Sterling A0552321 User Manual

Cooling Tower Water and

Chilled Water Pump Tanks

Part Number: A0552321

Bulletin Number: SC5-605.7

Effective: 4/11/08

Write Down Your Serial Numbers Here For Future Reference:
_________________________ _________________________
_________________________ _________________________
_________________________ _________________________

We are committed to a continuing program of product improvement.
Specifications, appearance, and dimensions described in this manual are subject to change
without notice.

DCN No. ____________
© Copyright 2008
All rights reserved.

Shipping Information

Unpacking and Inspection

You should inspect your equipment for possible shipping damage. Thoroughly check the
equipment for any damage that might have occurred in transit, such as broken or loose wiring
and components, loose hardware and mounting screws, etc.

In the Event of Shipping Damage

According to the contract terms and conditions of the Carrier, the responsibility of the
Shipper ends at the time and place of shipment.

Notify the transportation company’s local agent if you discover damage
Hold the damaged goods and packing material for the examining agent’s inspection. Do not

return any goods before the transportation company’s inspection and authorization.

File a claim with the transportation company. Substantiate the claim by referring to the
agent’s report. A certified copy of our invoice is available upon request. The original Bill of
Lading is attached to our original invoice. If the shipment was prepaid, write us for a
receipted transportation bill.

Advise customer service regarding your wish for assistance and to obtain an RMA (return
material authorization) number.

If the Shipment is Not Complete

Check the packing list as back-ordered items are noted on the packing list. In addition to the
equipment itself, you should have:

; Bill of lading
; Packing list
; Operating and Installation packet
; Electrical schematic and panel layout drawings
; Component instruction manuals (if applicable)

Re-inspect the container and packing material to see if you missed any smaller items during
unpacking.

If the Shipment is Not Correct

If the shipment is not what you ordered, contact the parts and service department
immediately at [phone]. Have the order number and item number available. Hold

the items until you receive shipping instructions.

Returns

Do not return any damaged or incorrect items until you receive shipping instructions from the
shipping department.

Pump Tanks ii

Table of Contents

CHAPTER 1: SAFETY .................................................................5

1-1 How to Use This Manual.................................................................................5

Safety Symbols Used in this Manual.....................................................................5

1-2 Warnings and Precautions..............................................................................6

1-3 Responsibility.................................................................................................. 6

CHAPTER 2: FUNCTIONAL DESCRIPTION...............................7

2-1 Models Covered in This Manual......................................................................7

2-2 General Description ........................................................................................7

2-3 Standard Features ..........................................................................................8

2-4 Optional Features............................................................................................ 9

CHAPTER 3: INSTALLATION ...................................................10

3-1 Uncrating Your Pump Tank........................................................................... 10

3-2 Installation Location Considerations.............................................................. 10

3-3 Rigging.......................................................................................................... 10

3-4 Installing Separate Tank Ledge Models........................................................11

3-5 Installing Optional Equipment........................................................................ 11

3-6 Making Electrical Connections......................................................................11

3-7 Making Piping Connections...........................................................................12

Tower Tank Piping Connections .........................................................................14

Chilled Water Piping Connections.......................................................................15

3-8 Initial Start-up................................................................................................ 15

CHAPTER 4: OPERATION ........................................................16

4-1 Start-up ......................................................................................................... 16

4-2 Determining Flow Rate.................................................................................. 16

4-3 Stand-by Pump Usage..................................................................................17

Single Stand-by pump:........................................................................................17

Dual Stand-By Pump...........................................................................................17

4-4 Shut-down..................................................................................................... 17

CHAPTER 5: MAINTENANCE...................................................18

5-1 Preventative Maintenance.............................................................................18

Water Treatment .................................................................................................18

Lubricating Pump Motors and Seals....................................................................18

Maintaining Makeup Valve Assemblies...............................................................18

CHAPTER 6: APPENDIX ...........................................................19

6-1 Technical Assistance .................................................................................... 19

Parts Department ................................................................................................19

Service Department.............................................................................................19

6-2 Remote Starters and NEMA Panels..............................................................20

Pump Tanks iii

NEMA Panel Standard Features.........................................................................20

NEMA Panel Options ..........................................................................................20

6-3 Drawings and Specifications.........................................................................21

Cooling Tower Water Pump Tanks......................................................................21

Chilled Water Pump Tanks..................................................................................23

Process Pump Curves and Specifications...........................................................25

Re-circulation Pump Curves and Specifications..................................................26

6-4 Parts List.......................................................................................................27

Recommended Spare Parts................................................................................27

Spare Process Pump Seals and Casing Gaskets...............................................27

Spare Re-circulating Pump Seals and Casing Gaskets......................................27

6-5 Optional Assembly Detail Drawings.............................................................. 28

Tank Support Leg Assembly Detail: 4 Legs ........................................................28

Tank Support Leg Assembly Detail: 6 Legs ........................................................29

Tank Support Leg Assembly Detail: 7 Legs ........................................................30

Tank Ladder Assembly Detail..............................................................................31

Sightglass Assembly Detail.................................................................................32

6-6 Typical Piping Diagrams................................................................................ 33

Typical Single Well Cooling Tower Water Pump Tank Piping System................33

Typical Dual Well Cooling Tower Pump Tank Piping System.............................34

Typical Single Well Chilled Water Pump Tank Piping System............................35

Typical Dual Well Chilled Water Pump Tank Piping System...............................36

Pump Tanks iv

Chapter 1: Safety

1-1 How to Use This Manual

Use this manual as a guide and reference for installing, operating, and maintaining your
equipment. The purpose is to assist you in applying efficient, proven techniques that enhance
equipment productivity.

This manual covers only light corrective maintenance. No other maintenance should be
undertaken without first contacting a service engineer.

The Functional Description section outlines models covered, standard features, and optional
features. Additional sections within the manual provide instructions for installation, pre­operational procedures, operation, preventive maintenance, and corrective maintenance.

The Installation chapter includes required data for receiving, unpacking, inspecting, and setup
of the equipment. We can also provide the assistance of a factory-trained technician to help
train your operator(s) for a nominal charge. This section includes instructions, checks, and
adjustments that should be followed before commencing with operation of the equipment.
These instructions are intended to supplement standard shop procedures performed at shift,
daily, and weekly intervals.

The Operation chapter includes a description of electrical and mechanical controls, in
addition to information for operating the equipment safely and efficiently.

