Amcot LRC-H Manual

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
AMCOT COOLING TOWER CORPORATION
LRC-H & LRC-LNS
CROSS FLOW COOLING TOWER
OPERATIONS AND MAINTAINENCE
MANUAL
1-800-444-8693
Operation and Maintenance Manual
For Amcot LRC-H Cooling Tower &
LRC-LNS Cooling Towers
1. Preface
The following informationis intended to provide instruction, understanding, and includes
manufacturer recommendations for maintaining and operating your new LRC-model cooling
tower. Because it takes time to schedule maintenance and servicing after a tower has been
damaged, there are steps that the customer can take, to prolong and prevent damage to both their
tower and system as a whole. Please, read through this material and if at any time you have
questions relating to our cooling tower, contact us at our corporate office. If proper maintenance
is followed and you operate your tower within design parameters, Amcot’s LRC-model tower can
provide decades of solid operation and performance.
It is recommended that the servicing personnel should study the cooling tower in great detail.
Become familiar with the cooling process and the miscellaneous parts within our cooling tower.
You will be able to pinpoint problems and potentially solve a problem before it causes shutdown
of your cooling tower, which is costly to your application.

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
1.Motor 9. Air
2.Fan Stack 10. Overflow
3. Speed Reducer 11. Drain
4.Fan 12. Manual Make-Up
5.Distribution Pan 13. Automatic Make-Up
6.Distribution System 14. Outlet
7.Louver 15. Fill
8. Water
2. STRUCTURE
2.1 FRAME
The frame of your LRC-model cooling tower is either constructed of Hot Dipped Galvanized
steel or Stainless Steel, depending on what you specified at time of Purchase. Galvanized
steel will provide protection from rusting and corrosion. When the steel is maintained,
washed down andkept in good condition, your cooling tower’s structure will remain stable
and secure. Stainless-steel material also provides protection from rust and corrosion, and will
outlast galvanized steel depending on environmental conditions around your area. You
should consult the factory to determine which material will be sufficient in your application.
F.R.P. (Fiberglass Reinforced Plastic) materials are used in the basin, casing and other
sections of the tower. This material will not rust or corrode and has a high tolerance towards
chemical exposure. Please consult factory on limitations for certain chemicals to ensure that
you do not damage your fiberglass material. If used within the limitations, FRP material
provides structural integrity identical to that of Steel and is lighter in weight.
2.2 HEIGHT
Amcot’s LRC-model is smaller in height when compared to similar cooling towers. This is
beneficial because pump head within the tower is decreased, horsepower is decreased yet

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
identical air volume is achieved, resulting in lower operating costs with identical
performance.
2.3 INTERNAL SPACE
The internal structure of your LRC tower is designed to provide maximum working space for
repairs and maintenance. A sturdy platform, secured to the frame of the tower is provided for
your maintenance team. CAUTION: Due to slimes and algae that may build up the walkway
can become slippery. Take Precautions and where proper work boots.
2.4 Fan
The fan of your tower is designed to provide sufficient airflow at lower fan motor RPM and
operate at a lower decibel level.
2.5 Fill Materials
Fill material is made of PVC stiff sheets, which are formed by vacuum molding, differing
from standard materials used. This material has been tested both in laboratories and
applications, to perfection, enabling maximum water surface exposure, allowing for
maximum heat transfer.
2.6 Distribution System
LRC towers utilize gravity flow to distribute water evenly over fill material. Hot water
entering the tower is dispersed into a distribution pan located on top of the cooling tower next
to louvers. The hot water drops through the distribution pans that have predrilled and
predetermined hole placement to ensure that water is covering the entire fill media. This form
of distribution helps reduce pump size, friction loss, psi requirements, while providing even
distribution. The distribution plate within the pan helps slow water flow so that the heat
transfer can begin immediately.
3. INSTALLATION
3.1 CAUTIONS FOR INSTALLATIONS
A. Pick a location in which airflow is steady and free of structures, which may lower
efficiency.
B. Location should be relatively free of dust, acids, and other material, which could build up
in your tower and lower efficiency or damage the unit.
C. Keep the tower away from heat sources because these units raise the surrounding air
temperature, which will affect your cooling tower’s efficiency. (If this cannot be
avoided, an atmosphere temperature should be taken and provided to the factory for
recalculation).
D. Provide enough space for piping.
E. Be sure to keep the tower vertical when lifting or mounting to foundation. Once on
foundation, anchor bolts and legs of tower should be fastened tightly.
F. The design of the cooling tower is to pull air through the air inlets (louver sides). Be sure
that proper space is provided between the tower and an obstacle if structure free areas are
not allowable. SEE TABLE BELOW

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
LRC MODEL
DISTANCE FROM STRUCTURES (i.e., Buildings, etc..)
80 ~ 125 More Then 6.5 Feet
150 ~ 200 More Then 8 Feet
225 ~ 350 More then 9.5 Feet
400 ~ 600 More Then 10.5 Feet
700 ~ 800 More Then 13 Feet
900 ~ 1250 More Then 16.5 Feet
3.2 Pump and Piping
A. Regarding the piping illustration for cooling tower, please refer to the following chart:
B. When doing the piping work, diameter and length of the inlet pipe rigged on the two sides of
the hot water basin should be matched accordingly. Flow Control valves should be installed.
C. The pipe diameter should also match the water flow of tower design.

