tm computer room air-conditioning—60 hz · when hot spots exist in close proximity to the air...

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TM

Computer Room Air-Conditioning—60 Hz

Technical Data

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Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Scalable Solution for Critical Environments . . . . . . . . . . . . . . . . . . . 2

Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Microprocessor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Upflow models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Downflow models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Performance Specifications—Air Cooled. . . . . . . . . . . . . . . . . . . . . 12

Performance Specifications—Water Cooled . . . . . . . . . . . . . . . . . . 15

Performance Specifications—Glycol Cooled. . . . . . . . . . . . . . . . . . 17

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Air-Cooled Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Fluid Coolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Pump Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Guidelines for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

APC NetworkAir FM DX Technical Data Manual i

Overview

The modular, Floor Mount com-puter room air-conditioning system offers efficient, effective and eco-nomical cooling for a variety of spaces.Computer room environmental requirements now reach far beyond the confines of the traditional data center or computer room to encom-pass a larger suite of applications, referred to as technology rooms. Critical environment applications include:

• Computer rooms• Telecommunication facilities• Clean rooms• Power equipment• Medical equipment rooms• Archives• LAN/WAN environments

A worldwide network of APC rep-resentatives is fully qualified to provide engineering, sales, installa-tion and service for our products. APC warrants all parts for 12 months from shipment. Extended warranties are available.

Room Air DistributionDownflow systems discharge air into the raised floor plenum. These systems are suitable for areas with raised floors no less than 457 mm (18 in) high. Return air is drawn in through the top of the system. Downflow systems also include a static regain plenum for each blower. This evens out velocity pro-file and increases static performance while reducing the noise level. It also allows access to some components while the system is operating, without interrupting airflow.

Upflow systems discharge air into either a plenum or ductwork. These systems can be used when a raised floor does not exist or is not suit-able for cooling. Air is drawn in through the front and optionally from the rear of the system.The NetworkAIR FM delivers high volumes of airflow, 160 CFM/kW (550 CFM/ton) to eliminate hot spots in densely populated environments.

Configuration• Glycol Cooled• Glycol Cooled with Economizer • Water Cooled• Air Cooled• Air Cooled with MultiCool

(Chilled Water Coil)

Compliance Approval• UL Listed to UL 1995 and CSA

C22.2 No. 236• MEA (City of New York)• CE certified

Standard Features• Water Regulating Valves (3-way

only) - (Water/Glycol)• Brazed Plate Condenser (Water/

Glycol)• Tandem Scroll Compressors• Configurable Dehumidification• Direct Drive Motor/Blower• Frequency Controlled Motor• Electrical Panel• Double Skin Panels• Microprocessor Controller• Programmable Input/Output

Interface Module• Main Power Circuit Breaker(s)• Anti-fungal Condensate Pan• Refrigerant Charge Isolation• Predictive Failure Warnings• Evaporator Freeze Protection• High Return Air Temp Capability• Network Management Card• Redundant Group Control• Refrigeration System Monitoring• Replaceable Steam Humidifier• SCR Controlled Electric Reheat• 30% ASHRAE 52.1 Filters• High Lift, Dual Float Condensate

Pump

Optional Features• Plenums (with or without grilles)• Floorstand• Discharge Duct Collar• Sub-Base• Firestat • Smoke Detector• Water Flowswitch (Water, Glycol,

Economizer, or MultiCool)• Spot/Cable Water Detector(s)

APC NetworkAir FM DX Technical Data Manual 1

Scalable Solution for Critical Environments

Temperature and Humidity Design ConditionsMaintenance of temperature and humidity design conditions is criti-cal to the smooth operation of a technology room. Design condi-tions, measured at the FM return air, should be 22.2-24.8° C (72-75° F) and 45-50% relative humidity (R.H.). As damaging as the wrong maintained conditions can be, rapid temperature swings can also have a negative effect on hardware operation. This is one of the reasons hardware is left pow-ered up, even when not processing data. Computer room air condition-ing is designed to maintain temperature at ±1°F and humidity at ±3-5% R.H. 24 hours a day, 8760 hours a year. Vapor barriers and sealed rooms are required to main-tain these tolerances.In contrast, comfort systems are designed to maintain ±5°F from the temperature setpoint. There is usu-ally no dedicated humidity control and the simple controllers cannot maintain the set point tolerance required for temperature, allowing potentially harmful temperature and humidity swings to occur. This is not acceptable for sensitive elec-tronic equipment.

Air QualityComputer room air conditioners provide a high air volume, 160 CFM/kW (550 CFM/ton). This high CFM moves more air through the space improving air distribution and reducing the chance of local-ized hot spots. It also allows more air to move through filters, ensuring a cleaner environment. This requires a moderate- to high-effi-ciency filter bank to minimize airborne particles.

Problems Caused by the Wrong EnvironmentA poorly maintained technology room environment will have a nega-tive impact on computer room operations. The results can range from data corruption to complete system shutdowns and failures.

High & Low TemperatureA high or low temperature swing or rapid temperature swings can cor-rupt data processing and shut down an entire system. Temperature vari-ations can alter the electrical and physical characteristics of elec-tronic chips and other board components, causing faulty opera-tion or failure. These problems may be transient or may last for days. Transient problems can be very dif-ficult to diagnose and repair.

High HumidityHigh humidity can result in tape and surface deterioration, head crashes, condensation, corrosion, paper handling problems and (gold and silver) migration leading to component and board failure.

Low HumidityLow humidity greatly increases the possibility of static electric dis-charges. Such static discharges can corrupt data and damage hardware.

APC NetworkAIR™ FM-The Right SolutionThe APC NetworkAIR™ FM pro-vides the maximum amount of computer room cooling in a com-pact footprint. Highly scalable, the system is capable of growing with your cooling needs as they increase. Each system comes standard with concise capacity controls for high efficiency operation.

Compact FootprintThe NetworkAIR FM delivers a high capacity of cooling in a small “overall” footprint. Since the sys-tem requires only front service access, units can be placed side by side and valuable floor space is not wasted.

Capacity ControlThe NetworkAIR FM utilizes tan-dem scroll compressors for two step modulation. One or both of the compressors can run depending on the load of the system. This allows up to two steps of “true” unloading without the power factor and fric-tion penalty of an unloaded semi-hermetic compressor.

Efficiency and ReliabilityThe high EER (up to 20.0) and few moving parts of scroll compressors provide efficient and reliable opera-tion. Scroll technology has unparalleled ability to withstand liquid refrigerant ‘slugging’ which is a major cause of compressor fail-ure. It is designed as a single assembly with one suction line and one discharge line per set.