The Maintenance chapter is intended to serve as a source of detailed assembly and
disassembly instructions for those areas of the equipment requiring service. Preventive
maintenance sections are included to ensure that your equipment provides excellent, long
service.

The Troubleshooting chapter serves as a guide for identification of most common problems.
Potential problems are listed, along with possible causes and related solutions.

The Appendix contains technical specifications, drawings, schematics, and parts lists. A
spare parts list with part numbers specific to your machine is provided with your shipping
paperwork package. Refer to this section for a listing of spare parts for purchase. Have your
serial number and model number ready when ordering.

Safety Symbols Used in this Manual

The following safety alert symbols are used to alert you to potential personal injury hazards.
Obey all safety messages that follow these symbols to avoid possible injury or death.

Danger! DANGER indicates an imminently hazardous situation which, if not avoided,

will result in death or serious injury.

Warning! WARNING indicates a potentially hazardous situation or practice which, if not

avoided, could result in death or serious injury.

Caution! CAUTION indicates a potentially hazardous situation or practice which, if not

avoided, may result in minor or moderate injury or in property damage.

Pump Tanks Chapter 1: Safety 5 of 36

1-2 Warnings and Precautions

Our equipment is designed to provide safe and reliable operation when installed and operated
within design specifications, following national and local safety codes.

To avoid possible personal injury or equipment damage when installing, operating, or
maintaining this equipment, use good judgment and follow these safe practices:

; Follow all SAFETY CODES.
; Wear SAFETY GLASSES and WORK GLOVES.
; Disconnect and/or lock out power before servicing or maintaining the equipment.
; Use care when LOADING, UNLOADING, RIGGING, or MOVING this

equipment.

; Operate this equipment within design specifications.
; OPEN, TAG, and LOCK ALL DISCONNECTS before working on equipment.

You should remove the fuses and carry them with you.

; Make sure the equipment and components are properly GROUNDED before you

switch on power.

; When welding or brazing in or around this equipment, make sure VENTILATION is

ADEQUATE. PROTECT adjacent materials from flame or sparks by shielding with

sheet metal. An approved FIRE EXTINGUISHER should be close at hand and
ready for use if needed.

; Refrigeration systems can develop refrigerant pressures in excess of 500 psi (3,447.5

kPa/ 34.47 bars). DO NOT CUT INTO THE REFRIGERATION SYSTEM. This
must be performed by a qualified service technician only.

; Do not restore power until you remove all tools, test equipment, etc., and the

equipment and related components are fully reassembled.

; Only PROPERLY TRAINED personnel familiar with the information in this

manual should work on this equipment.

We have long recognized the importance of safety and have designed and manufactured our
equipment with operator safety as a prime consideration. We expect you, as a user, to abide
by the foregoing recommendations in order to make operator safety a reality.

1-3 Responsibility

These machines are constructed for maximum operator safety when used under standard
operating conditions and when recommended instructions are followed in the maintenance
and operation of the machine.

All personnel engaged in the use of the machine should become familiar with its operation as
described in this manual.

Proper operation of the machine promotes safety for the operator and all workers in its
vicinity.

Each individual must take responsibility for observing the prescribed safety rules as outlined.
All warning and danger signs must be observed and obeyed. All actual or potential danger
areas must be reported to your immediate supervisor.

Pump Tanks Chapter 1: Safety 6 of 36

Chapter 2: Functional Description

2-1 Models Covered in This Manual

This manual covers many models of cooling tower pump tanks and chilled water pump tanks
with operating capacities of 100 to 6,125 gallons (378 to 23,183 liters). Pump tanks are
designed, specified, and engineered to meet the needs of the process specified at the time of
purchase. Model numbers are listed on the serial tag.

Model numbers start with a CT or CW to describe cooling tower or chilled water tank
configurations. The number following is the approximate capacity up to the overflow of the
tank well(s) and a D at the end indicates a dual well configuration. Additional numbers are
added to signify pump horsepower. For example, a CT1600D-20-20-10 pump tank is a
cooling tower tank, 1,615 gallon (6,113 liter) capacity to its overflow, has dual wells, a 20 hp
process pump, a 20 hp dual standby pump and a 10 hp recirculation pump.

A model number followed by –Q is specially-constructed, and the information in this manual
may not apply. Make sure you know the model and serial number of your equipment before
contacting the manufacturer for parts or service.

2-2 General Description

Single well pump tanks are reservoirs for chilled water and tower cooling water processes.
Process pump(s) deliver water through the chiller or cooling tower as well as through the
process. Dual well tanks have re-circulation pump(s) to deliver water from the hot side to the
chiller or tower. The water then returns to the cold side, where process pump(s) deliver
cooled water directly to process.

Standby pumps may be used as backups for both process and re-circulation during service or
maintenance procedures. Manifolding options provide ease of connection to process and can
ease the transition to standby pumps.

Pump Tanks Chapter 2: Functional Description 7 of 36

2-3 Standard Features

All tower and chilled water pump tanks come standard with the following:

• ODP motors and cast iron impellers on standard pumps

• Centrifugal pump(s) with cast iron housings, cast iron impellers and mechanical seals

• Solid diamond-plate pump ledge

• Standard hardware includes thermometer(s), compound liquid-filled pump pressure

gauge(s) with trim, and drain valve

• Heavy gauge 304 stainless steel construction.

Note: Despite its name, stainless steel is still susceptible to discoloration. A

stainless steel tank will not “rust through” even though the surface of the
metal may appear to be rust colored. This appearance may be caused by
water quality (high chloride content or increased acidity in the water) or
cross contamination from carbon steel dust in the vicinity of the stainless
steel. The integrity of the stainless steel remains in tact even though its
appearance is not perfectly clean.

