09/00 7085 PVW/PCW PVR/PCR Packaged Air …6 STANDARD FEATURES (CONT.) Single Fan Size 15 Twin Fan Size 20-39 Full Perimeter Gasketing Internally Isolated Fan/Motor Assembly Upper

Features• Splittable design for retrofit

• Reliable performance• Application flexibility

• Quiet operation• Energy efficient

PVW/PCWPVR/PCR

Form No. 7085

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Packaged AirConditioning UnitWater-Cooled & Air-Cooled15 to 39 Tons

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PRODUCT DESCRIPTION ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

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TABLE OF CONTENTS

P V W SD 35

Packaged Nominal Capacity (Tons)

(V) Variable Air Volume(C) Constant Air Volume

(W) Water Cooled Condenser (S) Scroll Compressor(R) Remote Air Cooled Condenser (D) Design Vintage

NOMENCLATURE

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Page No.Product Description .............................................................................................................................................. 2

Nomenclature ....................................................................................................................................................... 3

Introduction ......................................................................................................................................................... 4

Standard Features ........................................................................................................................................... 5 - 6

Unit Features: Scroll Compressors ....................................................................................................................... 7

Construction Features

Standard Components .............................................................................................................................. 8 - 9

Accessories ............................................................................................................................................ 10 - 12

Windows® Based Microcomputer Controller ............................................................................................... 13 -15

Electrical Options ........................................................................................................................................ 16 - 17

Electrical Accessories .......................................................................................................................................... 17

Physical Data ...................................................................................................................................................... 18

Weights .............................................................................................................................................................. 19

Selection Procedure ............................................................................................................................................ 20

Performance Data:

DX ......................................................................................................................................................... 21 - 23

Economizer ........................................................................................................................................... 24 - 29

Fan Curves ................................................................................................................................................... 30 - 32

Air Pressure Drop................................................................................................................................................ 33

Pressure Drop Curves.......................................................................................................................................... 34

Application Information .............................................................................................................................. 35 - 36

Dimensional Data ........................................................................................................................................ 37 - 39

Typical Wiring Diagrams .............................................................................................................................. 40 - 42

Electrical Data ..................................................................................................................................................... 43

Engineering Guide Specifications ....................................................................................................................... 44

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INTRODUCTION ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Quiet

Providing satisfactory sound levels in occupied spacesis a critical concern with packaged VAV (Variable AirVolume) equipment and the PVW/PCW sets a newindustry standard for quiet operation. The 15 thru 39ton units utilize a pair of Copeland scroll compressors.

The PVW/PCW airside design also offers many soundreducing features including a heavy, fully insulated andgasketed cabinet. A single Lau blower on 15 ton unitand twin Lau blowers on 20-39 units with a commonframe and shaft are utilized on the standard constantair volume PCW unit. Optional inlet vanes on the PVWunit, or variable frequency drives are offered to reduceairflow noise at part loads as well as minimize ductpressurization and related VAV box sound levels.

Efficient

Water cooled VAV systems offer many inherentadvantages for reducing power consumption. The inletvane or VFD option also offers substantially greatersavings than VAV dampers or other “ride the curve”VAV modulation.

Reliable

VAV operation is a strenuous test for DX systems andrequires special design considerations. Precise dischargetemperature control must be maintained withoutexcessive compressor cycling. A microprocessor controlsystem is utilized for optimum control with excellentreliability. All models offer hot gas bypass on circuit#1. PVW/PCW compressors are matched to Thermo-Blend DX coils, with interlaced circuits, with fully activeface areas at part load to eliminate stratification,inherent compressor anti-cycle timers, and widemodulation thermal expansion valves, to offer anindustrial quality refrigeration system. This design isbacked with factory testing of each unit and ETLcertification.

The Vertical, Water-Cooled, VAV Package with the QualityNeeded for Trouble-Free Installations

Flexible

The PVW/PCW is specially designed for the high staticpressure associated with VAV applications completewith a rugged, fully gasketed cabinet, to minimize airleakage. Dunham-Bush also offers water or air sideeconomizers, steam or hot water coils, a wide range offilter options, single source power with or withoutdisconnect, and cleanable shell and tube condenserswith 250# psi water working pressures standard and300# psi optional. The PVW/PCW is truly designed tomeet virtually any multi-floor VAV requirements.

Factory Shipping Options

The new PVW/PCW15-39 can be shipped:

• as a complete assembly with base unit, optionaleconomizer and flat filter (plus heating coil whenrequired)

• with the base unit completely assembled but set upfor field splitting into modules for ease of installationwhere access space doesn’t allow the complete unitto be moved.

• with separate sections where the coil/fan section isseparate from the compressor section “SPLIT APART”.

Unit “SPLIT APART” design includes:

• Base compressor and condenser section• Fan and coil section• Economizer section (when used) can also be

separated to two sections• Economizer section (when used) can also be

separated to two sections: coil section and pipingsections

• Filter section (optional)

See page 38 for dimensional data on views of “SPLITAPART” sections.

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STANDARD FEATURES ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

The Ideal Product for Multi-Floor Office Buildings

Complete Factory Package

• Self-contained condensing unit, air handler and controls

• Minimize design and service problems by obtaining single source responsibility

Add Leasable Space

• No vertical air shafts

• Compact design uses minimum space compared to separate chiller and air handler system

First Cost Savings

• Factory testing and adjustment reduces start-up expenses

• Delay purchase until occupancy occurs and exact capacity is determined

• Floor-by-floor design reduces smoke and fire protection expenses

• Utilize system diversity to reduce first cost

Operating Cost Savings

• VAV fan control reduces fan energy consumption

• Free economizer cooling, from fresh air or tower water, meets internal loads at low ambients

• Water cooled condensers and DX cooling reduce compressor operating costs

Tenant Operating Control

• Cost of operation can be accurately apportioned floor-by-floor

• Partially occupied utility costs are minimized by operating units only as needed

• Individual metering is available encouraging tenant energy conservation

Flexibility

• Easily adapted to Energy Management Systems

• Compact design is ideal for retrofit applications

• VAV offers efficient, close tolerance zone control with the flexibility to meet tenant changes

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STANDARD FEATURES (CONT.)

Single Fan Size 15Twin Fan Size 20-39

Full PerimeterGasketing

Internally IsolatedFan/MotorAssembly

Upper Section(Fan/Motor/Evap Coil

Control Box)

EconomizerPiping

EconomizerSection

Compressor/CondenserSection

Twin CopelandScroll Compressors

Lifting Holes

Power Box

Lifting Holes(Upper Section)

Control Box

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MicroprocessorControl

Display/Keypad

Size 20-39 shown with Inlet Guide Vanes

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UNIT FEATURES: SCROLL COMPRESSORS ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Scroll Compressors have much better liquidrefrigerant handling capability than other types ofcompressors due to the nature of scroll design.

Scroll Compressor Durability and Reliabilityas well as Quiet Operation is inherent with the designof the scroll compressor. Scroll compressors have fewmoving parts, oversized Teflon impregnated bearingsand a smooth gas flow compression cycle, to ensuredurability and reliability.

A Large Capacity Built-In Suction Filter islocated between the suction inlet and the motor toprevent abrasive material such as flux, dirt, scale or metalchips from entering the motor cavity. The abrasive actionof this foreign material would crack, chip and wear themotor insulation which could cause premature motorfailure. These same abrasives could also cause bearingseizures and excessive wear of all surfaces.

Compressor Motor Dependability has beendeveloped with heavy duty motor windings cooled bysuction refrigerant gas. Motor winding insulationsystems exceed Class B requirements and overloadprotection is accomplished by solid state motor modulewith winding temperature thermistor sensor input.

Compressor Lubrication is provided by an integralcentrifugal pumping system through the center of themotor/scroll shaft.

Quiet Operation of Scroll Compressorsensures considerably quieter unit operation, than othertypes of compressors. Heavy construction, few movingparts, small motor horsepower, and smooth gas flowthrough the orbital compression cycle, ensures quietoperation of our PVW/PCW units.

Vibration Free Operation is ensured by smoothquiet compressor operation plus having thecompressors mounted with rubber grommets to theunit base frame.

Capacity Control Modulation is managed by theunits Microcomputer Controller inresponse to system load requirements. The system loadrequirements are measured by sensing the unit's leavingair temperature and staging the compressorsaccordingly. The unit part load efficiency is excellentdue to the staging sequence of the compressors to meetthe required load.

Capacity Control Modulation with StandardHot Gas By-Pass, operates by imposing an artificialload on the evaporator. Discharge gas from thecompressor is introduced to the liquid-vapor mixtureof refrigerant downstream of the expansion valve. Thedischarge gas is cooled by the liquid refrigerant presentin the turbulence of the evaporator so that the finaltemperature of refrigerant gas leaving the evaporatordoes not rise. Hot gas by-pass does not offer any energysavings, but does allow the cooling capacity to theequipment to vary precisely with the load requirements.HGBP is standard on circuit #1. HGBP on circuit #2 isoptional.

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CONSTRUCTION FEATURES

FansInternal spring isolation of the fan and motor assemblyassures minimal external vibration. The blower assemblyis twin fans in a welded heavy gage framework. Thisfan assembly can be supplied with or without the inletvane option. A single fan is used on the 15-ton unit.

The blower outlet is isolated from the cabinet withrubber flexible ducting material. Internal fan/motorisolation eliminates the need for duct and water pipingflexible connections. The outlet duct can be connectedto each individual fan or the standard outlet flangeprovided to eliminate the need for "duct pants".

All fans are statically and dynamically balanced.

The fan can be positioned to provide three dischargeduct arrangements for maximum flexibility: Fronthorizontal discharge, for low ceiling height applications,and top vertical discharge, both clockwise andcounterclockwise, are available.

Multi-bladed, forward curved fans are used as standard.These fans are excellent selections for low and mediumpressure applications.

Shell & Tube CondensersThe Shell and through tube design with water flowingthrough the tubes and refrigerant in the shell is sizedfor full pumpdown capacity.

A separate condenser is utilized on each compressorcircuit.

Construction Details:

Shell — Seamless carbon steel.

Tubes — Seamless, integral finned copper which arerolled expanded into the tube sheets.

Heads — Cast iron with integral baffled circuiting.Heads are field removable to allow access to the tubesfrom either end.

Tube Sheets — Flange quality carbon steel which iswelded to the shell.

Dunham-Bush condensers are provided with an integralsub-cooler circuit. Liquid refrigerant moves counterflowto the inlet water for optimum sub-cooling effect. Unitcapacity is increased without increased powerconsumption.

The 6 inch diameter condenser on the 15 and 20 tonunits are UL listed or ETL listed.

Shell & Tube Condenser

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The 8 inch diameter condensers on the 25-39 units arebuilt in accordance with the ASME Code for unfiredpressure vessels and stamped accordingly. Workingpressure limitations are 350 psi for the refrigerant sideand 250 psi on the water side.

Condensers are optionally available with 300 psi waterside working pressures. A relief device and purge valveis supplied as standard.

Marine duty condensers are available as an option forthose applications that reqauire materials that areunaffected by contaminated water sources.

Optional Variable Inlet Guide Vanes—PVW/PCW UnitsVariable inlet guide vanes are mounted in each fan inlet.This design minimizes static pressure loss while in thewide open position and provides highly efficient flowmodulation when operating at part load conditions. Anelectric damper motor which responds to the staticpressure conditions in the ductwork, activates anddetermines the position of the vanes.

Inlet vanes offer performance far superior to VAVdampers and/or shutting off terminal boxes and “ridingthe fan curve.”