APC NetworkAir FM DX Technical Data Manual2


Dedicated Dehumidification CycleA dedicated dehumidification cycle allows the system to increase latent capacity without overcooling, lowering the requirement for reheat and humidification. This is accomplished by operating one compressor, isolating a portion of the coil from the refrigerant flow and lowering the evaporator temperature when dehumidification is required. Two compressor operation during dehumidification mode may be enabled through the microprocessor for humid environ-ments where more latent capacity is required.

Demand FightingIn rooms with multiple units, return temperature and humidity may vary a small percentage. This variance may result in units operating in conflicting modes. For example, one unit may be dehumidifying while another, within close proximity, is humidifying. This results in demand fighting and lower overall efficiency.

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Cooling Coils

Distributor

Expansion Valve

Distributor

Flow Regulator

NORMAL COOLING MODE DEHUMIDIFICATION MODE

Solenoid Closed

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Humidity ControlIncreasing heat densities in data centers are leading to more hot spots and higher return temperatures to the precision air conditioners. When hot spots exist in close proximity to the air conditioner, temperature and humidity readings can be misleading to the overall room conditions. As temperature increases, the R.H. level (the amount of moisture the air can hold at a given temperature, shown as a percentage) decreases. If the air conditioner is set to control on R.H., it will over humidify based on the higher return air temperature and lower R.H.. There are two methods of pre-venting this over-humidification. The most accurate way to achieve this is by changing the humidity set point on the controller to dew point control. You can see from the horizontal line in the psychrometric chart that the dew point does not change as the dry bulb temperature increases from 23.8° C (75° F) to 29.4° C (85° F). However, humidifying the room to maintain 45% R.H. would result in excess moisture content in the room. Another way to prevent over-humidification from hot spot fluctuations is through temperature and humidity averaging. This ensures that an outly-ing condition does not affect the overall room conditions. Individual hot spots should be addressed using heat removal architectures to address the problem at the rack level. See APC White Paper #55 for more information on air distribution architechtures.

4 APC NetworkAir FM DX Technical Data Manual


Glycol-Cooled ConfigurationGlycol-cooled systems are completely charged and factory tested in a sealed system for reliabil-ity. In mid to low ambient climates, an economizer coil can be used to increase effi-ciency and extend compressor life. Economizer operation greatly reduces the energy consump-tion of the system. Water regulating valves control head pressure.

• System is used with a fluid cooler.• Factory tested as a sealed system.• Eliminates the need for field refrigerant piping.• No requirement for water treatment.• Economizer option for high efficiency.• Low maintenance.

Water-Cooled ConfigurationWater-cooled systems are completely charged and factory tested as a sealed system for reliabil-ity. Cooling towers are used as a source of heat rejection and can be used to serve multiple indoor units. Towers utilizing outdoor air require water treatment.

• System used with a cooling tower or other source of water.

• Factory sealed and tested system.• Eliminates the need for field refrigerant piping

Air-Cooled ConfigurationAir-cooled systems are not pre-charged from the factory, requiring field refrigerant piping. Each installation requires an engineered piping solu-tion. APC strongly recommends installation by a highly qualified refrigeration contractor, to avoid improper elevation and long piping runs.

• System used with a remote air cooled condenser• Requires field refrigerant piping• Low maintenance

i

FLUID COOLER

EXPANSION TANK

COMPRESSOR

EXPANSIONVALVE

EVAPORATOR

CONDENSERPUMP

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FLUID COOLER

EXPANSION TANK

ECON COIL(OPTIONAL)

COMPRESSOR

EXPANSIONVALVE

EVAPORATOR

CONDENSERPUMP

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EVAPORATOR

WATER TOWER

CONDENSER

EXPANSION

COMPRESSOR

PUMP

VALVE

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MULTICOOL COIL(OPTIONAL)

EXPANSIONVALVE

COMPRESSOR

CONDENSER

RECEIVER

EVAPORATOR


Standard Features

Double Skin PanelsThe frame is bolt together 12 gauge formed steel for maximum strength. Cabinet is serviceable from the front. All exterior panels and corner posts on the frame are powder coated for durability and an attrac-tive finish. Front exterior panel crowne is 16 gauge. All other pan-els are double skin, 24 gauge exterior, 24 gauge interior with 0.68 kg (1-1/2 lb) per cubic foot insulated for quiet operation. Insu-lation is CFC-free and recyclable. Double skin panels isolate insula-tion from the air stream and further reduce sound levels. Left and right front panels are hinged and remov-able for easy access. Middle panel is removable.

Direct Drive Motor/Blower AssemblyEach cabinet includes precision bal-anced centrifugal blower assemblies that have a G 6.3 (ANSI S 2.19) balance quality grade. The blowers are mounted based on mass and frequency to eliminate vibration and noise. A direct drive motor and frequency controller are used with each blower in the system to enhance user functionality. Each unit is equipped with two blower assemblies.

Frequency Controlled MotorA frequency controlled drive is installed for each direct drive blower motor. The frequency con-troller communicates with the microprocessor controller allowing user adjustable rpm settings via the main display. This makes field air balancing quick and easy. Field air balancing is a common after thought that can be expensive and lead to back-charges. Each time the fans are started, the frequency con-trolled drives control the ramp-up of fan speed. This thirty second soft start lowers the in-rush current and reduces the locked rotor amps used when sizing generators.

Tandem Scroll CompressorsThe refrigeration system operates under a master controller for greater efficiency and accuracy. Suction and discharge pressures are moni-tored and electronically controlled. Tandem scroll compressors are designed for year-round operation with a 15-year life expectancy. The microprocessor controller provides real-time suction and discharge pressure readings reported by trans-ducers installed on the refrigeration system.

Electrical PanelThe electrical panel contains the contactors, starters, overload pro-tection devices, and input power disconnects.

Evaporator Coil/UL94 5V Ther-mal Condensate PanThe evaporator coil is 1/2 in rifled, copper tube, with raised lance alu-minum fins. The condensate pan is UL94 5V thermal formed, anti-fun-gal, non-ferrous material for higher indoor air quality. The evaporator is configured as a V coil.

Programmable Input/Output Interface ModuleThe main module provides field connections through a system pro-grammable input/output module. Up to three additional input/output interfaces may be added to the main module. Each interface module is programmable with inputs that can be mapped to any system alarm or annunciated to outputs as a system alarm or custom (12-character) alarm.