• Factory-installed insulation and covers (chilled water pump tanks)

• Water strainer basket on cooling tower water pump tank models

• Threaded (up to 3” and flanged 4” and above) overflow opening, return openings

(chilled water pump tanks), and process water return (dual-well cooling tower pump
tanks)

• 1” automatic water makeup valve for “hands-off” level control

• 1/2” opening for field-installed thermometer

• 2” valved drain connection

• Twin 1/2” plugged openings for sight glasses

• Six 1/2” plugged openings with brackets for optional/future thermostats

• Baffles and sidewall reinforcements on larger models

• Full-size pump trim for maximum efficiency including butterfly valve (less handle)

and reducer (if necessary) on the suction side; increaser, check valve and butterfly
valve (less handle) on the discharge side

• One year warranty on parts and labor (labor in North America only)

Pump Tanks Chapter 2: Functional Description 8 of 36

2-4 Optional Features

All cooling tower and chilled water pump tanks are available with the following:

• Standby pump

• Frame reinforcement for supporting other equipment

• Special paint

• Mild steel well and fittings (divider if applicable)

• Second pump ledge

• Support legs

• OSHA handrail and ladder

• Thermostat and thermowell

• Extra thermostats and plugged 1/2” NPT thermostat openings

• High- and/or low-temperature alarm

• High- and/or low-pressure alarm

• High- and/or low-level alarm

• No flow alarm

• Re-circulating (P2) pump (standard on dual well tanks)

• Dual duty (P3) standby pump with isolation valving

• Additional plugged or valved openings

• Clayton float valve

• Discharge manifold with process and re-circulation pump standby butterfly valving

• NEMA 1 pump starter(s), mounted or un-mounted

• NEMA 12-rated central control panel

• Protection for outdoor installation

Chilled water pump tanks are also available with:

• Automatic pressure regulating bypass valve for single well tanks; assures full flow

through the chiller evaporator

Cooling tower water pump tanks are also available with:

• Insulation

• Cover

Pump Tanks Chapter 2: Functional Description 9 of 36

Chapter 3: Installation

3-1 Uncrating Your Pump Tank

Caution! Due to the size and weight of larger model pump tanks, the manufacturer

recommends using bonded professional millwrights to unload and move larger
pump tanks.

Rig the pump tank from the frame only and use spreader bars to prevent load transfer to any
pump tank components. Rig the frame from at least four points and balance the load before
lifting to clear the skid.

3-2 Installation Location Considerations

Consider the following points when locating your pump tank:

• Locate close to the chillers and/or cooling towers and the process itself to minimize

field piping expense

• Locate adjacent to drain and city water sources

• Consult a structural engineer to assure that the floor, mounting pad, or structural steel

support is of adequate strength

3-3 Rigging

Due to the large size and weight of the pump tanks, we recommend professional rigging and
installation. We have a nationwide installation organization that can install your system.

Do not remove the base skid until the unit is at the final location. Lower the unit (do not drop
it) from any truck, platform, or shipping dock.

All 150 through 400 Series pump tanks are provided with lifting lugs on the pump tank
frame. All 500 Series and larger tanks are provided with lifting lug brackets on the pump tank
body. When lifting, use adequately rated hoist, lifting straps and/or chains. Avoid transferring
the load to the pumps and any other components.

Metal pump tanks are provided with slots in the frame for use with fork trucks of sufficient
capacity and properly sized forks.

Pump Tanks Chapter 3: Installation 10 of 36

3-4 Installing Separate Tank Ledge Models

Pump tanks from the 2000, 2700, 3700, and 5100 Series are a two-component design with
separate tank and pump ledge assemblies.

These models include a hardware package and assembly drawing located in the information
packet. The tank and pump ledge were temporarily joined together at the factory, so all
components should line up properly in the field.

General guidelines for installation are the following:

• Two-piece models are not designed to be lifted as a unit. Fully and separately support

both tank and ledge assemblies when they are moved.

• Providing a level area for the tank installation will simplify reconnecting the pump

ledge to the tank.

• Floor mounted tanks and ledges are joined together with support plates and the pump

trim. Gravity and mass provide most of the structural integrity.

• Leg-mounted tanks and ledges are joined together with support plates, the pump trim,

and bolts between the facing surfaces of the tank and ledge. Typically, the tank
assembly is lifted and mounted on the four legs first, then the pump ledge is lifted with
a fork truck, and the two remaining legs are attached. Use the center leg bolt holes and
the facing surface bolts to bring together and align the ledge and the tank. See
assembly drawings on pages 28-30for detailed instructions.

• Butterfly valves bridge the gap between the ledge and tank flanges. These butterfly

valves may be shipped loose or mounted to the pump suction connection to the tank.

• The flanges may not always line up as expected due to the tendency of the metal to

move as it cools. Extra effort may be required to help align the flanges to bring the
tank sections together properly.

Caution! Improper handling may also cause movement of the flanges. Be sure the lifting

lugs or forklift holes are used for moving the tank and base. Do not use any of
the piping as a means of moving the equipment into position.

3-5 Installing Optional Equipment

See pages 28 to 32 in the Appendix for assembly details for the tank legs, ladder, and sight
glass.

3-6 Making Electrical Connections

Supply electricity of the voltage, phase, and cycle listed on the serial tag. Pump motor voltage
must be within plus or minus ten percent of the nameplate voltages.

Pump Starters. Pump motor starters may be pre-mounted, shipped loose, or not provided,
depending on the options specified on the order.

On/Off Selector Switch. All pump starters are supplied with an on/off selector switch on the
starter enclosure cover.

Pump Tanks Chapter 3: Installation 11 of 36

3-7 Making Piping Connections

Piping systems vary with process application and pump tank configuration. Typical system
configurations are available in the Appendix, but the details may or may not apply to your
application. Refer to Figure 1 on page 13 for pipe sizing guidelines. Piping systems must be
designed by a person knowledgeable in piping system design and configuration. Our
contracting department can design and install a piping system tailored to your process.

All process piping returning to the pump tank must be equipped with an inverted trap with a
vacuum breaker at the high point of the system to prevent mains from siphoning into the
pump tank.

Run mains full size in order to reduce pressure drop in the system and provide maximum
pressures at the ends of the mains.

Caution! Do not support piping from the tank or from pumps. Do not weld piping or

piping supports to the tank, as epoxy coating on some tank models can be
damaged.

Caution! Customer is responsible for converting connections to metric sizes as needed.

Pump Tanks Chapter 3: Installation 12 of 36

Figure 1: Pipe Sizing Guide

Pipe Size Flow-Steel Pipe Flow-PVC Pipe

1/2 2 2
3/4 5 5

1 10 10
1 1/4 20 20
1 1/2 30 30

2 50 55
2 1/2 100 100

3 160 160

4 320 320

6 900 1000

8 2000 2100

10 3500 3700
12 5000 5800

Pipe Sizing Guide

Based on 10’ head loss/100’ of pipe (new pipe) — open piping systems. A safety factor of 15
to 20% should be added based on local conditions.

