Data Aire - Floor Units

DESIGN FEATURES

FRAME AND CABINET

The heliarc welded tubular steel frame provides for maximum strength and ease of access. Side and front panels can be easily opened and removed with quarter-turn fasteners allowing full access to all unit components. All panels include one inch thick, 1-1/2 pound density insulation for protection and sound attenuation.

COIL SECTION

Designed for draw through application, the computer selected coil offers greater efficiency in the cooling and dehumidification process. Air bypass is provided to prevent saturated air from being introduced into the controlled space. The coil section is provided with a stainless steel drain pan.

FAN SECTION

The centrifugal, forward curved, double width, double inlet blower configuration is engineered for quiet reliable operation. The belt driven variable pitch drive section provides adjustable airflow capability to match load requirements of the controlled space. The draw through design insures even air distribution across the coil and bypass, low internal cabinet losses, and static sealing of

the filter section. Motors are mounted on an adjustable slide base and have internal overload protection.

FILTER SECTION

Units are provided with 2 inch deep, 30% efficient filters (based on ASHRAE Std. 52-76).

ELECTRIC REHEAT

Low-watt density finned tubular sheathed coils provide ample capacity to maintain room drybulb conditions during a call for dehumidification. Low-watt density coils eliminate ionization associated with open air electric resistance heating. Three stages of reheat are standard.

HUMIDIFICATION

Data Temp units include an electric steam generator humidifier with a "quick change" disposable cylinder and an auto-flush cycle. The steam generator humidifier with its patented control system optimizes cylinder life and energy efficiency by concentrating incoming water to a predetermined conductivity much higher than that of the entering water. The control system continuously monitors the conductivity in the cylinder through its electronics which allows water to be flushed as often as is necessary to maintain the capacity at this design conductivity. The high design conductivity results in a minimum flushing of heated water, thereby saving energy. The humidifier is designed to allow units at any voltage to produce full rated steam output at an optimum water level based on the design conductivity.

COMPRESSORIZED SYSTEMS

The single stage refrigeration circuit includes a hermetic scroll type

compressor. These durable, heavy duty, fully welded compressors have no

gaskets or seals, eliminating the possibility of refrigerant or oil leaking into the controlled space or environment. Scroll compressors also bring a combination of reliability, efficiency, and improved system sound performance. The refrigeration circuit includes built-in compressor overload protection, crankcase heater, filter drier, sight-glass, adjustable expansion valve with external equalizer, low pressure override timer (air cooled units), manual reset high pressure control, and compressor short cycle timer.

Water/glycol cooled units include a counterflow coaxial condenser sized to provide the required capacity for heat rejection with minimum water/glycol flow and low total pressure drop. Head pressure regulating valves control the condensing temperature and maintain required capacity at various water/glycol flow rates and temperatures.

Air Cooled with Remote Outdoor Condenser - A wide range of outdoor condensers are available. Condensers are manufactured by Data Aire and sized to meet the heat rejection and ambient conditions as required. The industrial duty design includes galvanized corrosion resistant housing, aluminum finned copper tube coils, coated fan guards, energy efficient thermally protected direct drive motors, and variable fan speed control on lead fan motor for control down to -20° F. Additional fan motors are controlled with ambient thermostats.

Air Cooled with Indoor Condenser - A wide range of floor mounted indoor condensers with horizontal intake and discharge are available for applications where an outdoor condenser cannot be used. Units include a forward curved, double width, double inlet blower engineered for quiet, reliable operation. The belt driven variable pitch drive section provides adjustable air flow.

Indoor condensers are provided with a factory mounted and piped receiver. The receiver has a head pressure control valve to maintain flooded condenser control.

Air Cooled with Outdoor Condensing Unit - Data Temp units are also available with remote outdoor condensing units. The condensing unit includes a hermetic scroll compressor with built-in overload protection, crankcase heater, filter drier, sight-glass, and condenser coil. The coil is constructed with copper tubes and aluminum fins. The housing is galvanized steel with vertical air discharge. The condenser fan is a variable speed type for head pressure control down to -20° F.

Water/Glycol Cooled with Remote Outdoor Dry Cooler - Remote outdoor dry coolers are available in a variety of sizes. Each dry cooler includes galvanized corrosion resistant housing, aluminum finned copper tube coil, coated fan guards, surge tank, pump contactor, and energy efficient thermally protected direct drive motors. Fan cycling is controlled by ambient thermostats dry coolers with more than one fan.