Main Power Circuit Breaker(s)A nonautomatic main power circuit breaker disconnects all high voltage power to the unit if necessary. The disconnect switch is accessible without removing the electric box cover.

Redundant Group ControlAllows up to 4 FM units to commu-nicate with each other for redundancy, demand fighting pre-vention, load and global sharing of certain settings. Requires standard network cable interconnection.

Network Management CardPermits multi-level access to moni-toring, control, and event notification features over the user’s network.

Evaporator Freeze ProtectionSuction pressure is actively moni-tored and controlled to eliminate risk of condensate freeze-up on the evaporator.

Predictive Failure WarningsSeveral components, such as the compressor, variable frequency driver, blower, heater and humidi-fier, within the unit will provide a warning that service is needed prior to failure occurring.

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Standard Features

Steam Generating HumidifierThe humidifier utilizes a pure steam generator specifically designed for precision environmental control. The pure steam eliminates contami-nating mineral deposits, potentially harmful bacteria, white dust and excessive humidity. The humidifier requires little scheduled mainte-nance. Automatic flushing combined with a communication link to the controller signals when the canister is to be changed. Humidifier is proportionally con-trolled to meet the humidification demands of the conditioned space. The communication link to the main controller provides diagnostic capability for the humidifier.

Refrigerant Charge IsolationFor compressor protection, the Net-workAIR FM utilizes charge isolation and crank case heaters during compressor off-cycles. This eliminates the threat of liquid refrigerant migration that could lead to compressor slugging and lubrica-tion issues.

Refrigeration System MonitoringThe system reports real time moni-toring of both suction and discharge pressures to the controller.

High Lift, Dual Float Conden-sate PumpThe factory installed and wired con-densate pump is capable of pumping 0.32 l/s (5.1 GPM) at 13.4 m (44 ft) head.

Brazed Plate CondenserWater- and Glycol-cooled systems employ a brazed plate heat exchanger. The condenser is equipped with clean out plugs. Rotalock valves make removal of the brazed plate condenser easy for maintenance and replacement.

Water Regulating ValvesWater and glycol cooled systems utilize three-way valves to regulate the amount of water or glycol sup-plied to the condenser in response to refrigerant discharge pressure. The standard valve pressure rating is 2758 kPa (400 psi).

30% ASHRAE 52.1 FiltersThe filtration of conditioned air is extremely vital to maintaining the clean, particle-free environment required by electrical equipment. The system uses 30% efficient (100 microns) (ASHRAE 52.1-92), 102 mm (4 in) deep filters, with full depth filter pleats. Deeper filters produce a lower pressure drop, requiring less energy during normal operation. Filters are replaceable through the front of the upflow unit, and through the top of the down-flow unit.

SCR Controlled Electric ReheatElectric reheat elements are low watt density, wired for 3-phase and loaded equally on all three phases, SCR controlled, and electrically and thermally protected by both automatic and manual reset thermal cut outs. Reheat coils are stainless steel, fin tubular construction.


Optional Features

Cable Water DetectorA leak detection cable is placed on the floor or subfloor around all pos-sible leak sources. If water or other conductive liquids contact the cable anywhere along its length, the mas-ter controller visually and audibly announces a leak. The detector shall be provided with 6.1 m (20ft) of cable, and may be cascaded to make a custom maximum length of up to 30.5 m (100 ft). Four water detector connection points are provided with the unit.

Spot Water Detector(s)The solid-state spot water detector activates an audible alarm on the controller when moisture is detected. A maximum of four water detector connection points are pro-vided with the unit.

FirestatA firestat is available for field installation in the air stream of the unit. If the return air temperature reaches the custom adjustable set temperature, an audible and visual alarm on the microprocessor will be activated and the unit will immedi-ately shutdown.

Smoke DetectorThe smoke detector is designed to sense smoke in the return air stream. Upon detection of smoke, an audible and visual alarm on the microprocessor will be activated and the unit will be immediately shutdown. (Ships loose for field installation.)

MultiCoolThe MultiCool systems contain a chilled water coil and direct expan-sion coil within the same cabinet. Either cooling coil can be used as a backup to the other. These systems provide cooling using either build-

ing chilled water or the direct expansion system.

EconomizerGlycol and water cooled systems may be optionally configured with an economizer coil. During cold ambient conditions, the compres-sorized system will shut-down and utilize the cold outdoor air to cool the water/glycol system, rerouting it from the brazed plate heat exchanger to the economizer coil for efficient operation. One step compressor operation may be uti-lized to assist in economizer mode.

FlowswitchSingle pole, double throw flowswitch detects when fluid flow drops below the set flow rate. Ships loose for field installation.

Network CableVarious lengths of network cable are available to ship with your cool-ing system. Network cable is used to interconnect multiple cooling units in a redundant group, as well as to connect the network manage-ment card to your LAN.

FloorstandThe floorstand raises the unit above the subfloor to match the height of the raised floor. Floorstands are equipped with air deflectors for optimal air distribution. Heights are available from 305 mm (12 in) to 610 mm (24 in) on FM upflow units and from 457 mm (18 in) to 610 mm (24 in) on FM downflow units, in 76.2 mm (3 in) increments and are adjustable +/- 38.1 mm (1.5 in). Adjustment is provided by threaded pedestals. Vibration absorbing pads are included. The floorstand, pedestal, and pads ship loose.

Discharge Duct Collar

A 25.4 mm (1 in) duct flange is shipped loose from the factory for field installation to provide connec-tion to external ductwork for either supply or return as needed.

Sub-BaseThe Sub-Base raises the height of the unit by 254 mm (10 in) on upflow units to provide access for electrical and piping connections. Front and rear access panels on the sub-base are removable.

PlenumsDischarge plenums are available on upflow and downflow systems. On upflow configurations, heights are offered in 508mm (20in) and 610 mm (24 in) with front, 2-sided, or 3-sided grilles. On downflow configurations, the available height is 457 mm (18 in) and discharges air horizontally from the front of the plenum. This application is recom-mended in rooms where racks are positioned in hot aisle/cold aisle configurations. Discharge air should be ducted down cold aisles.

Additional Programmable Input/Output Interface ModulesEach FM unit comes equipped with one discrete input/output module, each allowing a total of four inputs/outputs. An optional three discrete input/output modules can be added for a total of 16 inputs/outputs. Each interface module is program-mable with outputs that can map from any system alarm through the microprocessor controller. Inputs are capable of mapping to outputs as a system alarm or custom alarm.