Pump Tanks Chapter 3: Installation 13 of 36

Tower Tank Piping Connections

Return From Process (Single Well). Connect process return piping to the cooling tower
inlet with appropriate balancing valves and gauges. Size this line to the tower flow rate.

Return From Process (Dual Well). Connect process return piping to the hot well. Size
piping to the process flow rate.

Re-circulation Pump Discharge (Dual Well). Connect to the cooling tower inlet with
appropriate balancing valves and gauges. Size according to the pump discharge rate.

Return From Tower. The return from the tower outlet enters the pump tank from above and
terminates above the water level at the water strainer basket location directing flow through
the basket. Cut the end of the line at a 45º angle.

Makeup. Connect a 1” (approximately 25 mm) water line from a city water source to the
makeup inlet to maintain the water level in the pump tank. City water pressure should not
exceed 30 psi pressure. Check local codes. Backflow preventer may be required.

Overflow. Connect the overflow outlet to an approved, trapped drain to permit excess water
in the pump tank to overflow to the drain. Size the overflow line according to the size of the
pump tank. (Consult specifications on page 21.)

To Drain. Connect this outlet to a 2” (approximately 51 mm) line leading to an approved,
trapped drain.

Process Pump Discharge. Connect the pump discharge to the process water supply main.
Size the pipe to the pump discharge rate to the tower.

Pump Tanks Chapter 3: Installation 14 of 36

Chilled Water Piping Connections

Process Pump Discharge (Single Well). Connect process pump discharge to the chiller
evaporator water inlet. Size to the chilled water flow rate. Chiller evaporator inlet and outlet
should have valves and temperature and pressure gauges. Outlet of the evaporator is
connected to the chilled process water supply.

Process Pump Discharge (Dual Well). Connect directly to the chilled water process supply.
Size according to process flow requirements.

Return (Single Well). Connect the chilled water returning from the process to the pump tank
threaded return inlet. Size this line according to the chilled water flow rate.

Makeup. Connect a 1” (approximately 25 mm) water line from a city water source to the
makeup inlet to maintain the water level in the pump tank.

Overflow. Connect the overflow outlet to an approved, trapped drain to permit excess water
in the pump tank to overflow to the drain. Size the overflow line according to the size of the
pump tank. (Consult specifications on page 23.) Do not connect to draw if glycol is used in
the system.

To Drain. Connect to a 2” (approximately 51 mm) line leading to an approved, trapped drain.
Do not connect to draw if glycol is used in the system.

Bypass (Single Well). Optional: recommended on single pump systems. Pipe full size to the
pressure-regulating valve from the evaporator outlet to allow flow if process does not require
flow, to ensure proper flow through the evaporator at all times.

3-8 Initial Start-up

• Remove all tools, foreign matter and debris from the pump tank reservoir and piping.

• Complete all piping leading to and from the pump tank. Observe all applicable codes.

• Complete all electrical wiring. Observe all applicable codes.

• Prepare all related equipment in the system for operation.

• Leak check piping. Flush and clean system.

Pump Tanks Chapter 3: Installation 15 of 36

Chapter 4: Operation

4-1 Start-up

1. Close the drain line at the bottom of the pump tank.

2. Open the 1” makeup water valve and allow the tank to fill until the automatic float

valve shuts off. Adjust the float level so the standing water level is 16” from the top
of the tank, 12” on 150 Series pump tanks. Some tower systems may require a lower
level to allow for drawback from the cooling towers.

3. Check all wiring integrity, field installed controls and voltage.

4. Verify pump motor rotation: should be clockwise from the motor end.

5. Open all pump suction valves fully and lock down.

6. If the process piping is not full of water, close the discharge valves of a process pump

and start that pump. Open the discharge valve very slowly to fill the system. Do this
very slowly to prevent the piping from shaking resulting in possible breakage. When
piping is full, the discharge valve can be left fully open, if the pump is a non­overloading pump. Follow the same procedure for the other process pumps.

7. Repeat step 6 for re-circulating pumps. Leave pump discharge valve(s) fully open.

Throttle the valves for proper flow and pressure drop. Lock down and mark valve(s)
when complete. (On metal towers, throttle the pump for the flow rate and balance the
valves on the hot basin(s) for proper depth.)

4-2 Determining Flow Rate

1. Close the gauge cock leading to the pump suction side, and open the gauge cock

leading to the pump discharge.

2. Start the pump and make note of the discharge pressure in psi (kPa/bars).

3. Check the pump curve (See page 25) for the appropriate sample curve discharge

pressure in psi (kPa/bars).

4. Project this point down to find the flow in gpm (lpm).

Pump Tanks Chapter 4: Operation 16 of 36

4-3 Stand-by Pump Usage

All stand-by pumps should be checked intermittently to make sure they are operational for
when they may be required for usage.

Single Stand-by pump:

1. Open the suction valve fully and lock down.

2. Open the discharge valve slowly until it is equal to the pump it will be replacing.

3. Shut down the pump being replaced and make sure the suction and discharge valves

are fully closed.

Dual Stand-By Pump

1. Open the discharge manifold valve on the proper side of the divider for the

pump being replaced. Be sure the opposite discharge manifold valve is fully
closed.

2. Open the suction valve on the proper side of the divider for the pump being

replaced. Be sure the opposite suction valve is fully closed.

3. Open the discharge valve slowly until it is equal to the pump it will be

replacing.

4. Shut down the pump being replaced and make sure the suction and discharge

valves are fully closed.

4-4 Shut-down

1. Prepare all process and related equipment for shutdown.

2. Shut down all pumps

3. Close the water makeup valve.

4. If you are draining the system, open the 2” drain valve.

Pump Tanks Chapter 4: Operation 17 of 36

Chapter 5: Maintenance

5-1 Preventative Maintenance

Water Treatment

Control of slime, algae, and bacteria growth is extremely important. Cooling towers and
reservoir pump tanks are superb environments for microorganism growth. Warm water,
organic debris, and air encourage bacterial growth. Treat your system with chemicals
(microbiocides) to control microorganism growth.

Caution! Uncontrolled microorganism growth causes system problems such as fouling

and corrosion, and can spread bacterially-transmitted diseases.

You must reduce slime growth and bacterial contamination to eliminate disease-causing
bacteria.

Properly used, environmentally approved microbiocide controls system bacteria. Chemical
treatments must be regularly monitored by qualified personnel.