1. Superior bhp reduction is achieved with significantenergy savings.

2. Only inlet vanes offer TSP reduction at part loadallowing significant noise reduction.

3. Inlet vane turndown is far greater than withdampers minimizing potential for fan surge.

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CONSTRUCTION FEATURES (CONT.) ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Optional VFDThe optional VFD is available internally mounted for 460volts for all motor HP sizes. A removable access panelprovides complete control access and readout of theVFD. At 208/230 volts, the 3-10 HP VFD will beinternally mounted. 15-25 HP VFP for 208/230 unitswill be externally remote mounted in the equipmentroom. An optional bypass feature allows full airflow inthe event of a drive failure (contact the factory) for moreinformation.

Optional VFD

Power ControlsPower compartment controls include:

• Compressor motor contactors and optional circuitbreakers

• Power terminal block or optional fused/non-fuseddisconnect. Disconnect available with thru the doorhandle. See order entry sheet for voltagerestrictions.

• Single source field power wiring connection

• Fan motor starter and fusing

• Control transformer for 115 volt control panelpower

• Optional phase loss monitor over/under-voltagedevice is available

The VFD canbe externallysupplied andfield installedoutside theunit for allunit sizes.

Power Wiring Control Box

Microprocessor Control Box

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CONSTRUCTION FEATURES: OPTIONAL ACCESSORIES

Type RV-RVDRubber-In-Shear

Vibration Isolator

Type XLVibration Isolatorfor 1” Deflection

Style C — Internal Adjust-ment

with Projecting Stud

2 3/4

3 1/86 3/8

81/2 Dia. Stud5/8 Projection

AdjustingNut

Top Plate & LowerHousing - Cast Aluminum

5 7/8Free Ht.

5 1/4Oper. Ht.

Ribbed Neoprene Pad

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Flat Filter SectionsSpace saving, economical flat filter sections are availablefor both 2” and 4” filters. The 4” pleated 35% efficientfilter has more filter surface than the 2” pleated filterand, therefore, lower resistance to air flow. Theincreased surface of the 4” filters also means fewer filterchanges per year. See order form for various filterefficiencies.

High Capacity Filter SectionsDesigned for high CFM applications. Filters are arrangedin a “V” or “W” pattern to give the greatest surfacepossible. The increased filter area found in high capacityfilter sections will extend the life of the filter and reduceresistance to air flow. This results in less fan horsepower.The high capacity filter sections have access doors oneach side for ease of filter change.

Mixing BoxTwo types of mixing box sections are available, themixing box only or the combination mixing box andthe angle filter section. Both types have parallel bladeswith interconnecting linkage. The damper rods rotatein low friction sleeve bearings and the drive rod extendsfrom both ends for either left or right hand connection.

Unit External Isolators in addition toInternal Fan/Motor IsolationThe unit is supplied with internal fan/motor isolation.For installations where unit vibration is especially critical,both rubber-in-shear and spring-type isolators areavailable as optional equipment for field installation.Mounting holes are provided in the unit base.

Heating CoilsHeating Coil sections complete with water heating coils;steam heating coils or electric heaters are available.These sections are arranged for field mounting on theinlet side of the PVW/PCW units. General VAV design isoriented towards cooling only units with options formorning warm-up. Comfort heat is generally providedat the perimeter. The PVW/PCW heating coils areavailable with 1 step, zone air temperature controlled,morning warm-up sensor.

Water Heating CoilsWater heating coils can be furnished with 1/2” O.D.copper tubes and aluminum fins. Coils having onethrough four rows and 8, 10, 12 fins per inch areavailable.

All coils are circuited and installed for counterflowoperation and are certified for 250 PSIG water workingpressure and 200°F temperature. (Caution — specialprecautions must be taken when entering airtemperatures are below 32°F.)

Hot water heating coils can be selected from coilselection computer programs available from your localDunham-Bush representatives.

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CONSTRUCTION FEATURES: OPTIONAL ACCESSORIES (CONT.)

Outdoor Air

ChargeoverSensor

EconomizerMix Box

DamperMotor

Return Air

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Steam Heating CoilsType NFS steam coils can be furnished with 5/8” O.D.(Type 5) or 1 1/8” O.D. (Type 9) diameter copper tubesand aluminum plate type fins.

Type 5 coils are available having one or two row and 8,10, 12 and 14 fins per inch.

Type 9 coils are available having one row 4, 5, 6, 7, 8,9, 10 and 12 fins per inch.

These non-freeze type coils feature steam distributingtubes fabricated with directional kinetic orifices spacedso as to insure positive condensate removal and evensteam distribution over the entire coil face.

Steam heating coils can be selected from the Dunham-Bush coil selection computer programs available fromyour local Dunham-Bush representatives.

EconomizersMany PVW/PCW applications have high internal heatloads and require cooling even when the outdoordrybulb and/or wetbulb temperatures are well belowthe design outdoor temperature range. When thissituation is encountered, significant energy savings canoften be achieved by the use of an economizer cycle.

Dunham-Bush offers two optional types of Economizersfor use with PVW/PCW units:

The Water-Side Economizer uses cooling tower water,circulated through a factory mounted pre-cooling coil,as the cooling medium.

The Air-Side Economizer utilizes outside air, mixed withreturn air, to first satisfy the cooling load.

The control of both Economizers are integrated intothe DB Director microprocessor. The control logic firstuses economizer cooling to satisfy the load andsupplements it with compressor cooling as necessary.Microprocessor logic with adjustable setpoints isprovided to prevent economizer operation if supplywater or outdoor air enthalpy is excessive.

High Water Side Working Pressure (Optional)

Multi-story buildings often involve a significant amountof static head which must be considered in the design.Static head can be estimated by the equation:

1 psi = 2.2 feet of water column

The standard condenser water side working pressure is250 psi. On high rise applications an optional condenseris offered with 300 psi working pressure. The optionalwater side economizer coil, valve and piping areprovided with the same working pressure as the chosencondenser.

PVW/PCW Unit with Optional Air-Side Economizer

When the Air-Side Economizer is used, outside air isintroduced directly into the conditioned space throughthe field mounted mixing box section installed on theair intake side of the PVW/PCW unit. The PVW/PCW unitmicroprocessor controller, used in conjunction with theoutdoor air enthalpy sensor and damper motor, controlsthe proportion of return air and outside air. Fieldprovisions must be made for exhausting intake air. Themixing box is shipped separately from the main unit.

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CONSTRUCTION FEATURES: OPTIONAL ACCESSORIES (CONT.)

Entering Water Sensor toMicroprocessor Control

Compressor

ARR 3

ARR 2ARR 1Mechanical Cooling Coil

Water Economizer3-Way Modulating Valve

AirFlow

Cool Water

Warm Water

Water Side Economizer Schematic (water flow path information only)

Fan Discharge

Fan Discharge

PVW/PCW Unit with Optional Water Side Economizer

The Water-Side Economizer consists of a water coil andcasing which is factory mounted to the air inlet side ofthe PVW/PCW unit. This coil is factory piped to thecondensers including a three-way bypass valve aroundthe free cooling coil and is optionally available with amechanically cleanable tube design.

The PVW/PCW unit microprocessor controller, used inconjunction with a cooling tower water temperaturesensor and three-way valve (factory mounted) controlsthe proportion of water from the cooling tower that iscirculated through the Economizer coil. This free coolinginvolves no additional field installation costs with thepossible exception of insulating cooling tower plumbingsince water temperatures often drop to 50°F or below.

An additional advantage of a water side economizer isthat the need for head pressure control valves iseliminated. The free cooling coil can provide designcooling, eliminating compressor operation, wheneverwater temperature drops excessively.

The following must be considered when the watersideeconomizer option is utilized: The economizer coil isprovided with a factory installed drain pan and drainconnection, which is separate from the DX coil drainconnection. Two traps and two drain connections mustbe provided.

ALL DISSIMILAR METALS ARE SEPARATED BYDIELECTRIC FITTINGS. THIS IS VERY IMPORTANT ONOPEN TOWER SYSTEMS.

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WINDOWS® BASED MICROCOMPUTER CONTROLLER ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Complementing our high-energy efficient product is aFull Function Microcomputer Controller designed tokeep your system running at its most Energy EfficientLevel, based on current load.

This system is designed as a Control ‘State’ (control sta-tus) microcomputer providing the user with the cur-rent Control State for the exact information on whatthe microcomputer is doing. Some of the main fea-tures of the controller are as follows:

• A large character backlit LCD display that can be seenin bright or dim lighting.

• A 16 function keypad that is so user friendly it rarelyrequires a reference manual.

• A four-layer printed circuit board provides extremelyhigh quality and unit control stability.

• A battery backed up Real Time Clock that shouldnever need attention.

• An automatic power monitoring system that isdesigned to protect your system.

• Multiple authorization levels to provide completesecurity of the control system.

• Automatic history storage that provides data to aflexible static and dynamic graphing system (withPC interface).

• Extended temperature range to allow operation ineither hot or cold climates, from -40°F (-40°C) to 140°F(60°C).

• A PC control programming download/pullback inonly 45 seconds (with PC interface).

• Alarm information is provided in simple English forthe previous 32 alarms, with data shown down tothe second.

• The system provides (with PC interface) ‘last time’enabled & disabled, number cycles, and total runhours.

• A slope algorithm control function with all analogsread 10 times per second which provides unparalleledstability.

• A ‘control zone’ based on leaving air temperaturethat reduces compressor cycling, and improves unitpart load efficiency.

• A proactive compressor protection logic forprotecting against low or high discharge pressure tominimize compressor cycling and nuisance trips (withPressure TXD option).

• A Windows® based display providing all pertinentinformation on your ‘PC’ (with PC interface).

• A high speed RS232 port operating at 19,200 baudfor connection to a local PC up to 100 feet (30 meters)away or a modem at 14,400 baud ratecommunications for remote communication.

• A high speed RS485 port for connection to a buildingmanagement system, or PC at 38,400 baud ratecommunications up to 6000 feet (1829 meters) awayfrom the chiller(s).

Full FunctionMicrocomputer

Controllerwith Optional

Windows® BasedPC Interface

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WINDOWS® BASED MICROCOMPUTER CONTROLLER (CONT.)

Display Information

All information is displayed using common terms thatare easy to understand. It is a simple procedure todetermine the actual status of the system and the in-dividual circuits, as they are displayed in common termsthat are meaningful. The 2 line by 16 extra large char-acter alphanumeric liquid crystal display (LCD) utilizeseasy to understand menu-driven software. The LCDdisplays eight character alphanumeric sensor namesand twelve character alphanumeric set point namesenabling the use of meaningful status names. Thisenables an inexperienced operator to quickly workthrough these menus to obtain the information theyrequire or to modify control parameters. The well de-signed keypad is separated into a DISPLAY STATUS sec-tion and an ENTRY section each consisting of eightkeys that are clearly labeled to identify the informa-tion that will be displayed. When data is being modi-fied, the second display line contains help informationto ensure that the desired modification is properlymade. Easily accessible measurements include:

• Current capacity status• Current circuit/compressor status• Leaving chilled air temperature• Evaporator pressure of each refrigerant circuit (with

Pressure TXD option)• Condenser pressure of each refrigerant circuit (with

Pressure TXD option)• Compressor elapsed run time, each compressor• Number of compressor starts• Compressor contactor status• Fan on/off status• Condenser water flow switch status (optional)• External start/stop command status• Duct static pressure (variable air flow options)• Air flow switch status• Entering condenser water temperature (option)• Zone temperature (optional)• Return air temperature (optional)• Dirty filter pressure switch status (optional)• Mixed air temperature (optional)• Outside air temperature, humidity and enthalpy

(optional)• Air or water economizer position (optional)

Capacity Control

Control is based upon leaving chilled air temperature.How fast the temperature is changing is calculated andcapacity decisions are based upon the rate, the cur-rent temperature, and the control temperature zone.Capacity is never added if the system is moving to-ward the temperature target at an acceptable rate. Theunit will monitor all control functions and stage thecompressors to maintain the required operating ca-pacity. Remote adjustment of the leaving chilled airsetpoint is accomplished through either direct connec-tion of a remote keypad to the microcomputer throughthe RS485 long distance differential communicationsport, or via PC or a modem connected to the RS232communication port.

