RENTALTEMPERATURE

CONTROL PLANNER

COOLING THE LOAD

TEMPORARY COOLING: THE TIME TO PLAN IS NOW.As a facility manager, you know the

importance of temperature control.Well-designed cooling systems keep employeescomfortable and productive as well as maintain process output and efficiency.

If you have short-term cooling needs — for scheduled maintenance shutdowns, forsupplemental cooling during hot weather, forspecial events or for emergencies — properplanning can save you time and money.

Whatever business you’re in, you can use this Rental Temperature Control Planner toidentify the temporary cooling equipment that best suits your operation, and make sure it’s available when you need it.

When planning for emergencies, such as an extended power outage or damage caused by a storm, consider the worst case. By doing so, you’ll make sure you have all the temporarycooling and electrical equipment you need to keep your business running until normaloperations are restored.

Just follow these simple steps and you’ll be ready to run without a hitch when short-term cooling needs arise.

A Rental Power Planner, also available from Cat® Rental, will help you and yoursupplier choose the power generation equipment you need.

STEP 1: DECIDE WHAT KIND OF COOLING EQUIPMENT YOU NEED.Your cooling equipment rental supplier

needs to know what kind of system will serve you best. Short-term temperature controlequipment comes in two basic varieties: fluidcooling and air conditioning.

Fluid cooling applies to industrial processesthat use a heat exchanger or process tank tomaintain the temperature of a liquid.The systemstypically circulate chilled water, or for freezers and sensitive industrial processes, chilled brine

is circulated.Applicationsinclude pulp mills,petrochemical andpharmaceutical plants,breweries, frozen foodfacilities and automobilefactories.

Air conditioninginvolves maintainingtemperature, moisturecontent, air movement andcleanliness of air in a definedspace.Applications includehospitals, restaurants, officebuildings, computer centersand factories, as well asspecial events like weddings,concerts and sportingevents, especially when heldin tents or other temporarystructures.

Another industrialapplication is dense airinjection, a process ofsupplying chilled oxygen-rich air to maintainefficiency in a gas turbine or petrochemical refiningprocess.

STEP 2: CALCULATE THE COOLING LOAD FOR YOUR APPLICATION.

STEP 3: KNOW WHERE TO RENT TEMPERATURE CONTROL EQUIPMENT.Your temporary cooling equipment is only as

good as the supplier who backs it.As part of yourplanning, find a rental equipment supplier whohas the equipment you need and a staff qualifiedto solve your problems and service the machines.Before you choose a supplier, visit the operationand examine the rental cooling equipment.Whileyou are there, ask the following questions:• What is the tonnage or kW range of your

equipment?• What are your delivery lead times? Can you

deliver immediately in an emergency?• What if I need equipment in the middle of the

night or on a holiday?• Who will supply hoses, flanges and ductwork

for the cooling system?• Do you offer temporary power and distribution

equipment?• Do you have experience in my specific industry

or application?• Do you have support staff available to answer

my questions?• Will you have a certified HVAC technician on

site to start up the equipment?

• How is your equipment rated?• What is your service response time?• Can you train my people to operate the equipment?• Can you supply an operator?• How are your rental contracts structured?• Can I obtain pre-approved credit to avoid delay

if I need equipment quickly?• Does your equipment meet all environmental

codes and requirements?

Before you rent temperature controlequipment, you have to know how much capacityyou need. Cooling load is measured in tons(English) or kilowatts (metric). Using theinstructions below, you can help your equipmentsupplier calculate your cooling load.

Fluid cooling applications. This primarilyinvolves chillers, sized by effective tonnage.Yourin-plant chiller probably has its tonnage ratingstamped on the manufacturer’s nameplate. If thatinformation is not available, your supplier cancalculate your cooling load if you provide thefollowing data on your process or system:

• Liquid temperature entering the application.• Liquid temperature leaving the application.• Flow rate of liquid (gallons per minute).

Air conditioning applications. Theseinstallations typically use self-contained airconditioning units, or air handling units inconjunction with chillers.To calculate the chiller tonnage required for your space, yoursupplier needs to know:• Size of the space to be cooled (square feet and

height of structure).• Space temperature and relative humidity desired.• Expected ambient temperature and expected

relative humidity outside.• Number of people present.• Kind of activity being performed.• Type of structure and insulation.• Heat-producing equipment used in the space.• Air exchange requirement (if known).

You can record this information on theaccompanying worksheets.

NOTE: If you need temporary electric powerfor your cooling equipment, a good rule ofthumb is to plan for 1.5 kW of power per ton ofcooling capacity.Your rental supplier can helpyou accurately plan your power needs.