The manufacturer strongly recommends use of EPA-registered microbiocides on a regular
basis. We do NOT recommend use of chlorine or backyard swimming pool chemicals.
Permitting the discharge of such chemicals into a city sewer may violate local, state, and/or
federal laws.

We offer a full-service water treatment program including chemicals, dispensing equipment,
automatic bleed-off, and monthly water analysis. Contact the Parts and Service department
for more information.

Lubricating Pump Motors and Seals

Some pump motors require greasing; use a high grade ball and roller bearing grease such as
Shell Dolium R or Chevron SR1. Motors with regreasable bearings are shipped with a high
quality, wide temperature range grease.

Caution! Pump seals require water for lubrication, so the pumps must never be run dry

or be dead headed.

Always fill the tank before attempting to operate the pumps. Seal failures usually result from
running the pump dry.

Maintaining Makeup Valve Assemblies

Periodically inspect the water makeup valve assembly for proper operation. If the valve no
longer shuts off completely or reliably, replace it. Make sure that the plastic ball float is
buoyant for proper operation.

Pump Tanks Chapter 5: Maintenance 18 of 36

Chapter 6: Appendix

6-1 Technical Assistance

Parts Department

Call toll-free 7am–5pm CST [800] 423-3183 or call
The ACS Customer Service Group will provide your company with genuine OEM quality parts

manufactured to engineering design specifications, which will maximize your equipment’s performance
and efficiency. To assist in expediting your phone or fax order, please have the model and serial
number of your unit when you contact us. A customer replacement parts list is included in this manual
for your convenience. ACS welcomes inquiries on all your parts needs and is dedicated to providing
excellent customer service.

Service Department

Call toll-free 8am–5pm CST [800] 423-3183 or call [262
Emergencies after 5pm CST, call [847] 439-5655

We have a qualified service department ready to help. Service contracts are available for most of our
products. www.acscustomerservice.com

Sales Department

Call [262] 641.8610 Monday—Friday, 8am—5pm CST, fax [262] 641-8653
Our products are sold by a world-wide network of independent sales representatives. Contact our

Sales Department for the name of the sales representative nearest you.

Contracting Department

Call [262] 641-8610 Monday—Friday, 8am—5pm CST
Let us install your system. The Contracting Department offers any or all of these services: project

planning; system packages including drawings; equipment, labor, and construction materials; and union
or non-union installations.

Sterling, Inc.

5900 S. 160

New Berlin, WI 53151

www.sterlco.com

[262]

641-8610, Fax [262] 641-8653

] 641

-8610

th

Street

Pump Tanks Chapter 6: Appendix 19 of 36

6-2 Remote Starters and NEMA Panels

Pump tanks can be provided with electrical controls such as basic motor starters or elaborate
NEMA panels.

Motor starters or NEMA panels can be shipped loose for field installation or pre-mounted for
space saving convenience. Motor starters are equipped with on/off selector switches for
turning the pump on with overload relays to protect the motor when operating. On tower
systems, re-circulating pump and tower fan motor starter are also provided with thermostats
for proper temperature. The chiller provides the temperature control on chilled water
systems.

All starters require a 120-volt power source for the control circuit.

NEMA Panel Standard Features

The NEMA panel is a properly sized enclosure to house all the starters required for each
pump tank system. A control circuit transformer is also provided to create the 120 volt
control circuit needed for starters and thermostats. A power distribution block is provided to
bring in main power to the panel. All internal wiring is provided and selector switches and
indicator lights are provided on the NEMA panel door with labels to indicate each device.

NEMA Panel Options

Each panel can be customized beyond the basic setup. A list of some of the possible additions
are as follows:

• Alarm circuitry with horn and strobe light

• High temperature alarm

• Low pressure alarm

• High pressure alarm

• Low flow alarm

• Low level alarm

• High level alarm

• Digital temperature display

• Amp meters

• Hour meters

• Digital flow meters

• UL panel

• Automatic water make-up

• Variable speed systems

Pump Tanks Chapter 6: Appendix 20 of 36

6-3 Drawings and Specifications

Cooling Tower Water Pump Tanks

Top View

American Standards

Maximum Return Tank weight
tower tons c Capacity Maximum water &

Model Single Dual gallons pumps/ connections inches pounds

number well well Overflow Operating ledge Inches L W H Shipping Operating

CT140 (D) 25 13 125 100 3 3” NPT 72 36 40 600 1,800
PT390 (D) d
CT480 (D) 90 45 450 360 3 4” FLG 102 49.5 52 2,000 6,000
CT720 (D) 135 68 675 540 4 4” FLG 114 73.5 52 2,600 8,600
CT1080 (D) 206 103 1,030 900 4 6” FLG 114 73.5 77 3,400 12,400
CT1620 (D) 310 155 1,550 1,345 4 6” FLG 138 73.5 77 4,000 17,500
CT2040 (D) 382 191 1,910 1,685 5 6” FLG 150 91 78 5,000 22,100
CT2700 (D) 509 225 2,545 2,245 6 6” FLG 150 121 78 6,000 28,500
CT3670 (D) 698 349 3,490 3,140 6 6” FLG 162 121 90 7,000 37,600
CT5130 (D) 978 489 4,890 4,400 7

CT6285 (D) 1,257 629 6,285 5,655 9

c Based on three (3) gpm per ton and towers being within 25 feet of the tank.
d “P” signifies molded polyethylene tank.

ℜ PT390 = 6” CLMP, CT5130 = 6” FLG, CT6285 = 8” FLG overflow connections only.

Metric Standards

Maximum Return Tank weight
tower cooling c Capacity Maximum water &

Model Single Dual liters pumps/ connections cm Kg

number well well Overflow Operating ledge mm L W H Shipping Operating

CT140 (D) 94,615 49,200 473 378 3 76 mm 183 91 102 273 817
PT390 (D) d
CT480 (D) 340,619 170,303 1,703 1,362 3 102 mm 259 126 132 908 2,722
CT720 (D) 510,921 257,353 2,555 2,044 4 102 mm 289 187 132 1,180 3,901
CT1080 (D) 779,628 389,814 3,899 3,407 4 152 mm 289 187 195 1,543 5,625
CT1620 (D) 1,173,195 586,613 5,867 5,091 4 152 mm 350 187 195 1,815 7,938
CT2040 (D) 1,445,717 722,859 7,229 6,378 5 152 mm 381 231 198 2,268 10,025
CT2700 (D) 1,926,361 965,073 9,633 8,497 6 152 mm 381 307 198 2,722 12,928
CT3670 (D) 2,641,651 1,320,825 13,209 11,885 6 152 mm 411 307 229 3,176 17,056
CT5130 (D) 3,701,339 1,850,669 18,509 16,654 7
CT6285 (D) 4,757,242 2,380,513 23,789 21,404 9

c In Kcal/hr, calculated for cooling tower water, based on 3 lpm per 1,000 Kcal/hr and towers being within eight (8) meters of the

tank.
d “P” signifies molded polyethylene tank.
ℜ PT390 = 152mm, CT5130 = 152mm, CT6285 = 203mm overflow connections only.