Microprocessor Controller

Microprocessor Controller

Microprocessor Controller The microprocessor controller is standard on each system. The con-troller provides precision control for the demanding requirements of:

• Data centers• Control rooms• Clean rooms• Switch rooms• UPS rooms

The easy-to-use display allows the operator to select options from the device’s menu-driven interface to control and monitor the connected air conditioning system.

Open ArchitectureThe NetworkAIR FM protocol is open for integration with all build-ing management systems. Communication interface on the system can be MODBUS RTU RS485.

Control TypeController utilizes proportional plus integral plus Derivative (PID), a time proven precision environmen-tal control method. This allows for custom tuning of control variables to achieve desired system response.

Functions• Status Report• System Control• Event Logging• Redundant Unit Group• Static Pressure Adjustment

LoggingThe microprocessor displays the 64 most recent alarms. Each alarm log contains a time/date stamp as well as operating conditions at the time of occurrence. The controller also displays run time, in hours, for major components (compressors, heaters, humidifier, blower motors).

ControlThe backlit, four-line x twenty-character display is password configured.

• Temperature Setpoint 15-32° C (60-90° F)

• Humidity Setpoint 30-80% R.H.• Blower Motor Setpoint 20-60Hz.

(Factory preset for model size and options.)

• High Temperature Alarm 2-32° C (35-90° F)

• Low Temperature Alarm 2-32° C (35-90° F)

• High Humidity Alarm 15-85% RH• Low Humidity Alarm 15-85% RH

Alarms• High/Low control temperature• High/Low control humidity• Clogged filter• Return sensor failure• High/Low supply temperature• Loss or low airflow• Loss of water flow (unit specific)• Supply sensor failure• Water regulator actuator failure

(unit specific)• Econ/MultiCool Actuator failure

(unit specific)• High head pressure• Low suction pressure• Humidifier failure (unit specific)• Replace humidifier canister (unit

specific)• Frequency controller failure• Air block interlock open• Water detected (optional)• Fire (thermal sensor trip- optional)• Smoke detected (optional)• Condensate pump failure

Alarm LED

Warning LED

Check Log LED

System On LED

Liquid Crystal Display (LCD)

Menu Selection scroll keys

ESC key

Enter key

Help key

ESC

?

Status

CheckLog

MinorAlarm

MajorAlarm na

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Upflow models

Upflow models

FM Upflow Components

Motor and fan assembly Electrical junction box

Steam head User interface box

DX coil Firestat (optional)

Economizer coil* Air filters

Condensate pan Fan interlock switch

Liquid refrigerant receiver Main power interrupt switch

3-way ball valve Display interface

Condensate pump Electrical panel

Tandem compressors Duct flange (optional)

Humidifier Electric reheat coil*Available on specific models

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Downflow models

FM Downflow Components

Air filters Tandem compressors

Fan interlock switch Humidifier

Multicool or economizer coil (optional)

Condensate pump

DX coil User interface box

Condensate pan Firestat (optional)

Motor and fan assembly Electrical panel

3-way ball valve Steam head (not shown)

Liquid refrigerant receiver Main power interrupt switch

Brazed plate condenser (water and glycol models)

Display interface

Liquid line filter/dryer Electric reheat coil

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Performance Specifications—Air CooledNET COOLING MODE CAPACITY - BTU/HR (kW)*

80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) Total 175,452 (51.4)Sensible 139,270 (40.8)

75°F DB, 62.5°F WB (23.9°C DB, 16.9°C WB) Total 159,649 (46.8)Sensible 137,185 (40.2)

75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) Total 156,904 (46.0)Sensible** 149,421 (43.8)

72°F DB, 60°F WB (22.2°C DB, 15.5°C WB) Total 152,204 (44.6)Sensible 134,826 (39.5)




NET DEHUMIDIFICATION MODE CAPACITY - BTU/HR (kW)72°F DB, 62.7°F WB (22.2°C DB, 17.1°C WB) 60% RH

Total - 1 Compressor 80,977 (23.7)Sensible - 1 Compressor 61,536 (18.0)Total - 2 Compressors 142,270 (41.7)Sensible - 2 Compressors 87,905 (25.7)

72°F DB, 61.4°F WB (22.2°C DB, 16.3°C WB) 55% RHTotal - 1 Compressor 79,362 (23.2)Sensible - 1 Compressor 71,724 (21.0)Total - 2 Compressors 138,074 (40.4)Sensible - 2 Compressors 97,031 (28.4)


TOTAL HEAT REJECTION (80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 251,450 BTU (74 kW)MULTICOOL -- NET COOLING CAPACITY DATA -- BTU/HR (kW) - 45°F (7.2°C) EWT* - DX MODE

80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 50% RHTotal 157,543 (46.2)Sensible 129,869 (38.1)

75°F DB, 62.5°F WB (23.9°C DB, 16.9°C WB) 50% RHTotal 143,536 (42.1)Sensible 127,212 (37.3)


72°F DB, 60°F WB (22.2°C DB, 15.5°C WB) 50% RHTotal 136,131 (39.9)Sensible** 123,442 (36.2)




NOTE: Performance of 208 V operation is slightly diminished.*Rated Capacity +/-10%**Nominal Rating Point***With equal loading on each phase, rated at 208-230V / 3-phase, 480V / 3-phase****Add 150lbs (68kg) when MultiCool option is selected


MULTICOOL -- NET COOLING CAPACITY DATA -- BTU/HR (kW) - 45°F (7.2°C) EWT* - CW MODE80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 50% RH

Total 195,654 (57.3)Sensible 149,707 (43.9)







MULTICOOL REQUIREMENTS - CHILLED WATER, 45°F (7.2°C) EWTWater In -- GPM (L/s) 80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 44.2 (2.8)Pressure Drop -- PSI (kPa) 80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 16.5 (113.8)Water In -- GPM (L/s) 75°F DB, 62.5°F WB (23.9°C DB, 16.9°C WB) 30.7 (1.9)Pressure Drop -- PSI (kPa) 75°F DB, 62.5°F WB (23.9°C DB, 16.9°C WB) 7.9 (54.4)Water In -- GPM (L/s) 75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 31.1 (2.0)Pressure Drop -- PSI (kPa) 75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 8.1 (55.8)Water In -- GPM (L/s) 72°F DB, 60°F WB (22.2°C DB, 15.5°C WB) 25.8 (1.6)Pressure Drop -- PSI (kPa) 72°F DB, 60°F WB (22.2°C DB, 15.5°C WB) 5.6 (38.6)Water In -- GPM (L/s) 72°F DB, 58.6°F WB (22.2°C DB, 14.8°C WB) 25.7 (1.6)Pressure Drop -- PSI (kPa) 72°F DB, 58.6°F WB (22.2°C DB, 14.8°C WB) 5.6 (38.6)Water In -- GPM (L/s) 70°F DB, 58.5°F WB (21.1°C DB, 14.8°C WB) 22.2 (1.4)Pressure Drop -- PSI (kPa) 70°F DB, 58.5°F WB (21.1°C DB, 14.8°C WB) 4.1 (28.3)Water In -- GPM (L/s) 70°F DB, 57.2°F WB (21.1°C DB, 14.0°C WB) 22.1 (1.4)Pressure Drop -- PSI (kPa) 70°F DB, 57.2°F WB (21.1°C DB, 14.0°C WB) 4.1 (28.3)