CHILLED WATER SYSTEMS

Chilled water systems include all the same features of the Data Temp product line. Designed for draw through application, the computer selected coil offers greater efficiency in the cooling and dehumidification process. Air bypass is water provided to prevent saturated air from being introduced into the controlled space. Chilled flow is controlled by a 3-way modulating valve for accurate and economical temperature control and dehumidification.

CONTROL SYSTEM

The microprocessor based Data Alarm Processor-II (DAP-II) offers the definite answer for precision environmental control. The DAP-II control system not only monitors temperature, humidity, airflow, and cleanliness, it provides component runtimes, alarm history, and an automatic self-test of the microprocessor on system start-up. All messages are presented in a clear

vernacular format and are sequentially displayed on a 2 row, 80 character, backlit liquid crystal display (LCD).

Operation - High reliability, flat, sealed switches with tactile feedback allow unit on/off operation, menu selection for programming, operational information, diagnostics, and historical data. Multilevel passwords prevent unauthorized access. Alarm conditions are enunciated by an audible alarm. The alarm silence switch will quiet the audible alarm but the display will continue to indicate the alarm condition until the problem is corrected.

Standard Features

• Forward/Backward Menu Access

• Multilevel Password Access

• Stand Alone Panel

• Automatic Self-Test Diagnostics

• Database of Unit & Room Conditions

• All Settings from Face of Panel

• Factory Calibrated Temperature Sensor

• Factory Calibrated Humidity Sensor

• All Programmed Functions Saved in EEPROM

• Battery Back-Up for Historical Data

Operational Features

• Selectable Control Type

• Sequential Load Activation

• Temperature Anticipation

• Humidity Anticipation

• Energy Saver Operation

• Auxiliary Chilled Water Operation

• Dehumidification Mode Lockout

• Automatic Compressor Rotation

• Automatic Reheat Element Rotation

• Start Time Delay

• Compressor Short Cycle Control

• Automatic or Manual Restart

• Supplemental Compressor Operation with Energy Saver

• Chilled Water, Energy Saver, Hot Water Coil Flush Cycle

Diagnostic & Service Features

• Manual Diagnostic Program

• Alarms Displayed in Order of Occurrence

• Manual Override for Blower

• Adjustable Alarm Limits

Cool

Heat 1

Humidification

Water Valve

• Programmable Delays for Optional Alarms

• Four Programmable Optional Alarms

• Programmable Remote Alarm

• Select Alarms Optionally Disabled

• Audio Alarm Tone

Protective & Safety Features

• Metal Shell Enclosure

• Sealed Front Control Panel

• Isolation Transformer

• Opto-Coupler Signal Inputs

• Protected 24 VAC Power Input

• Heavy Ground Planes & Power Foils

• Watch Dog Timer

• Fused RS-485 Network Lines

• Network Bypass Relays

.Switching Power Supply

Programmable Functions - The user friendly Menu Selection switches permit step-by-step programming of the following selections:

• Temperature Setpoint: 65-85° F/18.3-29.4° C

• Temperature Deadband: +/- 1-5° F/C

• High Temperature Alarm Limit: 70-90° F/21.1-32.2° C

• Low Temperature Alarm Limit: 55-75° F/12.8-23.9° C

• Humidity Setpoint: 30-70% RH

• Humidity Deadband: 1-15% RH

• High Humidity Alarm Limit: 35-90% RH

• Low Humidity Alarm Limit: 10-65% RH

• Reset Equipment Times for:

Blower

Compressor

Reheat 1

Humidifier

Dehumidification

Reset All to Zero

• Mode & Stage Response Time

1 to 5 minutes

• Audio Alarm Mode

None

Long

Full

Short Beep

• Automatic Self-Test Acknowledgement

Off

• Manual Diagnostics

Stay in Normal Menu Mode

Change to Diagnostic Mode

• Humidity Anticipation

Off

• Compressor Short Cycle Alarm

Off

• Compressor Supplements to Energy Saver

Energy Saver not available

Energy Saver with No Compressor

Energy Saver with Compressor

• Dehumidification Mode

Compressor within Reheat Limits

Compressor with No Reheat Limits

Dehumidification Off

• Low Discharge Temperature Alarm Limit*0

45-60° F/7.2-15.6° C

Disable Low Discharge Temperature Alarm

• Power Failure or Restart Mode

Automatic

Manual

• System Start Delay

0-10 Minutes in 5 Second Increments

• Delay for Optional Alarm 1, 2, 3, & 4

0-900 Seconds

Off

• Message for Optional Alarm 1, 2, 3, & 4

Custom Message*

Fan Motor Overload*

Local Alarm

Standby Pump On*

UPS/Alternate Power On*

Reheat Inhibited

Humidification Inhibited

Reheat & Humidification Inhibited

• Person to Contact on Alarm

Contact Message Not Used

Data Processing Manager

Maintenance Engineer

Service Company

25 Space Custom Message*

• Define Password: 00-99

• Humidifier Auto-Flush Timer

Auto-Flush Timer Not Used

6 Hours

12-96 Hours in 12 Hour Increments

• Temperature Scale

Fahrenheit

CentigradePID

• Unit & Network ID NumberSetpoint Deviation

• Remote Alarm 1, 2, 3, Selection*

Compressor Short Cycle

Custom Message 1, 2, 3, & 4*

Dirty Filter

Discharge Air Sensor Problem*

Fan Motor Overload*

Firestat

High Humidity

Compressor High Pressure

High Temperature

Humidifier Problem

Humidifier Sensor Problem

Local Alarm 1, 2, 3, & 4*

Low Humidity

Compressor Low Pressure

Low Temperature

Low Voltage

Maintenance Required

Manual Override

No Airflow

No Water Flow*

Power Problem or Restart

Smoke Detector*

Standby Pump On*

Temperature Sensor Problem

Water Detection Probe

UPS/Alternate Power On

Reheat Inhibited

Humidification Inhibited

Reheat & Humidification Inhibited

• System Start Delay

0-10 Minutes in 5 Second Increments

• Firestat Temperature Alarm Limit

Unit Shutdown & Alarm @ 100-150° F

Scheduled Normal Maintenance

1-1000 Hours

• Temperature Scale

• Control Logic

Smart Logic

PID

Setpoint Deviation

• Temperature Sensor: +9.9° F/C

• Calibrate Humidity Sensor: +30% RH

• Calibrate Discharge Air Sensor: +9.9° F/C

• Compressor

Primary

None

• Reheat Stages

None

Hot Water*

• Humidifier

None

Computer, Non-Modulating

Computer, Modulating*

Comfort, Non-Modulating

Comfort, Modulating*

• Water Valve Mode

None

Chilled Water Cooling

Energy Saver Cooling

Auxiliary Chilled Water Cooling

• Water Valve Voltage Range

0-10 VDC

4-7 VDC

6-9 VDC

7-10 VDC

• Reverse Acting Valve

Yes

Displayed Conditions, Data, & Functions - The Data Alarm Processor-II displays and monitors the following conditions, data, and functions:

• Temperature Setpoint

• Humidity Setpoint

• Current Temperature

• Current Humidity

• Current Percent of Capacity Utilized

• Current Discharge Air Temperature*

• Unit or Network ID Number

• Zone Number

• Cooling

• Reheat

• Humidifcation

• Dehumidification

• Energy Saver Cooling

* Some of the programmable selections, displays, or alarms may require additional components or sensors.

Alarms - Alarm conditions are displayed and monitored on the microprocessor LCD along with an audible alarm. The alarm silence switch will quiet the audible alarm but the display will continue to indicate the alarm condition until it is corrected. The following alarms are displayed:

• High Temperature Warning

• Low Temperature Warning

• High Humidity Warning

• Low Humidity Warning

• Compressor High Pressure

• Compressor Low Pressure

• Under Floor Water Detection

• No Air Flow

• Dirty Filter

• Humidifier Failure

• Manual Override

• Firestat Tripped

• Low Voltage Warning

• Power Failure Restart

• Compressor Short Cycle

• Temperature Sensor Error

• Humidity Sensor Error

• Maintenance Required

• Custom Message*

• Local Alarm*

• Discharge Air Sensor Error*

• Fan Motor Overload*

• No Water Flow*

• Smoke Detector

• Standby Pump On*

• Person to Contact on Alarm*

Some of the programmable selections, displays, or alarms may require additional components or sensors.