78 39 390 350 3

295,200 147,599 1,476 1,325 3

Front View

ℜ 5” CLMP

ℜ 10” FLG

(P2 Pump Shown On ly Fo r Cl ar i ty )

overflow

ℜ 8” FLG

overflow

ℜ 127 mm

ℜ 203 mm
ℜ 254 mm

Side View

Dimensions (less pumps)

95 56 64 500 3,500

162 169 92 7,800 50,700
162 217 94 14,700 69,100

Dimensions (less pumps)

241 142 162 227 1,588

411 429 234 3,539 22,998
411 551 239 6,668 31,344

Pump Tanks Chapter 6: Appendix 21 of 36

Figure 2: Standard Pumps and Trim Based on Cooling Tower Capacities

(Flow Based on 3 gpm per Ton)

American Standards

Capacity Trim Process Recirculating

Nominal Nominal flow size pump pump

cooling tower tons gallons inches hp hp

20 60 2½” 5 3
30 90 2½” 7½ 3
40 120 3” 7½ 5
50 150 3” 10 5
60 180 4” 10 5
75 225 4” 15 7½

80 240 4” 15 7½
100 300 4” 20 7½
125 375 6” 20 10
150 450 6” 25 10
175 525 6” 30 15
200 600 6” 30 15
250 750 6” 40 20
300 900 6” 50 20

Pump horsepower 1½ 3 5 7½ 10 15 20 25 30 40 50 60

Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Shipping weight (lbs.) • P1

• P2

Trim size (inches) 2 2½ 3 4 6 8

Maximum flow (gpm) 50 90 160 320 900 2,000
Shipping weight (lbs.) 25 35 50 75 120 165

— 95 115 125 165 180 300 310 400 465 710 730

60 90 115 275 320 425 510 630 670 — — —

Metric Standards

Capacity Trim Process Recirculating

Nominal refrigeration Nominal flow size pump pump

Tower water, Kcal/hr liters mm Dia. hp kW hp kW

75,600 227 64 5 3.73 3 2.24
113,400 341 64 7½ 5.59 3 2.24
151,200 454 76 7½ 5.59 5 3.73
189,000 568 76 10 7.50 5 3.73
226,800 682 102 10 7.50 5 3.73
283,500 852 102 15 11.19 7½ 5.59
302,400 909 102 15 11.19 7½ 5.59
378,000 1,135 102 20 14.91 7½ 5.59
472,500 1,419 152 20 14.91 10 7.50
567,000 1,703 152 25 18.64 10 7.50
661,500 1,987 152 30 22.37 15 11.19
756,000 2,271 152 30 22.37 15 11.19
945,000 2,839 152 40 29.93 20 14.91

1,134,000 3,406 152 50 37.29 20 14.91

Pump
horsepower/kW

Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Ship weight (Kg) • P1

• P2

Trim size (inches) 2 2½ 3 4 6 8

Maximum flow (lpm) 189 340 624 1,211 3,406 7,570
Shipping weight (Kg) 12 16 23 35 55 75

1½/1.12 3/2.24 5/3.73 7½/5.59 10/7.5 15/11.19 20/14.91 25/18.64 30/22.37 40/29.93 50/37.29 60/44.7

4

— 44 53 57 75 82 137 141 182 211 323 332

28 41 53 125 146 193 232 286 304 — — —

Pump Tanks Chapter 6: Appendix 22 of 36

Chilled Water Pump Tanks

Top View Front View

(P2 Pump S hown Only For Clarity)

American Standards

Side View

Maximum tons Return Tank weight
chilled H2O c Capacity Maximum water &

Model Single Dual gallons Pumps/ Connections inches pounds

number well well Overflow Operating Ledge inches L W H Shipping Operating

CW140 (D) 47 23 125 110 3 3” NPT 72 36 40 600 1,800
PC390 (D) d
CW480 (D) 175 87 450 420 3 4” FLG 102 49.5 52 2,000 6,000
CW720 (D) 262 131 675 630 4 4” FLG 114 73.5 52 2,600 8,600
CW1080 (D) 411 206 1,030 990 4 6” FLG 114 73.5 77 3,400 12,400
CW1620 (D) 617 309 1,550 1,480 4 6” FLG 138 73.5 77 4,000 17,500
CW2040 (D) 771 386 1,910 1,850 5 6” FLG 150 91 78 5,000 22,100
CW2700 (D) 1,029 514 2,545 2,470 6 6” FLG 150 121 78 6,000 28,500
CW3670 (D) 1,418 709 3,490 3,405 6 6” FLG 162 121 90 7,000 37,600
CW5130 (D) 1,985 993 4,890 4,765 7
CW6285 (D) 2,553 1,276 6,285 6,125 9

c Based on 2.4 gpm per ton.
d “P” signifies molded polyethylene tank.

ℜ PC390 = 6” CLMP, CW5130 = 6” FLG, CW6285 = 8” FLG overflow connections only.