System Control

The unit may be started or stopped manually, orthrough the use of an external signal from a BuildingAutomation System. In addition, the microcomputermay be programmed with a seven-day optional cycle.

System Protection

The following system protection controls will automati-cally act to insure system reliability:

• Low suction pressure• High discharge pressure• High compressor motor temperature• Freeze protection of water economizer when mix-

ing box supplied• Compressor run error• Fan overload• High duct static pressure (VAV option)• Compressor circuit breakers (optional)• Over/under voltage (optional)• Chilled air flow loss• Sensor error• Anti-recycle time delay• Low condenser water flow (optional)

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2) PCON - PC Connection:

The PC Connection program provides communications for complete operation of the packaged chiller includ-ing graphing information. This option is available through two communications techniques as follows:

a) PCCB (Basic) (Figure 12B)The standard communications for PCCB is via the RS232 connection which may be as far as 100 feet (30meters) away from the packaged unit.

Figure 12B

b) PCCE (Enhanced) (Figure 12C)The enhanced PCCE system allows for communications via the RS485 port and can be located as far as6000 feet from the packaged chiller(s). This option requires the addition of a gateway to convert theRS485 port back to a RS232 port and then may be connected to a modem or directly to a PC. Oneadditional feature is that you may field install a manual AB switch, which allows switching between a localPC and a modem.

Figure 12C

As can be seen, the microcomputer system allows for a variety of remote connection capabilities for almost infiniteflexibility. Utilizing the PC connection program, up to twenty packaged chillers connected via the RS485/RS232 portscan be monitored. The user may then select whichever packaged unit to review.

Remote Monitoring

The Microcomputer is equipped with a high speed RS232 communications port and two high speed RS485 com-munications ports, to allow for a variety of different remote monitoring operations. The RS232 communicationsport allows for remote communications at distances of up to 100 feet over a 4-wire shielded cable. The RS485communication system allows for remote communications at up to 6000 feet (1829 meters) with a 2-wire shieldedcable connection.

1) RMCT - Remote Mounted Control Terminal (Figure 12A)

This Remote Mounted Control Terminal (RMCT) is a stand alone Control Terminal to communicate and controlthe unit from a remote location up to 6000 feet (1829 meters) away, via the 485 communications port, whenwired with a 2-wire shielded cable. The RMCT will then operate just like the controller in the unit.

Figure 12A

UNITCONTROLLER

REMOTE CONTROLTERMINAL

RS485 — UP TO 6000 FEET (1829 METERS) AWAY

RMCTREMOTE MOUNTEDCONTROL TERMINAL

➙

UNITCONTROLLER

RS232 — UP TO 100 FEET (30 METERS) AWAY

Local PC withWindows® & PC-CONN

UNITCONTROLLER

RS485

UNITCONTROLLER

UNITCONTROLLER

Local PC withWindows® & PC-CONN

RS485 MSC 485GATEWAY

RS485

RS232

16

ELECTRICAL OPTIONS ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

ChillerLINK—for RS232 communication with buildingmanagement systems (BMS) through BACnet orModbus. If RS485, N2 bus, or LonWorks is desired,please contact Dunham-Bush application engineering.See ChillerLINK Programming Sheet Form SD202-22203.

Modem—for long distance communication with asingle package. Allows the system to be monitored,retrieve logs, and assist with investigating potentialproblems quickly and in a cost effective manner from aremote source. This requires the PC Connect software(see accessories). A dedicated phone line should besupplied for the modem.

Modem with Gateway—for long distancecommunication with multiple packages. The gatewayconverts the RS232 of the modem to RS485 forconnection to multiple packages. Allows the system tobe monitored, retrieve logs, and assist with investigatingpotential problems quickly and in a cost effectivemanner from a remote source. This requires the PCConnect software (see accessories). A dedicated phoneline should be supplied for the modem.

VFD Factory Mounted—a variable frequency drive isfactory mounted and wired for control of duct staticpressure in VAV systems. A static pressure sensor issupplied and wired in the unit. Tubing to connect theduct static pressure to the “High” pressure port mustbe field supplied and mounted.

VFD Field Supplied—a terminal block in the power boxfor load side wiring of the field supplied VFD is supplied.The short-circuit protection for the VFD must also beprovided by others. Interface requirements to thecontrols on the unit include the following:

• Accepts a maintained contact closure to activate thedrive.

• Accepts a 0-10VDC signal to control the speed of thefan from a minimum speed to maximum speed.

• Normally Closed Alarm contacts rated for 0.3A @120VAC.

• Normally Open Running indication. This can beprovided by contact closure or open-collector outputrated for 5VDC.

A static pressure sensor is supplied and wired in theunit. Tubing to connect the duct static pressure to the“High” pressure port must be field supplied andmounted.

Inlet Vane Control—Inlet vanes with controllingmodulating motor are factory mounted and wired. Astatic pressure sensor is supplied and wired in the unit.Tubing to connect the duct static pressure to the “High”pressure port must be field supplied and mounted.

Hot Gas Bypass—includes HGBP on refrigerant circuit#2 in addition to the HGBP that is standard on circuit#1. This option also includes automatic lead/lag.

Unit Mounted Disconnect Switch (Non-fused)—molded case disconnect switch in the power box withthrough-the-door handle.

• for model sizes 15 a 20, available on all voltages.

• for model sizes 25 - 39, available on 460-575V only.

Compressor Circuit Breakers—provides additionalshort-circuit protection for each compressor. Also allowspower to be removed from the individual compressorcontactors.

Over/under Voltage Monitor—protects against highand low incoming voltage conditions as well as singlephasing, phase reversal and phase imbalance byopening the control circuit. It is an automatic resetdevice.

Air Flow Switch—an adjustable differential pressureair flow switch is mounted and wired. Tubing to connectthe duct static pressure to the “High” pressure port mustbe field supplied and mounted.

Pilot Lights—Standard lights include Control power,Compressor control, Compressor status, Fan status andAlarm. This option adds a Fan Overload light andindividual Compressor Alarm lights to indicate a trippedhigh pressure switch, overload protector, or circuitbreaker open condition.

Humidity/Outside Air Temperature Sensor—Thissensor is required for units with the air economizeroption selected. The calculated enthalpy is used forcontrol of the economizer. For other units, this sensorcan be selected for monitoring purposes. Field mountingand wiring is required.

Mixed Air Temperature Sensor —This sensor may beused with an air economizer or mixing box and is formonitoring purposes only. Field mounting and wiringis required.

Return Air Temperature Sensor—This sensor is usedfor monitoring purposes. Field mounting and wiring isrequired.

17

ELECTRICAL OPTIONS (CONT.) ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Condenser Water Temperature Sensors—If a watereconomizer option is selected, the entering condensertemperature sensor will be automatically supplied. If aleaving water temp sensor is also desired, this optionmust be selected. If a water economizer is not suppliedboth sensors are furnished with this option formonitoring purposes.

Suction and Discharge Pressure Sensors—provideprotection, control, and monitoring of each refrigerantcircuit. These pressures can be displayed on themicrocomputer for ease of trending and diagnosis ofproblems. The suction pressure switches are removedwhen this option is furnished.

Air Temperature Control Options—One of thefollowing must be selected.

A) Supply Air Temperature Control—Controlscapacity based on a discharge air temperaturesensor and a desired discharge air temperaturesetpoint.

B) Supply Air Temp Control with Zone Sensor—similar to (A) above with an added zonetemperature sensor with override switch. Thezone sensor must be field mounted. This can beused for any of the following functions:

1) Morning warm-up of the zone to a specifiedsetpoint when the building is occupied.

2) Setback of the desired space temperatureduring the unoccupied mode so that coolingwill be initiated if zone temperature getsabove a specified setpoint. Heating could alsobe activated if zone temperature falls belowa setpoint.

3) The override switch can be used to put theunit in occupied mode for a specified lengthof time.

C) Zone Temperature Control—This mode can onlybe used for constant volume systems. Cooling andheating staging is done based on zonetemperature setpoints.

Accessories are shipped loose and must be fieldinstalled.

Fused Disconnect—that is sized for protecting anddisconnecting the unit.

Non-fused Disconnect—that provides the disconnectfunction only. Short circuit protection must be suppliedby other customer supplied device.

Condenser Water Flow Switch—paddle type fieldadjustable flow switch for verification of water flowduring unit operation.

PC Connection Basic—Provides communications to aPC via the RS232 connection port. Allows completeoperation of one package up to 100 feet from the PC.The PC Connect software and a 6' cable will be providedfor use with a remote PC by others. This software willalso allow a PC to dial into a unit with a modem.

PC Connection Enhanced—Provides communicationsto the RS232 port on a PC via an RS485 communicationnetwork. Allows complete operation of up to 20packages up to 5000 feet from the PC (total networkdistance). This option is supplied with a gateway thatconverts the RS485 to RS232 to be located at the PC.The PC Connect software, the gateway, and a 6' cablewill be provided for use with a remote PC by others.

Remote Monitor-Control Terminal—is a stand alonewall-mounted microcomputer that can be used tomonitor or control up to 20 packages. After the desiredpackage is selected, the display and keypad operateidentically to the selected packages display and keypad.

ELECTRICAL ACCESSORIES ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

18

PHYSICAL DATA ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

T/A, 35%, CleanableT/A, 35%, Cleanable, Vericell

Flat

Hi-CapT/A, 35%, Cleanable

Combination FilterMix Box

T/A, 35%, Cleanable

15 20 25 30 35 39Type A 1 Row Face Tube Qty. X Fin Lgth. 40Tx72 40Tx72 40Tx72 40Tx72 40Tx72 40Tx72

H. WaterType 2 Row 25 (FT)2

Type 5 1 Row Face Tube Qty. X Fin Lgth. 30Tx73 30Tx73 30Tx73 30Tx73 30Tx73 30Tx73Steam 2 Row 24.2 (FT)2

Area 27.7 27.7 27.7 27.7 27.7 27.7Qty 8 8 8 8 8 8

Size 2” 20x25x2 20x25x2 20x25x2 20x25x2 20x25x2 20x25x2Size 4” 20x25x4 20x25x4 20x25x4 20x25x4 20x25x4 20x25x4Area 31.9 31.9 31.9 31.9 31.9 31.9

Qty-Size 4-16x25 4-16x25 4-16x25 4-16x25 4-16x25 4-16x25Qty-Size 6-20x25 6-20x25 6-20x25 6-20x25 6-20x25 6-20x25

Area 31.9 31.9 31.9 31.9 31.9 31.9Qty-Size 4-16x25 4-16x25 4-16x25 4-16x25 4-16x25 4-16x25Qty-Size 6-20x25 6-20x25 6-20x25 6-20x25 6-20x25 6-20x25

Area 24 24 24 24 24 24Qty - Size 4 - 24x24 4 - 24x24 4 - 24x24 4 - 24x24 4 - 24x24 4 - 24x24Qty - Size 4 - 12x24 4 - 12x24 4 - 12x24 4 - 12x24 4 - 12x24 4 - 12x24

Type 5 Face Tube Qty. X Fin Lgth. 23T x 72 23T x 72 31T x 72 31T x 72 31T x 72 31T x 72Area (Ft)2 18.3 18.3 24.7 24.7 24.7 24.7

Bag & Cartridge Filter

** The size 20 unit with the Twin A12-9A fan assembly is for lower CFM at high static

Bag = 6” & 12”Cartridge = 21”, 30” & 37”