Historical Data - In order to facilitate maintenance and service, historical data can be recalled and displayed. The historical database is maintained by battery back-up should power fail. The following data can be recalled and displayed:

• High Temperature, Last 24 Hours

• Low Temperature, Last 24 Hours

• High Humidity, Last 24 Hours

• Low Humidity, Last 24 Hours

• Average % of Capacity Last Hour

• Alarm History, Last 10 Alarms

• Equipment Runtimes

Optional Features

• Analog Inputs

• RS-485 Network

• Two Additional Remote Alarms

• Humidifier Flush Rate

• Modulating Humidifier Control

OPTIONS

Data Aire Remote Telecommunications System 200

The Data Aire Remote Telecommunications System 200 (DART-200) provides comprehensive monitoring and control of Data Aire units via a phone modem to a host PC station. The Data Aire units are interfaced with a communication module (DART-Board) with an integral phone modem.

The DART-200 allows complete monitoring, control and retrieval of Data Aire units through the unit mounted Data Alarm Processor-II. Upon an alarm at the unit, the DART-Board will automatically dial one or two preprogrammed numbers and transmit specific alarm information. All entry or configuration capabilities that are available at the Data Alarm Processor-II are accessible at the host station. The commands or requests for data from each unit are processed through the DART-Board. A single DART-Board will allow up to 32 Data Aire units to be connected and controlled. The DART-200 System is capable of monitoring and controlling up to 200 DART-Boards.

System Features

• Automatic Scrolling of Current Status

• Automatic Scrolling of Sensor Readings

• Sensor Database

• Sequential Display of Alarms

• Password Access

• Multiple Audio Alarm Modes

• Automatic Status Log Prints

• Custom "Help" Messages for Alarms

Programmable Functions

• Temperature Setpoint

• Humidity Sepoint

• Temperature High Limit

• Humidity High Limit

• Temperature Low Limit

• Humidity Low Limit

• Temperature Sensitivity (Deadband)

• Humidity Sensitivity (Deadband)

• On/Off/Standby Operation

• Unit Rotation

• Unit ID Number

• Zone Number

• Password

Monitored Conditions

• Specific Alarms from Unit(s)

• All Standard Alarms from Unit(s)

• Programmed Local Alarms from Unit(s)

• Current Operating Mode

• Current Temperature Sensor Readings

• Current Humidity Sensor Readings

Historical Data

• Alarm History for Last 10 Alarms in Order of Occurrence and Time Since Detected

• Current and Average Percent of Capacity for Last Hour

• Equipment Runtimes for:

Evaporator Motor,

Compressor,

Reheat,

Humidification,

Dehumidification

Energy Saver Coil - The Data Aire Energy Saver Coil is built into the system to provide total required capacity. Whenever the incoming water/glycol temperature is below 45° F/7.2° C, Energy Saver cooling is available. Energy Saver mode operates in the following range: Return air setpoint plus deadband plus two degrees. The Energy Saver will operate providing there is a need for cooling. The valve will open at setpoint plus deadband. The valve will modulate as long as the space is between setpoint plus deadband plus 2 degrees. If the temperature falls below the deadband minus setpoint, the valve will close and the space is considered satisfied. While still in Energy Saver with the valve modulating, if the temperature goes beyond setpoint plus deadband plus 2 degrees the Energy Saver valve will close and DX cooling will begin.

The Energy Saver Coil includes the next size motor, 3-way pressure control valve on condenser water circuit, 3-way valve on the economy coil and steam generator humidifier (as required). Common piping for coil and condenser is provided.

Energy Saver/Compressor Supplement - Units with the Energy Saver Coil can be provided with compressor supplement if the Energy Saver is not sufficient as a stand alone system. When the incoming water/glycol temperature is below the setpoint of the water changeover thermostat, the Energy Saver mode is enabled (even if there is no call for cooling). Upon a call for cooling (setpoint plus deadband), the valve will open proportionally - 10% for each 0.1° above setpoint plus deadband. The compressor will come on at setpoint plus deadband plus 1.0° (the valve is 100% open at this point). The compressor will go off at setpoint plus deadband plus 0.7°. The valve will close proportionally - 10% for each 0.1° below setpoint plus deadband. An air discharge sensor is factory installed.