146 73 390 350 3

overflow

ℜ 5” CLMP

ℜ 8” FLG

ℜ 10” FLG

Dimensions (less pumps)

95 56 64 500 3,500

162 169 92 7,800 50,700
162 217 94 14,700 69,100

Metric Standards

Maximum cooling, Return Tank weight
chilled H2O c Capacity Maximum water &

Model Single Dual liters pumps/ connections cm Kg

number well well Overflow Operating ledge mm L W H Shipping Operating

CW140 (D) 177,876 87,046 473 416 3 76 mm 183 91 102 273 817
PC390 (D) d
CW480 (D) 662,305 329,260 1,703 1,590 3 102 mm 259 126 132 908 2,722
CW720 (D) 991,565 495,783 2,555 2,385 4 102 mm 289 187 132 1,180 3,901
CW1080 (D) 1,555,471 779,628 3,849 3,747 4 152 mm 289 187 195 1,543 5,625
CW1620 (D) 2,335,098 1,169,441 5,867 5,602 4 152 mm 350 187 195 1,815 7,938
CW2040 (D) 2,917,927 1,460,856 7,229 7,002 5 152 mm 381 231 198 2,268 10,025
CW2700 (D) 3,894,353 1,945,284 9,633 9,349 6 152 mm 381 307 198 2,722 12,928
CW3670 (D) 5,366,263 2,683,281 13,209 12,888 6 152 mm 411 307 229 3,176 17,056
CW5130 (D) 7,512,431 3,758,108 18,509 18,036 7
CW6285 (D) 9,662,084 4,829,150 23,789 23,183 9

c In Kcal/hr, calculated for chilled water, based on 3 lpm per 1,000 Kcal/hr.
d “P” signifies molded polyethylene tank.

ℜ PC390 = 152mm, CW5130 = 152mm, CW6285 = 203mm overflow connections only.

552,552 276,276 1,476 1,325 3

overflow

ℜ 127 mm

ℜ 203 mm
ℜ 254 mm

Dimensions (less pumps)

241 142 162 227 1,588

411 429 234 3,539 22,998
411 551 239 6,668 31,344

Pump Tanks Chapter 6: Appendix 23 of 36

Figure 3: Standard Pumps and Trim Based on Chiller Capacities

(Flow based on 2.4 gpm per ton)

American Standards

Capacity Trim Process Recirculating

Nominal Nominal flow size pump pump

refrigeration tons gallo ns inches hp hp

25 60 2½” 5 3
35 84 2½” 7½ 3
50 120 3” 7½ 5
60 144 3” 10 5
75 180 4” 10 5

90 216 4” 15 7½
100 240 4” 15 7½
125 300 4” 20 7½
155 372 6” 20 10
185 444 6” 25 10
220 528 6” 30 15
250 600 6” 30 15
310 744 6” 40 20
375 900 6” 50 20

Pump horsepower 1½ 3 5 7½ 10 15 20 25 30 40 50 60

Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Shipping weight (lbs.) • P1 — 95 115 125 165 180 300 310 400 465 710 730

• P2 60 90 115 275 320 425 510 630 670 — — —

Trim size (inches) 2 2½ 3 4 6 8

Maximum flow (gpm) 50 90 160 320 900 2,000
Shipping weight (lbs.) 25 35 50 75 120 165

Metric Standards

Nominal refrigeration, Nominal flow size pump pump

chilled water, Kcal/hr liters mm dia. hp kW hp kW

75,600 227 64 mm 5 3.73 3 2.24
105,840 318 64 mm 7½ 5.59 3 2.24
151,200 454 76 mm 7½ 5.59 5 3.73
181,440 545 76 mm 10 7.50 5 3.73
226,800 681 102 mm 10 7.50 5 3.73
272,160 818 102 mm 15 11.19 7½ 5.59
302,400 908 102 mm 15 11.19 7½ 5.59
378,000 1,136 102 mm 20 14.91 7½ 5.59
468,720 1,408 152 mm 20 14.91 10 7.50
559,440 1,680 152 mm 25 18.64 10 7.50
665,280 1,998 152 mm 30 22.37 15 11.19
756,000 2,271 152 mm 30 22.37 15 11.19
937,440 2,816 152 mm 40 29.93 20 14.91

1,134,000 3,407 152 mm 50 37.29 20 14.91

Pump horsepower/kW 1½/1.12 3/2.24 5/3.73 7½/5.59 10/7.5 15/11.19 20/14.91 25/18.64 30/22.37 40/29.93 50/37.29 60/44.7

Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Ship weight (Kg) • P1

• P2

Trim size (mm) 51 mm 64 mm 76 mm 102 mm 152 mm 203 mm

Maximum flow (lpm) 189 340 624 1,211 3,406 7,570
Shipping weight (Kg) 12 16 23 35 55 75

Capacity Trim Process Recirculating

4

— 44 53 57 75 82 137 141 182 211 323 332

28 41 53 125 146 193 232 286 304 — — —

Pump Tanks Chapter 6: Appendix 24 of 36

TOTAL HEAD

KG/

PSI

FEET

2

CM

100

7

220

6.5
90

200

6

80

5.5

180

Process Pump Curves and Specifications

P1 PROCESS PUMP CURVES - 60 CYCLE

5

70

160

4.5

140

60

4

120

50

3.5

100

3

40

2.5

U.S. GALLONS

PER MINUTE

LITERS

PER MINUTE

A0548756

15 HP

10 HP

5 HP

7 1/2 HP

3 HP

100 200 300 400 500 600 700 800 900 1000

500 1000 1500 2000 2500 3000 3500 4000

20 HP

25 HP

30 HP

60 HP

50 HP

40 HP

Pump Information

Pump

Model IMP. hp kW rpm inches lbs. kg lbs. kg

16 5.2” 3 2.24 3,500 2” NPT 95 44 25 12
50 6.0” 5 3.73 3,500 2½” flange 115 53 35 16
52 5.75” 7½ 5.59 3,500 3” flange 125 57 50 23
52 6.5” 10 7.46 3,500 3” flange 165 75 50 23
54F 6.5” 15 11.19 3,500 4” flange 180 82 75 35
55F 6.5” 20 14.92 3,500 4” flange 300 137 75 35
56F 6.3” 25 18.65 3,500 6” flange 310 141 95 44
57 6.4” 30 22.38 3,500 6” flange 400 182 95 44
57 6.87” 40 29.84 3,500 6” flange 465 212 120 55
63 7.5” 50 37.30 3,500 6” flange 710 323 120 55
63 8.2” 60 44.76 3,500 8” flange 730 332 165 75

ℵ Weld slip-on flange sent at discharge termination for flanged trim. 2” terminates at valve connection.

Final discharge

trim size

ℵ

Pump ship

wt.

Trim ship

wt.

