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Cellular

Radio

Paging

Microwave/Satellite Earth Station

PCS

Utility Shelters

Mobile Medical Equipment Vehicles

Commercial Buildings

CATV

Mobile ElectronicStructures

Wireless

Digital

RBOC

Cellular

Radio

Paging

Microwave/Satellite Earth Station

PCS

Utility Shelters

Mobile Medical Equipment Vehicles

Commercial Buildings

CATV

Mobile ElectronicStructures

Wireless

Digital

RBOC

2

Air Conditioning Innovations fortheTelecommunications Industry

In our communications-based society, technologiesare being developed and used on a daily basis thatimpact all of our lives. A key element of the entirenew global network of communications systems cir-cling our cities and running parallel to our roadwaysare the shelters containing the electronic equipment.These shelters require air conditioning during most, ifnot all, of the year, to offset the high heat loads ofthe electronic equipment inside and ensure smoothoperations. Reliable Marvair™ Air Conditionerskeep the network operating whatever the outdoorconditions.

In the early l980’s, Marvair™ developed innovativeair conditioning units specifically for the emerging communications market. Marvair continues to be thepreferred choice for communications applications on aworldwide basis because they are durable, easy toinstall and perform reliably year after year.

Efficient Air Conditioning Systemsfor All TelecommunicationsApplications

With the telecommunications industry changing so quickly – cellular, cable, wireless, satellite, 2.5 & 3G– companies have made a sizable investment toensure that the electronic equipment vital to the com-munications operations work reliably inside the shelter.

Marvair’s full line of air conditioning products from one-half ton to six tons are designed and manufactured tocool communications shelters, huts and cabinets. Unitsare available for many voltages and most internationalpower supplies.

Marvair™ combines expertise in design, manufactur-ing and industry knowledge to be uniquely qualified toprovide the air conditioning units you need today.

Marvair™ Products are Flexible,Cost-Efficient Solutions for Today& Tomorrow

The optimum in cooling, Marvair’s ComPac® Series isdesigned and built with all of the controls needed forcooling your communications shelter for any season.The ComPac II models have a built-in economizer, totake advantage of using outside air during lower temperatures to cool the building. The economizercycle can reduce the run time on the compressor by upto 75%, extending compressor life and the longevity ofthe air conditioner. The ComPac I air conditioners areideal for tropical or subtropical environments or wherecorrosive outside air may damage sensitive telecommu-nications equipment.

Marvair™ units are used to coolutility structures, mobile electronicequipment vehicles, mobilemedical equipment vehicles andcommercial buildings.

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Marvair’sComPac® Series of AirConditioners -TheIndustryStandard

High efficiency scroll compressor

High pressure switch withlockout relay and auto resetlow pressure switch protectrefrigerant circuit.

Low ambient controlcycles condenser fan to regulate refrigerantpressures

Baked on polyester finish over tough galvanneal steel formaximum cabinet life

Front control panelallows easy access andcomplies with NECclearance codes onredundant systems

Timed low pressure by-pass for start-up ofA/C in cold weather(ComPac® I A/C only)

Copper tube, aluminum fin evaporator and condenser coils

Time delay/anti-shortcycle timer

Economizerdamper motor

Enthalpy controller

Dry contacts for remote alarm on lock-out

Mixed air sensor modulatesdamper to prevent thermalshock of electronic components

For Durability and Versatility, the ComPac™Air Conditioning UnitsHave No Match.

Tens of thousands of these ComPac®

air conditioners are now in servicearound the world. Built for ease ofinstallation and reliable operation, theseunits can be found on shelters whereveryou look.

ComPac® models provide the air conditioning solution for a wide range of conditions and applications: cellular, wireless shelters, microwave stations,PCS, utility shelters and mobile electronicequipment vehicles. With the built-ineconomizer, they offer more reliable operation and energy efficiency.

2" pleated filter

Marvair’s ComPac ® II™

Air Conditioner

A Marvair™ First - FactoryInstalled Economizer -ComPac® II A/C OnlyThe ComPac® II A/C’s economizer system makes this unit an outstandingchoice for efficient, long-term communi-cations shelter cooling. The ComPac IIA/C is controlled by a signal from thewall mounted indoor thermostat whencooling is required, whether mechanicalcooling with the compressor or freecooling with the economizer. A factoryinstalled enthalpy controller determineswhether the outside air is to be used,and if suitable, the compressor is lockedout and the economizer damper opens tobring in outside air. The temperature atwhich the economizer opens isadjustable from 53°F (12°C) at 50% relative humidity to 78°F (46°C) at 50%relative humidity.