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
4. Preparations Before Operations
4.1 Irrelevant objects by the air inlet or surrounding the fan stack should be removed.
4.2 Be sure that Fan blade will not make contact with Fan stack so as to avoid damage to tower.
4.3 Check to see if the V-Belts of Speed Reducer are properly adjusted.
4.4 V-Belts have to be positioned on the same level.
4.5 After the above checks have been made, switch the fan motor on and off intermittently to see
if the fan revolves correctly. At this time you can also check for any abstract noises or
vibrations.
4.6 Clean dust and dirt from inside the cold water basin and then fill basin to the overflow level.
4.7 Remove all foreign objects and materials from the Hot water distribution pans on top of
cooling tower.
4.8 Turn Centrifugal Pump on and off intermittently to remove air from pipes and allow water to
fill the system.
4.9 When the pump is in normal operation water level will decrease depending on length of run
and actually flow rates required. Float Valve should be adjusted at this point to ensure design

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
cold water temperature is being met, flow rate is adequate and all pipe connection are safely
submerged.
5. Power System
5.1 Connect the wires according to wire diagram.
5.2 Re-identify the switches for power system, check if the fuse and connecting wires match with
the motor horsepower and avoid single-phase revolution.
6. Starting
6.1 Start and stop Fan motor, checking to see if motor revolves in the specified direction or if
abnormal vibrations or noises begin. If so, shut down the unit and contact Amcot for
recommendations.
6.2 Check if the Fan Motor is receiving correct voltage and is constant. It is recommended that a
vibration switch be used to prevent excessive vibration as a result of fan imbalance or other
problems which can generate vibration
6.3 Adjust the water flow with control valves to keep water level of hot water basin between 2~3
inches high.
6.4 Check to be sure desired water level in cold water basin remains constant.
7. Cooling Tower Operation.
7.1 After five to six days of operation, check V-Belts once more to be sure that they have not
loosened. If they have, retighten these belts to avoid reduction in fan blade speed and to
prevent damage to reducer.
7.2 The circulation water should be replaced at this time to rid system of dirt and debris and to
prevent blockage of piping.
8. Routine Maintenance
Please consult a water treatment specialist to verify percentage of bleed that should be established
on your system. This will be dependent upon the level of calcium, chlorine, and other minerals
within your water supply. Be sure to check hot water and cold water basins on a regular basis and
clean any debris that is found within these sections of the tower. This will increase the life of your
cooling towers because water quality is one of the major reasons behind tower efficiency and
structural integrity. Also make a habit of checking V-Belts, Dispersion holes and fill material to
make sure no blockage is occurring. If so, these units can be cleaned using garden hose nozzles or
which simple items like a screwdriver.
9. Seasonal Shutdown
9.1 Loosen the V-Belts located within the speed reducer and lubricate bearings.

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
9.2 All circulating water should be drained and disposed of or placed within a holding tank to
prevent damage to piping during winter months in which temperatures will drop below
freezing.
9.3 Before restarting cooling tower, be sure that all parts are intact and that nothing is obstructing
movable parts which could result in damage. If needed, contact Amcot our your local service
representative to perform an inspection on the cooling tower.
10. Cooling Tower Performance
Flow rates and water level along with the wet bulb, hot water, and cold water temperatures are the
major factors in cooling tower performance. If performance appears to have increased or
decreased during life of tower, consult the chart below to find possible reasons. If these reasons
are not applicable, contact Amcot for a consultation.
Causes of Increase Cause of Decrease
1. The heat load has increased. 1. The heat load has decreased.
2. Circulating water has decreased. 2. Circulating Water has Increased.
3. The difference between inlet water temperature 3. Difference between Inlet and Wet
and wet-bulb has increased. Bulb temperature has decreased.
4. Low inlet water Temperature when
entering tower.
The addition or removal of equipment will affect heat loads. It is important to know what the
capacity limitations of your cooling tower is to ensure that you do not adversely affect the performance of
the
Cooling Tower. It is impossible to get a normal temperature reading at one particular instance because
weather conditions throughout the day can affect tower cooling. A series of days in differing conditions
should be used to determine an average that will constitute the best determination. In plain, on hot days
cooling tower efficiency may decrease, on cold days, cooling tower performance will increase.
The addition or removal of equipment also affects flow rates. In addition, flow rates can be
affected by pipe blockage or clogging. It is important to keep your pipelines free of debris and to obtain
good water treatment that will limit algae, slimes and calcium build-ups. This will also increase the life of
your equipment.