AIR SYSTEM -- DIRECT DRIVE CENTRIFUGALAir Volume -- CFM (M3/H) - Single Coil 8,500 (4011)

Air Volume -- CFM (M3/H) - Dual Coil 8,000 (13592.1)Blower Motor -- HP (kW) 4 (2.98)External Static Pressure -- inches of water (Pa) 0.3 (75)Number of Blowers 2

COMPRESSOR -- TANDEM SCROLLEER 14Quantity 2Nominal HP (kW) 14.8 (11)

EVAPORATOR COIL -- V FRAME, COPPER TUBE/ALUMINUM FINFace Area -- ft2 (m2) 21 (1.95)Rows Deep 3Face Velocity -- FPM (m/s) 405 (2.06)

HUMIDIFICATION --- SOLID STATE ELECTRODE CANISTERFlush Cycle automaticCapacity -- Lbs/hr (Kg/hr) 10 (4.53)kW 3.2

FILTERSQuantity 5Size -- Inches (mm) 12.8×29.0 (325×737)Depth -- Inches (mm) 4 (100.8)

REHEATElectric -- Equally Loaded Three (3) Phase, Finned Tubular, Low-Watt Density - SCR Controlled

Capacity -- BTU/HR (kW) Includes Motor Heat*** 47,000 (13.8)

Performance Specifications—Air Cooled




PHYSICAL DATAWeight -- lbs (kg)**** 1290 (585.1)Height -- Inches (mm) 76.89 (1953)Length -- Inches (mm) 70.87 (1800)Depth -- Inches (mm) 35 (889)

CONNECTION SIZES (Not recommended piping sizes. All water/steam piping is nominal.)Air

Liquid Line -- inches (od) 7/8Discharge Line -- inches (od) 1-1/8

HumidifierSupply Line -- inches 1/4

Condensate DrainDrain Line -- inches 1/2

MultiCoolSupply Line -- inches 1-1/2Return Line -- inches 1-1/2




Performance Specifications—Water CooledNET COOLING CAPACITY - BTU/HR (kW)* FM DX









Total - 1 Compressor 87,729Sensible - 1 Compressor 61,778Total - 2 Compressors 153,276Sensible - 2 Compressors 91,334



COOLANT REQUIREMENTSTHR -- MBH (kW) 280,358 (82.1)105 °F (40.6 °C) Glycol In -- GPM (L/s) 56 (3.5)

Pressure Drop w/HX -- PSI (kPa) 8.4 (57.9)WATER REGULATING VALVES

Size -- 3 Way Ball Valve -- Inches, NPT (Cv)**** 1-1/2 (35)AIR SYSTEM -- DIRECT DRIVE CENTRIFUGAL

Air Volume -- CFM (M3/H) 8500 (4011)Blower Motor -- HP (kW) 4 (3)External Static Pressure -- inches of water (Pa) 0.3 (75)Number of Blowers 2

COMPRESSOR -- TANDEM SCROLLEER 16.8Quantity 2 (tandem)Nominal HP (kW) 14.8 (11)

*Rated Capacity +/-10%**Nominal Rating Point****3-Way Single Seated, 400 PSI W.W.P. max*****With equal loading on each phase, rated at 208-230V / 3-phase, 480V / 3-phase


Performance Specifications—Water Cooled

EVAPORATOR COIL -- V FRAME, COPPER TUBE/ALUMINUM FINFace Area -- ft2 (m2) 21 (1.95)Rows Deep 3Face Velocity -- FPM (m/s) 405 (2.06)



REHEATElectric -- Equally Loaded Three (3) Phase, Finned Tubular, Low-Watt Density

Capacity -- BTU/HR (kW) Includes Motor Heat***** 47,000 (13.8)PHYSICAL DATA

Weight -- lbs (kg) 1350 (612)Height -- Inches (mm) 76.89 (1,953)Length -- Inches (mm) 70.87 (1,800)Depth -- Inches (mm) 35.00 (889)

CONNECTION SIZES (Not recommended piping sizes. All water/steam piping is nominal.)Water In/Out -- Inches 1-1/2Humidifier

Supply Line -- Inches 1/4Condensate Drain

Drain Line -- Inches 1/2

Performance Specifications—Water Cooled

*Rated Capacity +/-10%**Nominal Rating Point****3-Way Single Seated, 400 PSI W.W.P. max*****With equal loading on each phase, rated at 208-230V / 3-phase, 480V / 3-phase


Performance Specifications—Glycol Cooled

Performance Specifications—Glycol CooledNET COOLING CAPACITY - BTU/HR* FM DX









Total - 1 Compressor 78,360 (22.9)Sensible - 1 Compressor 60,318 (17.7)Total - 2 Compressors 138,614 (40.6)Sensible - 2 Compressors 86,647 (25.4)



*Rated Capacity +/-10%**Nominal Rating Point****3-Way Single Seated, 400 PSI W.W.P. max*****With equal loading on each phase, rated at 208-230V / 3-phase, 480V / 3-phase******Add 150lbs (68kg) when Economizer or MultiCool option is selected



ECONOMIZER -- NET COOLING CAPACITY DATA -- BTU/HR (kW) @ 45°F (7.2°C) EWT*80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 50% RH

Total 125,796 (36.9)Sensible 117,505 (34.4)







ECONOMIZER -- NET COOLING CAPACITY DATA -- BTU/HR (kW) (DX MODE)80°F DB, 67°F WB (26.7°C DB, 19.4°C WB) 50% RH

Total 153,307 (44.9)Sensible 128,107 (37.5)