Before you have a need for temporarycooling, think carefully about the logistics. If youdo, you will be able to get yourrental equipment on-line in theshortest possible time. Consider:

How will the equipmentget from the dealer to yourlocation? Most suppliers deliver,but if you pick up the equipmentyourself, you must know theequipment’s weight and whatsize truck or trailer you will need.

Where will you put thetemperature controlequipment? The largest chillermodules are 8 feet wide, 40 feetlong and 13.5 feet high.Theyrequire 8 feet of clearance oneach side for proper airflow andservice accessibility.Theequipment must rest on a level,stable surface such as concrete, asphalt or hard-packed gravel. Buckled, broken or otherwiseuneven surfaces may require leveling.

If your application calls for airconditioning, how will you duct the air intoyour building or other structure? Considerdoors, windows, outside air-intake louvers, or anyopening into the defined space. If possible, find anopening that provides easy access to your existingair handling system. For tents and other

temporary structures, your rental supplier canprovide necessary ductwork.

If your application calls for fluidcooling requiring rental chiller modules,how will you route and connect temporarypiping to your system? If you have noconnections for temporary equipment, considerwhere to place them for easiest access in caseyour in-plant system should fail. Considerinstalling alternate flanged “T” connections in yourpiping system, with two-way valves to routetemporary water flow to a rental chiller.

Where can I get temporary hoses,pumps, valves andflanges for my applica-tion? Your local rental sup-plier will be able to providethese accessories, or referyou to someone who can.

What happens if Ineed temporary powerand rental coolingequipment? Considerchoosing a supplier whooffers both cooling equip-ment and temporarypower, with completetechnical support forboth. By working withone supplier, you will savetime and money and ensuresmooth operation through-out your rental period.

STEP 4: ANSWER THE BASICS, SAVE TIME AND MONEY.

CAT RENTAL: YOUR SINGLE SOURCE FOR COOLING EQUIPMENT RENTAL.Your local Cat Rental dealer can provide all

the equipment, technical support and services youneed to plan a successful, profitable temporarycooling project. Cat Rental staff can engineer yoursystem in advance, so you get up and runningquickly — saving time and money.Your dealer canarrange for mechanical and electrical contractorsto visit your site and ensure compliance withsafety and code requirements.As for equipment,Caterpillar and York International Corporation, aworld leader in industrial and commercial cooling,have jointly designed rental temperature controlproducts to exceed rental industry standards.Technicians trained by York International areavailable on site through your Cat Rental dealer to support your installation around the clock.

ChillersCat Rental offers mobile, air-cooled chillers

with capacity ratings of 150 tons, 300 tons and450 tons.All are self-contained units, completewith water pump and standard connections thatmake hook-up to your system fast, easy andflexible. Here are some key features:• Cat chiller modules are packaged in

weatherized trailer enclosures (ISO containers)for safe shipment on ships or highway.You can install the chassis-mounted equipmentwithout cranes or forklift trucks, thus savingtime and expense.

• Pumps, triple-duty valves and suction strainersare included in chiller module packages andrental rates, reducing “after the order” expenses.

• All Cat® chiller modules containYork® Millenium chillers.Aircooling eliminates costs for water treatment, cooling-towerinspections and additionalpiping.Water-cooled systems are available for energy-sensitiveapplications.

• Chillers come equipped withlarge, variable-flow water pumps to accommodate a wide range of needs.

• Chillers include YorkMicroComputer controls forhands-free starting and stopping.

• Each package includes a Catmotor control center withdisconnect switches. Full NEC or CE code compliance is guaranteed.

• A York International service technician provides chiller module start-up.York alsoextends full emergency service to Cat Rental Power dealers to ensure unitperformance and full customer satisfaction.

Air handling units and self-containedair conditioning units

Cat Rental supplies packaged air conditioningunits for applications requiring under 100 tons(360 kW) capacity or less, and air handlingsystems can be combined with chillers to achieveunlimited cool air production.• All Cat cooling units are engineered by York

International and Caterpillar for the specificpurpose of rental durability.

• All units contain multiple air supply and return connections for on-the-job flexibility.

• Units include variable frequency drives toenable adjustments in airflow to suit theapplication. Smaller units utilize adjustable inlet guide vanes.

• York control panels allow easy operation with industrial reliability.

• Washable filter racks save labor andreplacement filter costs.

• Double-wall construction with insulation on air handling units reduces noise foremployee/guest comfort and compliance with noise ordinances and regulations.

• Each unit also contains heating elements to provide precise temperature control inheating and cooling applications.