Auxiliary Chilled Water Coil - Where an existing chilled water loop is available, units can be fitted with an auxiliary chilled water coil. Units will operate using the chilled water for cooling. Upon a loss of water flow or an increase in room temperature the system will bring on compressor (DX) cooling. The Auxiliary Chilled Water Coil includes the next size motor and a steam generator humidifier (as required). Separate piping is provided for the chilled water coil and refrigeration connections.

Auxiliary Chilled Water Coil/Compressor Supplement - The Auxiliary Chilled Water Coil can be provided with compressor supplement for extended savings by allowing the compressor to supplement operation as needed when the chilled water is not sufficient on a stand alone basis. An air discharge sensor is factory installed. (See Energy Saver/Compressor Supplement for details).

Remote Temperature & Humidity Sensors - Temperature and humidity sensors may be ordered for remote wall mounting. Sensors are provided in a wall mount plastic case for remote sensing of temperature and humidity. 25 feet of shielded cable is provided for field wiring.

Smoke Detector - A unit mounted smoke detector will shut down the unit if smoke is sensed. The unit mounted microprocessor will sound an alarm and display a "SMOKE DETECTED" message. The smoke detector is mounted in the return air stream and is provided with auxiliary contacts.

2-Stage Control - An electronically controlled hot gas bypass valve is available for 2-stage control. A solenoid valve allows hot gas to bypass. As the load increases, the solenoid valve closes electronically at 60 psi (adjustable). Should the load on the evaporator decrease to the point where the valve is below the desired setting, the solenoid valve will open allowing some hot gas to mix with the normal liquid discharge of the expansion valve raising the evaporator pressure. This reduces the cooling capacity of the unit to match the load.

Hot Water Reheat - Where hot water is available, a unit installed reheat coil is available. The coil is designed for 150 psi maximum water pressure and includes a 2-way valve (a 3-way valve is optional).

Hot Gas Reheat - Unit hot gas discharge is used for reheat and maximum system efficiency. (Note: Units with Hot Gas Bypass option are not available with hot gas reheat)

Unit Mounted Disconnect - A unit mounted non-automatic disconnect switch is installed in the high voltage electrical section. The operating mechanism prevents access to the high voltage electrical components until switched to the "OFF" position. The operating mechanism (handle) protrudes through the decorative door.

Hot Gas Bypass - Hot gas bypass may be ordered for changing load conditions. The hot gas bypass is installed between the compressor discharge line and the leaving side of the expansion valve through a side outlet distributor. The system with the evaporator under full load will maintain pressure on the leaving side of the hot gas bypass valve to keep the valve port closed. Should the load on the evaporator decrease to the point where the coil is below the desired setting, the pressure on the discharge of the hot gas bypass will put pressure on the diaphragm overcoming the spring pressure on the seat and allowing some hot gas to mix with the normal liquid discharge of the expansion valve raising the evaporator pressure. This reduces the cooling capacity of the unit to match the load.

3-Way Water Regulating Valve - 3-way water regulating valve for pressure control may be ordered to replace standard 2-way valve installed in unit. 3-way valves provide control of condensing temperature maintaining constant system capacity and condenser water flow.

Condensate Pump - Condensate pumps may ordered as factory installed or for field installation. Condensate pumps are complete with sump, motor, and automatic control. The pumps are rated for 130 GPH @ 20 foot maximum or 40 GPH @ 20 feet with check valve. Pumps shipped loose are available in 115, 230, or 460 volt.

Upflow Plenum - Upflow plenums are fully insulated with front discharge air grille. Side grilles for both or one side are available. Plenums are 18 inches high and are painted to match the unit color.

Floorstand - Floorstands are adjustable +/- 2 inches and are available with a factory installed turning vane or with seismic construction.

60% Efficient Filter - The standard 30% efficient filter may be replaced with 60% efficient filter (based on ASHRAE Std. 52-76). Filters are 2 inch deep, pleated type.

Extended Compressor Warranties - Extended compressor warranties are available for periods of twenty-four (24) or forty-two (42) months in addition to the standard factory eighteen (18) month warranty. These warranties are for the replacement of compressors and do not include labor.