COOLANT REQUIREMENTSTHR -- MBH (kW) 250,000 (73.2)105 °F (40.6 °C) Glycol In -- GPM (L/s) 40.1 (2.5)

Pressure Drop w/HX -- PSI (kPa) 4.3 (29.6)Pressure Drop w/HX, Econ Coil -- PSI (kPa) 11.4 (78.6)

WATER REGULATING VALVESSize -- 3 Way Ball Valve -- Inches, NPT (Cv)**** 1-1/2 (35)

AIR SYSTEM -- DIRECT DRIVE CENTRIFUGALDual Coil Air Volume -- CFM (M3/H) 8000 (13592.1)Single Coil Air Volume -- CFM (M3/H) 8500 (14441.6)Blower Motor -- HP (kW) 4 (3)External Static Pressure -- inches of water (Pa) 0.3Number of Blowers 2

COMPRESSOR -- TANDEM SCROLLEER 12.9Quantity 2 (tandem)Nominal HP (kW) 14.8

EVAPORATOR COIL -- V FRAME, COPPER TUBE/ALUMINUM FINFace Area -- ft2 (m2) 21 (1.95)





Rows Deep 3Face Velocity -- FPM (m/s) 405 (2.06)



REHEATElectric -- Equally Loaded Three (3) Phase, Finned Tubular, Low-Watt Density

Capacity -- BTU/HR (kW) Includes Motor Heat***** 47,000 (13.8)PHYSICAL DATA

Weight -- lbs (kg)****** 1350 (612)Height -- Inches (mm) 76.89 (1,953)Length -- Inches (mm) 70.87 (1,800)Depth -- Inches (mm) 35.00 (889)

CONNECTION SIZES (Not recommended piping sizes. All water/steam piping is nominal.)Glycol In/Out -- Inches 1-1/2Humidifier

Supply Line -- Inches 1/4Condensate Drain

Drain Line -- Inches 1/2




Electrical Data

Electrical Data

Air CooledReheat Electric

Humidifier Electrode Canister - SteamVoltage 208 230 480

OA-w/DX 93.1 88.6 43.7OA-w/DX&MultiCool 96.7 91.8 45.3

WSA/MCA 128.7 128.7 64.2MOP 150.0 150.0 70.0

Water CooledReheat Electric


OA-w/DX N/A N/A 41.6OA-w/DX&MultiCool N/A N/A 43.2

WSA/MCA N/A N/A 64.2MOP N/A N/A 70.0

Glycol CooledReheat Electric


OA-w/DX N/A N/A 44.6OA-w/DX&MultiCool N/A N/A 46.2

WSA/MCA N/A N/A 64.2MOP N/A N/A 70.0

OA = Operating Amps, WSA/MCA = Wire Size Amps/Minimum Circuit Amps, MOP = Maximum Overcurrent Protection

Peak Inrush CurrentBlowers and Cooling Only Blowers and Cooling With Reheat

Voltage Blowers Only* 1st Compressor 2nd Compressor** 1st Compressor 2nd Compressor**230/3/60 19.5 215.5 247.6 239.3 271.4430/3/60 9.7 109.7 126.1 121.6 138.0

*RLA, no peak inrush value**Minimum 60 seconds between stages


Dimensional Data

FM Downflow

Dimensions are shown in mm (in).

na02

14a

410 ( )16.1220 ( )8.7 400 ( )15.8

300 ( )11.8

459 ( )18.1

400 ( )15.8

na10

17a


Dimensional Data

FM Upflow

Dimensions are shown in mm (in). na

0329

a


Dimensional Data

FM Floorstand


FM Sub-Base - Upflow


Floorstands (With Air Deflectors)

SKU Height (inches) Range (inches)ACFS74121 12 Adjustable 10.5-13.5ACFS74122 15 Adjustable 13.5-16.5ACFS74123 18 Adjustable 16.5-19.5ACFS74124 21 Adjustable 19.5-22.5ACFS74125 24 Adjustable 22.5-25.5ACFS74131 12 Seismic Adjustable 10.5-13.5ACFS74337 15 Seismic Adjustable 13.5-16.5ACFS74132 18 Seismic Adjustable 16.5-19.5ACFS74338 21 Seismic Adjustable 19.5-22.5ACFS74133 24 Seismic Adjustable 22.5-25.5

Sub-BasesSKU Description

ACSB74087 SB Assembly, 35-50 kW - BLACK

na02

05a

na02

29a


Dimensional Data

FM 20-Inch Upflow Plenum


FM 24-Inch Upflow Plenum


Plenum Information

SKU Description

ACPL74091 Plenum, 20" FT/RT/LT, FM 35-50 kW - BLACKACPL74095 Plenum, 24" FT/RT/LT, FM 35-50 kW - BLACKACPL74096 Plenum, 24" FT/RT, FM 35-50 kW - BLACKACPL74097 Plenum, 24" FT/LT, FM 35-50 kW - BLACKACPL74098 Plenum, 24" FT, FM 35-50 kW - BLACK

na03

82a

na02

31a


Air-Cooled Condensers

Two-Fan Air-cooled Condenser

Dimensions are shown in mm (in)Three-Fan Air-cooled condenser

Dimensions are shown in mm (in)

Air-Cooled Condenser—Performance/Electrical Data

OHE SKU Voltage Ambient Temperature

Air Quantity Fan/Motor Connection Size (inches)

Weight Electrical DataCFM L/s Qty. HP RPM Lbs Kg FLA MCA MOP

ACCD75304 208-230/3/60 95° F 20,500 34,830 2 1.5 1140 1-3/8 580 263 14.0 20.0 35.0ACCD75305 460/3/60 95° F 20,500 34,830 2 1/3 1140 1-3/8 580 263 7.0 15.0 15.0ACCD75307 208-230/3/60 105° F 19,000 32,280 2 1.5 1140 2-1/8 680 308 14.0 20.0 35.0ACCD75308 460/3/60 105° F 19,000 32,280 2 1.5 1140 2-1/8 680 308 7.0 15.0 15.0ACCD75310 208-230/3/60 115° F 28,500 48,420 3 1.5 1140 2-1/8 1000 453 21.0 22.8 40.0ACCD75311 480/3/60 115° F 28,500 48,420 3 1.5 1140 2-1/8 1000 453 10.5 15.0 20.0*Specifications given for conditions at sea level.FLA = Full Load AmpsMCA = Minimum Circuit AmperesMOP = Maximum Overcurrent Protection

na00

44a

na00

49a


Fluid Coolers

Three-Fan Fluid Cooler


Glycol-cooled Fluid Cooler—Performance/Electrical Data

OHE SKU Voltage Ambient Temperature

40% Ethylene Glycol @130F

Air Quantity Fan/Motor Connect-ion Size (inches)