Model Compressor Fan Fan Motor Evap. CoilPVW/ Steps Fan Minimum- FacePCW Type No. Unloading Type No. Size CFM Maximum Area Rows FPI15 Scroll 2 100-53-0 FC 1 12-12 6000 5 to 15 18.8 3 1220 Scroll 2 100-53-0 FC 2 Twin 12-9** 8000 5 to 20 18.8 3 1220 Scroll 2 100-53-0 FC 2 Twin 12-12 8000 5 to 20 18.8 3 1225 Scroll 2 100-53-0 FC 2 Twin 12-12 10000 5 to 20 25 4 1230 Scroll 2 100-53-0 FC 2 Twin 12-12 12000 5 to 25 25 4 1235 Scroll 2 100-53-0 FC 2 Twin 12-12 14000 7.5 to 25 25 4 1239 Scroll 2 100-53-0 FC 2 Twin 12-12 14500 7.5 to 25 25 4 14

FC = Forward Curved

Hea

tin

g

Co

ilsFi

lter

s

Econ.Coil

Model Size

19

WEIGHTS

Water Cooled—Base Unit Weights with Maximum HP MotorModel Size 15 20 25 30 35 39Net Weight 1724 1780 2370 2880 2938 2958Operating Weight 1888 1944 2533 3043 3101 3121Shipping Weight w/Skid 1849 1905 2745 3004 3063 3083Maximum HP Motor 15 HP 20 HP 20 HP 25 HP 25 HP 25 HP

Air Cooled—Base Unit Weights with Maximum HP MotorNet Weight 1565 1621 1946 2456 2498 2518Operating Weight 1565 1784 2109 2456 2498 2518Shipping Weight w/Skid 1689 1745 2071 2581 2623 2643Maximum HP Motor 15HP 20 HP 20 HP 25 HP 25 HP 25 HP

Base Unit w/Economizer Section (when attached)Net Weight 2802 2802 3392 3849 3908 3928Operating Weight 3188 3188 3778 4236 4294 4314Shipping Weight w/Skid 2962 2962 3551 4009 4067 4087

Economizer Section Weight (w/Coil) 4 Row Coil (when separate)Net Weight 969 969 969 969 969 969Operating Weight 1004 1004 1004 1004 1004 1004Shipping Weight w/skid 1193 1193 1193 1193 1193 1193

Compressor/Condenser Section (when separate)Net Weight Water Cooled 975 975 1239 1283 1339 1339Net Weight Air Cooled 815 815 815 859 899 899

Fan/Coil Section with Maximum HP Motor (when separate)Net Weight (Includes DX Coil) 679 735 1486 1486 1486 1498Maximum HP Motor 15HP 20 HP 20 HP 25 HP 25 HP 25 HP

AccessoriesFlat Filter Section (w/TA Filters) 95 95 95 95 95 95Mix Box 260 260 260 260 260 260Filter Mix Box (w/TA Filters) 300 300 300 300 300 300Angle Filter Section (w/TA Filters) 234 234 234 234 234 234Heating Coil Section 70 70 70 70 70 70Bag/Cartridge Filter Section 274 274 274 274 274 274

Unit Weight Information

DX Coil 15 20 25 30 35 393R/12 FPI 248 2484R/12 FPI 319 319 3194R/14 FPI 320Economizer Coil 15 20 25 30 35 392R/12 FPI Non-Cleanable 265 265 265 265 265 2652R/12 FPI Cleanable 275 275 275 275 275 2754R/12 FPI Non-Cleanable 494 494 494 494 494 4944R/12 FPI Cleanable 514 514 514 514 514 514

Coil Operating Weights

Hot Water Coil Standard Stm Non Freeze Stm1A 121 1W 106 1W 1212A 196 2W 170 2W 1991B 125 1Y 115 1Y 1302B 207 2Y 187 2Y 2161C 129 1A 116 1A 1312C 211 2A 190 2A 2201D 133 1B 124 1B 1382D 219 2B 204 2B 234

1C 130 1C 1452C 218 2C 2471D 37 1D 1522D 232 2D 261

Filters 60%-65% 80%-85% 90%-95%

Cartridge Filter Weights 6" 106 103 11112" 94 91 9921" 40 38 36

Bag Filter Weights 30" 38 36 3437" 46 39 40

Vericell II 4" Filter Weights 44 44 44

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

20

SELECTION PROCEDURE

Figure 1Fan Motor Heat

Fan BHP

MB

H

NOTE: (Interpolation is permitted but do notextrapolate)

Specified:

1. 370 MBH total and 270 MBH sensible gross coolingcapacities.

2. 12,000 CFM at 2.0" ESP and 80° / 67° EAT.

3. 85°-95°F condenser water.

4. High velocity, disposable filters (flat filter rack facearea acceptable).

Water side economizer with 3-way valve package.

Forward curve with inlet vanes.

5. Maximum of 25.0 compressor kW, 16.0 fan BHPand 50 feet water pressure drop (economizer pluscondenser).

6. Economizer capacity of 220 MBH at 55°Feconomizer EWT.

Selection

1. Capacity tables are found on pages 21-23. Thesetables indicate capacity at various condensing watertemperatures. Figure 5 indicates a PVW/PCW 30provides 373 total MBH and a 75% sensible heatratio at 85-95°F water temperature and specifiedentering air conditions.

Sensible Capacity = (.753) (373) = 280 MBH.

Both total and sensible PVW/PCW 30 capacitiessatisfy specified requirements.

2. Compressor kW is found in Figure 31, p. 43, to be20.9 kW at these conditions. This does not exceedthe specified maximum (30.0 kW).

3. GPM = MBH+(3.41)(kW) = 373+(3.41)(20.9) = 89(.5) (�T) (.5) (10)

4. Component air pressure drop is found in Figure 26,page 33. These internal static pressures must beadded to external static pressure to find total staticpressure.

PVW/PCW 30 values are listed below at the specifiedCFM (12,000).

.62 DX coil (wet)+ .23 Filters (clean)+ .42 Economizer (wet)+ 2.00 ESP

3.27" TSP

5. Fan curves are found on pages 30-32. Figure 21indicates the PVW/PCW 30 fan with inlet vanesrequires 15.3 BHP and 1690 RPM at designconditions. Required BHP does not exceed the 16BHP specified maximum.

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

6. Capacity tables do not reflect fan and motor heat.The entire fan motor electrical input must beconsidered a sensible heat gain within the supplyduct work and taken into account in the designerscooling load calculations. The chart below indicatesfan motor heat (in MBH) based on fan BHP. For the15.3 BHP requirement, in this example, 40.2 MBHfan and motor heat is generated.

7. Economizer capacity is found on pages 24-29.Figure 15 indicates a PVW/PCW 30 economizerprovides sufficient capacity (232 MBH) at 55°F EWTand 93 GPM condenser water. This same figureindicates an economizer coil water pressure dropof 4 feet at 93 GPM.

8. Economizer valve water pressure drop is found inFigure 28, page 34 and is a relatively constant valueregardless of valve position. Economizer valvepressure drop also includes all internal, PVW/PCW,water piping losses. Figure 28 indicates 9.4 feet ofhead loss, at 93 GPM, with a 2 1/2” value.

9. Condenser water pressure drop is found in Figure29 on page 34. The PVW/PCW 30 condenser waterlosses are 10.8 feet at 95 GPM.

10. Total unit water pressure drop is the sum ofcondenser, economizer and valve losses. PVW/PCW30 values are listed below at design GPM and donot exceed the specified maximum (50 feet waterheat).

4.0 Economizer+ 16.4 Condenser+ 9.0 Economizer Valve

29.4 Total Water Pressure Drop

11. Steam or hot water coil selections can be done usingcoil catalogs bulletins 6001-13, 6001-12, and6001-8. Heating coil dimensions and maximumnumber of rows are provided on page 14.

21

PERFORMANCE DATA: DX

Cond.Water 75°F DB 80°F DB 85°F DB

CFM °F Cap. 64° WB 67° WB 70° WB 64° WB 67° WB 70° WB 64° WB 67° WB 70° WBMBH 195 206 218 195 206 218 195 206 217

75-85 SHR 0.65 0.546 0.445 0.773 0.662 0.554 0.894 0.779 0.664kW 10.7 10.8 10.8 10.7 10.8 10.8 10.7 10.8 10.8

MBH 189 199 211 189 199 210 189 199 2105,000 85-95 SHR 0.658 0.551 0.445 0.784 0.671 0.559 0.909 0.792 0.679

kW 12 12 12.1 12 12 12 12 12 12.1MBH 182 193 204 182 193 204 183 193 204

95-105 SHR 0.665 0.555 0.446 0.796 0.678 0.57 0.925 0.802 0.688kW 13.4 13.4 13.5 13.4 13.4 13.5 13.4 13.4 13.5

MBH 202 213 225 202 213 225 199 213 22575-85 SHR 0.675 0.56 0.453 0.817 0.692 0.578 1 0.824 0.703

kW 10.8 10.8 10.9 10.8 10.8 10.9 10.7 10.8 10.9MBH 195 206 217 195 206 217 193 206 217

6,000 85-95 SHR 0.683 0.563 0.452 0.829 0.7 0.582 1 0.837 0.712kW 12 12 12.1 12 12 12.1 12 12 12.1

MBH 189 199 210 188 199 210 188 199 21095-105 SHR 0.698 0.574 0.46 0.857 0.715 0.594 1 0.857 0.727

kW 13.4 13.5 13.5 13.4 13.4 13.5 13.4 13.4 13.5MBH 207 218 230 207 218 230 208 218 230

75-85 SHR 0.703 0.583 0.464 0.868 0.731 0.605 1 0.879 0.745kW 10.8 10.8 10.9 10.8 10.8 10.9 10.8 10.8 10.9

MBH 200 211 222 200 211 222 203 211 2227,000 85-95 SHR 0.729 0.595 0.472 0.889 0.748 0.616 1 0.9 0.763

kW 12 12.1 12.1 12 12 12.1 12 12.1 12.1MBH 193 204 215 193 203 215 197 204 215

95-105 SHR 0.735 0.596 0.469 0.902 0.756 0.619 1 0.911 0.77kW 13.4 13.5 13.5 13.4 13.5 13.5 13.4 13.5 13.5

MBH = 1000 BTUHSHR = Sensible Heat RatioR-22 RefrigerantkW is for compressor only, fan motor; kW must be added for total kWContact factory for air-cooled ratings



75-85 SHR 0.671 0.558 0.455 0.807 0.686 0.576 1 0.815 0.699kW 13 13.1 13.2 13 13.1 13.1 13 13.1 13.1

MBH 232 244 257 231 244 257 227 244 2577,000 85-95 SHR 0.676 0.561 0.454 0.818 0.693 0.58 1 0.827 0.706

kW 14.6 14.7 14.7 14.6 14.7 14.7 14.6 14.7 14.7MBH 223 236 248 223 235 248 221 235 248

95-105 SHR 0.685 0.565 0.455 0.831 0.702 0.585 1 0.842 0.715kW 16.4 16.4 16.5 16.4 16.5 16.5 16.4 16.5 16.5

MBH 244 257 271 244 257 271 244 257 27175-85 SHR 0.705 0.574 0.452 0.854 0.715 0.594 1 0.865 0.728

kW 13 13.1 13.2 13 13.1 13.2 13 13.1 13.2MBH 237 249 263 236 249 263 237 249 262

8,000 85-95 SHR 0.71 0.584 0.458 0.865 0.73 0.605 1 0.876 0.745kW 14.6 14.7 14.8 14.6 14.7 14.8 14.6 14.7 14.7

MBH 228 240 253 228 240 253 230 240 25295-105 SHR 0.72 0.588 0.466 0.879 0.739 0.61 1 0.89 0.755

kW 16.4 16.5 16.6 16.4 16.5 16.6 16.4 16.5 16.6MBH 249 262 276 248 262 276 252 262 276

75-85 SHR 0.732 0.589 0.466 0.894 0.752 0.613 1 0.906 0.768kW 13.1 13.1 13.2 13.1 13.1 13.2 13.1 13.1 13.2

MBH 240 254 267 241 253 267 246 254 2669,000 85-95 SHR 0.738 0.599 0.472 0.904 0.758 0.624 1 0.916 0.776

kW 14.6 14.7 14.8 14.7 14.7 14.8 14.7 14.7 14.8MBH 232 244 257 232 244 257 239 244 256

95-105 SHR 0.744 0.602 0.471 0.919 0.768 0.627 1 0.932 0.786kW 16.4 16.5 16.6 16.4 16.5 16.6 16.5 16.5 16.6

Entering Air Temperature

Model PVW/PCW 20


○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 3

Figure 2Model PVW/PCW 15

22

PERFORMANCE DATA: DX (CONT.)