Following the enthalpy control activa-tion, the mixed air sensor measures thetemperature of the air entering theindoor blower from the outside and modulates the economizer damper to supply the precise ratio of indoor and outdoor air for a discharge temperature of 50° to 56°F (10° to 13°C) to prevent thermal shock of the electronic compo-nents. The compressor will not operatewhen the economizer is functioning. Ifthe outside air becomes too hot orhumid, the economizer damper closesand mechanical cooling is activated.

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Marvair™ Environmental Control Units (ECU) weredesigned for the rigorous requirements of thetelecommunications cabinet. Like Marvair ComPac®

series of airconditioners,the MiniPac™,SlimPac™ andDoorPac™ ECUshave the specialized controls andfeatures neededto operate overa wide range ofambient condi-tions. Their

quiet operation permits them to be installed in areaswhere low sound levels are important.

Standard Features • High pressure switch with lockout relay and automatic

reset low pressure switch protects refrigerant circuit

• Adjustable compressor time delay

• Dry contacts for remote alarm or notification uponlockout

Low TemperatureStart-Up and Operation

• Low ambient control cyclescondenser motor to main-tain proper refrigerant pressures

• Timed low pressure by-passfor start-up of compressorwhen outdoor temperaturesare below 55°F (13°C)

Rugged Construction

• Metal cabinet with baked-on, weather resistant finish

• High efficiency compressor

• Copper tube, aluminum finevaporator and condenser coils

Marvair™ EnvironmentalControl Units

• Decorative coil guard protects condenser coil

SlimPac™ ECU The SlimPac™ ECU is built in cooling capacities of

12,000 and 18,000 BTUH. With its unique profile,the SlimPac ECU mounts quickly on the exterior of acabinet on either side of the splice chamber.

MiniPac™ ECU The MiniPac™ ECU has nominal cooling capacities

from 4,400 to 8,000 BTUH. The use of a condenserblower and an over/under condenser air intake anddischarge design allows the unit to be installed witha minimum of clearance around the sides.

DoorPac™ ECU The DoorPac™ ECU has a nominal cooling capacity

of 12,000 BTUH and is installed through the door ora telecommunication cabinet. This unique designminimizes the exterior space required.

ECU60 As more telecommunication equipment is added to

existing shelters, heat loads increase and more cool-ing is required. The Marvair™ ECU60 provides anideal solution to this problem. The ECU60 is designed

as a field replacement forMarvair’s 3 Ton ComPac® I airconditioner. The uniquedesign eliminates the need tocut new openings in the shel-ter. It has the same size sup-ply and return openings asthe AVP36 but with 50%more cooling capacity.

When you need to increasethe cooling capacity and yourcurrent unit is the ComPac® IIair conditioner with the built-ineconomizer, we can provide awall curb that mounts on theside of the shelter. This curbprovides a transition from theexisting openings to a 5 TonComPac II air conditioner.

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From the Deserts of the Mid-East tothe Arctic Tundra, CommunicationsContinue Thanks to the Marvair™Air Conditioning Capabilities...

As the communications industry expands furtheracross the globe, outside conditions for the communi-cations shelters will differ greatly while the internalcomponents will still need to be cooled and maintainedat a consistent temperature for reliable operation.Marvair™ Air Conditioning units offer solutions to thechanging landscapes and provide more versatility thanany other type of communications cooling units. Whatthis means to our customers is that the ComPac® I andComPac II units can be easily modified at the time oforder to suit special conditions or climate requirements.Our option packages include:

Harsh Environment Conditions*• Climate Options – The Extreme Duty Package con-

sists of various components and controls to allowMarvair™ ComPac® II units to operate from -20°F (-29°C) to 130°F (54°C) and the ComPac I units tooperate from 0°F (-18°C) to 130°F (54°C).

• Coastal Environment Kit – ComPac® I A/C only –Protective coatings added on selected internal components when units are to be installed near an ocean or sea.

• Protective Coil Coatings – Either the condenser coilor evaporator coil or both can be coated with a protective coating. Used in marine or corrosive environments such as power plants, paper mills andapplications susceptible to salt-spray.

• Stainless Steel Cabinet – ComPac® I A/C only – allexterior sheet metal constructed of stainless steel forhigh durability or unusual weather conditions.

Special Purpose*• Dehumidification Kit – ComPac® I and II A/C –

Humidity Controller bypasses cooling thermostat andallows electric heat to operate simultaneously.

• High Filtration Package - ComPac® I and II A/C -Units are built with up to 95% efficient filters.ComPac II units have a prefilter on outside air.