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
Trouble-Shooting Table
Trouble Causes Solutions
Noises
And
Vibrations
1. Loose Bolts
2. Fan Blade tip making contact with
fan stack
3. Fan Not Balanced.
4. Bearing Malfunction.
5. Motor Malfunction.
6. Speed Reducer
1. Retighten bolts
2. Shut Down, Adjust Motor
Base to provide equal
clearance between fan stack
and fan.
3. Adjust pitches to equalize
4. Replace bearings.
5. Rewind or replace motor.
6. Check reducer, make sure
well oiled/greased, check v-
belts to be sure they are
tight.
Power Overloads 1. Excessive drops in Voltage
2. Improper fan blade angle.
3. Motor malfunction
1. Check power supply.
2. Adjust pitches to
recommended settings
3. Replace motor
Rise in water
temperature 1. Decrease in waterflow. 2. Drop in water level of basin or
distribution pans.
3. Decrease in air flow
4. Blockage of inlet louvers
1. Check water pump and
pipes for blockage.
2. Clean distribution pans and
check float valve.
3. Check fill material for
blockage, check reducer v-
belts, check motor.
4. Remove debris, be sure
louvers are equal distance
apart.
Drop in Water Flow 1. Blockage of Strainer
2. Water basin level decreases
3. Inadequate water flow from pump
1. Remove and clean strainer.
2. Adjust float valve.
3. Check pump seals and
connections.
Water carry-over
1. Excessive Water Flow 2. Unevenness of water volume in
distribution basin.
3. Excessive air flow.
1. Adjust water flow rate
through pumps or with flow
valves.
2. Clean distribution pan.
3. Adjust fan blade pitches to
reduce drift loss.
11.0 CALCULATION OF MAKE-UP WATER
The gradual loss of circulating water during operation is caused by the following factors:
A. During heat exchange, the contact of cold air and hot water will generate an evaporation loss
due to moisture absorption into air flow. This is knownas evaporation loss, which is how
heat exchange is accomplished.
B. As air volume increases the driving force of this current overcomes the gravitational flow of
water fall and causes a small amount of water to be carried out of the tower.
C. When the water is circulating for a long time, solids build up and as this concentration
increases it becomes vital to “bleed” a certain amount of water from the tower which is
known as a bleed loss. This will prevent buildup of contaminants which can affect tower
structure.
11.1 Calculating Evaporation Loss

AMCOT COOLING TOWER CORPORATION OPERATIONS AND MAINTAINENCE MANUAL IS
OWNED BY LIANG CHI (USA) CORPORATION. THE NAME “AMCOT” AND AMCOT PRODUCT
LOGO ARE TRADEMARKS AND ANY REPRODUCTION WITHOUT WRITTEN CONSENT WILL
BE A VIOLATION OF LAW AND SUBJECT TO LEGAL ACTIONS. ALL RIGHTS RESERVED, 1998.
E = Q/1000 = (T1-T2) / 1000 x L
E= Evaporating Water GPM
Q= Heat Load BTU/Hr
1000 = Water Evaporation Heat BTU/Hr
T1= Inlet Water Temperature oF
T2= Outlet Water Temperature oF
L= Circulating Water Flow GPM
11.2 The Loss Of Carry-Over
The loss of Carry-over depends on the cooling tower design, and Air Velocity. Generally
speaking, the loss is equal to 0.2% to 0.3% of total circulation water.
11.3 The Loss of Regular Blow-Down
To decrease the loss of blow-down, please follow the procedures below:
A. Open the drain on the hot water basin while the cooling tower is in operation.
B. Increase the operational water level to anticipate the water flowing out of the overflow outlet
C. Replace the water in the cold water basin and pipes annually.
The water quality and its concentration of solids will determine the loss of regular blow-down.
Generally speaking, the loss is about 0.3% of total circulating water.
11.4 Make-up Water Calculation
The total make-up water of circulating water is equal to:
M = E + C + D
M = Make-up Water E = Evaporation Loss
C = Carry-over D = Regular Blow-down Loss
When the cooling tower is rigged to an air-conditioner, the cooling range is set at 10 oF. In this
case, the make-up water needed for the cooling toweris about 2% of the circulation water.