75-85 SHR 0.705 0.573 0.459 0.854 0.713 0.593 1 0.863 0.727kW 14.5 14.6 14.6 14.5 14.6 14.6 14.5 14.6 14.6

MBH 293 310 327 294 310 327 296 310 3279,000 85-95 SHR 0.712 0.583 0.466 0.865 0.73 0.604 1 0.875 0.743

kW 16.2 16.3 16.4 16.3 16.3 16.4 16.2 16.3 16.4MBH 283 299 315 283 298 315 287 298 314

95-105 SHR 0.721 0.587 0.466 0.879 0.739 0.609 1 0.89 0.754kW 18.3 18.3 18.4 18.3 18.3 18.3 18.3 18.3 18.4

MBH 309 326 344 309 326 344 314 326 34375-85 SHR 0.727 0.594 0.471 0.888 0.747 0.616 1 0.898 0.762

kW 14.5 14.6 14.6 14.5 14.6 14.7 14.5 14.6 14.7MBH 298 315 332 299 314 332 306 315 332

10,000 85-95 SHR 0.734 0.595 0.469 0.899 0.755 0.619 1 0.91 0.769kW 16.3 16.3 16.4 16.3 16.3 16.4 16.3 16.3 16.4

MBH 287 303 320 288 303 320 297 304 31995-105 SHR 0.742 0.599 0.467 0.914 0.764 0.633 1 0.935 0.79

kW 18.2 18.3 18.4 18.2 18.3 18.4 18.3 18.3 18.4MBH 313 330 348 314 330 348 323 331 348

75-85 SHR 0.744 0.601 0.468 0.914 0.766 0.635 1 0.936 0.791kW 14.5 14.6 14.7 14.5 14.6 14.7 14.6 14.6 14.7

MBH 302 319 336 303 318 336 315 315 33611,000 85-95 SHR 0.76 0.612 0.475 0.946 0.783 0.647 1 1 0.809

kW 16.3 16.4 16.4 16.3 16.3 16.4 16.3 16.3 16.4MBH 291 307 324 288 307 323 305 305 323

95-105 SHR 0.779 0.625 0.483 1 0.802 0.651 1 1 0.82kW 18.3 18.3 18.4 18.3 18.3 18.4 18.3 18.3 18.4




75-85 SHR 0.697 0.572 0.456 0.847 0.715 0.592 1 0.857 0.729kW 18.8 19 19.1 18.8 19 19.1 18.8 18.9 19.1

MBH 350 369 389 349 369 389 353 369 38811,000 85-95 SHR 0.71 0.582 0.463 0.876 0.73 0.603 1 0.885 0.744

kW 20.8 20.9 21 20.8 20.9 21 20.8 20.9 21.1MBH 337 356 375 337 355 375 342 355 374

95-105 SHR 0.728 0.594 0.472 0.889 0.748 0.617 1 0.9 0.763kW 23.1 23.2 23.3 23.1 23.2 23.3 23.1 23.2 23.3

MBH 366 386 407 367 386 407 372 386 40675-85 SHR 0.727 0.592 0.47 0.886 0.745 0.615 1 0.898 0.761

kW 18.9 19 19.2 18.8 19 19.2 18.9 19 19.1MBH 354 374 394 354 373 393 362 374 393

12,000 85-95 SHR 0.732 0.593 0.467 0.897 0.753 0.618 1.001 0.908 0.768kW 20.8 20.9 21.1 20.8 20.9 21.1 20.9 20.9 21.1

MBH 341 360 379 342 359 379 352 361 37995-105 SHR 0.739 0.597 0.476 0.91 0.762 0.631 1 0.932 0.787

kW 23.1 23.2 23.3 23.1 23.2 23.3 23.2 23.2 23.3MBH 370 390 412 371 390 411 381 391 411

75-85 SHR 0.733 0.602 0.471 0.913 0.765 0.626 1 0.934 0.791kW 18.9 19 19.2 18.9 19 19.2 19 19 19.2

MBH 358 378 398 359 377 397 371 371 39713,000 85-95 SHR 0.758 0.612 0.478 0.933 0.782 0.638 1 0.965 0.798

kW 20.9 21 21.1 20.9 21 21.1 20.9 20.9 21.1MBH 345 364 384 340 363 383 360 360 382

95-105 SHR 0.766 0.615 0.475 0.964 0.79 0.652 1 0.974 0.818kW 23.1 23.2 23.4 23.1 23.3 23.4 23.2 23.3 23.4


Model PVW/PCW 30


Figure 4

Figure 5

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Model PVW/PCW 25

23

PERFORMANCE DATA: DX (CONT.)



75-85 SHR 0.698 0.576 0.455 0.846 0.717 0.596 1 0.856 0.729kW 23.3 23.4 23.6 23.3 23.4 23.6 23.3 23.5 23.6

MBH 416 439 463 416 439 463 418 438 46213,000 85-95 SHR 0.705 0.578 0.462 0.858 0.723 0.599 1 0.868 0.738

kW 26.1 26.2 26.3 26.1 26.1 26.2 26.1 26.2 26.3MBH 400 423 445 400 422 445 405 422 445

95-105 SHR 0.715 0.583 0.463 0.873 0.734 0.605 1 0.884 0.748kW 29.2 29.3 29.4 29.2 29.3 29.4 29.2 29.3 29.4

MBH 436 460 484 436 459 484 439 459 48375-85 SHR 0.711 0.583 0.464 0.876 0.731 0.605 1 0.879 0.746

kW 23.4 23.5 23.6 23.4 23.5 23.6 23.4 23.5 23.6MBH 421 444 468 421 444 468 427 444 467

14,000 85-95 SHR 0.727 0.594 0.471 0.888 0.747 0.616 1 0.9 0.763kW 26.1 26.2 26.3 26.1 26.2 26.3 26.1 26.2 26.3

MBH 405 427 450 405 427 450 414 427 45095-105 SHR 0.737 0.598 0.471 0.904 0.757 0.622 1 0.916 0.773

kW 29.2 29.3 29.4 29.2 29.3 29.4 29.3 29.3 29.4MBH 441 464 489 441 464 489 448 464 488

75-85 SHR 0.721 0.586 0.462 0.885 0.743 0.619 1 0.907 0.768kW 23.4 23.5 23.6 23.4 23.5 23.6 23.4 23.5 23.7

MBH 425 448 472 425 448 472 436 449 47215,000 85-95 SHR 0.747 0.597 0.478 0.916 0.769 0.631 1 0.929 0.785

kW 26.1 26.2 26.3 26.1 26.2 26.3 26.2 26.2 26.3MBH 409 431 454 409 431 454 423 432 454

95-105 SHR 0.756 0.611 0.477 0.932 0.78 0.637 1 0.944 0.796kW 29.2 29.3 29.5 29.2 29.3 29.5 29.3 29.3 29.4




75-85 SHR 0.707 0.581 0.464 0.859 0.726 0.603 1 0.87 0.741kW 23.5 23.6 23.8 23.5 23.6 23.8 23.5 23.6 23.8

MBH 445 469 495 446 469 494 452 470 49414,000 85-95 SHR 0.713 0.583 0.462 0.87 0.733 0.605 1 0.881 0.748

kW 26.2 26.3 26.5 26.2 26.3 26.5 26.2 26.3 26.5MBH 428 452 476 429 451 475 438 453 475

95-105 SHR 0.723 0.587 0.462 0.886 0.743 0.62 1 0.905 0.768kW 29.3 29.4 29.6 29.3 29.4 29.6 29.4 29.4 29.6

MBH 465 490 516 466 490 516 474 492 51675-85 SHR 0.727 0.595 0.463 0.887 0.748 0.618 1 0.898 0.763

kW 23.5 23.7 23.8 23.5 23.7 23.8 23.6 23.7 23.8MBH 449 474 499 451 473 498 461 476 498

15,000 85-95 SHR 0.734 0.596 0.47 0.898 0.756 0.621 1 0.91 0.772kW 26.2 26.3 26.5 26.2 26.3 26.5 26.3 26.4 26.5

MBH 432 456 480 434 455 480 447 458 48095-105 SHR 0.744 0.6 0.469 0.913 0.766 0.625 1 0.935 0.791

kW 29.3 29.4 29.6 29.3 29.4 29.6 29.4 29.5 29.6MBH 470 495 521 471 494 521 483 497 520

75-85 SHR 0.746 0.607 0.478 0.913 0.768 0.631 1 0.924 0.784kW 23.5 23.7 23.9 23.6 23.7 23.9 23.6 23.7 23.9

MBH 453 478 504 455 477 503 470 481 50316,000 85-95 SHR 0.752 0.607 0.475 0.924 0.775 0.633 1 0.936 0.791

kW 26.2 26.4 26.5 26.2 26.4 26.5 26.3 26.4 26.5MBH 436 460 484 439 460 484 455 455 484

95-105 SHR 0.761 0.611 0.483 0.938 0.784 0.648 1 1 0.813kW 29.4 29.5 29.6 29.3 29.5 29.6 29.5 29.4 29.6


Model PVW/PCW 39


Figure 6

Figure 7

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Model PVW/PCW 35

24

PERFORMANCE DATA: ECONOMIZER



45 SHR 0.752 0.582 0.458 0.918 0.732 0.586 1 0.886 0.715WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9

5,000 MBH 64 80 103 80 80 102 96 96 10455 SHR 1 0.746 0.505 1 1 0.712 1 1 0.912

WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8MBH 32 32 36 48 48 48 64 64 64

65 SHR 1 1 0.866 1 1 1 1 1 1WPD 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7MBH 126 151 175 123 150 175 141 152 174

45 SHR 0.772 0.603 0.465 1 0.768 0.604 1 0.915 0.744WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9

6,000 MBH 71 85 110 89 89 109 106 107 10755 SHR 1 0.777 0.523 1 1 0.75 1 1 1

WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8MBH 36 36 39 54 54 54 72 72 72

65 SHR 1 1 0.935 1 1 1 1 1 1WPD 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7MBH 133 158 184 134 158 184 153 153 183

45 SHR 0.807 0.609 0.463 1 0.785 0.613 1 1 0.765WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9

7,000 MBH 77 89 115 97 97 114 116 116 11655 SHR 1 0.82 0.536 1 1 0.792 1 1 1

WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8MBH 39 39 39 59 59 59 78 78 78

65 SHR 1 1 1 1 1 1 1 1 1WPD 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7



45 SHR 0.7 0.556 0.438 0.834 0.681 0.545 1 0.796 0.659WPD 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4MBH 89 119 153 111 123 153 133 133 156

5,000 55 SHR 1 0.685 0.485 1 0.871 0.654 1 1 0.817WPD 2.4 2.4 2.3 2.3 2.3 2.3 2.3 2.3 2.3MBH 45 45 54 67 67 67 89 89 89

65 SHR 1 1 0.777 1 1 1 1 1 1WPD 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3MBH 191 226 264 196 227 263 202 231 264

45 SHR 0.72 0.564 0.448 0.876 0.706 0.564 1 0.826 0.679WPD 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4MBH 101 129 165 127 127 166 152 152 171

6,000 55 SHR 1 0.705 0.497 1 1 0.679 1 1 0.847WPD 2.4 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3MBH 51 51 59 76 76 76 102 102 102

65 SHR 1 1 0.806 1 1 1 1 1 1WPD 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3MBH 205 242 281 212 243 281 224 249 282

45 SHR 0.735 0.583 0.453 0.895 0.726 0.579 1 0.865 0.702WPD 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4MBH 113 138 175 141 141 176 169 169 185

7,000 55 SHR 1 0.745 0.515 1 1 0.711 1 1 0.881WPD 2.4 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3MBH 57 57 64 85 85 85 113 113 113

65 SHR 1 1 0.83 1 1 1 1 1 1WPD 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3



○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 8

Figure 9

Economizer Rating PVW/PCW 15 - 2 Row51 GPM


25

PERFORMANCE DATA: ECONOMIZER (CONT.)