• Hot Gas By-Pass – ComPac® I A/C only – Used inspecialty applications to prevent magnetic voltagedisturbance caused by compressor cycling. Two hotgas by-pass option packages are available to allowoperation to 20°F (-7°C) or minus 20°F (-29°C).

• Counterflow - ComPac® I and II A/C - Units can bebuilt with air flow from the bottom of the unit forunder-floor air conditioning or special requirements.

Marvair™ DualPac™ Air ConditionersThe DualPac™ air

conditioners are uniquein that they incorporatetwo independent airconditioning systemswithin a single cabinet.This provides redun-dancy without the needfor two separate units.The units have twocompressors, two condenser coils, a separately circuited evaporator coil, separate controls, one evaporator blower motor and one condenser fan motor.

The DualPac™ air conditioners are especially effective in sites where the heat load is expected toincrease as new communications equipment is addeddue to growth of system demand. Matching coolingcapacity with cooling needs, results in improved reliability because of fewer start/stop cycles and moreprecise temperature control within the enclosure.

Marvair™ Custom UnitsMarvair™ combines expertise in design, manufactur-

ing and industry knowledge to provide air conditioningsystems and solutions for what you need today.Shelters, cabinets, huts, unique shelter designs, tight dimensions or unusual capacity requirements are not a problem; we can build a custom solution. Marvair continues to monitor the telecommunications industryand develop new products to solve unique cooling situations and respond to market changes.

Speciality Air Conditioners and ECUs

*See ComPac® Product Data Sheet for details.

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Marvair™ Lead/Lag Controllers

Marvair™ lead/lag controllers will operate a fully orpartially redundant air conditioning system providing twostages of cooling and two stages of heating. The con-trollers insure equal wear on both air conditioners orECUs while allowing the lag unit to assist upon demand.

CommStat 3™ Solid State Controller with userdefined set points. LEDs indicate control power, function(heating or coolingof each unit), thelead unit and highor low refrigerantpressure lockout. Adigital display showstemperatures ineither Fahrenheit orCelsius. The comfort override button temporarily over-rides set points for 90 minutes to provide a comfortableworking environment for personnel. The lead/lagchangeover is programmable in 1/2 day incrementsfrom 1/2 to 7 days.

Five alarm relays - power, low building temperature,high building temperature, refrigerant pressure lockoutand smoke alarm - can be used for remote alarm ornotification.

The CommStat 3™ Controller is factory programmedwith standard industry set points, but set points can bequickly and easily changed in the field.

LL357A1 Controller has silent, dust-free mercuryswitches operated by coiled bi-metallic elements. Thesolid state timing device provides lead/lag switch overevery 3-1/2 or 7 days and retention for up to one houron power loss. The LL357A1 controller has an auto sys-tem switch, locking cover and adjustable locking tem-perature lever screws. To facilitate service, a pushbutton mounted on the timing module switches the leadto the lag unit after being depressed for 3 seconds.

CommStat 3™ & LL357A1Controllers and Accessories

Factory Selected AccessoriesOptimize Performance ofMarvair™ UnitsComPac® A/C and ECU Accessories:

• Supply Grille • Return Grille

• Return Filter Grille • Thermostats & Sub-Bases

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Marvair™ Nationwide Network of Service Contractors

Most companies want an air conditioning systemon their communications shelters that they can put inthe field and walk away from. Marvair™ air condi-tioners are designed for years of reliable operation.

However if service is required, Marvair™ has aNationwide Network of Service Contractors toquickly investigate problems and bring units quicklyback on line. The communications industry has acritical need for quick and reliable response to problems. Considering the investment and loss ofrevenue when a shelter goes down, it makes senseto use an air conditioner designed and built for thistype of use, and also deal with a company that hascontractors available throughout a network to service and maintain the integrity of the air conditioning system.

In the United States., simply call our toll freenumber: 800-841-7854, for the closest service contractor.

Customer Service Network,Spare Parts Kits & Warranty

Marvair™ “Spare Parts Kits”Communications shelters are not always in the

easiest to reach places, and for that reason,Marvair™ also sells many customers a “Spare PartsKit” – a complete inventory of many componentsthat will allow easy service and rapid repair of a unitin situations where downtime is critical.

Silver Service™ Warranty As an added service to our customers, we can

provide an extended warranty on our air conditioningunits. The optional extended Silver Service™Warranty offers firstyear limited labor warranty in addition to the standard Marvair™ parts warranty. SILVER

S E R V I C E

Nationwide Network of Service Centers

156 Seedling Drive � Cordele, GA 31015Phone: 229-273-3636 � Fax: 229-273-5154

Email: marvair@airxcel.com � www.marvair.comApril 2003

Supersedes June 1999