COOLING LOAD CALCULATIONIf you do not know your cooling load, the following information will help your CatRental dealer calculate your load and your cooling equipment needs:

Fluid cooling applications English MetricLiquid temperature entering process _____ °F _____ °CLiquid temperature leaving process _____ °F _____ °CFlow rate of process liquid _____ gpm _____ L/sPercent brine content (if applicable) _____ % _____ %Pressure loss through chilled water system _____ psi _____kPaOutside air temperature _____ °F _____ °C

Air Conditioning ApplicationsSize of space to be cooled _____ ft2 _____ m2

Height of space _____ ft _____ mSpace temperature desired _____ °F _____ °CHumidity desired _____ % _____ %Expected temperature outside _____ °F _____ °CExpected relative humidity outside _____ % _____ %Number of people in structure _____ _____Type of structure and insulation (e.g., masonry, wood-frame, pole building, tent)_____________________________________________________________________

Activity of people in structure (Describe briefly what people will be doing,e.g., office/clerical, light manufacturing, heavy physical labor, maintenance, eventspectators, dancing) ___________________________________________________

Equipment used in structure (List equipment that contributes significant heat, e.g., computers/electronics, intense incandescent lighting, industrial vehicles/forklifts, industrial processes) ____________________________________

_____________________________________________________________________

NOTE: When estimating outdoor conditions, plan for the highest temperature andhumidity likely to occur during the term of the rental.This will ensure your rentalequipment is sized for the most taxing conditions.

Conversion FormulasThe following factors can be used to convert from English to the most common SIMetric values.

MEASUREMENT MULTIPLY THIS ENGLISH VALUE BY TO OBTAIN THIS METRIC VALUE

Capacity Tons Refrigerant Effect (ton) 3.516 Kilowatts (kW)

Power Kilowatts (kW) No Change Kilowatts (kW)Horsepower (hp) 0.7457 Kilowatts (kW)

Flow Rate Gallons/Minute (gpm) 0.0631 Liters/Second (L/s)

Length Feet (ft) 304.8 Millimeters (mm)Inches (in) 25.4 Millimeters (mm)

Weight Pounds (lb) 0.4536 Kilograms (kg)

Velocity Feet/Second (fps) 0.3048 Meters/Second (m/s)

Pressure Drop Feet of Water (ft) 2.090 Kilopascals (kPa)Pounds/Sq. Inch (psi) 6.895 Kilopascals (kPa)

Volume Square Feet (ft2) 0. 09289 Square Meters (m2)

English – English Conversions1 ton = 12,000 BTU per hour 1 psi = 2.31 Feet Water Column

Formulas - English1. Tons = GPM x (Ti - To)

24

GPM = Gallons per minute to applicationTi = Temperature of water from applicationTo = Temperature of water to application

2. BTU per hour = CFM x 1.08 x (Ti - To)

BTU per hour = British Thermal Units per hourCFM = Cubic Feet Per Minute AirflowTi = Temperature of air from applicationTo = Temperature of air to application

°F °C0 -181 -172 -173 -164 -165 -156 -147 -148 -139 -1310 -1211 -1212 -1113 -1114 -1015 -916 -917 -818 -819 -720 -721 -622 -623 -524 -425 -4

°F °C26 -327 -328 -229 -230 -131 -132 033 134 135 236 237 338 339 440 441 542 643 644 745 746 847 848 949 9

°F °C50 1051 1152 1153 1254 1255 1356 1357 1458 1459 1560 1661 1662 1763 1764 1865 1866 1967 1968 2069 2170 2171 2272 2273 2374 2375 24

°F °C76 2477 2578 2679 2680 2781 2782 2883 2884 2985 2986 3087 3188 3189 3290 3291 3392 3393 3494 3495 3596 3697 3698 3799 37100 38

TEMPERATURE CONVERSION CHARTFAHRENHEIT TO CELSIUS

(Celsius temperatures shown arerounded to the nearest degree)

To convert any Fahrenheit temperature not shown to aCelsius temperature, subtract 32° and multiply by 0.5556.To convert a temperature difference from degreesFahrenheit (°F) to degrees Celsius (°C),multiply by 0.5556.Values provided in this guide are in the English inch-pound (I-P) system.

CHILLER RENTAL CHECKLIST

For your reference, the following list of questions are among the additional factors your Cat Rental Power dealer will consider when evaluating your application.

Questions to answer:

How long will you need the rental? ____________________________________________________

___________________________________________________________________________________

What capacity (tonnage) do you require? ________________________________________________

___________________________________________________________________________________

What supply and return temperature does your system require? ____________________________

___________________________________________________________________________________

What chilled water flow rate do you require? ____________________________________________

___________________________________________________________________________________

What kind of water will be running through the chiller? ___________________________________

___________________________________________________________________________________

Will there be any contaminants in the water? ____________________________________________

___________________________________________________________________________________

How far away will the rental be from the point of connection?