45 SHR 0.777 0.597 0.458 1 0.762 0.607 1 0.922 0.747WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 80 96 123 100 100 122 120 120 120

7,000 55 SHR 1 0.783 0.526 1 1 0.754 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9MBH 40 40 43 60 60 61 81 81 81

65 SHR 1 1 0.946 1 1 1 1 1 1WPD 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8MBH 149 177 207 149 176 206 171 171 205

45 SHR 0.804 0.615 0.469 1 0.791 0.618 1 1 0.77WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 86 100 129 108 108 128 129 129 129

8,000 55 SHR 1 0.817 0.547 1 1 0.787 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9MBH 43 43 43 65 65 65 87 87 87

65 SHR 1 1 1 1 1 1 1 1 1WPD 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8MBH 155 184 214 159 183 214 182 182 213

45 SHR 0.825 0.629 0.468 1 0.816 0.625 1 1 0.787WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 92 104 133 115 115 133 138 138 138

9,000 55 SHR 1 0.843 0.565 1 1 0.82 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9MBH 46 46 46 69 69 69 93 93 93

65 SHR 1 1 1 1 1 1 1 1 1WPD 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8



45 SHR 0.728 0.562 0.452 0.87 0.698 0.57 1 0.835 0.687WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4MBH 116 147 188 145 145 188 174 174 195

7,000 55 SHR 1 0.712 0.502 1 1 0.688 1 1 0.857WPD 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3MBH 58 58 67 87 87 87 116 116 116

65 SHR 1 1 0.818 1 1 1 1 1 1WPD 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2MBH 231 273 318 238 274 318 252 281 318

45 SHR 0.735 0.582 0.452 0.898 0.726 0.578 1 0.858 0.702WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4MBH 127 156 199 158 158 199 190 190 208

8,000 55 SHR 1 0.745 0.512 1 1 0.71 1 1 0.884WPD 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3MBH 64 64 72 96 96 96 127 127 127

65 SHR 1 1 0.833 1 1 1 1 1 1WPD 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2MBH 243 286 333 237 287 332 271 296 334

45 SHR 0.758 0.591 0.456 1 0.751 0.59 1 0.886 0.727WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4MBH 137 163 207 171 171 209 205 205 220

9,000 55 SHR 1 0.757 0.52 1 1 0.741 1 1 0.916WPD 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3MBH 69 69 75 103 103 103 138 138 138

65 SHR 1 1 0.878 1 1 1 1 1 1WPD 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2



○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 10

Figure 11



26




45 SHR 0.778 0.598 0.459 1 0.763 0.608 1 0.923 0.749WPD 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6MBH 104 124 160 130 130 159 156 156 156

9,000 55 SHR 1 0.784 0.527 1 1 0.755 1 1 1WPD 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5MBH 52 52 56 78 78 79 105 105 105

65 SHR 1 1 0.946 1 1 1 1 1 1WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4MBH 191 228 265 191 227 265 218 231 263

45 SHR 0.794 0.618 0.464 1 0.791 0.611 1 0.943 0.761WPD 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6MBH 110 128 165 138 138 164 165 165 165

10,000 55 SHR 1 0.806 0.541 1 1 0.779 1 1 1WPD 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5MBH 56 56 59 83 83 83 111 111 111

65 SHR 1 1 0.945 1 1 1 1 1 1WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4MBH 198 235 273 201 234 273 229 229 271

45 SHR 0.829 0.626 0.477 1 0.807 0.63 1 1 0.788WPD 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6MBH 116 133 170 145 145 169 174 174 174

11,000 55 SHR 1 0.825 0.551 1 1 0.8 1 1 1WPD 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5MBH 58 58 59 88 88 88 117 117 117

65 SHR 1 1 1 1 1 1 1 1 1WPD 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4



45 SHR 0.727 0.561 0.452 0.869 0.697 0.569 1 0.834 0.686WPD 3 3 3 3 3 3 3 3 3MBH 150 190 243 187 187 243 224 224 252

9,000 55 SHR 1 0.712 0.502 1 1 0.688 1 1 0.857WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9MBH 75 75 87 113 113 113 150 150 150

65 SHR 1 1 0.817 1 1 1 1 1 1WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8MBH 295 349 406 304 349 405 320 358 406

45 SHR 0.745 0.574 0.446 0.887 0.716 0.57 1 0.855 0.7WPD 3 3 3 3 3 3 3 3 3MBH 161 199 253 201 201 254 241 241 265

10,000 55 SHR 1 0.735 0.505 1 1 0.713 1 1 0.884WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9MBH 81 81 91 121 121 121 162 162 162

65 SHR 1 1 0.857 1 1 1 1 1 1WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8MBH 307 362 421 319 364 420 340 374 423

45 SHR 0.759 0.585 0.453 0.912 0.732 0.583 1 0.875 0.717WPD 3 3 3 3 3 3 3 3 3MBH 171 207 262 214 214 264 257 257 278

11,000 55 SHR 1 0.739 0.519 1 1 0.721 1 1 0.907WPD 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9MBH 86 86 96 129 129 129 172 172 172

65 SHR 1 1 0.855 1 1 1 1 1 1WPD 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8



○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 12

Figure 13



27




45 SHR 0.805 0.609 0.466 1 0.78 0.61 1 0.933 0.757WPD 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9MBH 120 141 181 149 149 180 179 179 179

11,000 55 SHR 1 0.795 0.532 1 1 0.768 1 1 1WPD 4.8 4.8 4.7 4.8 4.8 4.7 4.7 4.7 4.7MBH 60 60 60 90 90 90 121 121 121

65 SHR 1 1 1 1 1 1 1 1 1WPD 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6MBH 216 257 299 217 256 299 248 248 297

45 SHR 0.815 0.613 0.466 1 0.79 0.617 1 1 0.772WPD 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9MBH 125 145 186 157 157 185 188 188 188

12,000 55 SHR 1 0.828 0.539 1 1 0.784 1 1 1WPD 4.8 4.8 4.7 4.8 4.8 4.7 4.7 4.7 4.7MBH 63 63 63 95 95 95 127 127 127

65 SHR 1 1 1 1 1 1 1 1 1WPD 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6MBH 222 264 306 226 262 306 259 259 304

45 SHR 0.821 0.626 0.476 1 0.812 0.633 1 1 0.793WPD 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9 4.9MBH 131 149 191 163 163 190 196 196 196

13,000 55 SHR 1 0.84 0.562 1 1 0.816 1 1 1WPD 4.8 4.7 4.7 4.8 4.7 4.7 4.7 4.7 4.7MBH 66 66 66 99 99 99 132 132 132

65 SHR 1 1 1 1 1 1 1 1 1WPD 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6



45 SHR 0.738 0.567 0.455 0.891 0.718 0.578 1 0.849 0.7WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 176 219 280 220 220 280 264 264 291

11,000 55 SHR 1 0.726 0.51 1 1 0.704 1 1 0.879WPD 4 4 4 4 4 4 4 4 4MBH 88 88 100 132 132 132 177 177 177

65 SHR 1 1 0.848 1 1 1 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9MBH 337 399 465 348 400 464 369 409 465

45 SHR 0.748 0.583 0.451 0.913 0.729 0.587 1 0.865 0.713WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 186 227 290 232 232 291 279 279 303

12,000 55 SHR 1 0.742 0.509 1 1 0.71 1 1 0.898WPD 4 4 4 4 4 4 4 4 4MBH 94 94 105 140 140 140 187 187 187

65 SHR 1 1 0.845 1 1 1 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9MBH 349 411 479 340 413 478 389 425 480

45 SHR 0.757 0.589 0.455 1 0.749 0.596 1 0.886 0.726WPD 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1MBH 196 235 298 245 245 300 294 294 315

13,000 55 SHR 1 0.756 0.518 1 1 0.739 1 1 0.917WPD 4 4 4 4 4 4 4 4 4MBH 98 98 108 148 148 148 197 197 197

65 SHR 1 1 0.878 1 1 1 1 1 1WPD 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9 3.9



○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 14

Figure 15



28




45 SHR 0.798 0.61 0.465 1 0.784 0.613 1 1 0.763WPD 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7MBH 135 157 203 168 168 201 202 202 202

13,000 55 SHR 1 0.812 0.542 1 1 0.783 1 1 1WPD 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5MBH 68 68 68 102 102 102 136 136 136

65 SHR 1 1 1 1 1 1 1 1 1WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3MBH 240 286 334 243 285 333 278 278 331

45 SHR 0.826 0.622 0.473 1 0.803 0.626 1 1 0.782WPD 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7MBH 140 161 208 175 175 206 210 210 210

14,000 55 SHR 1 0.82 0.547 1 1 0.797 1 1 1WPD 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5MBH 71 71 71 106 106 106 141 141 141

65 SHR 1 1 1 1 1 1 1 1 1WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3MBH 246 293 340 252 291 340 288 288 338

45 SHR 0.828 0.62 0.47 1 0.807 0.628 1 1 0.789WPD 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7MBH 145 165 212 182 182 210 218 218 218

15,000 55 SHR 1 0.83 0.565 1 1 0.824 1 1 1WPD 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5MBH 73 73 73 110 110 110 147 147 147

65 SHR 1 1 1 1 1 1 1 1 1WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3



45 SHR 0.736 0.581 0.451 0.902 0.726 0.576 1 0.862 0.701WPD 5.7 5.6 5.6 5.7 5.6 5.6 5.6 5.6 5.6MBH 201 249 317 251 251 318 301 301 330

13,000 55 SHR 1 0.744 0.511 1 1 0.709 1 1 0.888WPD 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5MBH 101 101 114 152 152 152 202 202 202

65 SHR 1 1 0.835 1 1 1 1 1 1WPD 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3MBH 380 450 525 393 450 523 419 461 524

45 SHR 0.762 0.585 0.452 0.91 0.734 0.582 1 0.881 0.71WPD 5.7 5.6 5.6 5.7 5.6 5.6 5.7 5.6 5.6MBH 211 256 327 263 263 327 316 316 342

14,000 55 SHR 1 0.741 0.517 1 1 0.724 1 1 0.915WPD 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5MBH 106 106 117 159 159 159 212 212 212

65 SHR 1 1 0.864 1 1 1 1 1 1WPD 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3MBH 391 462 538 406 463 537 437 477 539

45 SHR 0.766 0.587 0.46 0.935 0.75 0.595 1 0.889 0.726WPD 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6MBH 220 264 335 275 275 336 330 330 353

15,000 55 SHR 1 0.766 0.523 1 1 0.735 1 1 0.929WPD 5.5 5.5 5.4 5.5 5.5 5.4 5.5 5.5 5.4MBH 111 111 121 166 166 166 222 222 222

65 SHR 1 1 0.889 1 1 1 1 1 1WPD 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3



○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 16

Figure 17



29




45 SHR 0.806 0.609 0.465 1 0.78 0.61 1 0.937 0.757WPD 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5MBH 136 160 207 170 170 206 204 204 204