Weight Glycol Volume Electrical Data

PD(ft) @GPM CFM L/s Qty HP RPM Lbs Kg Gal L FLA MCA MOP

ACFC75203 480/3/60 95°F 4.6@30 34,800 16,424 3 1-1/2 1140 (2) 2-5/8 1190 540 13.0 49.1 10.5 11.4 15.0ACFC75168 480/3/60 105°F 4.8@40 43,900 20,718 4 1-1/2 1140 (2) 2-1/8 1620 735 18.5 70.0 14.0 14.9 15.0FLA = Full Load AmpsMCA = Minimum Circuit AmperesMOP = Maximum Overcurrent Protection

APC PART VOLTAGEACFC75202 208-230/3/60ACFC75203 480/3/60

na00

47a


Fluid Coolers

Four-Fan Fluid Cooler


Four-Fan Low-Noise Fluid Cooler


APC PART VOLTAGEACFC75167 208-230/3/60ACFC75168 480/3/60

APC PART VOLTAGEACFC75164 208-230/3/60ACFC75165 480/3/60ACFC75161 208-230/3/60ACFC75162 480/3/60

na00

16a

na00

65a


Pump Specifications

Pump Performance

Pump Connection Sizes

Pump Electrical Data

HP (kW) 3/4 (.56) 1 (.75) 1.5 (1.1) 2 (1.5)

LINE Suction Discharge Suction Discharge Suction Discharge Suction Discharge

Size (inches) 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 1-1/2 1-1/4

HP (kW) 3/4 (.56) 1 (.75) 1.5 (1.1) 2 (1.5)

VOLTAGE FLA MCA FLA MCA FLA MCA FLA MCA

480/3/60 1.6 2.0 1.9 2.4 2.5 3.1 3.1 3.9

Single pump SKUs

ACPP2286 ACPP2289 ACPP2292 ACPP2295

Dual pump SKUs

ACPP2298 ACPP2301 ACPP2304 ACPP2307

*Values are calculated based on 3-phase power.FLA = Full Load AmperesMCA = Minimum Circuit Amperes

20

30

50

60

10

70

80

90

100

110

120

40

0

25

30

35

40

5

10

15

20

TOTA

L DY

NAMI

C HE

AD IN

MET

ERS

TOTA

L DYN

AMIC

HEA

D IN

FEE

T

BHP

ABSO

RBED

20 30 50 6010 70 80 90 10040CAPACITY IN U.S. GALLONS PER MINUTE

0 1.0 2.0 3.0 4.0 5.0 7.0

20

30

50

60

10

70

80

90

100

40

PERCENT EFFICIENCY

CAPACITY IN LITERS PER SECOND

3600 R.P.M.

6.0 8.0 9.0 10

110 120 130

130

2 HP

1.5 HP

1 HP

0.75 HP

na03

49a


Pump Specifications

FM Single Pump Package


FM Dual Pump Package


na12

07a

na12

08a


Piping Connections

Dimensions are shown in millimeters, with inches in parentheses.

Air outlets (downflow only) Main power in

Water/glycol out or discharge line out Downflow power entry

Water/glycol in or liquid line in Condensate pump out

MultiCool out Humidifier fill

MultiCool in Spare

Control interface access

130.5 5.14 ( )

187.5 7.38 ( )

120.3 4.74 ( )

215.8 8.50 ( )

283.8 11.17 ( )629.1 24.77 ( )

83.8 3.30 ( )100.0 3.94( )

265.5 10.45 ( )

327.0 12.87 ( )

257 10.12 ( )

na12

15d


Electrical Connections

Input circuit breaker—main power Controller board

Circuit breakers Not used

Fuse block Console port (user interface)

Power distribution block Display interface port

Variable frequency drive (VFD) for blowers AC line reactors

Control transformers Contactors

Smoke detector Ground block

Network management card Reheat silicon-controlled rectifier (SCR) control

na04

50d


Guidelines for Installation

The NetworkAIR FM provides reliable, accurate temperature and humidity control of computer rooms, laboratories, and other environments that require close tolerance control. The unit incorporates the latest system design innovations to provide you with optimum efficiency, reliability, and accuracy of control.

The NetworkAIR FM system will provide years of trouble-free service, when installed and maintained by technically qualified personnel.

Room preparationDuring the design of the room, consideration should be given to the following factors: ease of entry for the system, floor-loading factors, and accessibility of piping and wiring.

The room must be sealed with a vapor barrier to minimize migration of moisture. Polyethylene film (plastic sheeting) is a good vapor barrier for ceiling and wall applications. Rubber- or plastic-based paints should be applied to concrete floors and walls. The room should be thoroughly insulated to minimize thermal loads and make-up air (if required) should be preconditioned to reduce additional temperature, filtration, and moisture loads.

A room using a raised-floor plenum for air distribution should have a finished floor height no less than 18 in (457 mm). The area under the floor should be generally free from obstructions. Pay special attention to the location of pipe chases, electrical conduits and other obstructions under the floor. These objects can block air circulation and cause loss of air pressure, thus reducing system efficiency and causing hot spots in the room.

Unit location

The location of the unit is important for efficient and balanced environmental control in the room. Contact an APC representative for assistance in locating equipment in the room. If poorly installed, erratic control or mechanical fail-ure can result.

Service access

At least 914 mm (36 in) of clear space must be left in front of the unit for routine service (filters, humidifier). Down-flow units with a ducted return should have an access panel field installed to allow for filter replacement.

Receiving the unit

The NetworkAIR FM unit has been completely tested and inspected prior to shipment. To ensure that the unit received is in excellent condition, perform a careful inspection of the crating and the unit immediately upon receipt. Verify that all parts ordered were received as specified and that the unit is the correct size and voltage necessary to fulfill the environmental control needs. Report any damage discovered to the freight carrier. If necessary, contact the APC field service department for help in repairing or replacing damaged parts. While APC is not responsible for damage incurred in transit, we want to make sure that there are no undue delays in the system start-up.



Rigging

The unit is manufactured with a formed steel frame for maximum strength and unit integrity. However, as with all electrical and mechanical equipment, take care with proper rigging of the unit.

When using a forklift to move the unit, use the shipping skid to protect the bottom of the unit. When hoisting the unit from above, use spreader bars to prevent damage to the unit.

