vertically on the lifting bar. Above the spreader bars use adequate
length straps specifically designed for vertical lifting in order to maintain an angle of 60° or less between
slings.

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Lifting Bar

5

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 sump box to the center support post using the hardware provided as shown.

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