___________________________________________________________________________________

How much water pressure will be on the chiller?_________________________________________

___________________________________________________________________________________

Do you have connections for a temporary chiller, if so what size?

___________________________________________________________________________________

Where are the connections located in the building? _______________________________________

___________________________________________________________________________________

What is your supply voltage? __________________________________________________________

___________________________________________________________________________________

Do you have a spare breaker, or will we tie into an existing breaker?_________________________

___________________________________________________________________________________

Will the rental be running along with other existing chillers or alone? _______________________

___________________________________________________________________________________

Note: This is intended as a guideline and should provide most information required for properinstallation of a Cat Rental chiller, but should not preclude a job site visit by a competent installingcontractor, if necessary.

KEY CONTACT TELEPHONE NUMBERSUse the front and back of this page as a working document to expedite chiller rentals during scheduled

and/or unscheduled outages.Photocopy the worksheet before you fill it out so that you can update it

continually.Keep an updated copy at home,since you may not have access to your office in an emergency.

Your name: ___________________________________________

CONTACT OFFICE HOME

In-house operations/ _______________________ _______________________

maintenance staff: _______________________ _______________________

_______________________ _______________________

_______________________ _______________________

_______________________ _______________________

_______________________ _______________________

_______________________ _______________________

_______________________ _______________________

_______________________ _______________________

Chiller supplier _______________________ _______________________

contact: _______________________ _______________________

_______________________ _______________________

Person responsible for chiller unit _______________________ _______________________

hookup and operation on site: _______________________ _______________________

_______________________ _______________________

Electrical engineer: _______________________ _______________________

_______________________ _______________________

Mechanical engineer: _______________________ _______________________

_______________________ _______________________

CHILLER OUTAGE WORKSHEET: IN-HOUSE CHILLER INFORMATIONIn order to ensure a quick, accurate response in the event of an emergency, use this worksheet

to record information about your cooling installation. List needs in order of priority, and whether

each is critical or non-critical.

Prioritized list of cooling loads: _____________________________________________________

Equipment name, model, and serial number: __________________________________________

________________________________________________________________________________

Tonnage/BTU per hour or kW/kCal __________________________________________________

Physical location of cooling loads (verbal description, distance from entry point, etc.):

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

Location where schematic drawings, electrical diagrams, Power Planner Worksheet and other

instructions are kept: _____________________________________________________________

________________________________________________________________________________

List electrical load connections which must be isolated from main breaker: ________________

________________________________________________________________________________

TEMPERATURE CONTROL EQUIPMENT/AUXILIARY EQUIPMENTSizes of chillers needed: ___________________________________________________________

Transportation arrangements: _______________________________________________________

________________________________________________________________________________

Required response time: ___________________________________________________________

Auxiliary equipment needed (hose, duct, etc.): ________________________________________

________________________________________________________________________________

Is company check needed for chiller pick-up? Yes ___ No ___

(Not applicable if arrangements are made for pre-approved credit)

Caterpillar.Your Local Resource.

Worldwide.A successful short-term cooling project depends on a partnership

between you and your equipment supplier. Cat Rental TemperatureControl puts a powerful partnership on your side.

Caterpillar has teamed with York International Corporation to designcooling equipment for the rental industry and make it available world-

wide.You benefit from York’s world-leading chiller technology andservice, with Caterpillar dealers’ legendary customer support and

product availability — anywhere, anytime.

Through your Cat Rental dealer, you’ll get the cooling equipment youneed, plus technical support to install, start and operate it. If your

project also calls for temporary electric power, your dealer has a fullrange of mobile, diesel-powered generator sets.

Your Cat Rental dealer is part of a worldwide network,with access to avast fleet of rental temperature control and power generation equipment.One phone call connects you to this network,offering the best in equip-

ment, support and advice.For any need,of any size:1-800-READY KW

North America Caterpillar Inc.

Peoria, Illinois,U.S.APhone: (309) 675-1000

Europe, Africa,Middle East Caterpillar Overseas S.A.

Geneva,SwitzerlandPhone: (41)-(22) 849-4444

Commonwealth of Independent StatesCaterpillar Overseas S.A.

Moscow,RussiaPhone: (7)-(095) 755-8161

AsiaCaterpillar Asia Pte.,Ltd.

SingaporePhone: (65) 662-8243

ChinaCaterpillar China Ltd.

Hong KongPhone: (852) 2848-0333

AustraliaCaterpillar of Australia Ltd.

Victoria, AustraliaPhone: (03) 339-9333

Mexico,The Caribbean,South AmericaCaterpillar Americas Co.

Peoria, Illinois,U.S.A.Phone: (309) 675-1513

©1998 Caterpillar Printed in U.S.A. LEDX 8237