Floorstand

Follow the directions provided with the floorstand for proper installation.

Utility connections

All connections are made through the bottom left of the unit (the left side of upflow discharge units) for ease of ser-vice connections. Refer to the installation manual for pipe sizes and specific locations for the unit.

Power to the unit

The NetworkAIR FM unit uses 3-phase power for operation. Power connections are routed through either a floor-stand or a sub base. Bring the service cable through the bottom left of the unit and through the bulkhead hole into the electrical box to the circuit breaker provided on the left side of the electrical box. The ground lug is located near the 3-phase high-voltage connector. THE UNIT MUST BE UTILITY GROUNDED OR THE WARRANTY IS VOID.

Humidifier connectionsA 1/4"OD copper tube is provided for connection to the cold water supply. Field-installed isolation valves and water filters are recommended.

Condensate drain

Condensate from the evaporator pan is collected and discharged by the condensate pump. Condensate drain line is 1/2 in OD copper tubing.



Water supply to humidifier1. The humidifier fill valve orifice is sized for supply water pressure from 103.4 kPa (15 PSI) to 1034

kPa (115 PSI).2. For cases above 1034 kPa (115 PSI), install a pressure-reducing valve in the water feed line to the

unit.3. With extremely dirty or muddy water sources, proper filtration is required on the unit’s incoming

water line. 4. DO NOT use softened water with the humidifier. Softened water is too conductive.5. DO NOT use completely demineralized water with the humidifier. The minerals allow the electrode

principle to work.6. DO NOT use a hot water source. Doing so will cause deposits that will eventually block the fill valve

orifices. Supply water temperature should be between 34-104° F (1-40° C).7. Water supplies with high conductivity (above 800 uS/cm) must be preconditioned for proper opera-

tion and longevity of the humidifier.8. Water supplies with low conductivity (less than 125 uS/cm) may require a low conductivity cylinder

(contact the APC configuration team). When the cylinder is first installed, a teaspoon of salt or an Alka-Seltzer tablet may be required to start humidification. If conductivity is less than 75 uS/cm, water treatment may be necessary.

Limit Values For Medium-high Conductivity Supply Water Of A Humidifier With Immersed Electrodes

LIMITSMIN MAX

Hydrogen Ions pH - 7 8.5Specific Conductivity at 20°C óR, 20 °C - µS/cm 300 1250Total Disolved Solids TDS - mg/1 (1) (1)Dry Residue at 180°C R180 - mg/1 (1) (1)Total Hardness TH - mg/1 CaCO3 100 (2) 400Temporary Hardness - mg/1 CaCO3 60 (3) 300Iron + Manganese - mg/1 Fe+Mn 0 0.2Chlorides - ppm C1 0 30Silica - mg/1 SiO2 0 20Residual Chlorine - mg/1 C1- 0 0.2Calcium Sulphate - mg/1 CaSO4 0 100Metallic Impurities - mg/1 0 0Solvents, Diluents, Soaps, Lubricants - mg/1 0 01) Values depending on specific conductivity; in general: TDS≅ 0.93∗ó 20; R180≅ 0.65∗ ó 20(2) Not lower than 200% of chlorides content in mg/1 of C1-

(3) Not lower than 300% of chlorides content in mg/l of C1-



Condenser water supply

A 16-20 mesh/1000 micron strainer must be installed in the water supply to the water units to prevent clogging of brazed plate condenser. This is a field supplied item which is also recommended on glycol cooled units. Installation of field supplied water balancing valves is recommended.

Refrigerant pipingRefrigerant piping should be properly selected based upon minimal pressure drop and sufficient refrigerant velocities under all reduced load operating conditions. Discharge and liquid lines should not exceed 200 equivalent feet (61m). Consult Applications Engineering if equivalent lengths are excessive.Note: Because of an ongoing program dedicated to product improvement, specifications are subject to revisions with-out notice. APC assumes no responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions.

Limit Values For Medium-low Conductivity Supply Water Of A Humidifier With Immersed Electrodes

LIMITSMIN MAX

Hydrogen Ions pH - 7 8.5Specific Conductivity at 20°C óR, 20 °C - µS/cm 125 500Total Disolved Solids TDS - mg/1 (1) (1)Dry Residue at 180°C R180 - mg/1 (1) (1)Total Hardness TH - mg/1 CaCO3 50 (2) 250Temporary Hardness - mg/1 CaCO3 30 (3) 150Iron + Manganese - mg/1 Fe+Mn 0 0.2Chlorides - ppm C1 0 20Silica - mg/1 SiO2 0 20Residual Chlorine - mg/1 C1- 0 0.2Calcium Sulphate - mg/1 CaSO4 0 60Metallic Impurities - mg/1 0 0Solvents, Diluents, Soaps, Lubricants - mg/1 0 01) Values depending on specific conductivity; in general: TDS≅ 0.93∗ó 20; R180≅ 0.65∗ ó 20(2) Not lower than 200% of chlorides content in mg/1 of C1-

(3) Not lower than 300% of chlorides content in mg/l of C1-


APC Worldwide Customer Support

Customer support for this or any other APC product is available at no charge in any of the following ways:• Visit the APC Web site to find answers to frequently asked questions (FAQs), to access documents

in the APC Knowledge Base, and to submit customer support requests.– www.apc.com (Corporate Headquarters)

Connect to localized APC Web sites for specific countries, each of which provides customer support information.

– www.apc.com/support/Global support with FAQs, knowledge base, and e-support.

• Contact an APC Customer Support center by telephone or e-mail.– Regional centers:

– Local, country-specific centers: go to www.apc.com/support/contact for contact information.

Contact the APC representative or other distributor from whom you purchased your APC product for information on how to obtain local customer support.

APC headquarters U.S.,Canada (1)(800)800-4272 (toll free)

Latin America (1)(401)789-5735 (USA)

Europe, Middle East, Africa (353)(91)702020 (Ireland)

Asia Pacific (61) 2 9955 9366 (Australia)

Entire contents copyright © 2007 American Power Conversion. All rights reserved. Reproduction in whole or in part without permission is prohibited. APC, the APC logo, and

NetworkAIR are trademarks of American Power Conversion Corporation and may be registered in some jurisdictions. All other trademarks, product names, and corporate names

are the property of their respective owners and are used for informational purposes only.

990-3176 11/2007

®

http://www.apc.com

http://www.apcc.com/support

http://www.apc.com/support/contact

tm computer room air-conditioning—60 hz · when hot spots exist in close proximity to the air...

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