13,000 55 SHR 1 0.797 0.532 1 1 0.767 1 1 1WPD 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2MBH 69 69 69 103 103 103 137 137 137

65 SHR 1 1 1 1 1 1 1 1 1WPD 7 7 7 7 7 7 7 7 7MBH 245 292 340 246 290 340 281 281 338

45 SHR 0.81 0.609 0.464 1 0.787 0.613 1 1 0.765WPD 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5MBH 142 164 212 177 177 210 213 213 213

14,000 55 SHR 1 0.824 0.536 1 1 0.781 1 1 1WPD 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2MBH 71 71 71 107 107 107 143 143 143

65 SHR 1 1 1 1 1 1 1 1 1WPD 7 7 7 7 7 7 7 7 7MBH 251 299 348 255 297 347 291 291 345

45 SHR 0.824 0.629 0.469 1 0.813 0.633 1 1 0.791WPD 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5MBH 147 168 217 184 184 215 220 220 220

15,000 55 SHR 1 0.832 0.554 1 1 0.808 1 1 1WPD 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2MBH 74 74 74 111 111 111 148 148 148

65 SHR 1 1 1 1 1 1 1 1 1WPD 7 7 7 7 7 7 7 7 7



45 SHR 0.742 0.57 0.449 0.89 0.713 0.572 1 0.858 0.704WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3MBH 202 253 324 253 253 324 304 304 335

13,000 55 SHR 1 0.732 0.513 1 1 0.709 1 1 0.887WPD 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1MBH 102 102 116 153 153 153 204 204 204

65 SHR 1 1 0.855 1 1 1 1 1 1WPD 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9MBH 387 460 536 399 459 535 423 469 534

45 SHR 0.748 0.581 0.458 0.916 0.729 0.586 1 0.868 0.713WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3MBH 213 261 333 266 266 334 319 319 347

14,000 55 SHR 1 0.742 0.508 1 1 0.71 1 1 0.903WPD 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1MBH 107 107 119 160 160 160 214 214 214

65 SHR 1 1 0.85 1 1 1 1 1 1WPD 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9MBH 399 472 549 413 472 548 442 484 549

45 SHR 0.752 0.592 0.458 0.921 0.745 0.591 1 0.884 0.721WPD 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3MBH 222 268 343 278 278 343 333 333 359

15,000 55 SHR 1 0.752 0.525 1 1 0.734 1 1 0.915WPD 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1 6.1MBH 112 112 123 168 168 168 224 224 224

65 SHR 1 1 0.874 1 1 1 1 1 1WPD 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9



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30

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Forward Curved with Inlet VanesPVW 15 (Single 12-12 fan)

Twin Forward Curved with Inlet VanesPVW 20-39 (Twin 12-12 fan)

31

FAN CURVES (CONT.)

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32

FAN CURVES (CONT.)

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33

AIR PRESSURE DROP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

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Figure 27

Model Coil Flat Filter Angle FilterPVW/ Evap. Econ. Econ. TA 35% 35% Vericell II Vericell II Vericell II TA 35%PCW CFM DX 2 Row 4 Row 2" 2" 4" 65% 85% 95% 2" 2"

5000 0.19 0.15 0.31 0.054 0.075 0.06 0.11 0.16 0.18 0.027 0.00715 6000 0.26 0.200 0.410 0.06 0.076 0.062 0.12 0.20 0.22 0.050 0.065

7000 0.33 0.260 0.520 0.081 0.8 0.7 0.13 0.22 0.26 0.065 0.0767000 0.33 0.260 0.520 0.081 0.8 0.7 0.13 0.22 0.26 0.065 0.076

20 8000 0.41 0.320 0.630 0.11 0.12 0.09 0.17 0.26 0.31 0.081 0.089000 0.49 0.380 0.750 0.13 0.14 0.11 0.21 0.31 0.37 0.100 0.119000 0.39 0.130 0.250 0.13 0.14 0.11 0.21 0.31 0.37 0.100 0.11

25 10000 0.46 0.150 0.300 0.16 0.17 0.13 0.24 0.36 0.43 0.120 0.1311000 0.54 0.180 0.360 0.19 0.21 0.17 0.28 0.41 0.48 0.185 0.1411000 0.54 0.180 0.360 0.19 0.21 0.17 0.28 0.41 0.48 0.185 0.14

30 12000 0.62 0.210 0.420 N/A 0.23 0.18 0.30 0.45 0.52 N/A 0.1613000 0.70 0.240 0.480 N/A 0.27 0.22 0.35 0.52 0.60 N/A 0.2113000 0.70 0.240 0.480 N/A 0.27 0.22 0.35 0.52 0.60 N/A 0.21

35 14000 0.79 0.280 0.550 N/A 0.3 0.25 0.40 0.59 0.68 N/A 0.2515000 0.88 0.310 0.620 N/A N/A 0.28 0.45 0.67 0.78 N/A 0.27

39 14000 0.79 0.280 0.550 N/A 0.3 0.25 0.40 0.59 0.68 N/A 0.2515000 0.88 0.310 0.620 N/A N/A 0.28 0.45 0.67 0.78 N/A 0.27

Vericell II filters can only be used in a 4” flat filter section.

Air Velocity Ft/Min.Description 200 250 300 350 400 450 500 550 600

Filters — Bag 55% - 65%Bag Depth

21" 0.12 0.16 0.21 0.26 0.32 0.38 0.45 N/A N/A30" N/A N/A 0.19 0.24 0.28 0.33 0.37 0.41 0.4437" N/A N/A 0.15 0.21 0.26 0.32 0.38 0.45 0.52

Filters — Bag 80% - 85%

Bag Depth21" 0.14 0.2 0.26 0.32 0.38 0.44 0.51 N/A N/A30" N/A N/A 0.23 0.28 0.34 0.4 0.47 0.51 0.5537" N/A N/A 0.15 0.21 0.26 0.32 0.38 0.45 0.52

Filters — Bag 90% - 95%

Bag Depth21" 0.2 0.28 0.36 0.44 0.52 0.61 0.7 N/A N/A30" N/A N/A 0.32 0.39 0.46 0.53 0.6 0.66 0.7237" N/A N/A 0.22 0.29 0.36 0.44 0.54 0.6 0.68

Cartridge 60% - 65%

Bag Depth6" 0.15 0.2 0.26 0.33 N/A N/A N/A N/A N/A12" N/A N/A 0.22 0.28 0.34 0.41 0.5 0.58 0.68

Cartridge 80% - 85%


Cartridge 90% - 95%


NOTES:

Filter pressure drop is based on the air velocity thru clean filters.

Filter velocity = CFM / filter face area

** 21" bag --- 8 Pocket

**30" & 37" bag -- 6 Pocket

Air pressure drop is expressed as Inches of Water.

34

PRESSURE DROP CURVES ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Figure 28

Figure 29

Flow Rate (GPM)

30 40 50 60 70 80 90 100 120 150

1

2

3

4

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10

20

30

40

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Dro

p (

ft. w

.g.)

Flow Rate (GPM)

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1

2

3

4

56789

10

20

30

40

Pres

sure

Dro

p (

ft. w

.g.)

Models 15-20

Models 25-30

Models 35-39

Condenser Pressure Drop

2” Valve

2.5” V

alve

Valve & Piping Pressure Drop

35

APPLICATION INFORMATION ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Compressor andFan Access

ReturnAir

C

A

D

B

Condenser Tube Pulling

B CSizes

15 thru 20 63” 63”

Sizes25 thru 39 40” 40”

Location & ClearanceA = 24" (15,OOO cfm)B = 6" minimum except as noted below.

24" with R.H. water connections and water economizeroption.See table below if condenser tube pulling is desired.

C = 24" minimum except as noted below.See table below if condenser tube pulling is desired.

D = 42" (Local codes prevail on front control box option.)

Condenser tube pulling clearances may be desirable in eitherthe B or C direction. This service requirement is rarelyencountered.

The cover panels on all four sides are easily removable foraccess so that the unit may be installed with minimum serviceclearance. Quick operating latches are adjustable for tension.

Acoustical ConsiderationsMinimizing the following type of noise transmission is criticalto a successful installation. ASHRAE Systems is an excellentreference for sound attenuation and acoustical design.

VibrationCompressor and fan vibration must be isolated from thebuilding.

Radiated NoiseEffort should be made to locate the equipment betweenunoccupied areas. Concrete block walls are recommended.If this is not possible, then a double stud offset wall isrecommended. Bulletin 6085-3 gives further details.Construction details are also important and sealing allpenetrations of the equipment room wall is critical.Self-closing, gasketed doors should be utilized and allopenings around piping and conduit should be caulked.Improper fit between walls can also cause “noise leaks” fromcorners.

Supply DuctSupply duct breakout may be the most important acousticalconsideration.— Supply duct should be routed out of the equipment room

over non-sensitive areas.— Supply duct must be acoustically lined. Bulletin 6085-3

illustrates successful methods.— The fan discharge arrangement must be properly matched

to the duct. The horizontal discharge offered by DB allowsminimum turbulence and air pressure drop.

— A vertical discharge into a plenum, as illustrated in Bulletin6085-3, is recommended when multiple take-offs originateabove the PVW.

— Minimizing duct aspect ratio reduces “oil canning” due toturbulence.

— Static pressure, duct velocity, and bhp must be minimized.

Return AirReturn air treatment is also required to prevent radiated noisefrom leaving the equipment room. Bulletin 6085-3 illustratessuccessful methods. It is critical that a barrier or duct beapplied, including sound attenuating insulation, if the returnopens to the ceiling plenum near occupied areas.

Condenser Water TemperatureHead pressure control must be provided if the economizeroption is not used. Fan cycling and/or modulating dischargedampers on the cooling tower are often used; however,superior control is obtained by utilizing head pressure controlvalves on each VAV unit. Control valves should be providedto maintain a constant LWT from the condenser at 80°F.Insulated piping must be considered if water temperaturecan drop below room dew point such as when using waterside economizers.

Field Plumbing Design Application Considerations— Counter-flow piping is required for proper operation and

labeling instructions for supply and return connectionsmust be followed.

— Piping should be designed to allow isolating and drainingthe unit for service.

— The drain connection from the unit must be trapped sincethe inside cabinet experiences negative pressure.

— Unions, thermometers and gauges should be provided onsupply and return water lines.

— To eliminate potential unit damage from dirty water, waterstrainers are required at the unit inlet. Specify a waterbasket-type strainer to avoid an incorrect stream strainerapplication. Untreated or poorly treated water may resultin equipment damage.

— Install isolation valves at each unit before the strainer andafter the condenser for periodic servicing of the unit orstrainer.

— Install thermometers on the condenser water inlet andoutlet lines to each unit for system analysis. It isrecommended to use a thermometer temperature rangeof 40 to 140°F, using a 2°F temperature increment.

— Install pressure gauges on the inlet and outlet of the self-contained unit. Select the gauge’s scale so that the unitdesign operating point is approximately mid-scale.

36

APPLICATION INFORMATION (CONT.) ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Main Power Supply Disconnect SwitchDisconnecting means are addressed by Article 440 of theNational Electrical Code (NEC). An optional, factory mounted,non-fused disconnect is offered with the PVW. Locationrequirements per NEC are that the disconnect be located in areadily accessible position within sight (50 feet) of the unit.

Interlock Wiring— The condenser water pump should be interlocked to cycle

with the fan motor using the condenser interlock contactsshown on the wiring diagram.

— An optional air flow switch is offered for field installationto prevent compressor operation if air flow is lost.

— Optional water flow switches are also recommended.— Unit enable contacts may be connected with shielded cable

to the terminals shown on the wiring diagram.