Pump Tanks Chapter 6: Appendix 25 of 36

Re-circulation Pump Curves and Specifications

TOTAL HEAD

KG/

PSI

FEET

2

CM

110

45

100

3

40

90

2.5

35

80

70

30

2

60

25

1.5

U.S. GALLONS

PER MINUTE
PER MINUTE

50

20

40

LITERS

1 1/2 HP

P2 RECIRCULATING PUMP CURVES - 60 CYCLE

3 HP

20 HP

5 HP

7 1/2 HP

100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

500 1000 1500 2000 2500 3000

10 HP

15 HP

3500 4000 50004500

25 HP

A0548756

30 HP

Pump Information

Pump

Model IMP. hp kW rpm inches lbs. kg lbs. kg

60 4.6” 1½ 1.19 3,500 2” NPT 60 28 25 12
16 5.2” 3 2.24 3,500 2½” flange 90 41 50 23

17 5.3125” 5 3.73 3,500 3” flange 115 53 75 35
103 8.0” 7½ 5.59 1,750 4” flange 275 125 75 35
104 8.0” 10 7.46 1,750 6” flange 320 146 95 44

95 8.6” 15 11.19 1,750 6” flange 425 193 120 55

96 8.9” 20 14.92 1,750 6” flange 510 232 120 55

96 9.37” 25 18.65 1,750 8” flange 630 287 165 75

96 9.75” 30 22.38 1,750 8” flange 670 305 165 75

Final discharge

trim size

ℵ

Pump ship

wt.

Trim ship

wt.

ℵ Weld slip-on flange sent at discharge termination for flanged trim. 2” terminates at valve connection.

Pump Tanks Chapter 6: Appendix 26 of 36

6-4 Parts List

Recommended Spare Parts

Part number Quantity Description

A0550190 1 Pressure gauge
A0501073 1 Temperature gauge
A0069286 1 (if required) Strainer basket, 12” (approx. 30.5 cm)
A0069285 1 (if required) Strainer basket, 18” (approx. 45.7 cm)
A0102396 1 Float valve, 1” (approx. 25.4 mm)
A0069538 1 Plastic ball float, 6” (approx. 15.2 mm)
A0102394 1 Float rod, 10” (approx. 25.4 cm)

Spare Process Pump Seals and Casing Gaskets

Pump
Model

16 3 2.24 A05100581 A0101975
50 5 3.73 A05100581 A0103509
52 7½ 5.59 A05100581 A0103509
52 10 7.46 A05100581 A0103509
54F 15 11.19 A05100581 A0103509
55F 20 14.92 A05100581 A0103509
56F 25 18.65 A05100581 A0103509
57 30 22.38 A05104591 A0524321
57 40 29.84 A05104591 A0524321
63 50 37.30 A05104591 A0530385
63 60 44.76 A05104591 A0530385

Spare Re-circulating Pump Seals and Casing Gaskets

Pump
Model

60 1½ 1.19
16 3 2.24
17 5 3.73
103 7½ 5.59
104 10 7.46
95 15 11.19
96 20 14.92
96 25 18.65
96 30 22.38

Process pump
power
hp kW Part number Qty Part number Qty

Re-circulating
pump power
hp kW Part number Qty Part number Qty

Pump seals Pump casing gaskets

Pump seals Pump casing gaskets

A0101975
A0100581
A0100581
A0104591
A0104591
A0104591
A0104591
A0104591
A0104591

A0101582
A0101975
A0101975
A0104830
A0104830
A0530386
A0530386
A0530386
A0530386

Pump Tanks Chapter 6: Appendix 27 of 36

6-5 Optional Assembly Detail Drawings

Tank Support Leg Assembly Detail: 4 Legs

Pump Tanks Chapter 6: Appendix 28 of 36

Tank Support Leg Assembly Detail: 6 Legs

Pump Tanks Chapter 6: Appendix 29 of 36

Tank Support Leg Assembly Detail: 7 Legs

Pump Tanks Chapter 6: Appendix 30 of 36

Tank Ladder Assembly Detail

Pump Tanks Chapter 6: Appendix 31 of 36

Sightglass Assembly Detail

Pump Tanks Chapter 6: Appendix 32 of 36

6-6 Typical Piping Diagrams

Typical Single Well Cooling Tower Water Pump Tank Piping System

Overflow

Drain

To sewer

P

Cooling tower

Strainer basket

Cooling tower
fan control
(optional)

T

Single

tower water

reservoir

P-1

P

3/8" drain intended to
prevent tower freeze-up.
Do NOT valve.

3/4" constant bleed

Backflow preventer

(by others)

Makeup

Bypass

Tower process water return

Tower process water supply

Pump Tanks Chapter 6: Appendix 33 of 36

Typical Dual Well Cooling Tower Pump Tank Piping System

y

Overflow

Drain

To drain

P

P

Cooling tower

Strainer basket

Cooling tower fan
control (optional)

Recirc. pump motor

T

Cold side

P-1 P-2 P-3

control (standard)

P

Dual well

tower water

reservoir

3/8" drain intended to
prevent tower freeze-up.

Do NOT valve.

3/4" constant bleed

Hot side

P

P

Backflow preventer

(by others)

T

Makeup

Return

1/4" swing check valve mounted 12"
above highest point in return piping

Bypass

Tower water return
Tower water supply

Standb

Pump Tanks Chapter 6: Appendix 34 of 36

Typical Single Well Chilled Water Pump Tank Piping System

"

1/4" swing check valve located 12
above highest point in return line

Overflow

Backflow preventer

(by others)

Tower water return and supply

P

T

Bypass

Chilled water return
Chilled water supply

P

T

Return

Drain

To container

(by others)

Auto pressure

regulating valve

assembly (optional)

Evaporator

Condenser

Chiller

T

Single chilled

water reservoir

P-1

Makeup

P

Caution! Do not connect city water makeup if glycol is used in the system
Caution! Do not connect to draw if glycol is used in the system. Pipe to catch drum or

overflow tank.

Pump Tanks Chapter 6: Appendix 35 of 36

Typical Dual Well Chilled Water Pump Tank Piping System

"

Overflow

1/4" swing check valve located 12

above highest point in return line

Backflow preventer

(by others)

Tower water return and supply

Bypass

Chilled water return
Chilled water supply

P

T

Return

Drain

To container

(by others)

Dual chilled

water reservoir

T

Cold side

P-1

P

Hot side

P

P-2 P-3

Standby

P

Makeup

T

Return

Evaporator

Condenser

Chiller

Caution! Do not connect city water makeup if glycol is used in the system
Caution! Do not connect to draw if glycol is used in the system. Pipe to catch drum or

overflow tank.

P

T

Pump Tanks Chapter 6: Appendix 36 of 36