Handling & RiggingEach unit is equipped with a heavy shipping skid to facilitatehandling and help prevent damage. This skid allowsattachment of rigging cables. Spreader bars and suitablepadding must be used to avoid damage during all hoistingoperations. It is essential that the unit be kept upright duringall handling operation.

Operating LimitsOperating limits are defined by the limits in the capacitysections.

Airflow: The minimum recommended airflow for proper VAVsystem staging and temperature control is 35 percent ofnominal design airflow. Adjusting VAV boxes with theappropriate minimum settings will prevent the self-containedunit from operating in a surge condition at airflows belowthis point. Continuous operation in a surge condition cancause fan failure.

These units use fixed pitch sheaves. Adjust air balancing byobtaining alternate fixed pitch sheave selections if required.

Waterflow: Use 3 gpm/ton for optimum unit capacity andefficiency. Use 2.5 or 2 gpm/ton to reduce pump energy,cooling tower and piping costs. However, these reducedwaterflows may impact unit capacity and efficiency by oneor two percent.

Service AccessClearance requirements are defined in the figure on page35.

37

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40

TYPICAL WIRING DIAGRAMS

3TB WHT

WHT

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ALARM

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1061CR-2

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CONTACTS*SMOKE DETECTOR

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157

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6

5

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POWER BOX

CONTROLS BOX

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14

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NOCOM R07

Y

Y

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W

W

W

NO

NO

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R04

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3LT

2M

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3MOL

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2

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S3

31

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2

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50

49

48

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1L31L1 1L2

1

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4L1

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Y

47

46

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24V

30

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1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

1 HTR

TOPOWERSUPPLY

L1

L2L3

1TB

COMPRESSOR MOTORS1T

6

2

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SEE NOTES2, 3, & 4

S1

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○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

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Models 15 & 30

ELECTRICAL DATA

Figure 30 Model PVW/PCWEvaporator Fan Motor

Figure 31Compressors

Fan VoltageMotor 208V 230V 460V 575V

HP KW FLA FLA FLA FLA5 4.7 16.7 15.2 7.6 6.1

7 1/2 6.9 24.2 22.0 11.0 9.010 8.5 30.8 28.0 14.0 11.015 13.4 46.2 42.0 21.0 17.020 17.1 59.4 54.0 27.0 22.025 20.7 74.8 68.0 34.0 27.0

Unit Fan Min. Circuit Ampacity Max. Time Delay FuseSize HP 208V 230V 460V 575V 208V 230V 460V 575V

5 73 71 37 28 90 90 45 35

15 7 1/2 81 78 41 31 100 100 50 3510 89 85 44 33 110 110 50 4015 108 103 53 41 150 125 70 505 87 85 44 33 110 110 50 40

7 1/2 94 92 47 36 110 110 60 4520 10 101 98 50 38 125 125 60 45

15 120 115 58 46 150 150 70 6020 137 130 66 52 175 175 90 705 95 93 46 38 125 125 60 50

7 1/2 103 100 50 41 125 125 60 5025 10 109 106 53 43 125 125 60 50

15 128 122 61 50 150 150 80 6020 144 137 68 56 200 175 90 705 112 110 58 46 150 150 70 60

7 1/2 119 117 62 49 150 150 80 60

30 10 126 123 65 51 150 150 80 6015 143 137 72 57 175 175 90 7020 159 152 79 63 200 200 100 8025 178 170 88 70 250 225 110 90

7 1/2 135 133 66 58 175 175 80 7010 142 139 69 60 175 175 90 80

35 15 157 153 76 66 200 200 90 8020 173 166 83 71 225 200 100 9025 193 184 92 77 250 250 125 100

7 1/2 135 133 66 58 175 175 80 7010 142 139 69 60 175 175 90 80

39 15 157 153 76 66 200 200 90 8020 173 166 83 71 225 200 100 9025 193 184 92 77 250 250 125 100

RLA — Rated Load Amps LRA — Locked Rotor Amps FLA — Full Load Amps**At 85°-95° water, 400 cfm per ton, 80/67 EAT; High Side Pressure = 400; Low Side Pressure = 250 At 95° Ambient (125° condensing) for air-cooled option

Figure 32

Model COMP #1 & 2 COMP #1 & 2 COMP #1 & 2PVW/ ** 208/230V 460V 575VPCW KW RLA LRA RLA LRA RLA LRA15 10.8 23.7 189 12.5 94 9.1 7420 13.2 29.9 232 15.3 125 11.5 10025 16.3 33.6 278 16.5 127 13.7 10030 20.9 41.0 350 21.8 158 17.3 12535 26.2 48.1 425 23.7 187 21.2 14839 26.3 48.1 425 23.7 187 21.2 148

Note: Smaller fuses can often be used (consult factory)

WIRING (Installer is to provide wiring to the unit)Main Power — Three phase power wiring, using only copperconductors, must be installed in accordance with the National ElectricCode and all applicable local codes. A field-supplied main powerdisconnect switch must be supplied for each unit within sight of theunit and is offered as a factory installed option. Refer to the table forvoltage tolerances, required circuit ampacity and recommended wireand fuse sizes. Consideration must be given to installing oversizedpower wiring in the event of exceptionally long wire runs, sensors,fan switches, etc.

60 HZ. VOLTAGE TOLERANCESVOLTS MIN./MAX. 208 187 — 228 230 207 — 253 460 414 — 506575 518 — 632

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

ENGINEERING GUIDE SPECIFICATIONS

101 Burgess Road, Harrisonburg, VA 22801Phone: 540-434-0711 Fax: 540-434-4595

www.dunham-bush.comSeptember 2000 Form No. 7085

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

GeneralUnit shall be a Dunham-Bush PVW, packaged air conditioner, factorytested and charged. Units are to be ETL approved and be so labeled.

FanFan shall be twin DWDI, centrifugal, (forward curved) with (highefficiency) open drip-proof motor and sheaves selected for 120%service factor. Fans are to be dynamically and statically balanced. Asolid fan shaft and 200,000 hour average life bearings (withlubricating lines) shall be provided. The fan motor and blowerassembly shall be mounted on a pivoting base to allow adjustmentfor belt tension.

The supply fan motor shall have a service factor of 1.15. The supplyfan motor shall be either:

• Standard efficiency open drip-proof• Premium efficiency open drip-proof• Totally enclosed fan-cooled standard efficiency.

Supply fan motors shall have a standard T-frame. All drive componentsshall be accessible without using ladders.

The entire fan assembly, including drive components, shall bemounted on a common frame. The fan frame assembly shall beisolated inside the unit. The entire assembly shall be statically anddynamically balanced at the factory.

CabinetBase shall be 8 gauge galvanized steel with 18 gauge gasketed accesspanels. Base and cabinet shall be primed and finished with bakedenamel paint. Unit shall be insulated with 1", 3 pound density, facedinsulation. Access panels are to be removable using quick releasefasteners and gasketing shall be provided between the access panelsand frame to minimize air leakage.

ControlsSingle point power (terminal block) (fused disconnect) (non-fuseddisconnect) shall be provided along with compressor contactors (andovercurrent protection) fan starter and control transformer andfusing.

A 115 volt control circuit shall be used for unit control circuit. Allfield wiring connections are to be 5 VDC or 12 VDC. Safety controlsshall include high pressure, low pressure and solid state compressoroverload protection.

CompressorsCompressors shall be provided as follows:

Two independent compressors and refrigerant circuits shall beprovided with scroll compressors complete with crankcase heatersand thermal protection in each motor winding.

Scroll compressors shall be heavy-duty suction-cooled type withsuction screen, centrifugal oil pump with dirt separator, oil chargingvalve, and oil sight glass. Protective devices for low pressure, highpressure, and motor temperature shall be provided. The compressorsshall be mounted on isolators for vibration isolation.

EvaporatorThe evaporator coil shall be seamless copper tubes expanded intoaluminum fins. Tubes shall be 1/2 inch (13mm) OD. Coil shall havestaggered tube arrangement with intertwined circuiting and no morethan 14 fins per inch. Include factory mounted distributor, side porthot gas bypass connector, and thermal expansion valve. A galvanized(mastic coated) (stainless steel) drain pan shall be provided.

CondenserCondenser shall be constructed of copper tubes and steel shells. Theyshall be ASME stamped or UL or ETL listed, mechanically cleanable,with removable heads, pressure relief valve and (250) (300) psi waterside working pressure capabilities. Tubes shall be 3/4 inch (19mm)OD and constructed of heavy wall copper. Non-cleanable condensersare not acceptable.

Refrigerant PipingRefrigerant circuits shall be independent and completely piped

including filter driers, sight glasses, distributors, thermal expansionvalves with adjustable superheat and external equalizer, and highpressure relief valves. The circuits shall be factory dehydrated, chargedwith oil and refrigerant 22. Compressors shall be mounted on rubber-in-shear isolators for vibration isolation.

Refrigerant Circuits for PVR/PCR only:Two refrigerant circuits shall be piped to the unit’s exterior. Therefrigerant piping includes filter driers, sight glasses, distributors,thermal expansion valves with adjustable superheat and externalequalizer. Compressors shall be mounted on rubber-in-shear isolatorsfor vibration isolation. High pressure safeties are included with air-cooled option.

Optional VAVUnit to include factory installed inlet vanes, actuators, linkage andstatic pressure control. No field labor shall be required exceptinstalling sensing tubing in supply ductwork. Fans shall start in the‘closed vane’ position. Fan noise and total static pressure mustdecrease at part load. VAV dampers, and other “ride the fan curve”VAV methods, are not acceptable. Stroke can vary from 130-300seconds.

Unit ControlsMicroprocessor controls shall be provided to control all unit functions.The control system shall be suitable to control CV or VAV applications.The controls shall be factory-installed and mounted in the maincontrol panel. All factory-installed controls shall be fully commissioned(run tested) at the factory. The unit shall have a human interfacepanel with keypad, a clear language display as standard to providethe operator with full adjustment and display of control datafunctions. The unit controls shall be used as a stand-alone controlleror as part of a building management system involving multiple units.

The unit shall be equipped with a complete microprocessor controlsystem. This system shall consist of temperature and pressure(thermistor and static pressure transducer) sensors, printed circuitboards (modules) and a unit mounted human interface panel.Modules (boards) shall be individually replaceable for service ease.All microprocessors, boards, and sensors shall be factory mounted,wired, and tested.

Optional Supply Air Temperature Control withVariable Frequency DriveThis option controls the VAV self-contained unit from the dischargeair temperature using a factory or remote mounted variable frequencydrive (VFD). The VFD safely varies the fan motor speed to allow theunit to meet the system static. Control components include adischarge air microprocessor controller and discharge air sensor.Includes factory or field installed variable frequency drive (VFD) toprovide supply fan motor speed modulation. The VFD receives 0-10vdc signal from the unit microprocessor based upon supply staticpressure and causes the drive to accelerate or decelerate as requiredto maintain the supply static pressure setpoint.

Variable frequency drive with manual bypass control provides fullnominal airflow and zone temperature control in the event of a drivefailure. The VFD with bypass is factory or field mounted. Motorprotection is provided during both drive and bypass modes.

Optional Water Side EconomizerUnit shall include factory mounted (cleanable) free cooling coil, three-way valve and operator, all factory piped to the condenser so only asingle supply water connect is required. Economizer shall be ratedfor (150) (300) psi working pressure. All dissimilar metal shall beseparated by di-electric fitting.

Optional Air Side EconomizerA mixing box (with low leak dampers) shall be provided for fieldinstallation (complete with linkage and actuator).

FiltersFilters to be 2" (disposable) (cleanable) (35% pleated) as scheduled.The filter section is shipped separately from the main unit.

Documents

09/00 7085 PVW/PCW PVR/PCR Packaged Air …6 STANDARD FEATURES (CONT.) Single Fan Size 15 Twin Fan Size 20-39 Full Perimeter Gasketing Internally Isolated Fan/Motor Assembly Upper